940 lines
33 KiB
C++
940 lines
33 KiB
C++
#include <osg/ArgumentParser>
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#include <osg/LightModel>
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#include <osg/Depth>
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#include <osg/BlendFunc>
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#include <osg/Camera>
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#include <osg/Stencil>
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#include <osg/StencilTwoSided>
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#include <osg/CullFace>
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#include <osg/Geometry>
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#include <osg/Switch>
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#include <osgGA/TrackballManipulator>
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#include <osgGA/FlightManipulator>
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#include <osgGA/DriveManipulator>
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#include <osgGA/KeySwitchMatrixManipulator>
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#include <osgGA/AnimationPathManipulator>
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#include <osgGA/TerrainManipulator>
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#include <osgGA/AnimationPathManipulator>
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#include <osgGA/StateSetManipulator>
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#include <osgViewer/Viewer>
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#include <osgViewer/StatsHandler>
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#include <osgShadow/OccluderGeometry>
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#include <osgDB/ReadFile>
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#include <osgDB/WriteFile>
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#include <iostream>
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class ComputeBoundingBoxVisitor : public osg::NodeVisitor
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{
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public:
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ComputeBoundingBoxVisitor():
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN)
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{
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}
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virtual void reset()
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{
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_matrixStack.clear();
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_bb.init();
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}
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osg::BoundingBox& getBoundingBox() { return _bb; }
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void getPolytope(osg::Polytope& polytope, float margin=0.1) const
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{
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float delta = _bb.radius()*margin;
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polytope.add( osg::Plane(0.0, 0.0, 1.0, -(_bb.zMin()-delta)) );
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polytope.add( osg::Plane(0.0, 0.0, -1.0, (_bb.zMax()+delta)) );
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polytope.add( osg::Plane(1.0, 0.0, 0.0, -(_bb.xMin()-delta)) );
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polytope.add( osg::Plane(-1.0, 0.0, 0.0, (_bb.xMax()+delta)) );
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polytope.add( osg::Plane(0.0, 1.0, 0.0, -(_bb.yMin()-delta)) );
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polytope.add( osg::Plane(0.0, -1.0, 0.0, (_bb.yMax()+delta)) );
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}
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void getBase(osg::Polytope& polytope, float margin=0.1) const
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{
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float delta = _bb.radius()*margin;
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polytope.add( osg::Plane(0.0, 0.0, 1.0, -(_bb.zMin()-delta)) );
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}
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void apply(osg::Node& node)
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{
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traverse(node);
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}
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void apply(osg::Transform& transform)
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{
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osg::Matrix matrix;
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if (!_matrixStack.empty()) matrix = _matrixStack.back();
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transform.computeLocalToWorldMatrix(matrix,this);
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pushMatrix(matrix);
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traverse(transform);
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popMatrix();
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}
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void apply(osg::Geode& geode)
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{
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for(unsigned int i=0; i<geode.getNumDrawables(); ++i)
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{
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apply(geode.getDrawable(i));
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}
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}
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void pushMatrix(osg::Matrix& matrix)
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{
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_matrixStack.push_back(matrix);
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}
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void popMatrix()
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{
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_matrixStack.pop_back();
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}
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void apply(osg::Drawable* drawable)
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{
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if (_matrixStack.empty()) _bb.expandBy(drawable->getBound());
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else
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{
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osg::Matrix& matrix = _matrixStack.back();
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const osg::BoundingBox& dbb = drawable->getBound();
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if (dbb.valid())
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{
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_bb.expandBy(dbb.corner(0) * matrix);
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_bb.expandBy(dbb.corner(1) * matrix);
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_bb.expandBy(dbb.corner(2) * matrix);
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_bb.expandBy(dbb.corner(3) * matrix);
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_bb.expandBy(dbb.corner(4) * matrix);
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_bb.expandBy(dbb.corner(5) * matrix);
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_bb.expandBy(dbb.corner(6) * matrix);
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_bb.expandBy(dbb.corner(7) * matrix);
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}
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}
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}
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protected:
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typedef std::vector<osg::Matrix> MatrixStack;
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MatrixStack _matrixStack;
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osg::BoundingBox _bb;
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};
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enum Faces
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{
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FRONT_FACE = 1,
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BACK_FACE = 2,
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LEFT_FACE = 4,
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RIGHT_FACE = 8,
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TOP_FACE = 16,
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BOTTOM_FACE = 32
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};
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osg::Node* createCube(unsigned int mask)
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{
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osg::Geode* geode = new osg::Geode;
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osg::Geometry* geometry = new osg::Geometry;
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geode->addDrawable(geometry);
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osg::Vec3Array* vertices = new osg::Vec3Array;
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geometry->setVertexArray(vertices);
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osg::Vec3Array* normals = new osg::Vec3Array;
