1661 lines
65 KiB
C++
1661 lines
65 KiB
C++
/* OpenSceneGraph example, osgvolume.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <osg/Node>
|
|
#include <osg/Geometry>
|
|
#include <osg/Notify>
|
|
#include <osg/Texture3D>
|
|
#include <osg/TexGen>
|
|
#include <osg/Geode>
|
|
#include <osg/Billboard>
|
|
#include <osg/PositionAttitudeTransform>
|
|
#include <osg/ClipNode>
|
|
#include <osg/AlphaFunc>
|
|
#include <osg/TexGenNode>
|
|
#include <osg/TexEnv>
|
|
#include <osg/TexEnvCombine>
|
|
#include <osg/Material>
|
|
#include <osg/PrimitiveSet>
|
|
#include <osg/Endian>
|
|
|
|
#include <osgDB/Registry>
|
|
#include <osgDB/ReadFile>
|
|
#include <osgDB/WriteFile>
|
|
#include <osgDB/FileUtils>
|
|
#include <osgDB/FileNameUtils>
|
|
|
|
#include <osgGA/EventVisitor>
|
|
|
|
#include <osgUtil/CullVisitor>
|
|
|
|
#include <osgViewer/Viewer>
|
|
|
|
#include <iostream>
|
|
|
|
|
|
typedef std::vector< osg::ref_ptr<osg::Image> > ImageList;
|
|
|
|
// example ReadOperator
|
|
// struct ReadOperator
|
|
// {
|
|
// inline void luminance(float l) const { rgba(l,l,l,1.0f); }
|
|
// inline void alpha(float a) const { rgba(1.0f,1.0f,1.0f,a); }
|
|
// inline void luminance_alpha(float l,float a) const { rgba(l,l,l,a); }
|
|
// inline void rgb(float r,float g,float b) const { rgba(r,g,b,1.0f); }
|
|
// inline void rgba(float r,float g,float b,float a) const { std::cout<<"pixel("<<r<<", "<<g<<", "<<b<<", "<<a<<")"<<std::endl; }
|
|
// };
|
|
|
|
|
|
template <typename T, class O>
|
|
void _readRow(unsigned int num, GLenum pixelFormat, T* data,float scale, const O& operation)
|
|
{
|
|
switch(pixelFormat)
|
|
{
|
|
case(GL_LUMINANCE): { for(unsigned int i=0;i<num;++i) { float l = float(*data++)*scale; operation.luminance(l); } } break;
|
|
case(GL_ALPHA): { for(unsigned int i=0;i<num;++i) { float a = float(*data++)*scale; operation.alpha(a); } } break;
|
|
case(GL_LUMINANCE_ALPHA): { for(unsigned int i=0;i<num;++i) { float l = float(*data++)*scale; float a = float(*data++)*scale; operation.luminance_alpha(l,a); } } break;
|
|
case(GL_RGB): { for(unsigned int i=0;i<num;++i) { float r = float(*data++)*scale; float g = float(*data++)*scale; float b = float(*data++)*scale; operation.rgb(r,g,b); } } break;
|
|
case(GL_RGBA): { for(unsigned int i=0;i<num;++i) { float r = float(*data++)*scale; float g = float(*data++)*scale; float b = float(*data++)*scale; float a = float(*data++)*scale; operation.rgba(r,g,b,a); } } break;
|
|
case(GL_BGR): { for(unsigned int i=0;i<num;++i) { float b = float(*data++)*scale; float g = float(*data++)*scale; float r = float(*data++)*scale; operation.rgb(r,g,b); } } break;
|
|
case(GL_BGRA): { for(unsigned int i=0;i<num;++i) { float b = float(*data++)*scale; float g = float(*data++)*scale; float r = float(*data++)*scale; float a = float(*data++)*scale; operation.rgba(r,g,b,a); } } break;
|
|
}
|
|
}
|
|
|
|
template <class O>
|
|
void readRow(unsigned int num, GLenum pixelFormat, GLenum dataType, unsigned char* data, const O& operation)
|
|
{
|
|
switch(dataType)
|
|
{
|
|
case(GL_BYTE): _readRow(num,pixelFormat, (char*)data, 1.0f/128.0f, operation); break;
|
|
case(GL_UNSIGNED_BYTE): _readRow(num,pixelFormat, (unsigned char*)data, 1.0f/255.0f, operation); break;
|
|
case(GL_SHORT): _readRow(num,pixelFormat, (short*) data, 1.0f/32768.0f, operation); break;
|
|
case(GL_UNSIGNED_SHORT): _readRow(num,pixelFormat, (unsigned short*)data, 1.0f/65535.0f, operation); break;
|
|
case(GL_INT): _readRow(num,pixelFormat, (int*) data, 1.0f/2147483648.0f, operation); break;
|
|
case(GL_UNSIGNED_INT): _readRow(num,pixelFormat, (unsigned int*) data, 1.0f/4294967295.0f, operation); break;
|
|
case(GL_FLOAT): _readRow(num,pixelFormat, (float*) data, 1.0f, operation); break;
|
|
}
|
|
}
|
|
|
|
template <class O>
|
|
void readImage(osg::Image* image, const O& operation)
|
|
{
|
|
if (!image) return;
|
|
|
|
for(int r=0;r<image->r();++r)
|
|
{
|
|
for(int t=0;t<image->t();++t)
|
|
{
|
|
readRow(image->s(), image->getPixelFormat(), image->getDataType(), image->data(0,t,r), operation);
|
|
}
|
|
}
|
|
}
|
|
|
|
// example ModifyOperator
|
|
// struct ModifyOperator
|
|
// {
|
|
// inline void luminance(float& l) const {}
|
|
// inline void alpha(float& a) const {}
|
|
// inline void luminance_alpha(float& l,float& a) const {}
|
|
// inline void rgb(float& r,float& g,float& b) const {}
|
|
// inline void rgba(float& r,float& g,float& b,float& a) const {}
|
|
// };
|
|
|
|
|
|
template <typename T, class M>
|
|
void _modifyRow(unsigned int num, GLenum pixelFormat, T* data,float scale, const M& operation)
|
|
{
|
|
float inv_scale = 1.0f/scale;
|
|
switch(pixelFormat)
|
|
{
|
|
case(GL_LUMINANCE): { for(unsigned int i=0;i<num;++i) { float l = float(*data)*scale; operation.luminance(l); *data++ = T(l*inv_scale); } } break;
|
|
case(GL_ALPHA): { for(unsigned int i=0;i<num;++i) { float a = float(*data)*scale; operation.alpha(a); *data++ = T(a*inv_scale); } } break;
|
|
case(GL_LUMINANCE_ALPHA): { for(unsigned int i=0;i<num;++i) { float l = float(*data)*scale; float a = float(*(data+1))*scale; operation.luminance_alpha(l,a); *data++ = T(l*inv_scale); *data++ = T(a*inv_scale); } } break;
|
|
case(GL_RGB): { for(unsigned int i=0;i<num;++i) { float r = float(*data)*scale; float g = float(*(data+1))*scale; float b = float(*(data+2))*scale; operation.rgb(r,g,b); *data++ = T(r*inv_scale); *data++ = T(g*inv_scale); *data++ = T(b*inv_scale); } } break;
|
|
case(GL_RGBA): { for(unsigned int i=0;i<num;++i) { float r = float(*data)*scale; float g = float(*(data+1))*scale; float b = float(*(data+2))*scale; float a = float(*(data+3))*scale; operation.rgba(r,g,b,a); *data++ = T(r*inv_scale); *data++ = T(g*inv_scale); *data++ = T(g*inv_scale); *data++ = T(a*inv_scale); } } break;
|
|
case(GL_BGR): { for(unsigned int i=0;i<num;++i) { float b = float(*data)*scale; float g = float(*(data+1))*scale; float r = float(*(data+2))*scale; operation.rgb(r,g,b); *data++ = T(b*inv_scale); *data++ = T(g*inv_scale); *data++ = T(r*inv_scale); } } break;
|
|
case(GL_BGRA): { for(unsigned int i=0;i<num;++i) { float b = float(*data)*scale; float g = float(*(data+1))*scale; float r = float(*(data+2))*scale; float a = float(*(data+3))*scale; operation.rgba(r,g,b,a); *data++ = T(g*inv_scale); *data++ = T(b*inv_scale); *data++ = T(r*inv_scale); *data++ = T(a*inv_scale); } } break;
|
|
}
|
|
}
|
|
|
|
template <class M>
|
|
void modifyRow(unsigned int num, GLenum pixelFormat, GLenum dataType, unsigned char* data, const M& operation)
|
|
{
|
|
switch(dataType)
|
|
{
|
|
case(GL_BYTE): _modifyRow(num,pixelFormat, (char*)data, 1.0f/128.0f, operation); break;
|
|
case(GL_UNSIGNED_BYTE): _modifyRow(num,pixelFormat, (unsigned char*)data, 1.0f/255.0f, operation); break;
|
|
case(GL_SHORT): _modifyRow(num,pixelFormat, (short*) data, 1.0f/32768.0f, operation); break;
|
|
case(GL_UNSIGNED_SHORT): _modifyRow(num,pixelFormat, (unsigned short*)data, 1.0f/65535.0f, operation); break;
|
|
case(GL_INT): _modifyRow(num,pixelFormat, (int*) data, 1.0f/2147483648.0f, operation); break;
|
|
case(GL_UNSIGNED_INT): _modifyRow(num,pixelFormat, (unsigned int*) data, 1.0f/4294967295.0f, operation); break;
|
|
case(GL_FLOAT): _modifyRow(num,pixelFormat, (float*) data, 1.0f, operation); break;
|
|
}
|
|
}
|
|
|
|
template <class M>
|
|
void modifyImage(osg::Image* image, const M& operation)
|
|
{
|
|
if (!image) return;
|
|
|
|
for(int r=0;r<image->r();++r)
|
|
{
|
|
for(int t=0;t<image->t();++t)
|
|
{
|
|
modifyRow(image->s(), image->getPixelFormat(), image->getDataType(), image->data(0,t,r), operation);
|
|
}
|
|
}
|
|
}
|
|
|
|
struct PassThroughTransformFunction
|
|
{
|
|
unsigned char operator() (unsigned char c) const { return c; }
|
|
};
|
|
|
|
|
|
struct ProcessRow
|
|
{
|
|
virtual ~ProcessRow() {}
|
|
|
|
virtual void operator() (unsigned int num,
|
|
GLenum source_pixelFormat, unsigned char* source,
|
|
GLenum dest_pixelFormat, unsigned char* dest) const
|
|
{
|
|
switch(source_pixelFormat)
|
|
{
|
|
case(GL_LUMINANCE):
|
|
case(GL_ALPHA):
|
|
switch(dest_pixelFormat)
|
|
{
|
|
case(GL_LUMINANCE):
|
|
case(GL_ALPHA): A_to_A(num, source, dest); break;
|
|
case(GL_LUMINANCE_ALPHA): A_to_LA(num, source, dest); break;
|
|
case(GL_RGB): A_to_RGB(num, source, dest); break;
|
|
case(GL_RGBA): A_to_RGBA(num, source, dest); break;
|
|
}
|
|
break;
|
|
case(GL_LUMINANCE_ALPHA):
|
|
switch(dest_pixelFormat)
|
|
{
|
|
case(GL_LUMINANCE):
|
|
case(GL_ALPHA): LA_to_A(num, source, dest); break;
|
|
case(GL_LUMINANCE_ALPHA): LA_to_LA(num, source, dest); break;
|
|
case(GL_RGB): LA_to_RGB(num, source, dest); break;
|
|
case(GL_RGBA): LA_to_RGBA(num, source, dest); break;
|
|
}
|
|
break;
|
|
case(GL_RGB):
|
|
switch(dest_pixelFormat)
|
|
{
|
|
case(GL_LUMINANCE):
|
|
case(GL_ALPHA): RGB_to_A(num, source, dest); break;
|
|
case(GL_LUMINANCE_ALPHA): RGB_to_LA(num, source, dest); break;
|
|
case(GL_RGB): RGB_to_RGB(num, source, dest); break;
|
|
case(GL_RGBA): RGB_to_RGBA(num, source, dest); break;
|
|
}
|
|
break;
|
|
case(GL_RGBA):
|
|
switch(dest_pixelFormat)
|
|
{
|
|
case(GL_LUMINANCE):
|
|
case(GL_ALPHA): RGBA_to_A(num, source, dest); break;
|
|
case(GL_LUMINANCE_ALPHA): RGBA_to_LA(num, source, dest); break;
|
|
case(GL_RGB): RGBA_to_RGB(num, source, dest); break;
|
|
case(GL_RGBA): RGBA_to_RGBA(num, source, dest); break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// alpha sources..
