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OpenSceneGraph/examples/osgdistortion/osgdistortion.cpp

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/* OpenSceneGraph example, osgdistortion.
*
* 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/GLExtensions>
#include <osg/Node>
#include <osg/Geometry>
#include <osg/Notify>
#include <osg/MatrixTransform>
#include <osg/Texture2D>
#include <osg/Stencil>
#include <osg/ColorMask>
#include <osg/Depth>
#include <osg/Billboard>
#include <osg/Material>
#include <osg/Projection>
#include <osg/TextureCubeMap>
#include <osg/io_utils>
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/DriveManipulator>
#include <osgGA/KeySwitchMatrixManipulator>
#include <osgGA/StateSetManipulator>
#include <osgGA/AnimationPathManipulator>
#include <osgGA/TerrainManipulator>
#include <osgUtil/SmoothingVisitor>
#include <osgDB/Registry>
#include <osgDB/ReadFile>
#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>
#include <iostream>
using namespace osg;
struct CommandLineOptions
{
unsigned int width;
unsigned int height;
unsigned int tex_width;
unsigned int tex_height;
double sphere_radius;
double collar_radius;
double distance;
CommandLineOptions():
width(1024),
height(1024),
tex_width(1024),
tex_height(1024),
sphere_radius(1.0),
collar_radius(0.45),
distance(1.0)
{
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
if (!wsi)
{
osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
return;
}
unsigned int width, height;
wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), width, height);
distance = sqrt(sphere_radius*sphere_radius - collar_radius*collar_radius);
}
void read(osg::ArgumentParser& arguments)
{
while (arguments.read("--width",width)) {}
while (arguments.read("--height",height)) {}
while (arguments.read("--texture-width",tex_width) || arguments.read("--tx",tex_width) ) {}
while (arguments.read("--texture-height",tex_height) || arguments.read("--ty",tex_height) ) {}
while (arguments.read("--radius", sphere_radius)) {}
while (arguments.read("--collar", collar_radius)) {}
distance = sqrt(sphere_radius*sphere_radius - collar_radius*collar_radius);
while (arguments.read("--distance", distance)) {}
}
};
class WindowResizedHandler : public osgGA::GUIEventHandler
{
public:
WindowResizedHandler()
{
}
virtual bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa, osg::Object* object, osg::NodeVisitor* nv)
{
osg::Camera* camera = dynamic_cast<osg::Camera*>(object);
if (!camera) return false;
const osg::FrameStamp* fs = nv->getFrameStamp();
if (ea.getEventType()==osgGA::GUIEventAdapter::RESIZE)
{
OSG_NOTICE<<"Window resized event context="<<ea.getGraphicsContext()<<" frameNumber = "<<fs->getFrameNumber()<<std::endl;
OSG_NOTICE<<" WindowX="<<ea.getWindowX()<<std::endl;
OSG_NOTICE<<" WindowY="<<ea.getWindowY()<<std::endl;
OSG_NOTICE<<" WindowWidth="<<ea.getWindowWidth()<<std::endl;
OSG_NOTICE<<" WindowHeight="<<ea.getWindowHeight()<<std::endl;
// reset the Camera and associated Texture's to make sure it tracks the new window size.
int width = ea.getWindowWidth();
int height = ea.getWindowHeight();
camera->setViewport(0, 0, width, height);
camera->setRenderingCache(0);
osg::Camera::BufferAttachmentMap& cbam = camera->getBufferAttachmentMap();
for(osg::Camera::BufferAttachmentMap::iterator itr = cbam.begin();
itr != cbam.end();
++itr)
{
osg::Camera::Attachment& attachment = itr->second;
if (attachment._texture.get())
{
osg::Texture2D* texture2D = dynamic_cast<osg::Texture2D*>(attachment._texture.get());
if (texture2D)
{
OSG_NOTICE<<"Resetting Texture size"<<std::endl;
texture2D->setTextureSize(width, height);
texture2D->dirtyTextureObject();
}
}
}
}
return false;
}
};
osg::Node* createDistortionSubgraph(CommandLineOptions& options, osg::Node* subgraph, const osg::Vec4& clearColour)
{
osg::Group* distortionNode = new osg::Group;
osg::Texture2D* texture = new osg::Texture2D;
texture->setTextureSize(options.tex_width, options.tex_height);
texture->setInternalFormat(GL_RGBA);
texture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
texture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
texture->setWrap(osg::Texture2D::WRAP_S, osg::Texture2D::CLAMP_TO_EDGE);
texture->setWrap(osg::Texture2D::WRAP_T, osg::Texture2D::CLAMP_TO_EDGE);
// set up the render to texture camera.
