FGFS-4.1/OpenSceneGraph
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Moved distortion mesh creation out into seperate function

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This commit is contained in:
Robert Osfield 2007-02-22 11:17:45 +00:00
parent 03c198da4d
commit df0de03798
1 changed files with 81 additions and 109 deletions
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190
examples/osgdistortion/osgdistortion.cpp
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@ -87,7 +87,6 @@ osg::Node* createDistortionSubgraph(osg::Node* subgraph, const osg::Vec4& clearC
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);
osg::Vec3 zAxis(0.0f,0.0f,1.0f);
float height = 1024.0f;
float width = 1280.0f;
int noSteps = 50;
@ -284,7 +283,76 @@ void setDomeFaces(osgViewer::Viewer& viewer, osg::ArgumentParser& /*arguments*/)
viewer.assignSceneDataToCameras();
}
void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& /*arguments*/)
osg::Geometry* createDomeDistortionMesh(const osg::Vec3& origin, const osg::Vec3& widthVector, const osg::Vec3& heightVector, osg::ArgumentParser& arguments)
{
// 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::Vec3 bottom_texcoord(0.0f,0.0f,0.0f);
osg::Vec3 dx_texcoord(1.0f/(float)(noSteps-1),0.0f,0.0f);
osg::Vec3 dy_texcoord(0.0f,1.0f/(float)(noSteps-1),0.0f);
osg::Vec3 cursor = bottom;
osg::Vec3 texcoord = bottom_texcoord;
int i,j;
for(i=0;i<noSteps;++i)
{
osg::Vec3 cursor = bottom+dy*(float)i;
osg::Vec3 texcoord = bottom_texcoord+dy_texcoord*(float)i;
for(j=0;j<noSteps;++j)
{
vertices->push_back(cursor);
texcoords->push_back(osg::Vec3((sin(texcoord.x()*osg::PI-osg::PI*0.5)+1.0f)*0.5f,(1.0-sin(texcoord.y()*osg::PI-osg::PI*0.5))*0.5f,1.0));
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.
geometry->setVertexArray(vertices);
geometry->setColorArray(colors);
geometry->setColorBinding(osg::Geometry::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, osg::ArgumentParser& arguments)
{
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
@ -313,29 +381,16 @@ void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& /*argumen
return;
}
gc->setClearColor(osg::Vec4f(0.2f,0.2f,0.6f,1.0f));
gc->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
int center_x = width/2;
int center_y = height/2;
int camera_width = 512;
int camera_height = 512;
int tex_width = 512;
int tex_height = 512;
#define CUBE_MAP
#ifdef CUBE_MAP
int camera_width = tex_width;
int camera_height = tex_height;
osg::TextureCubeMap* texture = new osg::TextureCubeMap;
#else
osg::Texture2D* texture = new osg::Texture2D;
#endif
texture->setTextureSize(tex_width, tex_height);
texture->setInternalFormat(GL_RGB);
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);
texture->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR);
texture->setFilter(osg::Texture::MAG_FILTER,osg::Texture::LINEAR);
@ -360,11 +415,8 @@ void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& /*argumen
camera->setRenderTargetImplementation(renderTargetImplementation);
// attach the texture and use it as the color buffer.
#ifdef CUBE_MAP
camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::POSITIVE_Z);
#else
camera->attach(osg::Camera::COLOR_BUFFER, texture);
#endif
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd());
}
@ -407,11 +459,7 @@ void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& /*argumen
camera->setRenderTargetImplementation(renderTargetImplementation);
// attach the texture and use it as the color buffer.
#ifdef CUBE_MAP
camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_X);
#else
camera->attach(osg::Camera::COLOR_BUFFER, texture);
#endif
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-90.0f), 0.0,1.0,0.0));
}
@ -430,11 +478,7 @@ void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& /*argumen
camera->setRenderTargetImplementation(renderTargetImplementation);
// attach the texture and use it as the color buffer.
#ifdef CUBE_MAP
camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_X);
#else
camera->attach(osg::Camera::COLOR_BUFFER, texture);
#endif
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(90.0f), 0.0,1.0,0.0));
}
@ -453,11 +497,7 @@ void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& /*argumen
camera->setRenderTargetImplementation(renderTargetImplementation);
// attach the texture and use it as the color buffer.
#ifdef CUBE_MAP
camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_Y);
#else
camera->attach(osg::Camera::COLOR_BUFFER, texture);
#endif
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(90.0f), 1.0,0.0,0.0));
}
@ -476,11 +516,7 @@ void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& /*argumen
camera->setRenderTargetImplementation(renderTargetImplementation);
// attach the texture and use it as the color buffer.
#ifdef CUBE_MAP
camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_Z);
#else
camera->attach(osg::Camera::COLOR_BUFFER, texture);
#endif
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-180.0f), 1.0,0.0,0.0));
}
@ -493,79 +529,15 @@ void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& /*argumen
// distortion correction set up.
{
// create the quad to visualize.
osg::Geometry* polyGeom = new osg::Geometry();
osg::Geode* geode = new osg::Geode();
geode->addDrawable(createDomeDistortionMesh(osg::Vec3(0.0f,0.0f,0.0f), osg::Vec3(width,0.0f,0.0f), osg::Vec3(0.0f,height,0.0f), arguments));
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);
osg::Vec3 zAxis(0.0f,0.0f,1.0f);
float height = 1024.0f;
float width = 1280.0f;
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::Vec3 bottom_texcoord(0.0f,0.0f,0.0f);
osg::Vec3 dx_texcoord(1.0f/(float)(noSteps-1),0.0f,0.0f);
osg::Vec3 dy_texcoord(0.0f,1.0f/(float)(noSteps-1),0.0f);
osg::Vec3 cursor = bottom;
osg::Vec3 texcoord = bottom_texcoord;
int i,j;
for(i=0;i<noSteps;++i)
{
osg::Vec3 cursor = bottom+dy*(float)i;
osg::Vec3 texcoord = bottom_texcoord+dy_texcoord*(float)i;
for(j=0;j<noSteps;++j)
{
vertices->push_back(cursor);
texcoords->push_back(osg::Vec3((sin(texcoord.x()*osg::PI-osg::PI*0.5)+1.0f)*0.5f,(1.0-sin(texcoord.y()*osg::PI-osg::PI*0.5))*0.5f,1.0));
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);
polyGeom->setColorBinding(osg::Geometry::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
// 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 = polyGeom->getOrCreateStateSet();
osg::StateSet* stateset = geode->getOrCreateStateSet();
stateset->setTextureAttributeAndModes(0, texture,osg::StateAttribute::ON);
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
osg::Geode* geode = new osg::Geode();
geode->addDrawable(polyGeom);
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
@ -579,7 +551,7 @@ void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& /*argumen
//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(0,1280,0,1024);
camera->setProjectionMatrixAsOrtho2D(0,width,0,height);
camera->setViewMatrix(osg::Matrix::identity());
// add subgraph to render
@ -656,7 +628,7 @@ int main(int argc, char** argv)
viewer.setCameraManipulator( keyswitchManipulator.get() );
}
viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
// viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
// add the state manipulator
viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );