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authorsanine <sanine.not@pm.me>2023-02-12 23:53:22 -0600
committersanine <sanine.not@pm.me>2023-02-12 23:53:22 -0600
commitf1fe73d1909a2448a004a88362a1a532d0d4f7c3 (patch)
treeab37ae3837e2f858de2932bcee9f26e69fab3db1 /libs/assimp/tools/assimp_view/SceneAnimator.cpp
parentf567ea1e2798fd3156a416e61f083ea3e6b95719 (diff)
switch to tinyobj and nanovg from assimp and cairo
Diffstat (limited to 'libs/assimp/tools/assimp_view/SceneAnimator.cpp')
-rw-r--r--libs/assimp/tools/assimp_view/SceneAnimator.cpp235
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diff --git a/libs/assimp/tools/assimp_view/SceneAnimator.cpp b/libs/assimp/tools/assimp_view/SceneAnimator.cpp
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--- a/libs/assimp/tools/assimp_view/SceneAnimator.cpp
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-/*
----------------------------------------------------------------------------
-Open Asset Import Library (assimp)
----------------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the following
-conditions are met:
-
-* Redistributions of source code must retain the above
- copyright notice, this list of conditions and the
- following disclaimer.
-
-* Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the
- following disclaimer in the documentation and/or other
- materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
- contributors may be used to endorse or promote products
- derived from this software without specific prior
- written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
----------------------------------------------------------------------------
-*/
-
-/** @file SceneAnimator.cpp
- * @brief Implementation of the utility class SceneAnimator
- */
-
-#include "assimp_view.h"
-
-using namespace AssimpView;
-
-const aiMatrix4x4 IdentityMatrix;
-
-// ------------------------------------------------------------------------------------------------
-// Constructor for a given scene.
-SceneAnimator::SceneAnimator(const aiScene *pScene, size_t pAnimIndex) :
- mScene(pScene),
- mCurrentAnimIndex(-1),
- mAnimEvaluator(nullptr),
- mRootNode(nullptr) {
- // build the nodes-for-bones table
- for (unsigned int i = 0; i < pScene->mNumMeshes; ++i) {
- const aiMesh *mesh = pScene->mMeshes[i];
- for (unsigned int n = 0; n < mesh->mNumBones; ++n) {
- const aiBone *bone = mesh->mBones[n];
-
- mBoneNodesByName[bone->mName.data] = pScene->mRootNode->FindNode(bone->mName);
- }
- }
-
- // changing the current animation also creates the node tree for this animation
- SetAnimIndex(pAnimIndex);
-}
-
-// ------------------------------------------------------------------------------------------------
-// Destructor
-SceneAnimator::~SceneAnimator() {
- delete mRootNode;
- delete mAnimEvaluator;
-}
-
-// ------------------------------------------------------------------------------------------------
-// Sets the animation to use for playback.
-void SceneAnimator::SetAnimIndex(size_t pAnimIndex) {
- // no change
- if (pAnimIndex == static_cast<unsigned int>(mCurrentAnimIndex)) {
- return;
- }
-
- // kill data of the previous anim
- delete mRootNode;
- mRootNode = nullptr;
- delete mAnimEvaluator;
- mAnimEvaluator = nullptr;
- mNodesByName.clear();
-
- mCurrentAnimIndex = static_cast<int>(pAnimIndex);
-
- // create the internal node tree. Do this even in case of invalid animation index
- // so that the transformation matrices are properly set up to mimic the current scene
- mRootNode = CreateNodeTree(mScene->mRootNode, nullptr);
-
- // invalid anim index
- if (static_cast<unsigned int>(mCurrentAnimIndex) >= mScene->mNumAnimations) {
- return;
- }
-
- // create an evaluator for this animation
- mAnimEvaluator = new AnimEvaluator(mScene->mAnimations[mCurrentAnimIndex]);
-}
-
-// ------------------------------------------------------------------------------------------------
-// Calculates the node transformations for the scene.
-void SceneAnimator::Calculate(double pTime) {
- // invalid anim
- if (!mAnimEvaluator) {
- return;
- }
-
- // calculate current local transformations
- mAnimEvaluator->Evaluate(pTime);
-
- // and update all node transformations with the results
- UpdateTransforms(mRootNode, mAnimEvaluator->GetTransformations());
-}
-
-// ------------------------------------------------------------------------------------------------
-// Retrieves the most recent local transformation matrix for the given node.
-const aiMatrix4x4 &SceneAnimator::GetLocalTransform(const aiNode *node) const {
- NodeMap::const_iterator it = mNodesByName.find(node);
- if (it == mNodesByName.end()) {
- return IdentityMatrix;
- }
-
- return it->second->mLocalTransform;
-}
-
-// ------------------------------------------------------------------------------------------------
-// Retrieves the most recent global transformation matrix for the given node.
