574 lines
22 KiB
C++
574 lines
22 KiB
C++
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#include "DepthPeeling.h"
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#include <osg/Array>
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#include <osg/AlphaFunc>
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#include <osg/BlendFunc>
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#include <osg/Depth>
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#include <osg/Geode>
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#include <osg/Geometry>
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#include <osg/Vec3>
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#include <osg/MatrixTransform>
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#include <osg/Texture2D>
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#include <osg/TextureRectangle>
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#include <osg/TexGen>
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#include <osg/TexEnv>
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#include <osg/TexMat>
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#include <osg/TexGenNode>
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#include <osgViewer/Viewer>
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#include <osgViewer/ViewerEventHandlers>
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#include <osg/Math>
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#include <limits>
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#include <iostream>
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const char *DepthPeeling::PeelingShader =
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{
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"#version 120\n"
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#ifdef USE_TEXTURE_RECTANGLE
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRectShadow depthtex;\n"
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#else
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"uniform sampler2DShadow depthtex;\n"
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#endif
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"uniform bool depthtest;\n" // depth test enable flag
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"uniform float invWidth;\n" // 1.0/width (shadow texture size)
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"uniform float invHeight;\n" // 1.0/height (shadow texture size)
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"uniform float offsetX;\n" // viewport lower left corner (int)
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"uniform float offsetY;\n" // viewport lower left corner (int)
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"\n"
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"bool depthpeeling()\n"
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"{\n"
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" if( depthtest ) {\n"
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" vec3 r0 = vec3((gl_FragCoord.x-offsetX)*invWidth,\n"
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" (gl_FragCoord.y-offsetY)*invHeight,\n"
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" gl_FragCoord.z);\n"
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#ifdef USE_TEXTURE_RECTANGLE
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" return shadow2DRect(depthtex, r0).r < 0.5;\n"
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#else
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" return shadow2D(depthtex, r0).r < 0.5;\n"
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#endif
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" }\n"
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" return false;\n"
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"}\n"
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};
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class PreDrawFBOCallback : public osg::Camera::DrawCallback
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{
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public:
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PreDrawFBOCallback( osg::FrameBufferObject* fbo, osg::FrameBufferObject* source_fbo, unsigned int width, unsigned int height, osg::Texture *dt, osg::Texture *ct ) :
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_fbo(fbo), _source_fbo(source_fbo), _depthTexture(dt), _colorTexture(ct), _width(width), _height(height) {}
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virtual void operator () (osg::RenderInfo& renderInfo) const
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{
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// switching only the frame buffer attachments is actually faster than switching the framebuffer
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#ifdef USE_PACKED_DEPTH_STENCIL
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#ifdef USE_TEXTURE_RECTANGLE
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_fbo->setAttachment(osg::Camera::PACKED_DEPTH_STENCIL_BUFFER, osg::FrameBufferAttachment((osg::TextureRectangle*)(_depthTexture.get())));
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#else
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_fbo->setAttachment(osg::Camera::PACKED_DEPTH_STENCIL_BUFFER, osg::FrameBufferAttachment((osg::Texture2D*)(_depthTexture.get())));
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#endif
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#else
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#ifdef USE_TEXTURE_RECTANGLE
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_fbo->setAttachment(osg::Camera::DEPTH_BUFFER, osg::FrameBufferAttachment((osg::TextureRectangle*)(_depthTexture.get())));
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#else
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_fbo->setAttachment(osg::Camera::DEPTH_BUFFER, osg::FrameBufferAttachment((osg::Texture2D*)(_depthTexture.get())));
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#endif
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#endif
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#ifdef USE_TEXTURE_RECTANGLE
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_fbo->setAttachment(osg::Camera::COLOR_BUFFER0, osg::FrameBufferAttachment((osg::TextureRectangle*)(_colorTexture.get())));
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#else
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_fbo->setAttachment(osg::Camera::COLOR_BUFFER0, osg::FrameBufferAttachment((osg::Texture2D*)(_colorTexture.get())));
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#endif
