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use bone weights for animation (#1728)

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nathants 2021-04-19 09:26:40 -07:00 committed by GitHub
parent 581bd0eb02
commit 1c45a882f7
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1 changed files with 39 additions and 27 deletions
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src/models.c
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@ -1425,41 +1425,53 @@ void UpdateModelAnimation(Model model, ModelAnimation anim, int frame)
int vCounter = 0;
int boneCounter = 0;
int boneId = 0;
float boneWeight = 0.0;
for (int i = 0; i < model.meshes[m].vertexCount; i++)
{
boneId = model.meshes[m].boneIds[boneCounter];
inTranslation = model.bindPose[boneId].translation;
inRotation = model.bindPose[boneId].rotation;
//inScale = model.bindPose[boneId].scale;
outTranslation = anim.framePoses[frame][boneId].translation;
outRotation = anim.framePoses[frame][boneId].rotation;
outScale = anim.framePoses[frame][boneId].scale;
model.meshes[m].animVertices[vCounter] = 0;
model.meshes[m].animVertices[vCounter + 1] = 0;
model.meshes[m].animVertices[vCounter + 2] = 0;
// Vertices processing
// NOTE: We use meshes.vertices (default vertex position) to calculate meshes.animVertices (animated vertex position)
animVertex = (Vector3){ model.meshes[m].vertices[vCounter], model.meshes[m].vertices[vCounter + 1], model.meshes[m].vertices[vCounter + 2] };
animVertex = Vector3Multiply(animVertex, outScale);
animVertex = Vector3Subtract(animVertex, inTranslation);
animVertex = Vector3RotateByQuaternion(animVertex, QuaternionMultiply(outRotation, QuaternionInvert(inRotation)));
animVertex = Vector3Add(animVertex, outTranslation);
model.meshes[m].animVertices[vCounter] = animVertex.x;
model.meshes[m].animVertices[vCounter + 1] = animVertex.y;
model.meshes[m].animVertices[vCounter + 2] = animVertex.z;
model.meshes[m].animNormals[vCounter] = 0;
model.meshes[m].animNormals[vCounter + 1] = 0;
model.meshes[m].animNormals[vCounter + 2] = 0;
// Normals processing
// NOTE: We use meshes.baseNormals (default normal) to calculate meshes.normals (animated normals)
if (model.meshes[m].normals != NULL)
for (int j = 0; j < 4; j++)
{
animNormal = (Vector3){ model.meshes[m].normals[vCounter], model.meshes[m].normals[vCounter + 1], model.meshes[m].normals[vCounter + 2] };
animNormal = Vector3RotateByQuaternion(animNormal, QuaternionMultiply(outRotation, QuaternionInvert(inRotation)));
model.meshes[m].animNormals[vCounter] = animNormal.x;
model.meshes[m].animNormals[vCounter + 1] = animNormal.y;
model.meshes[m].animNormals[vCounter + 2] = animNormal.z;
}
boneId = model.meshes[m].boneIds[boneCounter];
boneWeight = model.meshes[m].boneWeights[boneCounter];
inTranslation = model.bindPose[boneId].translation;
inRotation = model.bindPose[boneId].rotation;
//inScale = model.bindPose[boneId].scale;
outTranslation = anim.framePoses[frame][boneId].translation;
outRotation = anim.framePoses[frame][boneId].rotation;
outScale = anim.framePoses[frame][boneId].scale;
// Vertices processing
// NOTE: We use meshes.vertices (default vertex position) to calculate meshes.animVertices (animated vertex position)
animVertex = (Vector3){ model.meshes[m].vertices[vCounter], model.meshes[m].vertices[vCounter + 1], model.meshes[m].vertices[vCounter + 2] };
animVertex = Vector3Multiply(animVertex, outScale);
animVertex = Vector3Subtract(animVertex, inTranslation);
animVertex = Vector3RotateByQuaternion(animVertex, QuaternionMultiply(outRotation, QuaternionInvert(inRotation)));
animVertex = Vector3Add(animVertex, outTranslation);
model.meshes[m].animVertices[vCounter] += animVertex.x * boneWeight;
model.meshes[m].animVertices[vCounter + 1] += animVertex.y * boneWeight;
model.meshes[m].animVertices[vCounter + 2] += animVertex.z * boneWeight;
// Normals processing
// NOTE: We use meshes.baseNormals (default normal) to calculate meshes.normals (animated normals)
if (model.meshes[m].normals != NULL)
{
animNormal = (Vector3){ model.meshes[m].normals[vCounter], model.meshes[m].normals[vCounter + 1], model.meshes[m].normals[vCounter + 2] };
animNormal = Vector3RotateByQuaternion(animNormal, QuaternionMultiply(outRotation, QuaternionInvert(inRotation)));
model.meshes[m].animNormals[vCounter] += animNormal.x * boneWeight;
model.meshes[m].animNormals[vCounter + 1] += animNormal.y * boneWeight;
model.meshes[m].animNormals[vCounter + 2] += animNormal.z * boneWeight;
}
boneCounter += 1;
}
vCounter += 3;
boneCounter += 4;
}
// Upload new vertex data to GPU for model drawing