|
|
virtual void A_to_A(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
*dest++ = *source++;
|
|
}
|
|
}
|
|
|
|
virtual void A_to_LA(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
*dest++ = *source;
|
|
*dest++ = *source++;
|
|
}
|
|
}
|
|
|
|
virtual void A_to_RGB(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
*dest++ = *source;
|
|
*dest++ = *source;
|
|
*dest++ = *source++;
|
|
}
|
|
}
|
|
|
|
virtual void A_to_RGBA(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
*dest++ = *source;
|
|
*dest++ = *source;
|
|
*dest++ = *source;
|
|
*dest++ = *source++;
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// alpha luminance sources..
|
|
virtual void LA_to_A(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
++source;
|
|
*dest++ = *source++;
|
|
}
|
|
}
|
|
|
|
virtual void LA_to_LA(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
*dest++ = *source++;
|
|
*dest++ = *source++;
|
|
}
|
|
}
|
|
|
|
virtual void LA_to_RGB(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
*dest++ = *source;
|
|
*dest++ = *source;
|
|
*dest++ = *source;
|
|
source+=2;
|
|
}
|
|
}
|
|
|
|
virtual void LA_to_RGBA(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
*dest++ = *source;
|
|
*dest++ = *source;
|
|
*dest++ = *source++;
|
|
*dest++ = *source++;
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// RGB sources..
|
|
virtual void RGB_to_A(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
unsigned char val = *source;
|
|
*dest++ = val;
|
|
source += 3;
|
|
}
|
|
}
|
|
|
|
virtual void RGB_to_LA(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
unsigned char val = *source;
|
|
*dest++ = val;
|
|
*dest++ = val;
|
|
source += 3;
|
|
}
|
|
}
|
|
|
|
virtual void RGB_to_RGB(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
*dest++ = *source++;
|
|
*dest++ = *source++;
|
|
*dest++ = *source++;
|
|
}
|
|
}
|
|
|
|
virtual void RGB_to_RGBA(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
unsigned char val = *source;
|
|
*dest++ = *source++;
|
|
*dest++ = *source++;
|
|
*dest++ = *source++;
|
|
*dest++ = val;
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// RGBA sources..
|
|
virtual void RGBA_to_A(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
source += 3;
|
|
*dest++ = *source++;
|
|
}
|
|
}
|
|
|
|
virtual void RGBA_to_LA(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
unsigned char val = *source;
|
|
source += 3;
|
|
*dest++ = val;
|
|
*dest++ = *source++;
|
|
}
|
|
}
|
|
|
|
virtual void RGBA_to_RGB(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
*dest++ = *source++;
|
|
*dest++ = *source++;
|
|
*dest++ = *source++;
|
|
++source;
|
|
}
|
|
}
|
|
|
|
virtual void RGBA_to_RGBA(unsigned int num, unsigned char* source, unsigned char* dest) const
|
|
{
|
|
for(unsigned int i=0;i<num;++i)
|
|
{
|
|
*dest++ = *source++;
|
|
*dest++ = *source++;
|
|
*dest++ = *source++;
|
|
*dest++ = *source++;
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
void clampToNearestValidPowerOfTwo(int& sizeX, int& sizeY, int& sizeZ, int s_maximumTextureSize, int t_maximumTextureSize, int r_maximumTextureSize)
|
|
{
|
|
// compute nearest powers of two for each axis.
|
|
int s_nearestPowerOfTwo = 1;
|
|
while(s_nearestPowerOfTwo<sizeX && s_nearestPowerOfTwo<s_maximumTextureSize) s_nearestPowerOfTwo*=2;
|
|
|
|
int t_nearestPowerOfTwo = 1;
|
|
while(t_nearestPowerOfTwo<sizeY && t_nearestPowerOfTwo<t_maximumTextureSize) t_nearestPowerOfTwo*=2;
|
|
|
|
int r_nearestPowerOfTwo = 1;
|
|
while(r_nearestPowerOfTwo<sizeZ && r_nearestPowerOfTwo<r_maximumTextureSize) r_nearestPowerOfTwo*=2;
|
|
|
|
sizeX = s_nearestPowerOfTwo;
|
|
sizeY = t_nearestPowerOfTwo;
|
|
sizeZ = r_nearestPowerOfTwo;
|
|
}
|
|
|
|
osg::Image* createTexture3D(ImageList& imageList, ProcessRow& processRow,
|
|
unsigned int numComponentsDesired,
|
|
int s_maximumTextureSize,
|
|
int t_maximumTextureSize,
|
|
int r_maximumTextureSize )
|
|
{
|
|
int max_s = 0;
|
|
int max_t = 0;
|
|
unsigned int max_components = 0;
|
|
int total_r = 0;
|
|
ImageList::iterator itr;
|
|
for(itr=imageList.begin();
|
|
itr!=imageList.end();
|
|
++itr)
|
|
{
|
|
osg::Image* image = itr->get();
|
|
GLenum pixelFormat = image->getPixelFormat();
|
|
if (pixelFormat==GL_ALPHA ||
|
|
pixelFormat==GL_LUMINANCE ||
|
|
pixelFormat==GL_LUMINANCE_ALPHA ||
|
|
pixelFormat==GL_RGB ||
|
|
pixelFormat==GL_RGBA)
|
|
{
|
|
max_s = osg::maximum(image->s(), max_s);
|
|
max_t = osg::maximum(image->t(), max_t);
|
|
max_components = osg::maximum(osg::Image::computeNumComponents(pixelFormat), max_components);
|
|
total_r += image->r();
|
|
}
|
|
else
|
|
{
|
|
osg::notify(osg::NOTICE)<<"Image "<<image->getFileName()<<" has unsuitable pixel format"<< std::hex<< pixelFormat << std::dec << std::endl;
|
|
}
|
|
}
|
|
|
|
if (numComponentsDesired!=0) max_components = numComponentsDesired;
|
|
|
|
GLenum desiredPixelFormat = 0;
|
|
switch(max_components)
|
|
{
|
|
case(1):
|
|
osg::notify(osg::NOTICE)<<"desiredPixelFormat = GL_LUMINANCE" << std::endl;
|
|
desiredPixelFormat = GL_LUMINANCE;
|
|
break;
|
|
case(2):
|
|
osg::notify(osg::NOTICE)<<"desiredPixelFormat = GL_LUMINANCE_ALPHA" << std::endl;
|
|
desiredPixelFormat = GL_LUMINANCE_ALPHA;
|
|
break;
|
|
case(3):
|
|
osg::notify(osg::NOTICE)<<"desiredPixelFormat = GL_RGB" << std::endl;
|
|
desiredPixelFormat = GL_RGB;
|
|
break;
|
|
case(4):
|
|
osg::notify(osg::NOTICE)<<"desiredPixelFormat = GL_RGBA" << std::endl;
|
|
desiredPixelFormat = GL_RGBA;
|
|
break;
|
|
}
|
|
if (desiredPixelFormat==0) return 0;
|
|
|
|
// compute nearest powers of two for each axis.