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// check if we need to do some depth buffer copying from a source FBO into the current FBO
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if (_source_fbo.get() != NULL)
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{
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osg::GLExtensions* ext = renderInfo.getState()->get<osg::GLExtensions>();
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bool fbo_supported = ext && ext->isFrameBufferObjectSupported;
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if (fbo_supported && ext->glBlitFramebuffer)
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{
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// blit the depth buffer from the solid geometry fbo into the current transparency fbo
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(_fbo.get())->apply(*renderInfo.getState(), osg::FrameBufferObject::DRAW_FRAMEBUFFER);
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(_source_fbo.get())->apply(*renderInfo.getState(), osg::FrameBufferObject::READ_FRAMEBUFFER);
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// glReadBuffer(GL_COLOR_ATTACHMENT0_EXT); // only needed to blit the color buffer
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// glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT); // only needed to blit the color buffer
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ext->glBlitFramebuffer(
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0, 0, static_cast<GLint>(_width), static_cast<GLint>(_height),
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0, 0, static_cast<GLint>(_width), static_cast<GLint>(_height),
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#ifdef USE_PACKED_DEPTH_STENCIL
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GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
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#else
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GL_DEPTH_BUFFER_BIT, GL_NEAREST);
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#endif
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(_fbo.get())->apply(*renderInfo.getState(), osg::FrameBufferObject::READ_FRAMEBUFFER);
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(_fbo.get())->apply(*renderInfo.getState(), osg::FrameBufferObject::DRAW_FRAMEBUFFER);
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}
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}
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// switch to this fbo, if it isn't already bound
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(_fbo.get())->apply( *renderInfo.getState() );
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}
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protected:
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osg::ref_ptr<osg::FrameBufferObject> _fbo;
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osg::ref_ptr<osg::FrameBufferObject> _source_fbo;
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osg::ref_ptr<osg::Texture> _depthTexture;
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osg::ref_ptr<osg::Texture> _colorTexture;
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unsigned int _width;
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unsigned int _height;
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};
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class PostDrawFBOCallback : public osg::Camera::DrawCallback
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{
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public:
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PostDrawFBOCallback(bool restore) : _restore(restore) {}
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virtual void operator () (osg::RenderInfo& renderInfo) const
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{
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// only unbind the fbo if this is the last transparency pass
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if (_restore)
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{
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renderInfo.getState()->get<osg::GLExtensions>()->glBindFramebuffer( GL_FRAMEBUFFER_EXT, 0 );
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}
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}
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protected:
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bool _restore;
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};
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DepthPeeling::CullCallback::CullCallback(unsigned int texUnit, unsigned int offsetValue) :
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_texUnit(texUnit),
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_offsetValue(offsetValue)
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{
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}
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void DepthPeeling::CullCallback::operator()(osg::Node* node, osg::NodeVisitor* nv)
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{
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osgUtil::CullVisitor* cullVisitor = static_cast<osgUtil::CullVisitor*>(nv);
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osgUtil::RenderStage* renderStage = cullVisitor->getCurrentRenderStage();
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const osg::Viewport* viewport = renderStage->getViewport();
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osg::Matrixd m(*cullVisitor->getProjectionMatrix());
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m.postMultTranslate(osg::Vec3d(1, 1, 1));
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m.postMultScale(osg::Vec3d(0.5, 0.5, 0.5));
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// scale the texture coordinates to the viewport
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#ifdef USE_TEXTURE_RECTANGLE
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m.postMultScale(osg::Vec3d(viewport->width(), viewport->height(), 1));
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#else
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#ifndef USE_NON_POWER_OF_TWO_TEXTURE
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m.postMultScale(osg::Vec3d(viewport->width()/double(_texWidth), viewport->height()/double(_texHeight), 1));
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#endif
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#endif
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if (_texUnit != 0 && _offsetValue)
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{
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// Kind of polygon offset: note this way, we can also offset lines and points.