{
osg::Camera* camera = new osg::Camera;
// set clear the color and depth buffer
camera->setClearColor(clearColour);
camera->setClearMask(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
// just inherit the main cameras view
camera->setReferenceFrame(osg::Transform::RELATIVE_RF);
camera->setProjectionMatrix(osg::Matrixd::identity());
camera->setViewMatrix(osg::Matrixd::identity());
// set viewport
camera->setViewport(0,0,options.tex_width,options.tex_height);
// set the camera to render before the main camera.
camera->setRenderOrder(osg::Camera::PRE_RENDER);
// tell the camera to use OpenGL frame buffer object where supported.
camera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT);
// attach the texture and use it as the color buffer.
camera->attach(osg::Camera::COLOR_BUFFER, texture);
// add subgraph to render
camera->addChild(subgraph);
distortionNode->addChild(camera);
camera->addEventCallback(new WindowResizedHandler());
}
// set up the hud camera
{
// create the quad to visualize.
osg::Geometry* polyGeom = new osg::Geometry();
polyGeom->setSupportsDisplayList(false);
osg::Vec3 origin(0.0f,0.0f,0.0f);
osg::Vec3 xAxis(1.0f,0.0f,0.0f);
osg::Vec3 yAxis(0.0f,1.0f,0.0f);
float height = 1024.0f;
float width = 1280.0f;
int noSteps = 50;
osg::Vec3Array* vertices = new osg::Vec3Array;
osg::Vec2Array* texcoords = new osg::Vec2Array;
osg::Vec4Array* colors = new osg::Vec4Array;
osg::Vec3 bottom = origin;
osg::Vec3 dx = xAxis*(width/((float)(noSteps-1)));
osg::Vec3 dy = yAxis*(height/((float)(noSteps-1)));
osg::Vec2 bottom_texcoord(0.0f,0.0f);
osg::Vec2 dx_texcoord(1.0f/(float)(noSteps-1),0.0f);
osg::Vec2 dy_texcoord(0.0f,1.0f/(float)(noSteps-1));
int i,j;
for(i=0;i<noSteps;++i)
{
osg::Vec3 cursor = bottom+dy*(float)i;
osg::Vec2 texcoord = bottom_texcoord+dy_texcoord*(float)i;
for(j=0;j<noSteps;++j)
{
vertices->push_back(cursor);
texcoords->push_back(osg::Vec2((sin(texcoord.x()*osg::PI-osg::PI*0.5)+1.0f)*0.5f,(sin(texcoord.y()*osg::PI-osg::PI*0.5)+1.0f)*0.5f));
colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
cursor += dx;
texcoord += dx_texcoord;
}
}
// pass the created vertex array to the points geometry object.
polyGeom->setVertexArray(vertices);
polyGeom->setColorArray(colors, osg::Array::BIND_PER_VERTEX);
polyGeom->setTexCoordArray(0,texcoords);
for(i=0;i<noSteps-1;++i)
{
osg::DrawElementsUShort* elements = new osg::DrawElementsUShort(osg::PrimitiveSet::QUAD_STRIP);
for(j=0;j<noSteps;++j)
{
elements->push_back(j+(i+1)*noSteps);
elements->push_back(j+(i)*noSteps);
}
polyGeom->addPrimitiveSet(elements);
}
// new we need to add the texture to the Drawable, we do so by creating a
// StateSet to contain the Texture StateAttribute.
osg::StateSet* stateset = polyGeom->getOrCreateStateSet();
stateset->setTextureAttributeAndModes(0, texture,osg::StateAttribute::ON);
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
osg::Geode* geode = new osg::Geode();
geode->addDrawable(polyGeom);
// set up the camera to render the textured quad
osg::Camera* camera = new osg::Camera;
// just inherit the main cameras view
camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
camera->setViewMatrix(osg::Matrix::identity());
camera->setProjectionMatrixAsOrtho2D(0,1280,0,1024);
// set the camera to render before the main camera.
