void Animation::UpdateFrameTfs(int frameNum)
{
/*
printf("There are %d Rot %d Loc %d Scal Keys\n",
pAnim->mChannels[0]->mNumRotationKeys,
pAnim->mChannels[0]->mNumPositionKeys,
pAnim->mChannels[0]->mNumScalingKeys);
*/
// Recursively update the transform;
ReadNodeHeirarchy(frameNum, pRootNode, glm::mat4(1.0f));
}
void Mesh::BoneTransform(float TimeInSeconds, vector<Matrix4f>& Transforms)
{
Matrix4f Identity;
Identity.InitIdentity();
float TicksPerSecond = (float)(m_pScene->mAnimations[0]->mTicksPerSecond != 0 ? m_pScene->mAnimations[0]->mTicksPerSecond : 25.0f);
float TimeInTicks = TimeInSeconds * TicksPerSecond;
float AnimationTime = fmod(TimeInTicks, (float)m_pScene->mAnimations[0]->mDuration);
ReadNodeHeirarchy(AnimationTime, m_pScene->mRootNode, Identity);
Transforms.resize(m_NumBones);
for (uint i = 0 ; i < m_NumBones ; i++) {
Transforms[i] = m_BoneInfo[i].FinalTransformation;
}
}
void Mesh::ReadNodeHeirarchy(float AnimationTime, const aiNode* pNode, const Matrix4f& ParentTransform)
{
string NodeName(pNode->mName.data);
const aiAnimation* pAnimation = m_pScene->mAnimations[0];
Matrix4f NodeTransformation(pNode->mTransformation);
const aiNodeAnim* pNodeAnim = FindNodeAnim(pAnimation, NodeName);
if (pNodeAnim) {
// Interpolate scaling and generate scaling transformation matrix
aiVector3D Scaling;
CalcInterpolatedScaling(Scaling, AnimationTime, pNodeAnim);
Matrix4f ScalingM;
ScalingM.InitScaleTransform(Scaling.x, Scaling.y, Scaling.z);
// Interpolate rotation and generate rotation transformation matrix
aiQuaternion RotationQ;
CalcInterpolatedRotation(RotationQ, AnimationTime, pNodeAnim);
Matrix4f RotationM = Matrix4f(RotationQ.GetMatrix());
// Interpolate translation and generate translation transformation matrix
aiVector3D Translation;
CalcInterpolatedPosition(Translation, AnimationTime, pNodeAnim);
Matrix4f TranslationM;
TranslationM.InitTranslationTransform(Translation.x, Translation.y, Translation.z);
// Combine the above transformations
NodeTransformation = TranslationM * RotationM * ScalingM;
}
Matrix4f GlobalTransformation = ParentTransform * NodeTransformation;
if (m_BoneMapping.find(NodeName) != m_BoneMapping.end()) {
uint BoneIndex = m_BoneMapping[NodeName];
m_BoneInfo[BoneIndex].FinalTransformation = m_GlobalInverseTransform * GlobalTransformation * m_BoneInfo[BoneIndex].BoneOffset;
}
for (uint i = 0 ; i < pNode->mNumChildren ; i++) {
ReadNodeHeirarchy(AnimationTime, pNode->mChildren[i], GlobalTransformation);
}
}
void Animation::
ReadNodeHeirarchy(int frameIdx,
const aiNode* pNode,
const glm::mat4& parTf)
{
std::string nodeName(pNode->mName.data);
if (mBoneIdx.find(nodeName) == mBoneIdx.end())
return;
uint32 boneIdx = mBoneIdx[nodeName];
const aiNodeAnim* pAnim = mBoneAnim[boneIdx];
aiVectorKey& sc= pAnim->mScalingKeys[frameIdx % pAnim->mNumScalingKeys];
aiMatrix4x4 matScale;
aiMatrix4x4::Scaling(sc.mValue, matScale);
aiQuatKey& qt = pAnim->mRotationKeys[frameIdx % pAnim->mNumRotationKeys];
aiMatrix4x4 matRotat(qt.mValue.GetMatrix());
aiVectorKey& tr = pAnim->mPositionKeys[frameIdx % pAnim->mNumPositionKeys];
aiMatrix4x4 matTrans;
aiMatrix4x4::Translation(tr.mValue, matTrans);
// Convert from aiMatrix4x4 to glm::mat4
glm::mat4 nodeTf;
CopyMat(matTrans * matRotat * matScale, nodeTf);
glm::mat4 globalTf= parTf * nodeTf;
glm::mat4 finalTf = globalTf * mBoneOffsets[boneIdx];
mBoneFinalTf[boneIdx] = finalTf;
// Print out info
// cout << nodeName << endl;
// pprintMat4x4(finalTf);
// pprintScQtTr(sc.mValue, qt.mValue, tr.mValue);
// pprintMat16(nodeTf);
for(uint i=0; i< pNode->mNumChildren; ++i)
ReadNodeHeirarchy(frameIdx, pNode->mChildren[i], globalTf);
}