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// Whereas with the polygon offset we could only handle surface primitives.
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m.postMultTranslate(osg::Vec3d(0, 0, -ldexp(double(_offsetValue), -24)));
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}
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osg::TexMat* texMat = new osg::TexMat(m);
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osg::StateSet* stateSet = new osg::StateSet;
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stateSet->setTextureAttribute(_texUnit, texMat);
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if (_texUnit != 0)
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{
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//
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// GLSL pipeline support
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//
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#ifdef USE_TEXTURE_RECTANGLE
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// osg::Uniform::SAMPLER_2D_RECT_SHADOW not yet available in OSG 3.0.1
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// osg::Uniform* depthUniform = new osg::Uniform(osg::Uniform::SAMPLER_2D_RECT_SHADOW, "depthtex");
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// depthUniform->set((int)_texUnit);
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osg::Uniform* depthUniform = new osg::Uniform("depthtex", (int)_texUnit);
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osg::Uniform *invWidthUniform = new osg::Uniform("invWidth", (float)1.0f);
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osg::Uniform *invHeightUniform = new osg::Uniform("invHeight", (float)1.0f);
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#else
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osg::Uniform* depthUniform = new osg::Uniform(osg::Uniform::SAMPLER_2D_SHADOW, "depthtex");
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depthUniform->set((int)_texUnit);
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osg::Uniform *invWidthUniform = new osg::Uniform("invWidth", (float)1.0f / _texWidth);
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osg::Uniform *invHeightUniform = new osg::Uniform("invHeight", (float)1.0f / _texHeight);
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#endif
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osg::Uniform *offsetXUniform = new osg::Uniform("offsetX", (float)viewport->x());
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osg::Uniform *offsetYUniform = new osg::Uniform("offsetY", (float)viewport->y());
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// uniforms required for any any GLSL implementation in the rendered geometry
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stateSet->addUniform(depthUniform);
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stateSet->addUniform(invWidthUniform);
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stateSet->addUniform(invHeightUniform);
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stateSet->addUniform(offsetXUniform);
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stateSet->addUniform(offsetYUniform);
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}
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cullVisitor->pushStateSet(stateSet);
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traverse(node, nv);
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cullVisitor->popStateSet();
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}
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osg::Node* DepthPeeling::createQuad(unsigned int layerNumber, unsigned int numTiles)
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{
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float tileSpan = 1;
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float tileOffsetX = 0;
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float tileOffsetY = 0;
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if (_showAllLayers) {
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tileSpan /= numTiles;
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tileOffsetX = tileSpan * (layerNumber%numTiles);
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tileOffsetY = 1 - tileSpan * (1 + layerNumber/numTiles);
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}
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osg::Vec3Array* vertices = new osg::Vec3Array;
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vertices->push_back(osg::Vec3f(tileOffsetX , tileOffsetY , 0));
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vertices->push_back(osg::Vec3f(tileOffsetX , tileOffsetY + tileSpan, 0));
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vertices->push_back(osg::Vec3f(tileOffsetX + tileSpan, tileOffsetY + tileSpan, 0));
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vertices->push_back(osg::Vec3f(tileOffsetX + tileSpan, tileOffsetY , 0));
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osg::Vec3Array* colors = new osg::Vec3Array;
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colors->push_back(osg::Vec3(1, 1, 1));
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osg::Vec2Array* texcoords = new osg::Vec2Array;
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texcoords->push_back(osg::Vec2f(0, 0));
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texcoords->push_back(osg::Vec2f(0, 1));
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texcoords->push_back(osg::Vec2f(1, 1));
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texcoords->push_back(osg::Vec2f(1, 0));
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osg::Geometry* geometry = new osg::Geometry;
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geometry->setVertexArray(vertices);
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geometry->setTexCoordArray(0, texcoords);
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geometry->setColorArray(colors, osg::Array::BIND_OVERALL);
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geometry->addPrimitiveSet(new osg::DrawArrays(GL_QUADS, 0, 4));
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(geometry);
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return geode;
