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https://github.com/OpenMW/openmw.git
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415 lines
14 KiB
C++
415 lines
14 KiB
C++
#include "riggeometry.hpp"
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#include <components/debug/debuglog.hpp>
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#include <components/resource/scenemanager.hpp>
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#include <osg/MatrixTransform>
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#include "skeleton.hpp"
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#include "util.hpp"
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namespace
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{
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inline void accumulateMatrix(
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const osg::Matrixf& invBindMatrix, const osg::Matrixf& matrix, const 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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}
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namespace SceneUtil
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{
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RigGeometry::RigGeometry()
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: mSkeleton(nullptr)
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, mLastFrameNumber(0)
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, mBoundsFirstFrame(true)
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{
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setNumChildrenRequiringUpdateTraversal(1);
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// update done in accept(NodeVisitor&)
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}
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RigGeometry::RigGeometry(const RigGeometry& copy, const osg::CopyOp& copyop)
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: Drawable(copy, copyop)
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, mSkeleton(nullptr)
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, mInfluenceMap(copy.mInfluenceMap)
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, mBone2VertexVector(copy.mBone2VertexVector)
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, mBoneSphereVector(copy.mBoneSphereVector)
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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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setNumChildrenRequiringUpdateTraversal(1);
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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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for (unsigned int i = 0; i < 2; ++i)
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mGeometry[i] = nullptr;
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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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// DO NOT COPY AND PASTE THIS CODE. Cloning osg::Geometry without also cloning its contained Arrays is
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// generally unsafe. In this specific case the operation is safe under the following two assumptions:
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// - When Arrays are removed or replaced in the cloned geometry, the original Arrays in their place must
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// outlive the cloned geometry regardless. (ensured by mSourceGeometry)
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// - Arrays that we add or replace in the cloned geometry must be explicitely forbidden from reusing
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// BufferObjects of the original geometry. (ensured by vbo below)
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mGeometry[i] = new osg::Geometry(from, osg::CopyOp::SHALLOW_COPY);
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mGeometry[i]->getOrCreateUserDataContainer()->addUserObject(new Resource::TemplateRef(mSourceGeometry));
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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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to.setComputeBoundingBoxCallback(new CopyBoundingBoxCallback());
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to.setComputeBoundingSphereCallback(new CopyBoundingSphereCallback());
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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
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= static_cast<osg::Array*>(from.getVertexArray()->clone(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
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= static_cast<osg::Array*>(normals->clone(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
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= static_cast<osg::Array*>(tangents->clone(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 = nullptr;
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}
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}
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osg::ref_ptr<osg::Geometry> RigGeometry::getSourceGeometry() const
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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() + 1; it != path.rend(); ++it)
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{
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osg::Node* node = *it;
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if (node->asTransform())
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continue;
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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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Log(Debug::Error) << "Error: A RigGeometry did not find its parent skeleton";
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return false;
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}
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if (!mInfluenceMap)
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{
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Log(Debug::Error) << "Error: No InfluenceMap set on RigGeometry";
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return false;
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}
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mBoneNodesVector.clear();
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for (auto& bonePair : mBoneSphereVector->mData)
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{
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const std::string& boneName = bonePair.first;
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Bone* bone = mSkeleton->getBone(boneName);
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if (!bone)
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{
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mBoneNodesVector.push_back(nullptr);
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Log(Debug::Error) << "Error: RigGeometry did not find bone " << boneName;
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continue;
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}
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mBoneNodesVector.push_back(bone);
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}
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for (auto& pair : mBone2VertexVector->mData)
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{
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for (auto& weight : pair.first)
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{
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const std::string& boneName = weight.first.first;
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Bone* bone = mSkeleton->getBone(boneName);
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if (!bone)
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{
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mBoneNodesVector.push_back(nullptr);
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Log(Debug::Error) << "Error: RigGeometry did not find bone " << boneName;
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continue;
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}
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mBoneNodesVector.push_back(bone);
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}
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}