camera->setRenderOrder(osg::Camera::NESTED_RENDER);
// add subgraph to render
camera->addChild(geode);
distortionNode->addChild(camera);
}
return distortionNode;
}
void setDomeFaces(osgViewer::Viewer& viewer, CommandLineOptions& options)
{
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->x = 0;
traits->y = 0;
traits->width = options.width;
traits->height = options.height;
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
if (!gc)
{
osg::notify(osg::NOTICE)<<"GraphicsWindow has not been created successfully."<<std::endl;
return;
}
int center_x = options.width/2;
int center_y = options.height/2;
int camera_width = 256;
int camera_height = 256;
// front face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(center_x-camera_width/2, center_y, camera_width, camera_height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd());
}
// top face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(center_x-camera_width/2, center_y+camera_height, camera_width, camera_height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-90.0f), 1.0,0.0,0.0));
}
// left face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(center_x-camera_width*3/2, center_y, camera_width, camera_height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-90.0f), 0.0,1.0,0.0));
}
// right face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(center_x+camera_width/2, center_y, camera_width, camera_height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(90.0f), 0.0,1.0,0.0));
}
// bottom face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(center_x-camera_width/2, center_y-camera_height, camera_width, camera_height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(90.0f), 1.0,0.0,0.0));
}
// back face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(center_x-camera_width/2, center_y-2*camera_height, camera_width, camera_height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-180.0f), 1.0,0.0,0.0));
}
viewer.getCamera()->setProjectionMatrixAsPerspective(90.0f, 1.0, 1, 1000.0);
viewer.assignSceneDataToCameras();
}
osg::Geometry* createDomeDistortionMesh(const osg::Vec3& origin, const osg::Vec3& widthVector, const osg::Vec3& heightVector,
CommandLineOptions& options)
{
osg::Vec3d center(0.0,0.0,0.0);
osg::Vec3d eye(0.0,0.0,0.0);
bool centerProjection = false;
osg::Vec3d projector = eye - osg::Vec3d(0.0,0.0, options.distance);
osg::notify(osg::NOTICE)<<"Projector position = "<<projector<<std::endl;
osg::notify(osg::NOTICE)<<"distance = "<<options.distance<<std::endl;
// create the quad to visualize.
osg::Geometry* geometry = new osg::Geometry();
geometry->setSupportsDisplayList(false);
osg::Vec3 xAxis(widthVector);
float width = widthVector.length();
xAxis /= width;
osg::Vec3 yAxis(heightVector);
float height = heightVector.length();
yAxis /= height;
int noSteps = 50;
osg::Vec3Array* vertices = new osg::Vec3Array;
osg::Vec3Array* texcoords = new osg::Vec3Array;
osg::Vec4Array* colors = new osg::Vec4Array;
osg::Vec3 bottom = origin;
osg::Vec3 dx = xAxis*(width/((float)(noSteps-1)));
osg::Vec3 dy = yAxis*(height/((float)(noSteps-1)));
osg::Vec3d screenCenter = origin + widthVector*0.5f + heightVector*0.5f;
float screenRadius = heightVector.length() * 0.5f;
int i,j;
if (centerProjection)
{
for(i=0;i<noSteps;++i)
{
osg::Vec3 cursor = bottom+dy*(float)i;
for(j=0;j<noSteps;++j)
{
osg::Vec2 delta(cursor.x() - screenCenter.x(), cursor.y() - screenCenter.y());
double theta = atan2(-delta.y(), delta.x());
double phi = osg::PI_2 * delta.length() / screenRadius;
if (phi > osg::PI_2) phi = osg::PI_2;
phi *= 2.0;
// osg::notify(osg::NOTICE)<<"theta = "<<theta<< "phi="<<phi<<std::endl;
osg::Vec3 texcoord(sin(phi) * cos(theta),
sin(phi) * sin(theta),
cos(phi));
vertices->push_back(cursor);
colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
texcoords->push_back(texcoord);
cursor += dx;
}
// osg::notify(osg::NOTICE)<<std::endl;
}
}
else
{
for(i=0;i<noSteps;++i)
{
osg::Vec3 cursor = bottom+dy*(float)i;
for(j=0;j<noSteps;++j)
{
osg::Vec2 delta(cursor.x() - screenCenter.x(), cursor.y() - screenCenter.y());
double theta = atan2(-delta.y(), delta.x());
double phi = osg::PI_2 * delta.length() / screenRadius;
if (phi > osg::PI_2) phi = osg::PI_2;
// osg::notify(osg::NOTICE)<<"theta = "<<theta<< "phi="<<phi<<std::endl;
double f = options.distance * sin(phi);
double e = options.distance * cos(phi) + sqrt( options.sphere_radius*options.sphere_radius - f*f);
double l = e * cos(phi);
double h = e * sin(phi);
double z = l - options.distance;
osg::Vec3 texcoord(h * cos(theta) / options.sphere_radius,
h * sin(theta) / options.sphere_radius,
z / options.sphere_radius);
vertices->push_back(cursor);
colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
texcoords->push_back(texcoord);
cursor += dx;
}
// osg::notify(osg::NOTICE)<<std::endl;
}
}
// pass the created vertex array to the points geometry object.