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geometry->setNormalArray(normals);
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geometry->setNormalBinding(osg::Geometry::BIND_PER_VERTEX);
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osg::Vec4Array* colours = new osg::Vec4Array;
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geometry->setColorArray(colours);
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geometry->setColorBinding(osg::Geometry::BIND_OVERALL);
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colours->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
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osg::Vec3 origin(0.0f,0.0f,0.0f);
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osg::Vec3 dx(2.0f,0.0f,0.0f);
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osg::Vec3 dy(0.0f,1.0f,0.0f);
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osg::Vec3 dz(0.0f,0.0f,1.0f);
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osg::Vec3 px(1.0f,0.0,0.0f);
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osg::Vec3 nx(-1.0f,0.0,0.0f);
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osg::Vec3 py(0.0f,1.0f,0.0f);
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osg::Vec3 ny(0.0f,-1.0f,0.0f);
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osg::Vec3 pz(0.0f,0.0f,1.0f);
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osg::Vec3 nz(0.0f,0.0f,-1.0f);
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if (mask & FRONT_FACE)
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{
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// front face
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vertices->push_back(origin);
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vertices->push_back(origin+dx);
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vertices->push_back(origin+dx+dz);
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vertices->push_back(origin+dz);
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normals->push_back(ny);
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normals->push_back(ny);
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normals->push_back(ny);
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normals->push_back(ny);
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}
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if (mask & BACK_FACE)
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{
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// back face
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vertices->push_back(origin+dy);
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vertices->push_back(origin+dy+dz);
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vertices->push_back(origin+dy+dx+dz);
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vertices->push_back(origin+dy+dx);
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normals->push_back(py);
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normals->push_back(py);
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normals->push_back(py);
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normals->push_back(py);
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}
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if (mask & LEFT_FACE)
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{
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// left face
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vertices->push_back(origin+dy);
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vertices->push_back(origin);
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vertices->push_back(origin+dz);
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vertices->push_back(origin+dy+dz);
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normals->push_back(nx);
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normals->push_back(nx);
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normals->push_back(nx);
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normals->push_back(nx);
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}
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if (mask & RIGHT_FACE)
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{
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// right face
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vertices->push_back(origin+dx+dy);
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vertices->push_back(origin+dx+dy+dz);
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vertices->push_back(origin+dx+dz);
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vertices->push_back(origin+dx);
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normals->push_back(px);
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normals->push_back(px);
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normals->push_back(px);
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normals->push_back(px);
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}
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if (mask & TOP_FACE)
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{
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// top face
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vertices->push_back(origin+dz);
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vertices->push_back(origin+dz+dx);
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vertices->push_back(origin+dz+dx+dy);
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vertices->push_back(origin+dz+dy);
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normals->push_back(pz);
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normals->push_back(pz);
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normals->push_back(pz);
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normals->push_back(pz);
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}
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if (mask & BOTTOM_FACE)
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{
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// bottom face
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vertices->push_back(origin);
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vertices->push_back(origin+dy);
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vertices->push_back(origin+dx+dy);
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vertices->push_back(origin+dx);
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normals->push_back(nz);
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normals->push_back(nz);
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normals->push_back(nz);
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normals->push_back(nz);
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}
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geometry->addPrimitiveSet(new osg::DrawArrays(GL_QUADS, 0, vertices->size()));
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return geode;
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}
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class SwitchHandler : public osgGA::GUIEventHandler
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{
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public:
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SwitchHandler():
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_childNum(0) {}
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virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& /*aa*/, osg::Object* object, osg::NodeVisitor* /*nv*/)
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{
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osg::Switch* sw = dynamic_cast<osg::Switch*>(object);
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if (!sw) return false;
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if (ea.getHandled()) return false;
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switch(ea.getEventType())
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{
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case(osgGA::GUIEventAdapter::KEYDOWN):
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{
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if (ea.getKey()=='n')
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{
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++_childNum;
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if (_childNum >= sw->getNumChildren()) _childNum = 0;
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sw->setSingleChildOn(_childNum);
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return true;
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}
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break;
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}
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default:
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break;
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}
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return false;
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}
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protected:
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virtual ~SwitchHandler() {}
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unsigned int _childNum;
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};
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osg::Node* createTestModel()