|
|
int s_nearestPowerOfTwo = 1;
|
|
while(s_nearestPowerOfTwo<max_s && s_nearestPowerOfTwo<s_maximumTextureSize) s_nearestPowerOfTwo*=2;
|
|
|
|
int t_nearestPowerOfTwo = 1;
|
|
while(t_nearestPowerOfTwo<max_t && t_nearestPowerOfTwo<t_maximumTextureSize) t_nearestPowerOfTwo*=2;
|
|
|
|
int r_nearestPowerOfTwo = 1;
|
|
while(r_nearestPowerOfTwo<total_r && r_nearestPowerOfTwo<r_maximumTextureSize) r_nearestPowerOfTwo*=2;
|
|
|
|
|
|
osg::notify(osg::NOTICE)<<"max image width = "<<max_s<<" nearest power of two = "<<s_nearestPowerOfTwo<<std::endl;
|
|
osg::notify(osg::NOTICE)<<"max image height = "<<max_t<<" nearest power of two = "<<t_nearestPowerOfTwo<<std::endl;
|
|
osg::notify(osg::NOTICE)<<"max image depth = "<<total_r<<" nearest power of two = "<<r_nearestPowerOfTwo<<std::endl;
|
|
|
|
// now allocate the 3d texture;
|
|
osg::ref_ptr<osg::Image> image_3d = new osg::Image;
|
|
image_3d->allocateImage(s_nearestPowerOfTwo,t_nearestPowerOfTwo,r_nearestPowerOfTwo,
|
|
desiredPixelFormat,GL_UNSIGNED_BYTE);
|
|
|
|
|
|
unsigned int r_offset = (total_r<r_nearestPowerOfTwo) ? r_nearestPowerOfTwo/2 - total_r/2 : 0;
|
|
|
|
int curr_dest_r = r_offset;
|
|
|
|
// copy across the values from the source images into the image_3d.
|
|
for(itr=imageList.begin();
|
|
itr!=imageList.end();
|
|
++itr)
|
|
{
|
|
osg::Image* image = itr->get();
|
|
GLenum pixelFormat = image->getPixelFormat();
|
|
if (pixelFormat==GL_ALPHA ||
|
|
pixelFormat==GL_LUMINANCE ||
|
|
pixelFormat==GL_LUMINANCE_ALPHA ||
|
|
pixelFormat==GL_RGB ||
|
|
pixelFormat==GL_RGBA)
|
|
{
|
|
|
|
int num_r = osg::minimum(image->r(), (image_3d->r() - curr_dest_r));
|
|
int num_t = osg::minimum(image->t(), image_3d->t());
|
|
int num_s = osg::minimum(image->s(), image_3d->s());
|
|
|
|
unsigned int s_offset_dest = (image->s()<s_nearestPowerOfTwo) ? s_nearestPowerOfTwo/2 - image->s()/2 : 0;
|
|
unsigned int t_offset_dest = (image->t()<t_nearestPowerOfTwo) ? t_nearestPowerOfTwo/2 - image->t()/2 : 0;
|
|
|
|
for(int r=0;r<num_r;++r, ++curr_dest_r)
|
|
{
|
|
for(int t=0;t<num_t;++t)
|
|
{
|
|
unsigned char* dest = image_3d->data(s_offset_dest,t+t_offset_dest,curr_dest_r);
|
|
unsigned char* source = image->data(0,t,r);
|
|
|
|
processRow(num_s, image->getPixelFormat(), source, image_3d->getPixelFormat(), dest);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return image_3d.release();
|
|
}
|
|
|
|
|
|
osg::Image* createNormalMapTexture(osg::Image* image_3d)
|
|
{
|
|
unsigned int sourcePixelIncrement = 1;
|
|
unsigned int alphaOffset = 0;
|
|
switch(image_3d->getPixelFormat())
|
|
{
|
|
case(GL_ALPHA):
|
|
case(GL_LUMINANCE):
|
|
sourcePixelIncrement = 1;
|
|
alphaOffset = 0;
|
|
break;
|
|
case(GL_LUMINANCE_ALPHA):
|
|
sourcePixelIncrement = 2;
|
|
alphaOffset = 1;
|
|
break;
|
|
case(GL_RGB):
|
|
sourcePixelIncrement = 3;
|
|
alphaOffset = 0;
|
|
break;
|
|
case(GL_RGBA):
|
|
sourcePixelIncrement = 4;
|
|
alphaOffset = 3;
|
|
break;
|
|
default:
|
|
osg::notify(osg::NOTICE)<<"Source pixel format not support for normal map generation."<<std::endl;
|
|
return 0;
|
|
}
|
|
|
|
osg::ref_ptr<osg::Image> normalmap_3d = new osg::Image;
|
|
normalmap_3d->allocateImage(image_3d->s(),image_3d->t(),image_3d->r(),
|
|
GL_RGBA,GL_UNSIGNED_BYTE);
|
|
|
|
if (osg::getCpuByteOrder()==osg::LittleEndian) alphaOffset = sourcePixelIncrement-alphaOffset-1;
|
|
|
|
for(int r=1;r<image_3d->r()-1;++r)
|
|
{
|
|
for(int t=1;t<image_3d->t()-1;++t)
|
|
{
|
|
unsigned char* ptr = image_3d->data(1,t,r)+alphaOffset;
|
|
unsigned char* left = image_3d->data(0,t,r)+alphaOffset;
|
|
unsigned char* right = image_3d->data(2,t,r)+alphaOffset;
|
|
unsigned char* above = image_3d->data(1,t+1,r)+alphaOffset;
|
|
unsigned char* below = image_3d->data(1,t-1,r)+alphaOffset;
|
|
unsigned char* in = image_3d->data(1,t,r+1)+alphaOffset;
|
|
unsigned char* out = image_3d->data(1,t,r-1)+alphaOffset;
|
|
|
|
unsigned char* destination = (unsigned char*) normalmap_3d->data(1,t,r);
|
|
|
|
for(int s=1;s<image_3d->s()-1;++s)
|
|
{
|
|
|
|
osg::Vec3 grad((float)(*left)-(float)(*right),
|
|
(float)(*below)-(float)(*above),
|
|
(float)(*out) -(float)(*in));
|
|
|
|
grad.normalize();
|
|
|
|
if (grad.x()==0.0f && grad.y()==0.0f && grad.z()==0.0f)
|
|
{
|
|
grad.set(128.0f,128.0f,128.0f);
|
|
}
|
|
else
|
|
{
|
|
grad.x() = osg::clampBetween((grad.x()+1.0f)*128.0f,0.0f,255.0f);
|
|
grad.y() = osg::clampBetween((grad.y()+1.0f)*128.0f,0.0f,255.0f);
|
|
grad.z() = osg::clampBetween((grad.z()+1.0f)*128.0f,0.0f,255.0f);
|
|
}
|
|
|
|
*(destination++) = (unsigned char)(grad.x()); // scale and bias X.
|
|
*(destination++) = (unsigned char)(grad.y()); // scale and bias Y.
|
|
*(destination++) = (unsigned char)(grad.z()); // scale and bias Z.
|
|
|
|
*destination++ = *ptr;
|
|
|
|
ptr += sourcePixelIncrement;
|
|
left += sourcePixelIncrement;
|
|
right += sourcePixelIncrement;
|
|
above += sourcePixelIncrement;
|
|
below += sourcePixelIncrement;
|
|
in += sourcePixelIncrement;
|
|
out += sourcePixelIncrement;
|
|
}
|
|
}
|
|
}
|
|
|
|
return normalmap_3d.release();
|
|
}
|
|
|
|
|
|
|
|
osg::Node* createCube(float size,float alpha, unsigned int numSlices, float sliceEnd=1.0f)
|
|
{
|
|
|
|
// set up the Geometry.
|
|
osg::Geometry* geom = new osg::Geometry;
|
|
|
|
float halfSize = size*0.5f;
|
|
float y = halfSize;
|
|
float dy =-size*1.4/(float)(numSlices-1)*sliceEnd;
|
|
|
|
//y = -halfSize;
|
|
//dy *= 0.5;
|
|
|
|
osg::Vec3Array* coords = new osg::Vec3Array(4*numSlices);
|
|
geom->setVertexArray(coords);
|
|
for(unsigned int i=0;i<numSlices;++i, y+=dy)
|
|
{
|
|
(*coords)[i*4+0].set(-halfSize,y,halfSize);
|
|
(*coords)[i*4+1].set(-halfSize,y,-halfSize);
|
|
(*coords)[i*4+2].set(halfSize,y,-halfSize);
|
|
(*coords)[i*4+3].set(halfSize,y,halfSize);
|
|
}
|
|
|
|
osg::Vec3Array* normals = new osg::Vec3Array(1);
|
|
(*normals)[0].set(0.0f,-1.0f,0.0f);
|
|
geom->setNormalArray(normals);
|
|
geom->setNormalBinding(osg::Geometry::BIND_OVERALL);
|
|
|
|
osg::Vec4Array* colors = new osg::Vec4Array(1);
|
|
(*colors)[0].set(1.0f,1.0f,1.0f,alpha);
|
|
geom->setColorArray(colors);
|
|
geom->setColorBinding(osg::Geometry::BIND_OVERALL);
|
|
|
|
geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS,0,coords->size()));
|
|
|
|
osg::Billboard* billboard = new osg::Billboard;
|
|
billboard->setMode(osg::Billboard::POINT_ROT_WORLD);
|
|
billboard->addDrawable(geom);
|
|
billboard->setPosition(0,osg::Vec3(0.0f,0.0f,0.0f));
|
|
|
|
return billboard;
|
|
}
|
|
|
|
class FollowMouseCallback : public osgGA::GUIEventHandler, public osg::StateSet::Callback
|
|
{
|
|
public:
|
|
|
|
FollowMouseCallback()
|
|
{
|
|
_updateTransparency = false;
|
|
_updateAlphaCutOff = false;
|
|
_updateSampleDensity = false;
|
|
}
|
|
|
|
FollowMouseCallback(const FollowMouseCallback&,const osg::CopyOp&) {}
|
|
|
|
META_Object(osg,FollowMouseCallback);
|
|
|
|
virtual void operator() (osg::StateSet* stateset, osg::NodeVisitor* nv)
|
|
{
|
|
if (nv->getVisitorType()==osg::NodeVisitor::EVENT_VISITOR)
|
|
{
|
|
osgGA::EventVisitor* ev = dynamic_cast<osgGA::EventVisitor*>(nv);
|
|
if (ev)
|
|
{
|
|
osgGA::GUIActionAdapter* aa = ev->getActionAdapter();
|
|
osgGA::EventQueue::Events& events = ev->getEvents();
|
|
for(osgGA::EventQueue::Events::iterator itr=events.begin();
|
|
itr!=events.end();
|
|
++itr)
|
|
{
|
|
handle(*(*itr), *aa, stateset, ev);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&, osg::Object* object, osg::NodeVisitor*)
|
|
{
|
|
osg::StateSet* stateset = dynamic_cast<osg::StateSet*>(object);
|
|
if (!stateset) return false;
|
|
|
|
switch(ea.getEventType())
|
|
{
|
|
case(osgGA::GUIEventAdapter::MOVE):
|
|
case(osgGA::GUIEventAdapter::DRAG):
|
|
{
|
|
float v = ea.getY()*0.5f+0.5f;
|
|
osg::Uniform* uniform = 0;
|
|
if (_updateTransparency && (uniform = stateset->getUniform("transparency"))) uniform->set(v);
|
|
if (_updateAlphaCutOff && (uniform = stateset->getUniform("alphaCutOff"))) uniform->set(v);
|
|
if (_updateSampleDensity && (uniform = stateset->getUniform("sampleDensity"))) uniform->set(powf(v,5));
|
|
break;
|
|
}
|
|
case(osgGA::GUIEventAdapter::KEYDOWN):
|
|
{
|
|
if (ea.getKey()=='t') _updateTransparency = true;
|
|
if (ea.getKey()=='a') _updateAlphaCutOff = true;
|
|
if (ea.getKey()=='d') _updateSampleDensity = true;
|
|
break;
|
|
}
|
|
case(osgGA::GUIEventAdapter::KEYUP):
|
|
{
|
|
if (ea.getKey()=='t') _updateTransparency = false;
|
|
if (ea.getKey()=='a') _updateAlphaCutOff = false;
|
|
if (ea.getKey()=='d') _updateSampleDensity = false;
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool _updateTransparency;
|
|
bool _updateAlphaCutOff;
|
|
bool _updateSampleDensity;
|
|
|
|
};
|
|
|
|
osg::Node* createShaderModel(osg::ref_ptr<osg::Image>& image_3d, osg::ref_ptr<osg::Image>& /*normalmap_3d*/,
|
|
osg::Texture::InternalFormatMode internalFormatMode,
|
|
float /*xSize*/, float /*ySize*/, float /*zSize*/,
|
|
float /*xMultiplier*/, float /*yMultiplier*/, float /*zMultiplier*/,
|
|
unsigned int /*numSlices*/=500, float /*sliceEnd*/=1.0f, float alphaFuncValue=0.02f)
|
|
{
|
|
osg::Geode* geode = new osg::Geode;
|
|
osg::StateSet* stateset = geode->getOrCreateStateSet();
|
|
|
|
stateset->setEventCallback(new FollowMouseCallback);
|
|
|
|
stateset->setMode(GL_ALPHA_TEST,osg::StateAttribute::ON);
|
|
|
|
// set up the 3d texture itself,
|
|
// note, well set the filtering up so that mip mapping is disabled,
|
|
// gluBuild3DMipsmaps doesn't do a very good job of handled the
|
|
// imbalanced dimensions of the 256x256x4 texture.
|
|
osg::Texture3D* texture3D = new osg::Texture3D;
|
|
texture3D->setFilter(osg::Texture3D::MIN_FILTER,osg::Texture3D::LINEAR);
|
|
texture3D->setFilter(osg::Texture3D::MAG_FILTER,osg::Texture3D::LINEAR);
|
|
texture3D->setWrap(osg::Texture3D::WRAP_R,osg::Texture3D::CLAMP);
|
|
texture3D->setWrap(osg::Texture3D::WRAP_S,osg::Texture3D::CLAMP);
|
|
texture3D->setWrap(osg::Texture3D::WRAP_T,osg::Texture3D::CLAMP);
|
|
if (image_3d->getPixelFormat()==GL_ALPHA ||
|
|
image_3d->getPixelFormat()==GL_LUMINANCE)
|
|
{
|
|
texture3D->setInternalFormatMode(osg::Texture3D::USE_USER_DEFINED_FORMAT);
|
|
texture3D->setInternalFormat(GL_INTENSITY);
|
|
}
|
|
else
|
|
{
|
|
texture3D->setInternalFormatMode(internalFormatMode);
|
|
}
|
|
|
|
texture3D->setImage(image_3d.get());
|
|
|
|
stateset->setTextureAttributeAndModes(0,texture3D,osg::StateAttribute::ON);
|
|
|
|
osg::Program* program = new osg::Program;
|
|
stateset->setAttribute(program);
|
|
|
|
// get shaders from source
|
|
std::string vertexShaderFile = osgDB::findDataFile("volume.vert");
|
|
if (!vertexShaderFile.empty())
|
|
{
|
|
program->addShader(osg::Shader::readShaderFile(osg::Shader::VERTEX, vertexShaderFile));
|
|
}
|
|
else
|
|
{
|
|
char vertexShaderSource[] =
|
|
"varying vec3 texcoord;\n"
|
|
"varying vec3 cameraPos;\n"
|
|
"\n"
|
|
"void main(void)\n"
|
|
"{\n"
|
|
" texcoord = gl_MultiTexCoord0.xyz;\n"
|
|
" gl_Position = ftransform();\n"
|
|
" cameraPos=vec4(gl_ModelViewMatrixInverse*vec4(0,0,0,1)).xyz;\n"
|
|
"}\n";
|
|
|
|
osg::Shader* vertex_shader = new osg::Shader(osg::Shader::VERTEX, vertexShaderSource);
|
|
program->addShader(vertex_shader);
|
|
|
|
}
|
|
|
|
std::string fragmentShaderFile = osgDB::findDataFile("volume.frag");
|
|
if (!fragmentShaderFile.empty())
|
|
{
|
|
program->addShader(osg::Shader::readShaderFile(osg::Shader::FRAGMENT, fragmentShaderFile));
|
|
}
|
|
else
|
|
{
|
|
//////////////////////////////////////////////////////////////////
|
|
// fragment shader
|
|
//
|
|
char fragmentShaderSource[] =
|
|
"uniform sampler3D baseTexture;\n"
|
|
"uniform float sampleDensity;\n"
|
|
"uniform float transparency;\n"
|
|
"uniform float alphaCutOff;\n"
|
|
"\n"
|
|
"varying vec3 cameraPos;\n"
|
|
"varying vec3 texcoord;\n"
|
|
"\n"
|
|
"void main(void)\n"
|
|
"{ \n"
|
|
" vec3 deltaTexCoord=normalize(cameraPos-texcoord.xyz)*sampleDensity;\n"
|
|
" gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0); \n"
|
|
" while (texcoord.x>=0.0 && texcoord.x<=1.0 &&\n"
|
|
" texcoord.y>=0.0 && texcoord.y<=1.0 &&\n"
|
|
" texcoord.z>=0.0 && texcoord.z<=1.0)\n"
|
|
" {\n"
|
|
" vec4 color = texture3D( baseTexture, texcoord);\n"
|
|
" float r = color[3]*transparency;\n"
|
|
" if (r>alphaCutOff)\n"
|
|
" {\n"
|
|
" gl_FragColor.xyz = gl_FragColor.xyz*(1.0-r)+color.xyz*r;\n"
|
|
" gl_FragColor.w += r;\n"
|
|
" }\n"
|
|
" texcoord += deltaTexCoord; \n"