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}
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#include <osg/State>
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void DepthPeeling::createPeeling()
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{
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int numTiles = ceil(sqrt(double(_numPasses)));
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// cleanup any previous scene data
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_root->removeChildren(0, _root->getNumChildren());
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// create depth textures
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_depthTextures.clear();
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_depthTextures.resize(3);
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for (unsigned int i = 0; i < 3; ++i) {
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#ifdef USE_TEXTURE_RECTANGLE
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_depthTextures[i] = new osg::TextureRectangle;
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#else
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_depthTextures[i] = new osg::Texture2D;
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#endif
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_depthTextures[i]->setTextureSize(_texWidth, _texHeight);
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_depthTextures[i]->setFilter(osg::Texture::MIN_FILTER, osg::Texture::NEAREST);
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_depthTextures[i]->setFilter(osg::Texture::MAG_FILTER, osg::Texture::NEAREST);
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_depthTextures[i]->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_BORDER);
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_depthTextures[i]->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_BORDER);
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#ifdef USE_PACKED_DEPTH_STENCIL
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_depthTextures[i]->setInternalFormat(GL_DEPTH24_STENCIL8_EXT);
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_depthTextures[i]->setSourceFormat(GL_DEPTH_STENCIL_EXT);
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_depthTextures[i]->setSourceType(GL_UNSIGNED_INT_24_8_EXT);
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#else
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_depthTextures[i]->setInternalFormat(GL_DEPTH_COMPONENT);
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#endif
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_depthTextures[i]->setShadowComparison(true);
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_depthTextures[i]->setShadowAmbient(0.0); // The r value if the test fails
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_depthTextures[i]->setShadowCompareFunc(osg::Texture::GREATER);
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_depthTextures[i]->setShadowTextureMode(osg::Texture::INTENSITY);
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}
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// create the cameras for the individual depth peel layers
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_colorTextures.clear();
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_colorTextures.resize(_numPasses);
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for (unsigned int i = 0; i < _numPasses; ++i) {
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// create textures for the color buffers
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#ifdef USE_TEXTURE_RECTANGLE
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osg::ref_ptr<osg::TextureRectangle> colorTexture = new osg::TextureRectangle;
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#else
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osg::ref_ptr<osg::Texture2D> colorTexture = new osg::Texture2D;
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#endif
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colorTexture->setTextureSize(_texWidth, _texHeight);
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colorTexture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::NEAREST);
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colorTexture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::NEAREST);
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colorTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_BORDER);
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colorTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_BORDER);
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colorTexture->setInternalFormat(GL_RGBA);
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_colorTextures[i] = colorTexture;
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}
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// create some uniform and cull callback objects
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osg::Uniform *depthOff = new osg::Uniform("depthtest", (bool)false);
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osg::Uniform *depthOn = new osg::Uniform("depthtest", (bool)true);
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CullCallback *ccb = new CullCallback(_texUnit, _offsetValue);
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// create a node for solid model rendering
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osg::Group *pre_solidNode = new osg::Group;
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pre_solidNode->addChild(_solidscene.get());
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// create a node for non depth peeled transparent rendering (topmost layer)
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osg::Group *transparentNodeNoPeel = new osg::Group;
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transparentNodeNoPeel->addChild(_transparentscene.get());
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transparentNodeNoPeel->getOrCreateStateSet()->addUniform(depthOff);
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transparentNodeNoPeel->getOrCreateStateSet()->setRenderBinDetails(99, "RenderBin", osg::StateSet::OVERRIDE_RENDERBIN_DETAILS);
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// create a node for depth peeled transparent rendering (any layers below).