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{
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osg::Switch* sw = new osg::Switch;
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sw->setEventCallback(new SwitchHandler);
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sw->addChild(createCube(FRONT_FACE), true);
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sw->addChild(createCube(FRONT_FACE | BACK_FACE), false);
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sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE), false);
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sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE | RIGHT_FACE), false);
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sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE | RIGHT_FACE | TOP_FACE), false);
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sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE | RIGHT_FACE | TOP_FACE | BOTTOM_FACE), false);
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return sw;
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}
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class ShadowCallback : public osg::NodeCallback
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{
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public:
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osg::Vec4 _lightpos;
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osg::ref_ptr<osg::StateSet> _ss1;
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osg::ref_ptr<osg::StateSet> _mainShadowStateSet;
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osg::ref_ptr<osg::StateSet> _shadowVolumeStateSet;
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osg::ref_ptr<osg::StateSet> _shadowedSceneStateSet;
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ShadowCallback(osgShadow::ShadowVolumeGeometry::DrawMode drawMode)
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{
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osg::Vec4 ambient(0.2,0.2,0.2,1.0);
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osg::Vec4 diffuse(0.8,0.8,0.8,1.0);
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osg::Vec4 zero_colour(0.0,0.0,0.0,1.0);
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_lightpos.set(0.0,0.0,1.0,0.0);
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// first group, render the depth buffer + ambient light contribution
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{
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_ss1 = new osg::StateSet;
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osg::LightModel* lm1 = new osg::LightModel;
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lm1->setAmbientIntensity(ambient);
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_ss1->setAttribute(lm1);
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osg::Light* light1 = new osg::Light;
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light1->setAmbient(ambient);
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light1->setDiffuse(zero_colour);
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light1->setPosition(_lightpos);
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_ss1->setAttributeAndModes(light1, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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_ss1->setMode(GL_LIGHTING, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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}
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{
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_mainShadowStateSet = new osg::StateSet;
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osg::Depth* depth = new osg::Depth;
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depth->setWriteMask(false);
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depth->setFunction(osg::Depth::LEQUAL);
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_mainShadowStateSet->setAttribute(depth);
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_mainShadowStateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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}
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{
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_shadowVolumeStateSet = new osg::StateSet;
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osg::Depth* depth = new osg::Depth;
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depth->setWriteMask(false);
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depth->setFunction(osg::Depth::LEQUAL);
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_shadowVolumeStateSet->setAttribute(depth);
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_shadowVolumeStateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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_shadowVolumeStateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
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if (drawMode == osgShadow::ShadowVolumeGeometry::STENCIL_TWO_SIDED)
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{
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osg::StencilTwoSided* stencil = new osg::StencilTwoSided;
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stencil->setFunction(osg::StencilTwoSided::BACK, osg::StencilTwoSided::ALWAYS,0,~0u);
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stencil->setOperation(osg::StencilTwoSided::BACK, osg::StencilTwoSided::KEEP, osg::StencilTwoSided::KEEP, osg::StencilTwoSided::DECR_WRAP);
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stencil->setFunction(osg::StencilTwoSided::FRONT, osg::StencilTwoSided::ALWAYS,0,~0u);
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stencil->setOperation(osg::StencilTwoSided::FRONT, osg::StencilTwoSided::KEEP, osg::StencilTwoSided::KEEP, osg::StencilTwoSided::INCR_WRAP);
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osg::ColorMask* colourMask = new osg::ColorMask(false, false, false, false);
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_shadowVolumeStateSet->setAttributeAndModes(stencil,osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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_shadowVolumeStateSet->setAttribute(colourMask, osg::StateAttribute::OVERRIDE);
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_shadowVolumeStateSet->setMode(GL_CULL_FACE,osg::StateAttribute::OFF);
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}
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else
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{
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osg::Stencil* stencil = new osg::Stencil;
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stencil->setFunction(osg::Stencil::ALWAYS,0,~0u);
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stencil->setOperation(osg::Stencil::KEEP, osg::Stencil::KEEP, osg::Stencil::KEEP);
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osg::ColorMask* colourMask = new osg::ColorMask(false, false, false, false);
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_shadowVolumeStateSet->setAttributeAndModes(stencil,osg::StateAttribute::ON);
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_shadowVolumeStateSet->setAttribute(colourMask);
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_shadowVolumeStateSet->setMode(GL_CULL_FACE,osg::StateAttribute::ON);
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}
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}
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{
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_shadowedSceneStateSet = new osg::StateSet;
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osg::Depth* depth = new osg::Depth;
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depth->setWriteMask(false);
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depth->setFunction(osg::Depth::LEQUAL);
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_shadowedSceneStateSet->setAttribute(depth);
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_shadowedSceneStateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
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_shadowedSceneStateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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osg::LightModel* lm1 = new osg::LightModel;
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lm1->setAmbientIntensity(zero_colour);
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_shadowedSceneStateSet->setAttribute(lm1);
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osg::LightSource* lightsource = new osg::LightSource;
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// lightsource->setLight(light.get());
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osg::Light* light = new osg::Light;
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light->setAmbient(zero_colour);
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light->setDiffuse(diffuse);
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light->setPosition(_lightpos);
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_shadowedSceneStateSet->setMode(GL_LIGHT0, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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_shadowedSceneStateSet->setAttribute(light);
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// set up the stencil ops so that only operator on this mirrors stencil value.
