FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

From Anders Backman, added bias and texture size methods.

Browse Source 
From Robert Osfield, tweaks to the above for method parameters and indenting.
This commit is contained in:
Robert Osfield 2007-09-20 10:12:58 +00:00
parent 5fb9673382
commit 55a9ea19d7
2 changed files with 76 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
include/osgShadow/SoftShadowMap
View File

@ -40,6 +40,27 @@ class OSGSHADOW_EXPORT SoftShadowMap : public ShadowTechnique
/** Set the values for the ambient bias the shader will use.*/
void setAmbientBias(const osg::Vec2& ambientBias );
/** Set the resolution of the rendertarget texture used for shadow generation */
void setTextureSize(int width, int height) { setTextureSize(osg::Vec2s(width, height)); }
/** Set the resolution of the rendertarget texture used for shadow generation */
void setTextureSize(const osg::Vec2s&);
/** Get the resolution of the rendertarget texture used for shadow generation */
const osg::Vec2s& getTextureSize() const { return _textureSize; }
/** Add a small bias to the z-value when calculating the MVPT matrix, this can reduce
* shadow acne problem.
* Suitable values are 0-0.005
* Default is 0. */
void setBias(float bias) { _bias = bias; }
/** Return the bias value set used when calculating the MVPT matrix */
float getBias() const { return _bias; }
/** Set the values for width of the soft penumbra the shader will use.
* Zero is for hard shadow (no penumbra). 0.01 is already very soft penumbra.
* Default is 0.005.*/
@ -87,6 +108,9 @@ class OSGSHADOW_EXPORT SoftShadowMap : public ShadowTechnique
osg::Vec2 _ambientBias;
float _softnesswidth;
float _jitteringscale;
float _bias;
osg::Vec2s _textureSize;
};
}

28
src/osgShadow/SoftShadowMap.cpp
View File

@ -157,7 +157,9 @@ SoftShadowMap::SoftShadowMap():
_textureUnit(1),
_ambientBias(0.5f,0.5f),
_softnesswidth(0.005f),
_jitteringscale(32.f)
_jitteringscale(32.f),
_bias(0.0f),
_textureSize(1024, 1024)
{
}
@ -166,7 +168,9 @@ SoftShadowMap::SoftShadowMap(const SoftShadowMap& copy, const osg::CopyOp& copyo
_textureUnit(copy._textureUnit),
_ambientBias(copy._ambientBias),
_softnesswidth(copy._softnesswidth),
_jitteringscale(copy._jitteringscale)
_jitteringscale(copy._jitteringscale),
_bias(copy._bias),
_textureSize(copy._textureSize)
{
}
@ -190,16 +194,24 @@ void SoftShadowMap::setJitteringScale(const float jitteringscale )
_jitteringscale = jitteringscale;
}
void SoftShadowMap::setTextureSize(const osg::Vec2s& texsize)
{
_textureSize = texsize;
if (_texture.valid())
{
_texture->setTextureSize(_textureSize[0], _textureSize[1]);
_camera->setViewport(0,0,_textureSize[0], _textureSize[1]);
}
}
void SoftShadowMap::init()
{
if (!_shadowedScene) return;
unsigned int tex_width = 1024;
unsigned int tex_height = 1024;
_texture = new osg::Texture2D;
_texture->setTextureSize(tex_width, tex_height);
_texture->setTextureSize(_textureSize[0], _textureSize[1]);
_texture->setInternalFormat(GL_DEPTH_COMPONENT);
_texture->setSourceType(GL_UNSIGNED_INT);
@ -228,7 +240,7 @@ void SoftShadowMap::init()
_camera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
// set viewport
_camera->setViewport(0,0,tex_width,tex_height);
_camera->setViewport(0,0,_textureSize[0],_textureSize[1]);
// set the camera to render before the main camera.
_camera->setRenderOrder(osg::Camera::PRE_RENDER);
@ -410,7 +422,7 @@ void SoftShadowMap::cull(osgUtil::CullVisitor& cv)
osg::Matrix MVPT = _camera->getViewMatrix() *
_camera->getProjectionMatrix() *
osg::Matrix::translate(1.0,1.0,1.0) *
osg::Matrix::scale(0.5f,0.5f,0.5f);
osg::Matrix::scale(0.5,0.5,0.5+_bias);
_texgen->setMode(osg::TexGen::EYE_LINEAR);
_texgen->setPlanesFromMatrix(MVPT);