FGFS-4.1/OpenSceneGraph
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From Mahai Radu, improvements to handling of spotlights

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This commit is contained in:
Robert Osfield
2007-10-03 12:48:23 +00:00
parent c40f395e22
commit b3ecb8f38f
2 changed files with 56 additions and 9 deletions
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59
src/osgShadow/ShadowMap.cpp
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@@ -55,6 +55,29 @@ using namespace osgShadow;
" gl_FragColor = color * (osgShadow_ambientBias.x + shadow2DProj( osgShadow_shadowTexture, gl_TexCoord[1] ) * osgShadow_ambientBias.y); \n"
"}\n";
//////////////////////////////////////////////////////////////////
// fragment shader
//
static const char fragmentShaderSource_debugHUD_texcoord[] =
"uniform sampler2D osgShadow_shadowTexture; \n"
" \n"
"void main(void) \n"
"{ \n"
" vec4 texCoord = gl_TexCoord[1].xyzw; \n"
" float value = texCoord.z / texCoord.w; \n"
" gl_FragColor = vec4( value, value, value, 1.0 ); \n"
"} \n";
static const char fragmentShaderSource_debugHUD[] =
"uniform sampler2D osgShadow_shadowTexture; \n"
" \n"
"void main(void) \n"
"{ \n"
" vec4 texResult = texture2D(osgShadow_shadowTexture, gl_TexCoord[0].st ); \n"
" float value = texResult.g - 0.5; \n"
" gl_FragColor = vec4( value, value, value, 0.8 ); \n"
"} \n";
ShadowMap::ShadowMap():
_baseTextureUnit(0),
_shadowTextureUnit(1),
@@ -145,8 +168,11 @@ using namespace osgShadow;
_texture->setShadowTextureMode(osg::Texture2D::LUMINANCE);
_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);
// the shadow comparison should fail if object is outside the texture
_texture->setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::CLAMP_TO_BORDER);
_texture->setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::CLAMP_TO_BORDER);
_texture->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
// set up the render to texture camera.
{
@@ -369,6 +395,8 @@ using namespace osgShadow;
_camera->setViewMatrixAsLookAt(position,bb.center(),osg::Vec3(0.0f,1.0f,0.0f));
}
}
// compute the matrix which takes a vertex from local coords into tex coords
// will use this later to specify osg::TexGen..
osg::Matrix MVPT = _camera->getViewMatrix() *
@@ -378,8 +406,6 @@ using namespace osgShadow;
_texgen->setMode(osg::TexGen::EYE_LINEAR);
_texgen->setPlanesFromMatrix(MVPT);
}
cv.setTraversalMask( traversalMask &
getShadowedScene()->getCastsShadowTraversalMask() );
@@ -461,10 +487,31 @@ using namespace osgShadow;
//stateset->setAttribute(new osg::PolygonOffset(1.0f,1.0f),osg::StateAttribute::ON);
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
// test with regular texture
//stateset->setTextureAttributeAndModes(_baseTextureUnit, new osg::Texture2D(osgDB::readImageFile("Images/lz.rgb")));
stateset->setTextureAttributeAndModes(_baseTextureUnit,_texture.get(),osg::StateAttribute::ON);
//TODO might need to have a shader for correct display
stateset->setTextureAttributeAndModes(_shadowTextureUnit,_texture.get(),osg::StateAttribute::ON);
//test to check the texture coordinates generated during shadow pass
#if 0
stateset->setTextureMode(_shadowTextureUnit,GL_TEXTURE_GEN_S,osg::StateAttribute::ON);
stateset->setTextureMode(_shadowTextureUnit,GL_TEXTURE_GEN_T,osg::StateAttribute::ON);
stateset->setTextureMode(_shadowTextureUnit,GL_TEXTURE_GEN_R,osg::StateAttribute::ON);
stateset->setTextureMode(_shadowTextureUnit,GL_TEXTURE_GEN_Q,osg::StateAttribute::ON);
// create TexGen node
osg::ref_ptr<osg::TexGenNode> texGenNode = new osg::TexGenNode;
texGenNode->setTextureUnit(_shadowTextureUnit);
texGenNode->setTexGen(_texgen.get());
camera->addChild(texGenNode.get());
#endif
//shader for correct display
osg::ref_ptr<osg::Program> program = new osg::Program;
stateset->setAttribute(program.get());
osg::Shader* fragment_shader = new osg::Shader(osg::Shader::FRAGMENT, fragmentShaderSource_debugHUD);
program->addShader(fragment_shader);
camera->addChild(geode);