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osg::TexGenNode* transparentNodePeel = new osg::TexGenNode;
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transparentNodePeel->setReferenceFrame(osg::TexGenNode::ABSOLUTE_RF);
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transparentNodePeel->setTextureUnit(_texUnit);
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transparentNodePeel->getTexGen()->setMode(osg::TexGen::EYE_LINEAR);
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transparentNodePeel->addChild(_transparentscene.get());
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transparentNodePeel->getOrCreateStateSet()->addUniform(depthOn);
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transparentNodePeel->getOrCreateStateSet()->setRenderBinDetails(99, "RenderBin", osg::StateSet::OVERRIDE_RENDERBIN_DETAILS);
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// only render fragments that are not completely transparent
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transparentNodePeel->getOrCreateStateSet()->setAttributeAndModes(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01),
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osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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// generate texcoords for the depth texture, supporting the fixed function pipeline
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transparentNodePeel->getOrCreateStateSet()->setTextureMode(_texUnit, GL_TEXTURE_GEN_S, osg::StateAttribute::ON);
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transparentNodePeel->getOrCreateStateSet()->setTextureMode(_texUnit, GL_TEXTURE_GEN_T, osg::StateAttribute::ON);
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transparentNodePeel->getOrCreateStateSet()->setTextureMode(_texUnit, GL_TEXTURE_GEN_R, osg::StateAttribute::ON);
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transparentNodePeel->getOrCreateStateSet()->setTextureMode(_texUnit, GL_TEXTURE_GEN_Q, osg::StateAttribute::ON);
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// use two FBOs, one for solid geometry - the other one for the transparency passes
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// depth and color attachments will be switched as needed.
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osg::ref_ptr<osg::FrameBufferObject> fbos[2] = {new osg::FrameBufferObject(), new osg::FrameBufferObject()};
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// create the cameras for the individual depth peel layers
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for (unsigned int i = 0; i < _numPasses; ++i) {
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// get the pointers to the required fbo, color and depth textures for each camera instance
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// we perform ping ponging between two depth textures
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osg::FrameBufferObject *fbo0 = (i >= 1) ? fbos[0].get() : NULL;
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osg::FrameBufferObject *fbo = (i >= 1) ? fbos[1].get() : fbos[0].get();
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osg::Texture *colorTexture = _colorTextures[i].get();
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osg::Texture *depthTexture = (i >= 1) ? _depthTextures[1+(i-1)%2].get() : _depthTextures[i].get();
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osg::Texture *prevDepthTexture = (i >= 2) ? _depthTextures[1+(i-2)%2].get() : NULL;
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// all our peeling layer cameras are post render
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osg::Camera* camera = new osg::Camera;
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camera->setDataVariance(osg::Object::DYNAMIC);
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camera->setInheritanceMask(osg::Camera::ALL_VARIABLES);
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camera->setRenderOrder(osg::Camera::POST_RENDER, i);
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camera->setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
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camera->setClearColor(osg::Vec4f(0, 0, 0, 0));
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camera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
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camera->setPreDrawCallback(new PreDrawFBOCallback(fbo, fbo0, _texWidth, _texHeight, depthTexture, colorTexture));
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camera->setPostDrawCallback(new PostDrawFBOCallback(i == _numPasses - 1));
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camera->setDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
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camera->setReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
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camera->setAllowEventFocus(false);
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// the peeled layers are rendered with blending forced off
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// and the depth buffer is directly taken from camera 0 via framebuffer blit
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if (i > 0) {
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camera->getOrCreateStateSet()->setMode(GL_BLEND, osg::StateAttribute::OFF | osg::StateAttribute::OVERRIDE);
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camera->setClearMask(GL_COLOR_BUFFER_BIT);
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} else {
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// camera 0 has to clear both the depth and color buffers
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camera->setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
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}
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// add the correct geometry for each pass.