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return true;
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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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Log(Debug::Error)
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<< "Error: RigGeometry rendering with no skeleton, should have been initialized by UpdateVisitor";
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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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unsigned int traversalNumber = nv->getTraversalNumber();
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if (mLastFrameNumber == traversalNumber || (mLastFrameNumber != 0 && !mSkeleton->getActive()))
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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 = traversalNumber;
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osg::Geometry& geom = *getGeometry(mLastFrameNumber);
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mSkeleton->updateBoneMatrices(traversalNumber);
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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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int index = mBoneSphereVector->mData.size();
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for (auto& pair : mBone2VertexVector->mData)
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{
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osg::Matrixf resultMat(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1);
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for (auto& weight : pair.first)
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{
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Bone* bone = mBoneNodesVector[index];
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if (bone == nullptr)
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continue;
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accumulateMatrix(weight.first.second, bone->mMatrixInSkeletonSpace, weight.second, resultMat);
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index++;
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}
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if (mGeomToSkelMatrix)
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resultMat *= (*mGeomToSkelMatrix);
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for (auto& vertex : pair.second)
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{
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(*positionDst)[vertex] = resultMat.preMult((*positionSrc)[vertex]);
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if (normalDst)
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(*normalDst)[vertex] = osg::Matrixf::transform3x3((*normalSrc)[vertex], resultMat);
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if (tangentDst)
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{
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const osg::Vec4f& srcTangent = (*tangentSrc)[vertex];
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osg::Vec3f transformedTangent = osg::Matrixf::transform3x3(
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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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geom.osg::Drawable::dirtyGLObjects();
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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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int index = 0;
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for (auto& boundPair : mBoneSphereVector->mData)
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{
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Bone* bone = mBoneNodesVector[index];
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if (bone == nullptr)
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continue;
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index++;
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osg::BoundingSpheref bs = boundPair.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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for (unsigned int i = 0; i < 2; ++i)
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{
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osg::Geometry& geom = *mGeometry[i];
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static_cast<CopyBoundingBoxCallback*>(geom.getComputeBoundingBoxCallback())->boundingBox = _boundingBox;
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static_cast<CopyBoundingSphereCallback*>(geom.getComputeBoundingSphereCallback())->boundingSphere
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= _boundingSphere;
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geom.dirtyBound();
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}
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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::RefMatrix* geomToSkelMatrix = mGeomToSkelMatrix;
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if (geomToSkelMatrix)
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geomToSkelMatrix->makeIdentity();
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for (osg::NodePath::const_iterator it = nodePath.begin(); it != nodePath.end() - 1; ++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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osg::MatrixTransform* matrixTrans = trans->asMatrixTransform();
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if (matrixTrans && matrixTrans->getMatrix().isIdentity())
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continue;
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if (!geomToSkelMatrix)
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geomToSkelMatrix = mGeomToSkelMatrix = new osg::RefMatrix;
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trans->computeWorldToLocalMatrix(*geomToSkelMatrix, nullptr);
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}
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}
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}
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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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typedef std::map<unsigned short, std::vector<BoneWeight>> Vertex2BoneMap;
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Vertex2BoneMap vertex2BoneMap;
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mBoneSphereVector = new BoneSphereVector;
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mBoneSphereVector->mData.reserve(mInfluenceMap->mData.size());
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mBone2VertexVector = new Bone2VertexVector;
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for (auto& influencePair : mInfluenceMap->mData)
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{
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const std::string& boneName = influencePair.first;
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const BoneInfluence& bi = influencePair.second;
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mBoneSphereVector->mData.emplace_back(boneName, bi.mBoundSphere);
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for (auto& weightPair : bi.mWeights)
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{
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std::vector<BoneWeight>& vec = vertex2BoneMap[weightPair.first];
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vec.emplace_back(std::make_pair(boneName, bi.mInvBindMatrix), weightPair.second);
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}
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}
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Bone2VertexMap bone2VertexMap;
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for (auto& vertexPair : vertex2BoneMap)
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{
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bone2VertexMap[vertexPair.second].emplace_back(vertexPair.first);
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}
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mBone2VertexVector->mData.reserve(bone2VertexMap.size());
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mBone2VertexVector->mData.assign(bone2VertexMap.begin(), bone2VertexMap.end());
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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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