|
|
" }\n"
|
|
" if (gl_FragColor.w>1.0) gl_FragColor.w = 1.0; \n"
|
|
"}\n";
|
|
|
|
osg::Shader* fragment_shader = new osg::Shader(osg::Shader::FRAGMENT, fragmentShaderSource);
|
|
program->addShader(fragment_shader);
|
|
}
|
|
|
|
osg::Uniform* baseTextureSampler = new osg::Uniform("baseTexture",0);
|
|
stateset->addUniform(baseTextureSampler);
|
|
|
|
osg::Uniform* sampleDensity = new osg::Uniform("sampleDensity", 0.01f);
|
|
stateset->addUniform(sampleDensity);
|
|
|
|
osg::Uniform* transpancy = new osg::Uniform("transparency",0.5f);
|
|
stateset->addUniform(transpancy);
|
|
|
|
osg::Uniform* alphaCutOff = new osg::Uniform("alphaCutOff",alphaFuncValue);
|
|
stateset->addUniform(alphaCutOff);
|
|
|
|
stateset->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
|
|
|
|
{
|
|
osg::Geometry* geom = new osg::Geometry;
|
|
|
|
osg::Vec3Array* coords = new osg::Vec3Array(8);
|
|
(*coords)[0].set(0,0,0);
|
|
(*coords)[1].set(1,0,0);
|
|
(*coords)[2].set(1,1,0);
|
|
(*coords)[3].set(0,1,0);
|
|
(*coords)[4].set(0,0,1);
|
|
(*coords)[5].set(1,0,1);
|
|
(*coords)[6].set(1,1,1);
|
|
(*coords)[7].set(0,1,1);
|
|
geom->setVertexArray(coords);
|
|
|
|
osg::Vec3Array* tcoords = new osg::Vec3Array(8);
|
|
(*tcoords)[0].set(0,0,0);
|
|
(*tcoords)[1].set(1,0,0);
|
|
(*tcoords)[2].set(1,1,0);
|
|
(*tcoords)[3].set(0,1,0);
|
|
(*tcoords)[4].set(0,0,1);
|
|
(*tcoords)[5].set(1,0,1);
|
|
(*tcoords)[6].set(1,1,1);
|
|
(*tcoords)[7].set(0,1,1);
|
|
geom->setTexCoordArray(0,tcoords);
|
|
|
|
osg::Vec4Array* colours = new osg::Vec4Array(1);
|
|
(*colours)[0].set(1.0f,1.0f,1.0,1.0f);
|
|
geom->setColorArray(colours);
|
|
geom->setColorBinding(osg::Geometry::BIND_OVERALL);
|
|
|
|
osg::DrawElementsUShort* drawElements = new osg::DrawElementsUShort(GL_QUADS);
|
|
// bottom
|
|
drawElements->push_back(0);
|
|
drawElements->push_back(1);
|
|
drawElements->push_back(2);
|
|
drawElements->push_back(3);
|
|
|
|
// bottom
|
|
drawElements->push_back(3);
|
|
drawElements->push_back(2);
|
|
drawElements->push_back(6);
|
|
drawElements->push_back(7);
|
|
|
|
// left
|
|
drawElements->push_back(0);
|
|
drawElements->push_back(3);
|
|
drawElements->push_back(7);
|
|
drawElements->push_back(4);
|
|
|
|
// right
|
|
drawElements->push_back(5);
|
|
drawElements->push_back(6);
|
|
drawElements->push_back(2);
|
|
drawElements->push_back(1);
|
|
|
|
// front
|
|
drawElements->push_back(1);
|
|
drawElements->push_back(0);
|
|
drawElements->push_back(4);
|
|
drawElements->push_back(5);
|
|
|
|
// top
|
|
drawElements->push_back(7);
|
|
drawElements->push_back(6);
|
|
drawElements->push_back(5);
|
|
drawElements->push_back(4);
|
|
|
|
geom->addPrimitiveSet(drawElements);
|
|
|
|
geode->addDrawable(geom);
|
|
|
|
}
|
|
|
|
return geode;
|
|
}
|
|
|
|
osg::Node* createModel(osg::ref_ptr<osg::Image>& image_3d, osg::ref_ptr<osg::Image>& normalmap_3d,
|
|
osg::Texture::InternalFormatMode internalFormatMode,
|
|
float xSize, float ySize, float zSize,
|
|
float xMultiplier, float yMultiplier, float zMultiplier,
|
|
unsigned int numSlices=500, float sliceEnd=1.0f, float alphaFuncValue=0.02f)
|
|
{
|
|
bool two_pass = normalmap_3d.valid() && (image_3d->getPixelFormat()==GL_RGB || image_3d->getPixelFormat()==GL_RGBA);
|
|
|
|
osg::Group* group = new osg::Group;
|
|
|
|
osg::TexGenNode* texgenNode_0 = new osg::TexGenNode;
|
|
texgenNode_0->setTextureUnit(0);
|
|
texgenNode_0->getTexGen()->setMode(osg::TexGen::EYE_LINEAR);
|
|
texgenNode_0->getTexGen()->setPlane(osg::TexGen::S, osg::Plane(xMultiplier,0.0f,0.0f,0.5f));
|
|
texgenNode_0->getTexGen()->setPlane(osg::TexGen::T, osg::Plane(0.0f,yMultiplier,0.0f,0.5f));
|
|
texgenNode_0->getTexGen()->setPlane(osg::TexGen::R, osg::Plane(0.0f,0.0f,zMultiplier,0.5f));
|
|
|
|
if (two_pass)
|
|
{
|
|
osg::TexGenNode* texgenNode_1 = new osg::TexGenNode;
|
|
texgenNode_1->setTextureUnit(1);
|
|
texgenNode_1->getTexGen()->setMode(osg::TexGen::EYE_LINEAR);
|
|
texgenNode_1->getTexGen()->setPlane(osg::TexGen::S, texgenNode_0->getTexGen()->getPlane(osg::TexGen::S));
|
|
texgenNode_1->getTexGen()->setPlane(osg::TexGen::T, texgenNode_0->getTexGen()->getPlane(osg::TexGen::T));
|
|
texgenNode_1->getTexGen()->setPlane(osg::TexGen::R, texgenNode_0->getTexGen()->getPlane(osg::TexGen::R));
|
|
|
|
texgenNode_1->addChild(texgenNode_0);
|
|
|
|
group->addChild(texgenNode_1);
|
|
}
|
|
else
|
|
{
|
|
group->addChild(texgenNode_0);
|
|
}
|
|
|
|
osg::BoundingBox bb(-xSize*0.5f,-ySize*0.5f,-zSize*0.5f,xSize*0.5f,ySize*0.5f,zSize*0.5f);
|
|
|
|
osg::ClipNode* clipnode = new osg::ClipNode;
|
|
clipnode->addChild(createCube(1.0f,1.0f, numSlices,sliceEnd));
|
|
clipnode->createClipBox(bb);
|
|
|
|
{
|
|
// set up the Geometry to enclose the clip volume to prevent near/far clipping from affecting billboard
|
|
osg::Geometry* geom = new osg::Geometry;
|
|
|
|
osg::Vec3Array* coords = new osg::Vec3Array();
|
|
coords->push_back(bb.corner(0));
|
|
coords->push_back(bb.corner(1));
|
|
coords->push_back(bb.corner(2));
|
|
coords->push_back(bb.corner(3));
|
|
coords->push_back(bb.corner(4));
|
|
coords->push_back(bb.corner(5));
|
|
coords->push_back(bb.corner(6));
|
|
coords->push_back(bb.corner(7));
|
|
|
|
geom->setVertexArray(coords);
|
|
|
|
osg::Vec4Array* colors = new osg::Vec4Array(1);
|
|
(*colors)[0].set(1.0f,1.0f,1.0f,1.0f);
|
|
geom->setColorArray(colors);
|
|
geom->setColorBinding(osg::Geometry::BIND_OVERALL);
|
|
|
|
geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::POINTS,0,coords->size()));
|
|
|
|
osg::Geode* geode = new osg::Geode;
|
|
geode->addDrawable(geom);
|
|
|
|
clipnode->addChild(geode);
|
|
|
|
}
|
|
|
|
texgenNode_0->addChild(clipnode);
|
|
|
|
osg::StateSet* stateset = texgenNode_0->getOrCreateStateSet();
|
|
|
|
stateset->setMode(GL_LIGHTING,osg::StateAttribute::ON);
|
|
stateset->setMode(GL_BLEND,osg::StateAttribute::ON);
|
|
stateset->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER,alphaFuncValue));
|
|
|
|
osg::Material* material = new osg::Material;
|
|
material->setDiffuse(osg::Material::FRONT_AND_BACK,osg::Vec4(1.0f,1.0f,1.0f,1.0f));
|
|
stateset->setAttributeAndModes(material);
|
|
|
|
osg::Vec3 lightDirection(1.0f,-1.0f,1.0f);
|
|
lightDirection.normalize();
|
|
|
|
if (normalmap_3d.valid())
|
|
{
|
|
if (two_pass)
|
|
{
|
|
|
|
// set up normal texture
|
|
osg::Texture3D* bump_texture3D = new osg::Texture3D;
|
|
bump_texture3D->setFilter(osg::Texture3D::MIN_FILTER,osg::Texture3D::LINEAR);
|
|
bump_texture3D->setFilter(osg::Texture3D::MAG_FILTER,osg::Texture3D::LINEAR);
|
|
bump_texture3D->setWrap(osg::Texture3D::WRAP_R,osg::Texture3D::CLAMP);
|
|
bump_texture3D->setWrap(osg::Texture3D::WRAP_S,osg::Texture3D::CLAMP);
|
|
bump_texture3D->setWrap(osg::Texture3D::WRAP_T,osg::Texture3D::CLAMP);
|
|
bump_texture3D->setImage(normalmap_3d.get());
|
|
|
|
bump_texture3D->setInternalFormatMode(internalFormatMode);
|
|
|
|
stateset->setTextureAttributeAndModes(0,bump_texture3D,osg::StateAttribute::ON);
|
|
|
|
osg::TexEnvCombine* tec = new osg::TexEnvCombine;
|
|
tec->setConstantColorAsLightDirection(lightDirection);
|
|
|
|
tec->setCombine_RGB(osg::TexEnvCombine::DOT3_RGB);
|
|
tec->setSource0_RGB(osg::TexEnvCombine::CONSTANT);
