private bool AddBlendShape(
string targetShapeName,
string sourceShapeName,
float magnitudeScale,
float yScale,
bool keepLeft,
bool keepRight,
bool keepUpward,
bool keepDownward,
ScaleNormalization scaleNormalization,
int onlyIncludeThisSubmesh,
int onlyExcludeThisSubmesh)
{
if (mesh.GetBlendShapeIndex(targetShapeName) >= 0)
{
// Blend shape already exists. Don't try to add it again.
return(false);
}
Vector3[] deltaVertices = new Vector3[mesh.vertexCount];
Vector3[] deltaNormals = new Vector3[mesh.vertexCount];
Vector3[] deltaTangents = new Vector3[mesh.vertexCount];
// Find the source shape index.
int shapeIndex = FindShapeIndex(sourceShapeName);
if (shapeIndex < 0)
{
// Failed to find the source shape.
return(false);
}
// Copy across the keyframes in the blendshape (most have 1 keyframe).
int frameCount = mesh.GetBlendShapeFrameCount(shapeIndex);
for (int frameIndex = 0; frameIndex < frameCount; frameIndex++)
{
float frameWeight = mesh.GetBlendShapeFrameWeight(shapeIndex, frameIndex);
mesh.GetBlendShapeFrameVertices(shapeIndex, frameIndex, deltaVertices, deltaNormals, deltaTangents);
AdjustBlendShape(deltaVertices, deltaNormals, deltaTangents, magnitudeScale, yScale, keepLeft, keepRight, keepUpward, keepDownward, scaleNormalization, onlyIncludeThisSubmesh, onlyExcludeThisSubmesh);
mesh.AddBlendShapeFrame(targetShapeName, frameWeight, deltaVertices, deltaNormals, deltaTangents);
}
return(true);
}
private void AdjustBlendShape(
Vector3[] deltaVertices,
Vector3[] deltaNormals,
Vector3[] deltaTangents,
float magnitudeScale,
float yScale,
bool keepLeft,
bool keepRight,
bool keepUpward,
bool keepDownward,
ScaleNormalization scaleNormalization,
int onlyIncludeThisSubmesh,
int onlyExcludeThisSubmesh)
{
Vector3[] vertices = mesh.vertices;
Bounds bounds = mesh.bounds;
float minX = bounds.center.x - bounds.extents.x;
float maxX = bounds.center.x + bounds.extents.x;
for (int i = 0; i < mesh.vertexCount; i++)
{
Vector3 v = vertices[i];
Debug.Log("v=" + V3ToString(v) + " dv=" + V3ToString(deltaVertices[i]));
bool zeroIt = false;
if (v.x > 0.0f && !keepRight)
{
zeroIt = true;
Debug.Log("ZA");
}
if (v.x < 0.0f && !keepLeft)
{
zeroIt = true;
Debug.Log("ZB");
}
if (deltaVertices[i].y > 0.0f && !keepUpward)
{
zeroIt = true;
Debug.Log("ZC");
}
if (deltaVertices[i].y < 0.0f && !keepDownward)
{
zeroIt = true;
Debug.Log("ZD");
}
if (zeroIt)
{
deltaVertices[i] = Vector3.zero;
deltaNormals[i] = Vector3.zero;
deltaTangents[i] = Vector3.zero;
}
else
{
Debug.Log("KEEP");
// Adjust the scaling factor based on position on face.
float scaleFactor = magnitudeScale;
switch (scaleNormalization)
{
case ScaleNormalization.LeftToRight:
{
float localScale = (v.x - minX) / (maxX - minX);
Debug.Log("1.v.x=" + v.x + ", minX=" + minX + ", maxX=" + maxX + ", lscale=" + localScale);
if (localScale < 0.0f)
{
localScale = 0.0f;
}
if (localScale > 1.0f)
{
localScale = 1.0f;
}
scaleFactor *= localScale;
break;
}
case ScaleNormalization.RightToLeft:
{
float localScale = (v.x - minX) / (maxX - minX);
Debug.Log("2.v.x=" + v.x + ", minX=" + minX + ", maxX=" + maxX + ", lscale=" + localScale);
if (localScale < 0.0f)
{
localScale = 0.0f;
}
if (localScale > 1.0f)
{
localScale = 1.0f;
}
scaleFactor *= (1.0f - localScale);
break;
}
case ScaleNormalization.ZeroAtCenter:
{
float localScale = v.x / (maxX / 4.0f);
Debug.Log("localScale = " + localScale);
Debug.Log("2.v.x=" + v.x + ", minX=" + minX + ", maxX=" + maxX + ", lscale=" + localScale);
if (localScale < 0.0f)
{
localScale = -localScale;
}
if (localScale > 1.0f)
{
localScale = 1.0f;
}
Debug.Log("final localScale = " + localScale);
scaleFactor *= localScale;
Debug.Log("scaleFactor= " + scaleFactor);
break;
}
}
// Multiply in magnitude scale.
deltaVertices[i] *= scaleFactor;
deltaNormals[i] *= scaleFactor;
deltaTangents[i] *= scaleFactor;
// Multiple in Y scale (e.g. scale = -1 to invert)
deltaVertices[i].y *= yScale;
deltaNormals[i].y *= yScale;
deltaTangents[i].y *= yScale;
}
}
if (onlyIncludeThisSubmesh >= 0)
{
// Set everything to zero not in requested submesh
UnityEngine.Rendering.SubMeshDescriptor smd = mesh.GetSubMesh(onlyIncludeThisSubmesh);
for (int i = 0; i < smd.firstVertex; i++)
{
deltaVertices[i] = Vector3.zero;
deltaNormals[i] = Vector3.zero;
deltaTangents[i] = Vector3.zero;
}
for (int i = smd.firstVertex + smd.vertexCount; i < mesh.vertexCount; i++)
{
deltaVertices[i] = Vector3.zero;
deltaNormals[i] = Vector3.zero;
deltaTangents[i] = Vector3.zero;
}
}
if (onlyExcludeThisSubmesh >= 0)
{
// Set everything to zero in requested submesh
UnityEngine.Rendering.SubMeshDescriptor smd = mesh.GetSubMesh(onlyExcludeThisSubmesh);
for (int i = smd.firstVertex; i < smd.firstVertex + smd.vertexCount; i++)
{
deltaVertices[i] = Vector3.zero;
deltaNormals[i] = Vector3.zero;
deltaTangents[i] = Vector3.zero;
}
}
}