-const aiMatrix4x4 &SceneAnimator::GetGlobalTransform(const aiNode *node) const {
- NodeMap::const_iterator it = mNodesByName.find(node);
- if (it == mNodesByName.end()) {
- return IdentityMatrix;
- }
-
- return it->second->mGlobalTransform;
-}
-
-// ------------------------------------------------------------------------------------------------
-// Calculates the bone matrices for the given mesh.
-const std::vector<aiMatrix4x4> &SceneAnimator::GetBoneMatrices(const aiNode *pNode, size_t pMeshIndex /* = 0 */) {
- ai_assert(pMeshIndex < pNode->mNumMeshes);
- size_t meshIndex = pNode->mMeshes[pMeshIndex];
- ai_assert(meshIndex < mScene->mNumMeshes);
- const aiMesh *mesh = mScene->mMeshes[meshIndex];
-
- // resize array and initialize it with identity matrices
- mTransforms.resize(mesh->mNumBones, aiMatrix4x4());
-
- // calculate the mesh's inverse global transform
- aiMatrix4x4 globalInverseMeshTransform = GetGlobalTransform(pNode);
- globalInverseMeshTransform.Inverse();
-
- // Bone matrices transform from mesh coordinates in bind pose to mesh coordinates in skinned pose
- // Therefore the formula is offsetMatrix * currentGlobalTransform * inverseCurrentMeshTransform
- for (size_t a = 0; a < mesh->mNumBones; ++a) {
- const aiBone *bone = mesh->mBones[a];
- const aiMatrix4x4 &currentGlobalTransform = GetGlobalTransform(mBoneNodesByName[bone->mName.data]);
- mTransforms[a] = globalInverseMeshTransform * currentGlobalTransform * bone->mOffsetMatrix;
- }
-
- // and return the result
- return mTransforms;
-}
-
-// ------------------------------------------------------------------------------------------------
-// Recursively creates an internal node structure matching the current scene and animation.
-SceneAnimNode *SceneAnimator::CreateNodeTree(aiNode *pNode, SceneAnimNode *pParent) {
- // create a node
- SceneAnimNode *internalNode = new SceneAnimNode(pNode->mName.data);
- internalNode->mParent = pParent;
- mNodesByName[pNode] = internalNode;
-
- // copy its transformation
- internalNode->mLocalTransform = pNode->mTransformation;
- CalculateGlobalTransform(internalNode);
-
- // find the index of the animation track affecting this node, if any
- if (static_cast<unsigned int>(mCurrentAnimIndex) < mScene->mNumAnimations) {
- internalNode->mChannelIndex = -1;
- const aiAnimation *currentAnim = mScene->mAnimations[mCurrentAnimIndex];
- for (unsigned int a = 0; a < currentAnim->mNumChannels; a++) {
- if (currentAnim->mChannels[a]->mNodeName.data == internalNode->mName) {
- internalNode->mChannelIndex = a;
- break;
- }
- }
- }
-
- // continue for all child nodes and assign the created internal nodes as our children
- for (unsigned int a = 0; a < pNode->mNumChildren; ++a) {
- SceneAnimNode *childNode = CreateNodeTree(pNode->mChildren[a], internalNode);
- internalNode->mChildren.push_back(childNode);
- }
-
- return internalNode;
-}
-
-// ------------------------------------------------------------------------------------------------
-// Recursively updates the internal node transformations from the given matrix array
-void SceneAnimator::UpdateTransforms(SceneAnimNode *pNode, const std::vector<aiMatrix4x4> &pTransforms) {
- // update node local transform
- if (pNode->mChannelIndex != -1) {
- ai_assert(static_cast<unsigned int>(pNode->mChannelIndex) < pTransforms.size());
- pNode->mLocalTransform = pTransforms[pNode->mChannelIndex];
- }
-
- // update global transform as well
- CalculateGlobalTransform(pNode);
-
- // continue for all children
- for (std::vector<SceneAnimNode *>::iterator it = pNode->mChildren.begin(); it != pNode->mChildren.end(); ++it) {
- UpdateTransforms(*it, pTransforms);
- }
-}
-
-// ------------------------------------------------------------------------------------------------
-// Calculates the global transformation matrix for the given internal node
-void SceneAnimator::CalculateGlobalTransform(SceneAnimNode *pInternalNode) {
- // concatenate all parent transforms to get the global transform for this node
- pInternalNode->mGlobalTransform = pInternalNode->mLocalTransform;
- SceneAnimNode *node = pInternalNode->mParent;
- while (node) {
- pInternalNode->mGlobalTransform = node->mLocalTransform * pInternalNode->mGlobalTransform;
- node = node->mParent;
- }
-}