|
|
tec->setOperand0_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
tec->setSource1_RGB(osg::TexEnvCombine::TEXTURE);
|
|
tec->setOperand1_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
|
|
tec->setCombine_Alpha(osg::TexEnvCombine::REPLACE);
|
|
tec->setSource0_Alpha(osg::TexEnvCombine::PRIMARY_COLOR);
|
|
tec->setOperand0_Alpha(osg::TexEnvCombine::SRC_ALPHA);
|
|
tec->setSource1_Alpha(osg::TexEnvCombine::TEXTURE);
|
|
tec->setOperand1_Alpha(osg::TexEnvCombine::SRC_ALPHA);
|
|
|
|
stateset->setTextureAttributeAndModes(0, tec, osg::StateAttribute::OVERRIDE|osg::StateAttribute::ON);
|
|
|
|
stateset->setTextureMode(0,GL_TEXTURE_GEN_S,osg::StateAttribute::ON);
|
|
stateset->setTextureMode(0,GL_TEXTURE_GEN_T,osg::StateAttribute::ON);
|
|
stateset->setTextureMode(0,GL_TEXTURE_GEN_R,osg::StateAttribute::ON);
|
|
|
|
|
|
// set up color texture
|
|
osg::Texture3D* texture3D = new osg::Texture3D;
|
|
texture3D->setFilter(osg::Texture3D::MIN_FILTER,osg::Texture3D::LINEAR);
|
|
texture3D->setFilter(osg::Texture3D::MAG_FILTER,osg::Texture3D::LINEAR);
|
|
texture3D->setWrap(osg::Texture3D::WRAP_R,osg::Texture3D::CLAMP);
|
|
texture3D->setWrap(osg::Texture3D::WRAP_S,osg::Texture3D::CLAMP);
|
|
texture3D->setWrap(osg::Texture3D::WRAP_T,osg::Texture3D::CLAMP);
|
|
if (image_3d->getPixelFormat()==GL_ALPHA ||
|
|
image_3d->getPixelFormat()==GL_LUMINANCE)
|
|
{
|
|
texture3D->setInternalFormatMode(osg::Texture3D::USE_USER_DEFINED_FORMAT);
|
|
texture3D->setInternalFormat(GL_INTENSITY);
|
|
}
|
|
else
|
|
{
|
|
texture3D->setInternalFormatMode(internalFormatMode);
|
|
}
|
|
texture3D->setImage(image_3d.get());
|
|
|
|
stateset->setTextureAttributeAndModes(1,texture3D,osg::StateAttribute::ON);
|
|
|
|
stateset->setTextureMode(1,GL_TEXTURE_GEN_S,osg::StateAttribute::ON);
|
|
stateset->setTextureMode(1,GL_TEXTURE_GEN_T,osg::StateAttribute::ON);
|
|
stateset->setTextureMode(1,GL_TEXTURE_GEN_R,osg::StateAttribute::ON);
|
|
|
|
stateset->setTextureAttributeAndModes(1,new osg::TexEnv(),osg::StateAttribute::ON);
|
|
|
|
}
|
|
else
|
|
{
|
|
osg::ref_ptr<osg::Image> normalmap_3d = createNormalMapTexture(image_3d.get());
|
|
osg::Texture3D* bump_texture3D = new osg::Texture3D;
|
|
bump_texture3D->setFilter(osg::Texture3D::MIN_FILTER,osg::Texture3D::LINEAR);
|
|
bump_texture3D->setFilter(osg::Texture3D::MAG_FILTER,osg::Texture3D::LINEAR);
|
|
bump_texture3D->setWrap(osg::Texture3D::WRAP_R,osg::Texture3D::CLAMP);
|
|
bump_texture3D->setWrap(osg::Texture3D::WRAP_S,osg::Texture3D::CLAMP);
|
|
bump_texture3D->setWrap(osg::Texture3D::WRAP_T,osg::Texture3D::CLAMP);
|
|
bump_texture3D->setImage(normalmap_3d.get());
|
|
|
|
bump_texture3D->setInternalFormatMode(internalFormatMode);
|
|
|
|
stateset->setTextureAttributeAndModes(0,bump_texture3D,osg::StateAttribute::ON);
|
|
|
|
osg::TexEnvCombine* tec = new osg::TexEnvCombine;
|
|
tec->setConstantColorAsLightDirection(lightDirection);
|
|
|
|
tec->setCombine_RGB(osg::TexEnvCombine::DOT3_RGB);
|
|
tec->setSource0_RGB(osg::TexEnvCombine::CONSTANT);
|
|
tec->setOperand0_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
tec->setSource1_RGB(osg::TexEnvCombine::TEXTURE);
|
|
tec->setOperand1_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
|
|
tec->setCombine_Alpha(osg::TexEnvCombine::MODULATE);
|
|
tec->setSource0_Alpha(osg::TexEnvCombine::PRIMARY_COLOR);
|
|
tec->setOperand0_Alpha(osg::TexEnvCombine::SRC_ALPHA);
|
|
tec->setSource1_Alpha(osg::TexEnvCombine::TEXTURE);
|
|
tec->setOperand1_Alpha(osg::TexEnvCombine::SRC_ALPHA);
|
|
|
|
stateset->setTextureAttributeAndModes(0, tec, osg::StateAttribute::OVERRIDE|osg::StateAttribute::ON);
|
|
|
|
stateset->setTextureMode(0,GL_TEXTURE_GEN_S,osg::StateAttribute::ON);
|
|
stateset->setTextureMode(0,GL_TEXTURE_GEN_T,osg::StateAttribute::ON);
|
|
stateset->setTextureMode(0,GL_TEXTURE_GEN_R,osg::StateAttribute::ON);
|
|
|
|
image_3d = normalmap_3d;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// set up the 3d texture itself,
|
|
// note, well set the filtering up so that mip mapping is disabled,
|
|
// gluBuild3DMipsmaps doesn't do a very good job of handled the
|
|
// imbalanced dimensions of the 256x256x4 texture.
|
|
osg::Texture3D* texture3D = new osg::Texture3D;
|
|
texture3D->setFilter(osg::Texture3D::MIN_FILTER,osg::Texture3D::LINEAR);
|
|
texture3D->setFilter(osg::Texture3D::MAG_FILTER,osg::Texture3D::LINEAR);
|
|
texture3D->setWrap(osg::Texture3D::WRAP_R,osg::Texture3D::CLAMP);
|
|
texture3D->setWrap(osg::Texture3D::WRAP_S,osg::Texture3D::CLAMP);
|
|
texture3D->setWrap(osg::Texture3D::WRAP_T,osg::Texture3D::CLAMP);
|
|
if (image_3d->getPixelFormat()==GL_ALPHA ||
|
|
image_3d->getPixelFormat()==GL_LUMINANCE)
|
|
{
|
|
texture3D->setInternalFormatMode(osg::Texture3D::USE_USER_DEFINED_FORMAT);
|
|
texture3D->setInternalFormat(GL_INTENSITY);
|
|
}
|
|
else
|
|
{
|
|
texture3D->setInternalFormatMode(internalFormatMode);
|
|
}
|
|
|
|
texture3D->setImage(image_3d.get());
|
|
|
|
stateset->setTextureAttributeAndModes(0,texture3D,osg::StateAttribute::ON);
|
|
|
|
stateset->setTextureMode(0,GL_TEXTURE_GEN_S,osg::StateAttribute::ON);
|
|
stateset->setTextureMode(0,GL_TEXTURE_GEN_T,osg::StateAttribute::ON);
|
|
stateset->setTextureMode(0,GL_TEXTURE_GEN_R,osg::StateAttribute::ON);
|
|
|
|
stateset->setTextureAttributeAndModes(0,new osg::TexEnv(),osg::StateAttribute::ON);
|
|
}
|
|
|
|
return group;
|
|
}
|
|
|
|
struct FindRangeOperator
|
|
{
|
|
FindRangeOperator():
|
|
_rmin(FLT_MAX),
|
|
_rmax(-FLT_MAX),
|
|
_gmin(FLT_MAX),
|
|
_gmax(-FLT_MAX),
|
|
_bmin(FLT_MAX),
|
|
_bmax(-FLT_MAX),
|
|
_amin(FLT_MAX),
|
|
_amax(-FLT_MAX) {}
|
|
|
|
mutable float _rmin, _rmax, _gmin, _gmax, _bmin, _bmax, _amin, _amax;
|
|
|
|
inline void luminance(float l) const { rgb(l,l,l); }
|
|
inline void alpha(float a) const { _amin = osg::minimum(a,_amin); _amax = osg::maximum(a,_amax); }
|
|
inline void luminance_alpha(float l,float a) const { rgb(l,l,l); alpha(a); }
|
|
inline void rgb(float r,float g,float b) const { _rmin = osg::minimum(r,_rmin); _rmax = osg::maximum(r,_rmax); _gmin = osg::minimum(g,_gmin); _gmax = osg::maximum(g,_gmax); _bmin = osg::minimum(b,_bmin); _bmax = osg::maximum(b,_bmax); }
|
|
inline void rgba(float r,float g,float b,float a) const { rgb(r,g,b); alpha(a); }
|
|
};
|
|
|
|
struct ScaleOperator
|
|
{
|
|
ScaleOperator():_scale(1.0f) {}
|
|
ScaleOperator(float scale):_scale(scale) {}
|
|
ScaleOperator(const ScaleOperator& so):_scale(so._scale) {}
|
|
|
|
ScaleOperator& operator = (const ScaleOperator& so) { _scale = so._scale; return *this; }
|
|
|
|
float _scale;
|
|
|
|
inline void luminance(float& l) const { l*= _scale; }
|
|
inline void alpha(float& a) const { a*= _scale; }
|
|
inline void luminance_alpha(float& l,float& a) const { l*= _scale; a*= _scale; }
|
|
inline void rgb(float& r,float& g,float& b) const { r*= _scale; g*=_scale; b*=_scale; }
|
|
inline void rgba(float& r,float& g,float& b,float& a) const { r*= _scale; g*=_scale; b*=_scale; a*=_scale; }
|
|
};
|
|
|
|
struct RecordRowOperator
|
|
{
|
|
RecordRowOperator(unsigned int num):_colours(num),_pos(0) {}
|
|
|
|
mutable std::vector<osg::Vec4> _colours;
|
|
mutable unsigned int _pos;