geometry->setVertexArray(vertices);
geometry->setColorArray(colors, osg::Array::BIND_PER_VERTEX);
geometry->setTexCoordArray(0,texcoords);
for(i=0;i<noSteps-1;++i)
{
osg::DrawElementsUShort* elements = new osg::DrawElementsUShort(osg::PrimitiveSet::QUAD_STRIP);
for(j=0;j<noSteps;++j)
{
elements->push_back(j+(i+1)*noSteps);
elements->push_back(j+(i)*noSteps);
}
geometry->addPrimitiveSet(elements);
}
return geometry;
}
void setDomeCorrection(osgViewer::Viewer& viewer, CommandLineOptions& options)
{
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->x = 0;
traits->y = 0;
traits->width = options.width;
traits->height = options.height;
traits->windowDecoration = false;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
if (!gc)
{
osg::notify(osg::NOTICE)<<"GraphicsWindow has not been created successfully."<<std::endl;
return;
}
int camera_width = options.tex_width;
int camera_height = options.tex_height;
osg::TextureCubeMap* texture = new osg::TextureCubeMap;
texture->setTextureSize(options.tex_width, options.tex_height);
texture->setInternalFormat(GL_RGB);
texture->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR);
texture->setFilter(osg::Texture::MAG_FILTER,osg::Texture::LINEAR);
texture->setWrap(osg::Texture::WRAP_S,osg::Texture::CLAMP_TO_EDGE);
texture->setWrap(osg::Texture::WRAP_T,osg::Texture::CLAMP_TO_EDGE);
texture->setWrap(osg::Texture::WRAP_R,osg::Texture::CLAMP_TO_EDGE);
#if 0
osg::Camera::RenderTargetImplementation renderTargetImplementation = osg::Camera::SEPERATE_WINDOW;
GLenum buffer = GL_FRONT;
#else
osg::Camera::RenderTargetImplementation renderTargetImplementation = osg::Camera::FRAME_BUFFER_OBJECT;
GLenum buffer = GL_FRONT;
#endif
// front face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setName("Front face camera");
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(0,0,camera_width, camera_height));
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
camera->setAllowEventFocus(false);
// tell the camera to use OpenGL frame buffer object where supported.
camera->setRenderTargetImplementation(renderTargetImplementation);
// attach the texture and use it as the color buffer.
camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::POSITIVE_Y);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd());
}
// top face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setName("Top face camera");
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(0,0,camera_width, camera_height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
camera->setAllowEventFocus(false);
// tell the camera to use OpenGL frame buffer object where supported.
camera->setRenderTargetImplementation(renderTargetImplementation);
// attach the texture and use it as the color buffer.
camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::POSITIVE_Z);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-90.0f), 1.0,0.0,0.0));
}
// left face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setName("Left face camera");
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(0,0,camera_width, camera_height));
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
camera->setAllowEventFocus(false);
// tell the camera to use OpenGL frame buffer object where supported.
camera->setRenderTargetImplementation(renderTargetImplementation);
// attach the texture and use it as the color buffer.
camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_X);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-90.0f), 0.0,1.0,0.0) * osg::Matrixd::rotate(osg::inDegrees(-90.0f), 0.0,0.0,1.0));
}
// right face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setName("Right face camera");
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(0,0,camera_width, camera_height));
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
camera->setAllowEventFocus(false);
// tell the camera to use OpenGL frame buffer object where supported.
camera->setRenderTargetImplementation(renderTargetImplementation);
// attach the texture and use it as the color buffer.
camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::POSITIVE_X);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(90.0f), 0.0,1.0,0.0 ) * osg::Matrixd::rotate(osg::inDegrees(90.0f), 0.0,0.0,1.0));
}
// bottom face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setName("Bottom face camera");
camera->setViewport(new osg::Viewport(0,0,camera_width, camera_height));
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
camera->setAllowEventFocus(false);
// tell the camera to use OpenGL frame buffer object where supported.
camera->setRenderTargetImplementation(renderTargetImplementation);
// attach the texture and use it as the color buffer.
camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_Z);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(90.0f), 1.0,0.0,0.0) * osg::Matrixd::rotate(osg::inDegrees(180.0f), 0.0,0.0,1.0));
}
// back face
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setName("Back face camera");
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(0,0,camera_width, camera_height));
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
camera->setAllowEventFocus(false);
// tell the camera to use OpenGL frame buffer object where supported.
camera->setRenderTargetImplementation(renderTargetImplementation);
// attach the texture and use it as the color buffer.
camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_Y);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(180.0f), 1.0,0.0,0.0));
}
viewer.getCamera()->setProjectionMatrixAsPerspective(90.0f, 1.0, 1, 1000.0);
// distortion correction set up.
