/// <summary>
/// Bake all animation clips to texture in format:
/// [clip0[frame0[bone0[row0, row1, row0]..boneN[row0, row1, row0]]..frameM[bone0[row0, row1, row0]..boneN[row0, row1, row0]]]..clipK[..
/// </summary>
/// <returns>BakedData - baked animation matrix to texture</returns>
public static BakedData BakeClips(GameObject prototype, float frameRate = 30f)
{
var go = Object.Instantiate(prototype);
go.transform.localPosition = Vector3.zero;
go.transform.localRotation = Quaternion.identity;
go.SetActive(true);
var skinnedMeshRenderer = go.GetComponentInChildren <SkinnedMeshRenderer>();
var sampledBoneMatrices = SampleAnimationClips(go,
skinnedMeshRenderer,
frameRate,
out var animationClips,
out var numberOfKeyFrames,
out var numberOfBones);
var buffer = new Vector4[numberOfBones * numberOfKeyFrames * MATRIX_ROWS_COUNT];
var bakedDataBuilder = BakedData.Create()
.SetFrameRate(frameRate)
.SetBonesCount(numberOfBones);
var clipOffset = 0;
for (var clipIndex = 0; clipIndex < sampledBoneMatrices.Count; clipIndex++)
{
var framesCount = sampledBoneMatrices[clipIndex].GetLength(0);
for (var keyframeIndex = 0; keyframeIndex < framesCount; keyframeIndex++)
{
var frameOffset = keyframeIndex * numberOfBones * MATRIX_ROWS_COUNT;
for (var boneIndex = 0; boneIndex < numberOfBones; boneIndex++)
{
var index = clipOffset + frameOffset + boneIndex * MATRIX_ROWS_COUNT;
var matrix = sampledBoneMatrices[clipIndex][keyframeIndex, boneIndex];
if (buffer[index + 0] != Vector4.zero)
{
Debug.LogError($"Index {index + 0} not empty");
}
if (buffer[index + 1] != Vector4.zero)
{
Debug.LogError($"Index {index + 1} not empty");
}
if (buffer[index + 2] != Vector4.zero)
{
Debug.LogError($"Index {index + 2} not empty");
}
buffer[index + 0] = matrix.GetRow(0);
buffer[index + 1] = matrix.GetRow(1);
buffer[index + 2] = matrix.GetRow(2);
}
}
var clip = animationClips[clipIndex];
var start = clipOffset;
var clipData = ClipData.Create(clip.name,
clip.length,
clip.wrapMode,
start,
framesCount);
bakedDataBuilder.AddClip(clipData);
clipOffset += framesCount * numberOfBones * MATRIX_ROWS_COUNT;
}
bakedDataBuilder.SetBuffer(buffer);
clipOffset = 0;
for (var clipIndex = 0; clipIndex < sampledBoneMatrices.Count; clipIndex++)
{
var framesCount = sampledBoneMatrices[clipIndex].GetLength(0);
for (var keyframeIndex = 0; keyframeIndex < framesCount; keyframeIndex++)
{
var frameOffset = keyframeIndex * numberOfBones * MATRIX_ROWS_COUNT;
for (var boneIndex = 0; boneIndex < numberOfBones; boneIndex++)
{
var index = clipOffset + frameOffset + boneIndex * MATRIX_ROWS_COUNT;
var matrix = sampledBoneMatrices[clipIndex][keyframeIndex, boneIndex];
var data0 = buffer[index];
var row0 = (Color)matrix.GetRow(0);
index++;
var data1 = buffer[index];
var row1 = (Color)matrix.GetRow(1);
index++;
var data2 = buffer[index];
var row2 = (Color)matrix.GetRow(2);
if (!Verify(row0, data0, clipIndex, keyframeIndex, boneIndex))
{
break;
}
if (!Verify(row1, data1, clipIndex, keyframeIndex, boneIndex))
{
break;
}
if (!Verify(row2, data2, clipIndex, keyframeIndex, boneIndex))
{
break;
}
}
}
clipOffset += numberOfBones * framesCount * MATRIX_ROWS_COUNT;
}
var data = bakedDataBuilder.Build();
go.SetActive(false);
Object.Destroy(go);
return(data);
}