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osg::Stencil* stencil = new osg::Stencil;
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stencil->setFunction(osg::Stencil::EQUAL,0,~0u);
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stencil->setOperation(osg::Stencil::KEEP, osg::Stencil::KEEP, osg::Stencil::KEEP);
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_shadowedSceneStateSet->setAttributeAndModes(stencil,osg::StateAttribute::ON);
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osg::BlendFunc* blend = new osg::BlendFunc;
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blend->setFunction(osg::BlendFunc::ONE, osg::BlendFunc::ONE);
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_shadowedSceneStateSet->setAttributeAndModes(blend, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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_shadowedSceneStateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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}
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_ss1->setThreadSafeRefUnref(true);
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_mainShadowStateSet->setThreadSafeRefUnref(true);
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_shadowVolumeStateSet->setThreadSafeRefUnref(true);
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_shadowedSceneStateSet->setThreadSafeRefUnref(true);
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}
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virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
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{
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osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nv);
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if (!cv)
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{
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traverse(node,nv);
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return;
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}
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// osg::notify(osg::NOTICE)<<std::endl<<std::endl<<"Cull callback"<<std::endl;
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osg::ref_ptr<osgUtil::RenderBin> original_bin = cv->getCurrentRenderBin();
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osg::ref_ptr<osgUtil::RenderBin> new_bin = original_bin->find_or_insert(999,"RenderBin");
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cv->setCurrentRenderBin(new_bin.get());
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traverse(node,nv);
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cv->setCurrentRenderBin(original_bin.get());
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#if 0
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osg::notify(osg::NOTICE)<<"new_bin->getStateGraphList().size()= "<<new_bin->getStateGraphList().size()<<std::endl;
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osg::notify(osg::NOTICE)<<"new_bin->getRenderBinList().size()= "<<new_bin->getRenderBinList().size()<<std::endl;
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osg::notify(osg::NOTICE)<<"new_bin->getRenderLeafList().size()= "<<new_bin->getRenderLeafList().size()<<std::endl;
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for(osgUtil::RenderBin::RenderBinList::iterator itr = new_bin->getRenderBinList().begin();
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itr != new_bin->getRenderBinList().end();
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++itr)
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{
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osg::notify(osg::NOTICE)<<"bin num = "<<itr->first<<std::endl;
|
|
}
|
|
#endif
|
|
|
|
osgUtil::RenderBin::RenderBinList::iterator itr = new_bin->getRenderBinList().find(1000);
|
|
osg::ref_ptr<osgUtil::RenderBin> shadowVolumeBin;
|
|
if (itr != new_bin->getRenderBinList().end())
|
|
{
|
|
shadowVolumeBin = itr->second;
|
|
|
|
if (shadowVolumeBin.valid())
|
|
{
|
|
// osg::notify(osg::NOTICE)<<"Found shadow volume bin, now removing it"<<std::endl;
|
|
new_bin->getRenderBinList().erase(itr);
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
for(osgUtil::RenderBin::RenderBinList::iterator itr = new_bin->getRenderBinList().begin();
|
|
itr != new_bin->getRenderBinList().end();
|
|
++itr)
|
|
{
|
|
osg::notify(osg::NOTICE)<<"bin num = "<<itr->first<<std::endl;
|
|
}
|
|
|
|
osg::notify(osg::NOTICE)<<"after new_bin->getStateGraphList().size()= "<<new_bin->getStateGraphList().size()<<std::endl;
|
|
osg::notify(osg::NOTICE)<<"after new_bin->getRenderBinList().size()= "<<new_bin->getRenderBinList().size()<<std::endl;
|
|
osg::notify(osg::NOTICE)<<"after new_bin->getRenderLeafList().size()= "<<new_bin->getRenderLeafList().size()<<std::endl;
|
|
#endif
|
|
|
|
|
|
original_bin->setStateSet(_ss1.get());
|
|
|
|
osgUtil::RenderStage* orig_rs = cv->getRenderStage();
|
|
osgUtil::RenderStage* new_rs = new osgUtil::RenderStage;
|
|
orig_rs->addPostRenderStage(new_rs);
|
|
|
|
new_rs->setViewport(orig_rs->getViewport());
|
|
new_rs->setClearColor(orig_rs->getClearColor());
|
|
new_rs->setClearMask(GL_STENCIL_BUFFER_BIT);
|
|
new_rs->setDrawBuffer(orig_rs->getDrawBuffer());
|
|
new_rs->setReadBuffer(orig_rs->getReadBuffer());
|
|
new_rs->setColorMask(orig_rs->getColorMask());
|
|
new_rs->setPositionalStateContainer(orig_rs->getPositionalStateContainer());
|
|
#if 1
|
|
|
|
#if 0
|
|
osg::notify(osg::NOTICE)<<"orig_rs="<<orig_rs<<std::endl;
|
|
osg::notify(osg::NOTICE)<<"new_rs="<<new_rs<<std::endl;
|
|
#endif
|
|
if (shadowVolumeBin.valid())
|
|
{
|
|
// new_rs->setStateSet(_mainShadowStateSet.get());
|
|
new_rs->getRenderBinList()[0] = shadowVolumeBin;
|
|
shadowVolumeBin->setStateSet(_shadowVolumeStateSet.get());
|
|
|
|
osg::ref_ptr<osgUtil::RenderBin> nested_bin = new_rs->find_or_insert(1,"RenderBin");
|
|
nested_bin->getRenderBinList()[0] = new_bin;
|
|
|
|
nested_bin->setStateSet(_shadowedSceneStateSet.get());
|
|
|
|
#if 0
|
|
osg::notify(osg::NOTICE)<<"shadowVolumeBin="<<shadowVolumeBin.get()<<std::endl;
|
|
osg::notify(osg::NOTICE)<<"nested_bin="<<nested_bin.get()<<std::endl;
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
}
|
|
};
|
|
|
|
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
// use an ArgumentParser object to manage the program arguments.
|
|
osg::ArgumentParser arguments(&argc, argv);
|
|
|
|
// set up the usage document, in case we need to print out how to use this program.
|
|
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName() + " is the example which demonstrates using of GL_ARB_shadow extension implemented in osg::Texture class");
|
|
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName());
|
|
arguments.getApplicationUsage()->addCommandLineOption("-h or --help", "Display this information");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--positionalLight", "Use a positional light.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--directionalLight", "Use a direction light.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--addOccluderToScene", "Add the occluders geometry.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--noUpdate", "Disable the updating the of light source.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--base", "Add a base geometry to test shadows.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--noShadow", "Disable the shadows.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--two-sided", "Use two-sided stencil extension for shadow volumes.");
|
|
arguments.getApplicationUsage()->addCommandLineOption("--two-pass", "Use two-pass stencil for shadow volumes.");
|
|
|
|
// hint to tell viewer to request stencil buffer when setting up windows
|
|
osg::DisplaySettings::instance()->setMinimumNumStencilBits(8);
|
|
|
|
// construct the viewer.
|
|
osgViewer::Viewer viewer;
|
|
|
|
// if user request help write it out to cout.
|
|
if (arguments.read("-h") || arguments.read("--help"))
|
|
{
|
|
arguments.getApplicationUsage()->write(std::cout);
|
|
return 1;
|
|
}
|
|
|
|
bool postionalLight = false;
|
|
while (arguments.read("--positionalLight")) postionalLight = true;
|
|
while (arguments.read("--directionalLight")) postionalLight = false;
|
|
|
|
bool addOccluderToScene = false;
|
|
while (arguments.read("--addOccluderToScene")) addOccluderToScene = true;
|
|
|
|
bool updateLightPosition = true;
|
|
while (arguments.read("--noUpdate")) updateLightPosition = false;
|
|
|
|
bool createBase = false;
|
|
while (arguments.read("--base")) createBase = true;
|
|
|
|
bool doShadow = true;
|
|
while (arguments.read("--noShadow")) doShadow = false;
|
|
|
|
bool cullCallback = false;
|
|
while (arguments.read("-c")) cullCallback = true;
|
|
|
|
int screenNum = -1;
|
|
while (arguments.read("--screen", screenNum)) viewer.setUpViewOnSingleScreen(screenNum);
|
|
|
|
osgShadow::ShadowVolumeGeometry::DrawMode drawMode = osgShadow::ShadowVolumeGeometry::STENCIL_TWO_SIDED;
|
|
while (arguments.read("--two-sided")) drawMode = osgShadow::ShadowVolumeGeometry::STENCIL_TWO_SIDED;
|
|
while (arguments.read("--two-pass")) drawMode = osgShadow::ShadowVolumeGeometry::STENCIL_TWO_PASS;
|
|
|
|
|
|
// 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() );
|
|
}
|
|
|
|
|
|
// add the state manipulator
|
|
viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
|
|
|
|
// add stats
|
|
viewer.addEventHandler( new osgViewer::StatsHandler() );
|
|
|
|
// any option left unread are converted into errors to write out later.
|
|
arguments.reportRemainingOptionsAsUnrecognized();
|
|
|
|
// report any errors if they have occured when parsing the program aguments.
|
|
if (arguments.errors())
|
|
{
|
|
arguments.writeErrorMessages(std::cout);
|
|
return 1;
|
|
}
|
|
|
|
|
|
osg::ref_ptr<osg::Node> model = osgDB::readNodeFiles(arguments);
|
|
if (!model)
|
|
{
|
|
model = createTestModel();
|
|
}
|
|
|
|
// get the bounds of the model.
|
|
ComputeBoundingBoxVisitor cbbv;
|
|
model->accept(cbbv);
|
|
osg::BoundingBox bb = cbbv.getBoundingBox();
|
|
|
|
if (createBase)
|
|
{
|
|
osg::ref_ptr<osg::Group> newGroup = new osg::Group;
|
|
newGroup->addChild(model.get());
|
|
|
|
osg::Geode* geode = new osg::Geode;
|
|
|
|
osg::Vec3 widthVec(bb.radius(), 0.0f, 0.0f);
|
|
osg::Vec3 depthVec(0.0f, bb.radius(), 0.0f);
|
|
osg::Vec3 centerBase( (bb.xMin()+bb.xMax())*0.5f, (bb.yMin()+bb.yMax())*0.5f, bb.zMin()-bb.radius()*0.1f );
|
|
|
|
geode->addDrawable( osg::createTexturedQuadGeometry( centerBase-widthVec*1.5f-depthVec*1.5f,
|
|
widthVec*3.0f, depthVec*3.0f) );
|
|
newGroup->addChild(geode);
|
|
|
|
model = newGroup.get();
|
|
}
|
|
|
|
// get the bounds of the model.
|
|
cbbv.reset();
|
|
model->accept(cbbv);
|
|
bb = cbbv.getBoundingBox();
|
|
|
|
osg::ref_ptr<osg::Group> group = new osg::Group;
|
|
|
|
// set up the occluder
|
|
osg::ref_ptr<osgShadow::OccluderGeometry> occluder = new osgShadow::OccluderGeometry;
|
|
occluder->computeOccluderGeometry(model.get());
|
|
// cbbv.getPolytope(occluder->getBoundingPolytope(),0.001);
|
|
cbbv.getBase(occluder->getBoundingPolytope(),0.001);
|
|
|
|
if (addOccluderToScene)
|
|
{
|
|
osg::ref_ptr<osg::Geode> geode = new osg::Geode;
|
|
geode->addDrawable(occluder.get());
|
|
group->addChild(geode.get());
|
|
}
|
|
|
|
osg::ref_ptr<osgShadow::ShadowVolumeGeometry> shadowVolume = new osgShadow::ShadowVolumeGeometry;
|
|
|
|
// shadowVolume->setUseDisplayList(!updateLightPosition);
|
|
shadowVolume->setUseDisplayList(false);
|
|
|
|
osg::Vec4 lightpos;
|
|
|
|
if (postionalLight)
|
|
{
|
|
lightpos.set(bb.center().x(), bb.center().y(), bb.zMax() + bb.radius() ,1.0f);
|
|
}
|
|
else
|
|
{
|
|
lightpos.set(0.5f,0.25f,0.8f,0.0f);
|
|
}
|
|
|
|
|
|
|
|
osg::ref_ptr<osg::Light> light = new osg::Light;
|
|
|
|
if (!doShadow)
|
|
{
|
|
group->addChild(model.get());
|
|
|
|
osg::ref_ptr<osg::Geode> geode = new osg::Geode;
|
|
occluder->computeShadowVolumeGeometry(lightpos, *shadowVolume);
|
|
geode->addDrawable(shadowVolume.get());
|
|
group->addChild(geode.get());
|
|
|
|
osg::StateSet* ss = geode->getOrCreateStateSet();
|
|
ss->setAttributeAndModes(new osg::CullFace(osg::CullFace::BACK), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
|
|
|
|
}
|
|
else if (cullCallback)
|
|
{
|
|
|
|
int shadowVolumeBin = 1000;
|
|
|
|
group->setCullCallback(new ShadowCallback(drawMode));
|
|
|
|
group->addChild(model.get());
|
|
|
|
{
|
|
osg::ref_ptr<osg::Geode> geode = new osg::Geode;
|
|
group->addChild(geode.get());
|
|
|
|
occluder->computeShadowVolumeGeometry(lightpos, *shadowVolume);
|
|
shadowVolume->setDrawMode(drawMode);
|
|
|
|
|
|
if (drawMode == osgShadow::ShadowVolumeGeometry::STENCIL_TWO_SIDED)
|
|
{
|
|
osg::notify(osg::NOTICE)<<"STENCIL_TWO_SIDED seleteced"<<std::endl;
|
|
|
|
osg::StateSet* ss_sv1 = geode->getOrCreateStateSet();
|
|
ss_sv1->setRenderBinDetails(shadowVolumeBin, "RenderBin");
|
|
geode->addDrawable(shadowVolume.get());
|
|
}
|
|
else
|
|
{
|
|
osg::notify(osg::NOTICE)<<"STENCIL_TWO_PASSES seleteced"<<std::endl;
|
|
|
|
osg::StateSet* ss_sv1 = geode->getOrCreateStateSet();
|
|
ss_sv1->setRenderBinDetails(shadowVolumeBin, "RenderBin");
|
|
geode->addDrawable(shadowVolume.get());
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
osg::Vec4 ambient(0.2,0.2,0.2,1.0);
|
|
osg::Vec4 diffuse(0.8,0.8,0.8,1.0);
|
|
osg::Vec4 zero_colour(0.0,0.0,0.0,1.0);
|
|
|
|
// first group, render the depth buffer + ambient light contribution
|
|
{
|
|
|
|
osg::Group* first_model_group = new osg::Group;
|
|
first_model_group->addChild(model.get());
|
|
group->addChild(first_model_group);
|
|
|
|
osg::StateSet* ss1 = first_model_group->getOrCreateStateSet();
|
|
|
|
osg::LightModel* lm1 = new osg::LightModel;
|
|
lm1->setAmbientIntensity(ambient);
|
|
ss1->setAttribute(lm1);
|
|
|
|
osg::Light* light1 = new osg::Light;
|
|
light1->setAmbient(ambient);
|
|
light1->setDiffuse(zero_colour);
|
|
light1->setPosition(lightpos);
|
|
ss1->setAttributeAndModes(light1, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
|
|
ss1->setMode(GL_LIGHTING, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
|
|
|
|
}
|
|
|
|
// second group
|
|
{
|
|
// use a camera here just to implement a seperate post rendering stage.
|
|
osg::Camera* camera = new osg::Camera;
|
|
camera->setRenderOrder(osg::Camera::POST_RENDER);
|
|
camera->setClearMask(GL_STENCIL_BUFFER_BIT);
|
|
group->addChild(camera);
|
|
|
|
osg::StateSet* ss_camera = camera->getOrCreateStateSet();
|
|
|
|
osg::Depth* depth = new osg::Depth;
|
|
depth->setWriteMask(false);
|
|
depth->setFunction(osg::Depth::LEQUAL);
|
|
ss_camera->setAttribute(depth);
|
|
|
|
{
|
|
osg::ref_ptr<osg::Geode> geode = new osg::Geode;
|
|
occluder->computeShadowVolumeGeometry(lightpos, *shadowVolume);
|
|
shadowVolume->setDrawMode(drawMode);
|
|
|
|
|
|
if (drawMode == osgShadow::ShadowVolumeGeometry::STENCIL_TWO_SIDED)
|
|
{
|
|
osg::notify(osg::NOTICE)<<"STENCIL_TWO_SIDED seleteced"<<std::endl;
|
|
|
|
osg::StencilTwoSided* stencil = new osg::StencilTwoSided;
|
|
stencil->setFunction(osg::StencilTwoSided::BACK, osg::StencilTwoSided::ALWAYS,0,~0u);
|
|
stencil->setOperation(osg::StencilTwoSided::BACK, osg::StencilTwoSided::KEEP, osg::StencilTwoSided::KEEP, osg::StencilTwoSided::DECR_WRAP);
|
|
stencil->setFunction(osg::StencilTwoSided::FRONT, osg::StencilTwoSided::ALWAYS,0,~0u);
|
|
stencil->setOperation(osg::StencilTwoSided::FRONT, osg::StencilTwoSided::KEEP, osg::StencilTwoSided::KEEP, osg::StencilTwoSided::INCR_WRAP);
|
|
|
|
|
|
osg::ColorMask* colourMask = new osg::ColorMask(false, false, false, false);
|
|
|
|
osg::StateSet* ss_sv1 = geode->getOrCreateStateSet();
|
|
ss_sv1->setRenderBinDetails(0, "RenderBin");
|
|
ss_sv1->setAttributeAndModes(stencil,osg::StateAttribute::ON);
|
|
ss_sv1->setAttribute(colourMask);
|
|
ss_sv1->setMode(GL_CULL_FACE,osg::StateAttribute::OFF);
|
|
|
|
geode->addDrawable(shadowVolume.get());
|
|
|
|
camera->addChild(geode.get());
|
|
|
|
}
|
|
else
|
|
{
|
|
osg::notify(osg::NOTICE)<<"STENCIL_TWO_PASSES seleteced"<<std::endl;
|
|
|
|
osg::Stencil* stencil = new osg::Stencil;
|
|
stencil->setFunction(osg::Stencil::ALWAYS,0,~0u);
|
|
stencil->setOperation(osg::Stencil::KEEP, osg::Stencil::KEEP, osg::Stencil::KEEP);
|
|
|
|
osg::ColorMask* colourMask = new osg::ColorMask(false, false, false, false);
|
|
|
|
osg::StateSet* ss_sv1 = geode->getOrCreateStateSet();
|
|
ss_sv1->setRenderBinDetails(0, "RenderBin");
|
|
ss_sv1->setAttributeAndModes(stencil,osg::StateAttribute::ON);
|
|
ss_sv1->setAttribute(colourMask);
|
|
ss_sv1->setMode(GL_CULL_FACE,osg::StateAttribute::ON);
|
|
|
|
geode->addDrawable(shadowVolume.get());
|
|
|
|
camera->addChild(geode.get());
|
|
}
|
|
|
|
}
|
|
|
|
|
|
// render scene graph adding contribution of light
|
|
{
|
|
osg::Group* second_model_group = new osg::Group;
|
|
second_model_group->addChild(model.get());
|
|
|
|
|
|
osg::StateSet* ss1 = second_model_group->getOrCreateStateSet();
|
|
ss1->setRenderBinDetails(5, "RenderBin");
|
|
|
|
osg::LightModel* lm1 = new osg::LightModel;
|
|
lm1->setAmbientIntensity(zero_colour);
|
|
ss1->setAttribute(lm1);
|
|
|
|
|
|
osg::LightSource* lightsource = new osg::LightSource;
|
|
lightsource->setLight(light.get());
|
|
light->setAmbient(zero_colour);
|
|
light->setDiffuse(diffuse);
|
|
light->setPosition(lightpos);
|
|
second_model_group->addChild(lightsource);
|
|
|
|
ss1->setMode(GL_LIGHT0, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
|
|
|
|
// set up the stencil ops so that only operator on this mirrors stencil value.
|
|
osg::Stencil* stencil = new osg::Stencil;
|
|
stencil->setFunction(osg::Stencil::EQUAL,0,~0u);
|
|
stencil->setOperation(osg::Stencil::KEEP, osg::Stencil::KEEP, osg::Stencil::KEEP);
|
|
ss1->setAttributeAndModes(stencil,osg::StateAttribute::ON);
|
|
|
|
osg::BlendFunc* blend = new osg::BlendFunc;
|
|
blend->setFunction(osg::BlendFunc::ONE, osg::BlendFunc::ONE);
|
|
ss1->setAttributeAndModes(blend, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
|
|
ss1->setMode(GL_LIGHTING, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
|
|
|
|
camera->addChild(second_model_group);
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
viewer.setSceneData(group.get());
|
|
|
|
// create the windows and run the threads.
|
|
viewer.realize();
|
|
|
|
// osgDB::writeNodeFile(*group,"test.osg");
|
|
|
|
while (!viewer.done())
|
|
{
|
|
if (updateLightPosition)
|
|
{
|
|
float t = viewer.getFrameStamp()->getSimulationTime();
|
|
if (postionalLight)
|
|
{
|
|
lightpos.set(bb.center().x()+sinf(t)*bb.radius(), bb.center().y() + cosf(t)*bb.radius(), bb.zMax() + bb.radius() ,1.0f);
|
|
}
|
|
else
|
|
{
|
|
lightpos.set(sinf(t),cosf(t),0.8f,0.0f);
|
|
}
|
|
light->setPosition(lightpos);
|
|
occluder->computeShadowVolumeGeometry(lightpos, *shadowVolume);
|
|
}
|
|
|
|
viewer.frame();
|
|
}
|
|
|
|
return 0;
|
|
}
|