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339 lines
11 KiB
C++
339 lines
11 KiB
C++
#include "riggeometry.hpp"
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#include <stdexcept>
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#include <iostream>
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#include <cstdlib>
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#include "skeleton.hpp"
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#include "util.hpp"
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namespace SceneUtil
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{
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RigGeometry::RigGeometry()
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: mSkeleton(NULL)
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, mLastFrameNumber(0)
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, mBoundsFirstFrame(true)
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{
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setUpdateCallback(new osg::Callback); // dummy to make sure getNumChildrenRequiringUpdateTraversal() is correct
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// update done in accept(NodeVisitor&)
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}
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RigGeometry::RigGeometry(const RigGeometry ©, const osg::CopyOp ©op)
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: Drawable(copy, copyop)
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, mSkeleton(NULL)
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, mInfluenceMap(copy.mInfluenceMap)
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, mLastFrameNumber(0)
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, mBoundsFirstFrame(true)
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{
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setSourceGeometry(copy.mSourceGeometry);
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}
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void RigGeometry::setSourceGeometry(osg::ref_ptr<osg::Geometry> sourceGeometry)
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{
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mSourceGeometry = sourceGeometry;
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for (unsigned int i=0; i<2; ++i)
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{
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const osg::Geometry& from = *sourceGeometry;
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mGeometry[i] = new osg::Geometry(from, osg::CopyOp::SHALLOW_COPY);
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osg::Geometry& to = *mGeometry[i];
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to.setSupportsDisplayList(false);
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to.setUseVertexBufferObjects(true);
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to.setCullingActive(false); // make sure to disable culling since that's handled by this class
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// vertices and normals are modified every frame, so we need to deep copy them.
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// assign a dedicated VBO to make sure that modifications don't interfere with source geometry's VBO.
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osg::ref_ptr<osg::VertexBufferObject> vbo (new osg::VertexBufferObject);
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vbo->setUsage(GL_DYNAMIC_DRAW_ARB);
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osg::ref_ptr<osg::Array> vertexArray = osg::clone(from.getVertexArray(), osg::CopyOp::DEEP_COPY_ALL);
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if (vertexArray)
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{
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vertexArray->setVertexBufferObject(vbo);
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to.setVertexArray(vertexArray);
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}
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if (const osg::Array* normals = from.getNormalArray())
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{
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osg::ref_ptr<osg::Array> normalArray = osg::clone(normals, osg::CopyOp::DEEP_COPY_ALL);
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if (normalArray)
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{
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normalArray->setVertexBufferObject(vbo);
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to.setNormalArray(normalArray, osg::Array::BIND_PER_VERTEX);
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}
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}
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if (const osg::Vec4Array* tangents = dynamic_cast<const osg::Vec4Array*>(from.getTexCoordArray(7)))
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{
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mSourceTangents = tangents;
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osg::ref_ptr<osg::Array> tangentArray = osg::clone(tangents, osg::CopyOp::DEEP_COPY_ALL);
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tangentArray->setVertexBufferObject(vbo);
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to.setTexCoordArray(7, tangentArray, osg::Array::BIND_PER_VERTEX);
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}
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else
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mSourceTangents = NULL;
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}
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}
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osg::ref_ptr<osg::Geometry> RigGeometry::getSourceGeometry()
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{
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return mSourceGeometry;
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}
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bool RigGeometry::initFromParentSkeleton(osg::NodeVisitor* nv)
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{
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const osg::NodePath& path = nv->getNodePath();
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for (osg::NodePath::const_reverse_iterator it = path.rbegin(); it != path.rend(); ++it)
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{
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osg::Node* node = *it;
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if (Skeleton* skel = dynamic_cast<Skeleton*>(node))
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{
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mSkeleton = skel;
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break;
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}
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}
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if (!mSkeleton)
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{
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std::cerr << "Error: A RigGeometry did not find its parent skeleton" << std::endl;
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return false;
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}
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if (!mInfluenceMap)
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{
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std::cerr << "Error: No InfluenceMap set on RigGeometry" << std::endl;
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return false;
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}
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typedef std::map<unsigned short, std::vector<BoneWeight> > Vertex2BoneMap;
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Vertex2BoneMap vertex2BoneMap;
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for (std::map<std::string, BoneInfluence>::const_iterator it = mInfluenceMap->mMap.begin(); it != mInfluenceMap->mMap.end(); ++it)
