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386 lines
14 KiB
C++
386 lines
14 KiB
C++
#include "riggeometry.hpp"
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#include <unordered_map>
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#include <osg/MatrixTransform>
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#include <osgUtil/CullVisitor>
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#include <components/debug/debuglog.hpp>
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#include <components/resource/scenemanager.hpp>
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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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{
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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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, mData(copy.mData)
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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 (!mData)
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{
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Log(Debug::Error) << "Error: No influence data set on RigGeometry";
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return false;
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}
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mNodes.clear();
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for (const BoneInfo& info : mData->mBones)
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{
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mNodes.push_back(mSkeleton->getBone(info.mName));
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if (!mNodes.back())
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Log(Debug::Error) << "Error: RigGeometry did not find bone " << info.mName;
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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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for (const auto& [influences, vertices] : mData->mInfluences)
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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 (const auto& [index, weight] : influences)
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{
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const Bone* bone = mNodes[index];
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if (bone == nullptr)
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continue;
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osg::Matrixf boneMat = mData->mBones[index].mInvBindMatrix * bone->mMatrixInSkeletonSpace;
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float* boneMatPtr = boneMat.ptr();
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float* resultMatPtr = resultMat.ptr();
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for (int i = 0; i < 16; ++i, ++resultMatPtr, ++boneMatPtr)
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if (i % 4 != 3)
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*resultMatPtr += *boneMatPtr * weight;
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}
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if (mGeomToSkelMatrix)
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resultMat *= (*mGeomToSkelMatrix);
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for (unsigned short vertex : vertices)
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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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size_t index = 0;
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for (const BoneInfo& info : mData->mBones)
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{
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const Bone* bone = mNodes[index++];
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if (bone == nullptr)
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continue;
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osg::BoundingSpheref bs = info.mBoundSphere;
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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::setBoneInfo(std::vector<BoneInfo>&& bones)
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{
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if (!mData)
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mData = new InfluenceData;
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mData->mBones = std::move(bones);
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}
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void RigGeometry::setInfluences(const std::vector<VertexWeights>& influences)
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{
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if (!mData)
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mData = new InfluenceData;
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std::unordered_map<unsigned short, BoneWeights> vertexToInfluences;
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size_t index = 0;
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for (const auto& influence : influences)
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{
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for (const auto& [vertex, weight] : influence)
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vertexToInfluences[vertex].emplace_back(index, weight);
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index++;
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}
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std::map<BoneWeights, VertexList> influencesToVertices;
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for (const auto& [vertex, weights] : vertexToInfluences)
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influencesToVertices[weights].emplace_back(vertex);
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mData->mInfluences.reserve(influencesToVertices.size());
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mData->mInfluences.assign(influencesToVertices.begin(), influencesToVertices.end());
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}
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void RigGeometry::setInfluences(const std::vector<BoneWeights>& influences)
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{
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if (!mData)
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mData = new InfluenceData;
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std::map<BoneWeights, VertexList> influencesToVertices;
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for (size_t i = 0; i < influences.size(); i++)
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influencesToVertices[influences[i]].emplace_back(i);
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mData->mInfluences.reserve(influencesToVertices.size());
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mData->mInfluences.assign(influencesToVertices.begin(), influencesToVertices.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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{
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// The cull visitor won't be applied to the node itself,
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// but we want to use its state to render the child geometry.
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osg::StateSet* stateset = getStateSet();
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osgUtil::CullVisitor* cv = static_cast<osgUtil::CullVisitor*>(&nv);
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if (stateset)
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cv->pushStateSet(stateset);
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cull(&nv);
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if (stateset)
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cv->popStateSet();
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}
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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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