|
|
|
|
inline void luminance(float l) const { rgba(l,l,l,1.0f); }
|
|
inline void alpha(float a) const { rgba(1.0f,1.0f,1.0f,a); }
|
|
inline void luminance_alpha(float l,float a) const { rgba(l,l,l,a); }
|
|
inline void rgb(float r,float g,float b) const { rgba(r,g,b,1.0f); }
|
|
inline void rgba(float r,float g,float b,float a) const { _colours[_pos++].set(r,g,b,a); }
|
|
};
|
|
|
|
struct WriteRowOperator
|
|
{
|
|
WriteRowOperator():_pos(0) {}
|
|
WriteRowOperator(unsigned int num):_colours(num),_pos(0) {}
|
|
|
|
std::vector<osg::Vec4> _colours;
|
|
mutable unsigned int _pos;
|
|
|
|
inline void luminance(float& l) const { l = _colours[_pos++].r(); }
|
|
inline void alpha(float& a) const { a = _colours[_pos++].a(); }
|
|
inline void luminance_alpha(float& l,float& a) const { l = _colours[_pos].r(); a = _colours[_pos++].a(); }
|
|
inline void rgb(float& r,float& g,float& b) const { r = _colours[_pos].r(); g = _colours[_pos].g(); b = _colours[_pos].b(); }
|
|
inline void rgba(float& r,float& g,float& b,float& a) const { r = _colours[_pos].r(); g = _colours[_pos].g(); b = _colours[_pos].b(); a = _colours[_pos++].a(); }
|
|
};
|
|
|
|
osg::Image* readRaw(int sizeX, int sizeY, int sizeZ, int numberBytesPerComponent, int numberOfComponents, const std::string& endian, const std::string& raw_filename)
|
|
{
|
|
std::ifstream fin(raw_filename.c_str(), std::ifstream::binary);
|
|
if (!fin) return 0;
|
|
|
|
GLenum pixelFormat;
|
|
switch(numberOfComponents)
|
|
{
|
|
case 1 : pixelFormat = GL_LUMINANCE; break;
|
|
case 2 : pixelFormat = GL_LUMINANCE_ALPHA; break;
|
|
case 3 : pixelFormat = GL_RGB; break;
|
|
case 4 : pixelFormat = GL_RGBA; break;
|
|
default :
|
|
osg::notify(osg::NOTICE)<<"Error: numberOfComponents="<<numberOfComponents<<" not supported, only 1,2,3 or 4 are supported."<<std::endl;
|
|
return 0;
|
|
}
|
|
|
|
|
|
GLenum dataType;
|
|
switch(numberBytesPerComponent)
|
|
{
|
|
case 1 : dataType = GL_UNSIGNED_BYTE; break;
|
|
case 2 : dataType = GL_UNSIGNED_SHORT; break;
|
|
case 4 : dataType = GL_UNSIGNED_INT; break;
|
|
default :
|
|
osg::notify(osg::NOTICE)<<"Error: numberBytesPerComponent="<<numberBytesPerComponent<<" not supported, only 1,2 or 4 are supported."<<std::endl;
|
|
return 0;
|
|
}
|
|
|
|
int s_maximumTextureSize=256, t_maximumTextureSize=256, r_maximumTextureSize=256;
|
|
|
|
int sizeS = sizeX;
|
|
int sizeT = sizeY;
|
|
int sizeR = sizeZ;
|
|
clampToNearestValidPowerOfTwo(sizeS, sizeT, sizeR, s_maximumTextureSize, t_maximumTextureSize, r_maximumTextureSize);
|
|
|
|
osg::ref_ptr<osg::Image> image = new osg::Image;
|
|
image->allocateImage(sizeS, sizeT, sizeR, pixelFormat, dataType);
|
|
|
|
|
|
bool endianSwap = (osg::getCpuByteOrder()==osg::BigEndian) ? (endian!="big") : (endian=="big");
|
|
|
|
unsigned int r_offset = (sizeZ<sizeR) ? sizeR/2 - sizeZ/2 : 0;
|
|
|
|
int offset = endianSwap ? numberBytesPerComponent : 0;
|
|
int delta = endianSwap ? -1 : 1;
|
|
for(int r=0;r<sizeZ;++r)
|
|
{
|
|
for(int t=0;t<sizeY;++t)
|
|
{
|
|
char* data = (char*) image->data(0,t,r+r_offset);
|
|
for(int s=0;s<sizeX;++s)
|
|
{
|
|
if (!fin) return 0;
|
|
|
|
for(int c=0;c<numberOfComponents;++c)
|
|
{
|
|
char* ptr = data+offset;
|
|
for(int b=0;b<numberBytesPerComponent;++b)
|
|
{
|
|
fin.read((char*)ptr, 1);
|
|
ptr += delta;
|
|
}
|
|
data += numberBytesPerComponent;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// normalise texture
|
|
{
|
|
// compute range of values
|
|
FindRangeOperator rangeOp;
|
|
readImage(image.get(), rangeOp);
|
|
modifyImage(image.get(),ScaleOperator(1.0f/rangeOp._rmax));
|
|
}
|
|
|
|
|
|
fin.close();
|
|
|
|
if (dataType!=GL_UNSIGNED_BYTE)
|
|
{
|
|
// need to convert to ubyte
|
|
|
|
osg::ref_ptr<osg::Image> new_image = new osg::Image;
|
|
new_image->allocateImage(sizeS, sizeT, sizeR, pixelFormat, GL_UNSIGNED_BYTE);
|
|
|
|
RecordRowOperator readOp(sizeS);
|
|
WriteRowOperator writeOp;
|
|
|
|
for(int r=0;r<sizeR;++r)
|
|
{
|
|
for(int t=0;t<sizeT;++t)
|
|
{
|
|
// reset the indices to beginning
|
|
readOp._pos = 0;
|
|
writeOp._pos = 0;
|
|
|
|
// read the pixels into readOp's _colour array
|
|
readRow(sizeS, pixelFormat, dataType, image->data(0,t,r), readOp);
|
|
|
|
// pass readOp's _colour array contents over to writeOp (note this is just a pointer swap).
|
|
writeOp._colours.swap(readOp._colours);
|
|
|
|
modifyRow(sizeS, pixelFormat, GL_UNSIGNED_BYTE, new_image->data(0,t,r), writeOp);
|
|
|
|
// return readOp's _colour array contents back to its rightful owner.
|
|
writeOp._colours.swap(readOp._colours);
|
|
}
|
|
}
|
|
|
|
image = new_image;
|
|
}
|
|
|
|
return image.release();
|
|
|
|
|
|
}
|
|
|
|
enum ColourSpaceOperation
|
|
{
|
|
NO_COLOUR_SPACE_OPERATION,
|
|
MODULATE_ALPHA_BY_LUMINANCE,
|
|
MODULATE_ALPHA_BY_COLOUR,
|
|
REPLACE_ALPHA_WITH_LUMINACE
|
|
};
|
|
|
|
struct ModulateAlphaByLuminanceOperator
|
|
{
|
|
ModulateAlphaByLuminanceOperator() {}
|
|
|
|
inline void luminance(float&) const {}
|
|
inline void alpha(float&) const {}
|
|
inline void luminance_alpha(float& l,float& a) const { a*= l; }
|
|
inline void rgb(float&,float&,float&) const {}
|
|
inline void rgba(float& r,float& g,float& b,float& a) const { float l = (r+g+b)*0.3333333; a *= l;}
|
|
};
|
|
|
|
struct ModulateAlphaByColourOperator
|
|
{
|
|
ModulateAlphaByColourOperator(const osg::Vec4& colour):_colour(colour) { _lum = _colour.length(); }
|
|
|
|
osg::Vec4 _colour;
|
|
float _lum;
|
|
|
|
inline void luminance(float&) const {}
|
|
inline void alpha(float&) const {}
|
|
inline void luminance_alpha(float& l,float& a) const { a*= l*_lum; }
|
|
inline void rgb(float&,float&,float&) const {}
|
|
inline void rgba(float& r,float& g,float& b,float& a) const { a = (r*_colour.r()+g*_colour.g()+b*_colour.b()+a*_colour.a()); }
|
|
};
|
|
|
|
struct ReplaceAlphaWithLuminanceOperator
|
|
{
|
|
ReplaceAlphaWithLuminanceOperator() {}
|
|
|
|
inline void luminance(float&) const {}
|
|
inline void alpha(float&) const {}
|
|
inline void luminance_alpha(float& l,float& a) const { a= l; }
|
|
inline void rgb(float&,float&,float&) const { }
|
|
inline void rgba(float& r,float& g,float& b,float& a) const { float l = (r+g+b)*0.3333333; a = l; }
|
|
};
|
|
|
|
void doColourSpaceConversion(ColourSpaceOperation op, osg::Image* image, osg::Vec4& colour)
|
|
{
|
|
switch(op)
|
|
{
|
|
case (MODULATE_ALPHA_BY_LUMINANCE):
|
|
std::cout<<"doing conversion MODULATE_ALPHA_BY_LUMINANCE"<<std::endl;
|
|
modifyImage(image,ModulateAlphaByLuminanceOperator());
|
|
break;
|
|
case (MODULATE_ALPHA_BY_COLOUR):
|
|
std::cout<<"doing conversion MODULATE_ALPHA_BY_COLOUR"<<std::endl;
|
|
modifyImage(image,ModulateAlphaByColourOperator(colour));
|
|
break;
|
|
case (REPLACE_ALPHA_WITH_LUMINACE):
|
|
std::cout<<"doing conversion REPLACE_ALPHA_WITH_LUMINACE"<<std::endl;
|
|
modifyImage(image,ReplaceAlphaWithLuminanceOperator());
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
int main( int argc, char **argv )
|
|
{
|
|
// use an ArgumentParser object to manage the program arguments.
|
|
osg::ArgumentParser arguments(&argc,argv);
|
|
|
|
// set up the usage document, in case we need to print out how to use this program.