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{
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Bone* bone = mSkeleton->getBone(it->first);
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if (!bone)
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{
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std::cerr << "Error: RigGeometry did not find bone " << it->first << std::endl;
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continue;
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}
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mBoneSphereMap[bone] = it->second.mBoundSphere;
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const BoneInfluence& bi = it->second;
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const std::map<unsigned short, float>& weights = it->second.mWeights;
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for (std::map<unsigned short, float>::const_iterator weightIt = weights.begin(); weightIt != weights.end(); ++weightIt)
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{
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std::vector<BoneWeight>& vec = vertex2BoneMap[weightIt->first];
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BoneWeight b = std::make_pair(std::make_pair(bone, bi.mInvBindMatrix), weightIt->second);
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vec.push_back(b);
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}
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}
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for (Vertex2BoneMap::iterator it = vertex2BoneMap.begin(); it != vertex2BoneMap.end(); ++it)
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{
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mBone2VertexMap[it->second].push_back(it->first);
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}
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return true;
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}
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void accumulateMatrix(const osg::Matrixf& invBindMatrix, const osg::Matrixf& matrix, float weight, osg::Matrixf& result)
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{
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osg::Matrixf m = invBindMatrix * matrix;
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float* ptr = m.ptr();
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float* ptrresult = result.ptr();
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ptrresult[0] += ptr[0] * weight;
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ptrresult[1] += ptr[1] * weight;
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ptrresult[2] += ptr[2] * weight;
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ptrresult[4] += ptr[4] * weight;
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ptrresult[5] += ptr[5] * weight;
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ptrresult[6] += ptr[6] * weight;
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ptrresult[8] += ptr[8] * weight;
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ptrresult[9] += ptr[9] * weight;
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ptrresult[10] += ptr[10] * weight;
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ptrresult[12] += ptr[12] * weight;
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ptrresult[13] += ptr[13] * weight;
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ptrresult[14] += ptr[14] * weight;
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}
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void RigGeometry::cull(osg::NodeVisitor* nv)
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{
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if (!mSkeleton)
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{
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std::cerr << "Error: RigGeometry rendering with no skeleton, should have been initialized by UpdateVisitor" << std::endl;
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// try to recover anyway, though rendering is likely to be incorrect.
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if (!initFromParentSkeleton(nv))
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return;
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}
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if ((!mSkeleton->getActive() && mLastFrameNumber != 0) || mLastFrameNumber == nv->getTraversalNumber())
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{
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osg::Geometry& geom = *getGeometry(mLastFrameNumber);
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nv->pushOntoNodePath(&geom);
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nv->apply(geom);
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nv->popFromNodePath();
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return;
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}
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mLastFrameNumber = nv->getTraversalNumber();
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osg::Geometry& geom = *getGeometry(mLastFrameNumber);
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mSkeleton->updateBoneMatrices(nv->getTraversalNumber());
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// skinning
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const osg::Vec3Array* positionSrc = static_cast<osg::Vec3Array*>(mSourceGeometry->getVertexArray());
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const osg::Vec3Array* normalSrc = static_cast<osg::Vec3Array*>(mSourceGeometry->getNormalArray());
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const osg::Vec4Array* tangentSrc = mSourceTangents;
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osg::Vec3Array* positionDst = static_cast<osg::Vec3Array*>(geom.getVertexArray());
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osg::Vec3Array* normalDst = static_cast<osg::Vec3Array*>(geom.getNormalArray());
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osg::Vec4Array* tangentDst = static_cast<osg::Vec4Array*>(geom.getTexCoordArray(7));
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for (Bone2VertexMap::const_iterator it = mBone2VertexMap.begin(); it != mBone2VertexMap.end(); ++it)
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{
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osg::Matrixf resultMat (0, 0, 0, 0,
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0, 0, 0, 0,
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0, 0, 0, 0,
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0, 0, 0, 1);
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for (std::vector<BoneWeight>::const_iterator weightIt = it->first.begin(); weightIt != it->first.end(); ++weightIt)
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{
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Bone* bone = weightIt->first.first;
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const osg::Matrix& invBindMatrix = weightIt->first.second;
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float weight = weightIt->second;
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const osg::Matrixf& boneMatrix = bone->mMatrixInSkeletonSpace;
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accumulateMatrix(invBindMatrix, boneMatrix, weight, resultMat);
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}
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if (mGeomToSkelMatrix)
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resultMat *= (*mGeomToSkelMatrix);
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for (std::vector<unsigned short>::const_iterator vertexIt = it->second.begin(); vertexIt != it->second.end(); ++vertexIt)
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{
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unsigned short vertex = *vertexIt;
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(*positionDst)[vertex] = resultMat.preMult((*positionSrc)[vertex]);
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if (normalDst)
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(*normalDst)[vertex] = osg::Matrix::transform3x3((*normalSrc)[vertex], resultMat);
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if (tangentDst)
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{
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osg::Vec4f srcTangent = (*tangentSrc)[vertex];
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osg::Vec3f transformedTangent = osg::Matrix::transform3x3(osg::Vec3f(srcTangent.x(), srcTangent.y(), srcTangent.z()), resultMat);
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(*tangentDst)[vertex] = osg::Vec4f(transformedTangent, srcTangent.w());
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}
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}
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}
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positionDst->dirty();
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if (normalDst)
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normalDst->dirty();
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if (tangentDst)
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tangentDst->dirty();
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nv->pushOntoNodePath(&geom);
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nv->apply(geom);
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nv->popFromNodePath();
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}
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void RigGeometry::updateBounds(osg::NodeVisitor *nv)
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{
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if (!mSkeleton)
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{
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if (!initFromParentSkeleton(nv))
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return;
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}
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if (!mSkeleton->getActive() && !mBoundsFirstFrame)
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return;
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mBoundsFirstFrame = false;
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mSkeleton->updateBoneMatrices(nv->getTraversalNumber());
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updateGeomToSkelMatrix(nv->getNodePath());
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osg::BoundingBox box;
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for (BoneSphereMap::const_iterator it = mBoneSphereMap.begin(); it != mBoneSphereMap.end(); ++it)
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{
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Bone* bone = it->first;
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osg::BoundingSpheref bs = it->second;
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if (mGeomToSkelMatrix)
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transformBoundingSphere(bone->mMatrixInSkeletonSpace * (*mGeomToSkelMatrix), bs);
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else
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transformBoundingSphere(bone->mMatrixInSkeletonSpace, bs);
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box.expandBy(bs);
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}
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if (box != _boundingBox)
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{
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_boundingBox = box;
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_boundingSphere = osg::BoundingSphere(_boundingBox);
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_boundingSphereComputed = true;
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for (unsigned int i=0; i<getNumParents(); ++i)
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getParent(i)->dirtyBound();
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}
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}
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void RigGeometry::updateGeomToSkelMatrix(const osg::NodePath& nodePath)
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{
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bool foundSkel = false;
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osg::ref_ptr<osg::RefMatrix> geomToSkelMatrix;
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for (osg::NodePath::const_iterator it = nodePath.begin(); it != nodePath.end(); ++it)
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{
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osg::Node* node = *it;
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if (!foundSkel)
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{
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if (node == mSkeleton)
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foundSkel = true;
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}
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else
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{
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if (osg::Transform* trans = node->asTransform())
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{
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if (!geomToSkelMatrix)
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geomToSkelMatrix = new osg::RefMatrix;
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trans->computeWorldToLocalMatrix(*geomToSkelMatrix, NULL);
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}
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}
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}
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if (geomToSkelMatrix && !geomToSkelMatrix->isIdentity())
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mGeomToSkelMatrix = geomToSkelMatrix;
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}
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void RigGeometry::setInfluenceMap(osg::ref_ptr<InfluenceMap> influenceMap)
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{
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mInfluenceMap = influenceMap;
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}
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void RigGeometry::accept(osg::NodeVisitor &nv)
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{
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if (!nv.validNodeMask(*this))
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return;
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nv.pushOntoNodePath(this);
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if (nv.getVisitorType() == osg::NodeVisitor::CULL_VISITOR)
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cull(&nv);
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else if (nv.getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR)
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updateBounds(&nv);
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else
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nv.apply(*this);
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nv.popFromNodePath();
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}
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void RigGeometry::accept(osg::PrimitiveFunctor& func) const
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{
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getGeometry(mLastFrameNumber)->accept(func);
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}
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osg::Geometry* RigGeometry::getGeometry(unsigned int frame) const
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{
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return mGeometry[frame%2].get();
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}
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}
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