{
osg::Geode* geode = new osg::Geode();
geode->addDrawable(createDomeDistortionMesh(osg::Vec3(0.0f,0.0f,0.0f), osg::Vec3(options.width,0.0f,0.0f), osg::Vec3(0.0f,options.height,0.0f), options));
// new we need to add the texture to the mesh, we do so by creating a
// StateSet to contain the Texture StateAttribute.
osg::StateSet* stateset = geode->getOrCreateStateSet();
stateset->setTextureAttributeAndModes(0, texture,osg::StateAttribute::ON);
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
camera->setClearColor( osg::Vec4(0.1,0.1,1.0,1.0) );
camera->setViewport(new osg::Viewport(0, 0, options.width, options.height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
camera->setReferenceFrame(osg::Camera::ABSOLUTE_RF);
camera->setAllowEventFocus(false);
//camera->setInheritanceMask(camera->getInheritanceMask() & ~osg::CullSettings::CLEAR_COLOR & ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE);
//camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
camera->setProjectionMatrixAsOrtho2D(0,options.width,0,options.height);
camera->setViewMatrix(osg::Matrix::identity());
// add subgraph to render
camera->addChild(geode);
camera->setName("DistortionCorrectionCamera");
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd(), false);
}
viewer.getCamera()->setNearFarRatio(0.0001f);
}
int main(int argc, char** argv)
{
// use an ArgumentParser object to manage the program arguments.
osg::ArgumentParser arguments(&argc,argv);
CommandLineOptions options;
options.read(arguments);
// construct the viewer.
osgViewer::Viewer viewer(arguments);
// load the nodes from the commandline arguments.
osg::Node* loadedModel = osgDB::readNodeFiles(arguments);
// if not loaded assume no arguments passed in, try use default mode instead.
if (!loadedModel) loadedModel = osgDB::readNodeFile("cow.osgt");
if (!loadedModel)
{
std::cout << arguments.getApplicationName() <<": No data loaded" << std::endl;
return 1;
}
if (arguments.read("--dome") || arguments.read("--puffer") )
{
setDomeCorrection(viewer, options);
viewer.setSceneData( loadedModel );
}
else if (arguments.read("--faces"))
{
setDomeFaces(viewer, options);
viewer.setSceneData( loadedModel );
}
else
{
osg::Node* distortionNode = createDistortionSubgraph( options, loadedModel, viewer.getCamera()->getClearColor());
viewer.setSceneData( distortionNode );
}
while (arguments.read("--sky-light"))
{
viewer.setLightingMode(osg::View::SKY_LIGHT);
}
if (viewer.getLightingMode()==osg::View::HEADLIGHT)
{
viewer.getLight()->setPosition(osg::Vec4(0.0f,0.0f,0.0f,1.0f));
}
// load the nodes from the commandline arguments.
if (!viewer.getSceneData())
{
osg::notify(osg::NOTICE)<<"Please specify a model filename on the command line."<<std::endl;
return 1;
}
// set up the camera manipulators.
{
osg::ref_ptr<osgGA::KeySwitchMatrixManipulator> keyswitchManipulator = new osgGA::KeySwitchMatrixManipulator;
keyswitchManipulator->addMatrixManipulator( '1', "Trackball", new osgGA::TrackballManipulator() );
keyswitchManipulator->addMatrixManipulator( '2', "Flight", new osgGA::FlightManipulator() );
keyswitchManipulator->addMatrixManipulator( '3', "Drive", new osgGA::DriveManipulator() );
keyswitchManipulator->addMatrixManipulator( '4', "Terrain", new osgGA::TerrainManipulator() );
std::string pathfile;
char keyForAnimationPath = '5';
while (arguments.read("-p",pathfile))
{
osgGA::AnimationPathManipulator* apm = new osgGA::AnimationPathManipulator(pathfile);
if (apm || !apm->valid())
{
unsigned int num = keyswitchManipulator->getNumMatrixManipulators();
keyswitchManipulator->addMatrixManipulator( keyForAnimationPath, "Path", apm );
keyswitchManipulator->selectMatrixManipulator(num);
++keyForAnimationPath;
}
}
viewer.setCameraManipulator( keyswitchManipulator.get() );
}
viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
// add window resize handler
viewer.addEventHandler(new osgViewer::WindowSizeHandler);
// add the state manipulator
viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
// add the stats handler
viewer.addEventHandler(new osgViewer::StatsHandler);
return viewer.run();
}
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