|
|
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates use of 3D textures.");
|
|
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
|
|
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
|
|
arguments.getApplicationUsage()->addCommandLineOption("-n","Create normal map for per voxel lighting.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("-s <numSlices>","Number of slices to create.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--images [filenames]","Specify a stack of 2d images to build the 3d volume from.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--shader","Use OpenGL Shading Language.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--xSize <size>","Relative width of rendered brick.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--ySize <size>","Relative length of rendered brick.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--zSize <size>","Relative height of rendered brick.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--xMultiplier <multiplier>","Tex coord x mulitplier.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--yMultiplier <multiplier>","Tex coord y mulitplier.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--zMultiplier <multiplier>","Tex coord z mulitplier.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--clip <ratio>","clip volume as a ratio, 0.0 clip all, 1.0 clip none.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--maxTextureSize <size>","Set the texture maximum resolution in the s,t,r (x,y,z) dimensions.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--s_maxTextureSize <size>","Set the texture maximum resolution in the s (x) dimension.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--t_maxTextureSize <size>","Set the texture maximum resolution in the t (y) dimension.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--r_maxTextureSize <size>","Set the texture maximum resolution in the r (z) dimension.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--compressed","Enable the usage of compressed textures.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--compressed-arb","Enable the usage of OpenGL ARB compressed textures.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--compressed-dxt1","Enable the usage of S3TC DXT1 compressed textures.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--compressed-dxt3","Enable the usage of S3TC DXT3 compressed textures.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--compressed-dxt5","Enable the usage of S3TC DXT5 compressed textures.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--modulate-alpha-by-luminance","For each pixel multiple the alpha value by the luminance.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--replace-alpha-with-luminance","For each pixel mSet the alpha value to the luminance.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--num-components <num>","Set the number of components to in he target image.");
|
|
// arguments.getApplicationUsage()->addCommandLineOption("--raw <sizeX> <sizeY> <sizeZ> <numberBytesPerComponent> <numberOfComponents> <endian> <filename>","read a raw image data");
|
|
|
|
// construct the viewer.
|
|
osgViewer::Viewer viewer;
|
|
|
|
// if user request help write it out to cout.
|
|
if (arguments.read("-h") || arguments.read("--help"))
|
|
{
|
|
arguments.getApplicationUsage()->write(std::cout);
|
|
return 1;
|
|
}
|
|
|
|
std::string outputFile;
|
|
while (arguments.read("-o",outputFile)) {}
|
|
|
|
|
|
unsigned int numSlices=500;
|
|
while (arguments.read("-s",numSlices)) {}
|
|
|
|
|
|
float sliceEnd=1.0f;
|
|
while (arguments.read("--clip",sliceEnd)) {}
|
|
|
|
float alphaFunc=0.02f;
|
|
while (arguments.read("--alphaFunc",alphaFunc)) {}
|
|
|
|
|
|
bool createNormalMap = false;
|
|
while (arguments.read("-n")) createNormalMap=true;
|
|
|
|
float xSize=1.0f, ySize=1.0f, zSize=1.0f;
|
|
while (arguments.read("--xSize",xSize)) {}
|
|
while (arguments.read("--ySize",ySize)) {}
|
|
while (arguments.read("--zSize",zSize)) {}
|
|
|
|
float xMultiplier=1.0f, yMultiplier=1.0f, zMultiplier=1.0f;
|
|
while (arguments.read("--xMultiplier",xMultiplier)) {}
|
|
while (arguments.read("--yMultiplier",yMultiplier)) {}
|
|
while (arguments.read("--zMultiplier",zMultiplier)) {}
|
|
|
|
int s_maximumTextureSize = 256;
|
|
int t_maximumTextureSize = 256;
|
|
int r_maximumTextureSize = 256;
|
|
int maximumTextureSize = 256;
|
|
while(arguments.read("--maxTextureSize",maximumTextureSize))
|
|
{
|
|
s_maximumTextureSize = maximumTextureSize;
|
|
t_maximumTextureSize = maximumTextureSize;
|
|
r_maximumTextureSize = maximumTextureSize;
|
|
}
|
|
while(arguments.read("--s_maxTextureSize",s_maximumTextureSize)) {}
|
|
while(arguments.read("--t_maxTextureSize",t_maximumTextureSize)) {}
|
|
while(arguments.read("--r_maxTextureSize",r_maximumTextureSize)) {}
|
|
|
|
osg::Texture::InternalFormatMode internalFormatMode = osg::Texture::USE_IMAGE_DATA_FORMAT;
|
|
while(arguments.read("--compressed") || arguments.read("--compressed-arb")) { internalFormatMode = osg::Texture::USE_ARB_COMPRESSION; }
|
|
|
|
while(arguments.read("--compressed-dxt1")) { internalFormatMode = osg::Texture::USE_S3TC_DXT1_COMPRESSION; }
|
|
while(arguments.read("--compressed-dxt3")) { internalFormatMode = osg::Texture::USE_S3TC_DXT3_COMPRESSION; }
|
|
while(arguments.read("--compressed-dxt5")) { internalFormatMode = osg::Texture::USE_S3TC_DXT5_COMPRESSION; }
|
|
|
|
|
|
// set up colour space operation.
|
|
ColourSpaceOperation colourSpaceOperation = NO_COLOUR_SPACE_OPERATION;
|
|
osg::Vec4 colourModulate(0.25f,0.25f,0.25f,0.25f);
|
|
while(arguments.read("--modulate-alpha-by-luminance")) { colourSpaceOperation = MODULATE_ALPHA_BY_LUMINANCE; }
|
|
while(arguments.read("--modulate-alpha-by-colour", colourModulate.x(),colourModulate.y(),colourModulate.z(),colourModulate.w() )) { colourSpaceOperation = MODULATE_ALPHA_BY_COLOUR; }
|
|
while(arguments.read("--replace-alpha-with-luminance")) { colourSpaceOperation = REPLACE_ALPHA_WITH_LUMINACE; }
|
|
|
|
|
|
unsigned int numComponentsDesired = 0;
|
|
while(arguments.read("--num-components", numComponentsDesired)) {}
|
|
|
|
bool useShader = false;
|
|
while(arguments.read("--shader")) { useShader = true; }
|
|
|
|
osg::ref_ptr<osg::Image> image_3d;
|
|
|
|
int sizeX, sizeY, sizeZ, numberBytesPerComponent, numberOfComponents;
|
|
std::string endian, raw_filename;
|
|
while (arguments.read("--raw", sizeX, sizeY, sizeZ, numberBytesPerComponent, numberOfComponents, endian, raw_filename))
|
|
{
|
|
image_3d = readRaw(sizeX, sizeY, sizeZ, numberBytesPerComponent, numberOfComponents, endian, raw_filename);
|
|
}
|
|
|
|
while (arguments.read("--images"))
|
|
{
|
|
ImageList imageList;
|
|
for(int pos=1;pos<arguments.argc() && !arguments.isOption(pos);++pos)
|
|
{
|
|
// not an option so assume string is a filename.
|
|
osg::Image *image = osgDB::readImageFile( arguments[pos]);
|
|
|
|
if(image)
|
|
{
|
|
imageList.push_back(image);
|
|
}
|
|
}
|
|
|
|
// pack the textures into a single texture.
|
|
ProcessRow processRow;
|
|
image_3d = createTexture3D(imageList, processRow, numComponentsDesired, s_maximumTextureSize, t_maximumTextureSize, r_maximumTextureSize);
|
|
}
|
|
|
|
|
|
// any option left unread are converted into errors to write out later.
|
|
arguments.reportRemainingOptionsAsUnrecognized();
|
|
|
|
// report any errors if they have occurred when parsing the program arguments.
|
|
if (arguments.errors())
|
|
{
|
|
arguments.writeErrorMessages(std::cout);
|
|
return 1;
|
|
}
|
|
|
|
// assume remaining arguments are file names of textures.
|
|
for(int pos=1;pos<arguments.argc() && !image_3d;++pos)
|
|
{
|
|
if (!arguments.isOption(pos))
|
|
{
|
|
// not an option so assume string is a filename.
|
|
image_3d = osgDB::readImageFile( arguments[pos]);
|
|
}
|
|
}
|
|
|
|
if (!image_3d) return 0;
|
|
|
|
if (colourSpaceOperation!=NO_COLOUR_SPACE_OPERATION)
|
|
{
|
|
doColourSpaceConversion(colourSpaceOperation, image_3d.get(), colourModulate);
|
|
}
|
|
|
|
osg::ref_ptr<osg::Image> normalmap_3d = createNormalMap ? createNormalMapTexture(image_3d.get()) : 0;
|
|
|
|
|
|
|
|
// create a model from the images.
|
|
osg::Node* rootNode = 0;
|
|
|
|
if (useShader)
|
|
{
|
|
rootNode = createShaderModel(image_3d, normalmap_3d,
|
|
internalFormatMode,
|
|
xSize, ySize, zSize,
|
|
xMultiplier, yMultiplier, zMultiplier,
|
|
numSlices, sliceEnd, alphaFunc);
|
|
}
|
|
else
|
|
{
|
|
rootNode = createModel(image_3d, normalmap_3d,
|
|
internalFormatMode,
|
|
xSize, ySize, zSize,
|
|
xMultiplier, yMultiplier, zMultiplier,
|
|
numSlices, sliceEnd, alphaFunc);
|
|
}
|
|
|
|
if (!outputFile.empty())
|
|
{
|
|
std::string ext = osgDB::getFileExtension(outputFile);
|
|
std::string name_no_ext = osgDB::getNameLessExtension(outputFile);
|
|
if (ext=="osg")
|
|
{
|
|
if (image_3d.valid())
|
|
{
|
|
image_3d->setFileName(name_no_ext + ".dds");
|
|
osgDB::writeImageFile(*image_3d, image_3d->getFileName());
|
|
}
|
|
if (normalmap_3d.valid())
|
|
{
|
|
normalmap_3d->setFileName(name_no_ext + "_normalmap.dds");
|
|
osgDB::writeImageFile(*normalmap_3d, normalmap_3d->getFileName());
|
|
}
|
|
|
|
osgDB::writeNodeFile(*rootNode, outputFile);
|
|
}
|
|
else if (ext=="ive")
|
|
{
|
|
osgDB::writeNodeFile(*rootNode, outputFile);
|
|
}
|
|
else if (ext=="dds")
|
|
{
|
|
osgDB::writeImageFile(*image_3d, outputFile);
|
|
}
|
|
else
|
|
{
|
|
std::cout<<"Extension not support for file output, not file written."<<std::endl;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
if (rootNode)
|
|
{
|
|
|
|
// set the scene to render
|
|
viewer.setSceneData(rootNode);
|
|
|
|
// the the viewers main frame loop
|
|
viewer.run();
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|