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// the peeling passes also need read access to prevDepthTexture and a cull callback
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if (0 == i) { // solid geometry
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camera->addChild(pre_solidNode);
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} else if (1 == i) { // topmost layer peeling pass
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camera->addChild(transparentNodeNoPeel);
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} else { // behind layers peeling passes
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camera->addChild(transparentNodePeel);
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// set depth (shadow) texture for depth peeling and add a cull callback
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camera->getOrCreateStateSet()->setTextureAttributeAndModes(_texUnit, prevDepthTexture);
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camera->addCullCallback(ccb);
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}
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_root->addChild(camera);
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}
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// create the composite camera that blends the peeled layers into the final scene
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_compositeCamera = new osg::Camera;
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_compositeCamera->setDataVariance(osg::Object::DYNAMIC);
|
|
_compositeCamera->setInheritanceMask(osg::Camera::READ_BUFFER | osg::Camera::DRAW_BUFFER);
|
|
_compositeCamera->setRenderOrder(osg::Camera::POST_RENDER, _numPasses);
|
|
_compositeCamera->setComputeNearFarMode(osg::Camera::COMPUTE_NEAR_FAR_USING_PRIMITIVES);
|
|
_compositeCamera->setClearMask(0);
|
|
_compositeCamera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
|
|
_compositeCamera->setViewMatrix(osg::Matrix());
|
|
_compositeCamera->setProjectionMatrix(osg::Matrix::ortho2D(0, 1, 0, 1));
|
|
_compositeCamera->setCullCallback(new CullCallback(0, 0));
|
|
osg::StateSet* ss = _compositeCamera->getOrCreateStateSet();
|
|
ss->setRenderBinDetails(100, "TraversalOrderBin", osg::StateSet::OVERRIDE_RENDERBIN_DETAILS);
|
|
_root->addChild(_compositeCamera.get());
|
|
|
|
// solid geometry is blended first, transparency layers are blended in back to front order.
|
|
// this order is achieved by rendering using a TraversalOrderBin (see camera stateset).
|
|
for (unsigned int i = _numPasses; i > 0; --i) {
|
|
osg::Node* geode = createQuad(i%_numPasses, numTiles);
|
|
osg::StateSet *stateSet = geode->getOrCreateStateSet();
|
|
stateSet->setTextureAttributeAndModes(0, _colorTextures[i%_numPasses].get(), osg::StateAttribute::ON);
|
|
stateSet->setAttribute(new osg::BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA), osg::StateAttribute::ON);
|
|
stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
|
|
stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
|
|
osg::Depth* depth = new osg::Depth;
|
|
depth->setWriteMask( false );
|
|
stateSet->setAttributeAndModes( depth, osg::StateAttribute::ON );
|
|
stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
|
|
_compositeCamera->addChild(geode);
|
|
}
|
|
}
|
|
|
|
DepthPeeling::DepthPeeling(unsigned int width, unsigned int height) :
|
|
_numPasses(9),
|
|
_texUnit(2),
|
|
_texWidth(width),
|
|
_texHeight(height),
|
|
_showAllLayers(false),
|
|
_offsetValue(8),
|
|
_root(new osg::Group),
|
|
_solidscene(new osg::Group),
|
|
_transparentscene(new osg::Group)
|
|
{
|
|
createPeeling();
|
|
}
|
|
|
|
void DepthPeeling::setSolidScene(osg::Node* scene)
|
|
{
|
|
_solidscene->removeChildren(0, _solidscene->getNumChildren());
|
|
_solidscene->addChild(scene);
|
|
}
|
|
|
|
void DepthPeeling::setTransparentScene(osg::Node* scene)
|
|
{
|
|
_transparentscene->removeChildren(0, _transparentscene->getNumChildren());
|
|
_transparentscene->addChild(scene);
|
|
}
|
|
|
|
osg::Node* DepthPeeling::getRoot()
|
|
{
|
|
return _root.get();
|
|
}
|
|
|
|
void DepthPeeling::resize(int width, int height)
|
|
{
|
|
#ifdef USE_TEXTURE_RECTANGLE
|
|
for (unsigned int i = 0; i < 3; ++i)
|
|
_depthTextures[i]->setTextureSize(width, height);
|
|
for (unsigned int i = 0; i < _colorTextures.size(); ++i)
|
|
_colorTextures[i]->setTextureSize(width, height);
|
|
_texWidth = width;
|
|
_texHeight = height;
|
|
#else
|
|
#ifndef USE_NON_POWER_OF_TWO_TEXTURE
|
|
width = nextPowerOfTwo(width);
|
|
height = nextPowerOfTwo(height);
|
|
#endif
|
|
_depthTextures[0]->setTextureSize(width, height);
|
|
_depthTextures[1]->setTextureSize(width, height);
|
|
for (unsigned int i = 0; i < _colorTextures.size(); ++i)
|
|
_colorTextures[i]->setTextureSize(width, height);
|
|
_texWidth = width;
|
|
_texHeight = height;
|
|
#endif
|
|
createPeeling();
|
|
}
|
|
|
|
void DepthPeeling::setNumPasses(unsigned int numPasses)
|
|
{
|
|
if (numPasses == _numPasses)
|
|
return;
|
|
if (numPasses == unsigned(-1))
|
|
return;
|
|
_numPasses = numPasses;
|
|
createPeeling();
|
|
}
|
|
unsigned int DepthPeeling::getNumPasses() const
|
|
{
|
|
return _numPasses;
|
|
}
|
|
|
|
void DepthPeeling::setTexUnit(unsigned int texUnit)
|
|
{
|
|
if (texUnit == _texUnit)
|
|
return;
|
|
_texUnit = texUnit;
|
|
createPeeling();
|
|
}
|
|
|
|
void DepthPeeling::setShowAllLayers(bool showAllLayers)
|
|
{
|
|
if (showAllLayers == _showAllLayers)
|
|
return;
|
|
_showAllLayers = showAllLayers;
|
|
createPeeling();
|
|
}
|
|
bool DepthPeeling::getShowAllLayers() const
|
|
{
|
|
return _showAllLayers;
|
|
}
|
|
|
|
void DepthPeeling::setOffsetValue(unsigned int offsetValue)
|
|
{
|
|
if (offsetValue == _offsetValue)
|
|
return;
|
|
_offsetValue = offsetValue;
|
|
createPeeling();
|
|
}
|
|
unsigned int DepthPeeling::getOffsetValue() const
|
|
{
|
|
return _offsetValue;
|
|
}
|
|
|
|
|
|
DepthPeeling::EventHandler::EventHandler(DepthPeeling* depthPeeling) :
|
|
_depthPeeling(depthPeeling)
|
|
{ }
|
|
|
|
|
|
/** Handle events, return true if handled, false otherwise. */
|
|
bool DepthPeeling::EventHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter&, osg::Object*, osg::NodeVisitor*)
|
|
{
|
|
if (ea.getEventType() == osgGA::GUIEventAdapter::RESIZE) {
|
|
_depthPeeling->resize(ea.getWindowWidth(), ea.getWindowHeight());
|
|
return true;
|
|
}
|
|
|
|
if (ea.getEventType() == osgGA::GUIEventAdapter::KEYDOWN) {
|
|
switch (ea.getKey()) {
|
|
case 'm':
|
|
_depthPeeling->setNumPasses(_depthPeeling->getNumPasses() + 1);
|
|
return true;
|
|
case 'n':
|
|
_depthPeeling->setNumPasses(_depthPeeling->getNumPasses() - 1);
|
|
return true;
|
|
case 'p':
|
|
_depthPeeling->setOffsetValue(_depthPeeling->getOffsetValue() + 1);
|
|
return true;
|
|
case 'o':
|
|
_depthPeeling->setOffsetValue(_depthPeeling->getOffsetValue() - 1);
|
|
return true;
|
|
case 'l':
|
|
_depthPeeling->setShowAllLayers(!_depthPeeling->getShowAllLayers());
|
|
return true;
|
|
default:
|
|
return false;
|
|
};
|
|
}
|
|
|
|
return false;
|
|
}
|