private bool AddOuterUpBlendShape(string targetShapeName, float scaleAsFractionOfFace, bool keepLeft, bool keepRight, int onlyIncludeThisSubmesh)
{
if (mesh.GetBlendShapeIndex(targetShapeName) >= 0)
{
// Blend shape already exists. Don't try to add it again.
return(false);
}
// The mesh extent is from center of face to edge, so multiply by two for total face size.
float maxYOffset = scaleAsFractionOfFace * 2.0f * mesh.bounds.extents.magnitude;
Vector3[] deltaVertices = new Vector3[mesh.vertexCount];
Vector3[] deltaNormals = new Vector3[mesh.vertexCount];
Vector3[] deltaTangents = new Vector3[mesh.vertexCount];
Vector3[] verteces = mesh.vertices;
Bounds bounds = mesh.bounds;
float minX = bounds.center.x - bounds.extents.x;
float maxX = bounds.center.x + bounds.extents.x;
UnityEngine.Rendering.SubMeshDescriptor smd = mesh.GetSubMesh(onlyIncludeThisSubmesh);
for (int i = 0; i < mesh.vertexCount; i++)
{
Vector3 v = verteces[i];
float yOffset = 0.0f;
if (i >= smd.firstVertex && i < smd.firstVertex + smd.vertexCount)
{
if ((v.x <= 0.0f && keepLeft) || (v.x >= 0.0f && keepRight))
{
float localScale = v.x / (maxX / 2.0f);
if (localScale < 0.0f)
{
localScale = -localScale;
}
if (localScale > 1.0f)
{
localScale = 1.0f;
}
yOffset = localScale * maxYOffset;
}
}
deltaVertices[i] = new Vector3(0, yOffset, 0);
deltaNormals[i] = Vector3.zero;
deltaTangents[i] = Vector3.zero;
}
float frameWeight = 100.0f;
mesh.AddBlendShapeFrame(targetShapeName, frameWeight, deltaVertices, deltaNormals, deltaTangents);
return(true);
}
// Find some key points on the face (center of eyes etc)
// These don't have to be exact - they just help normalize the source mesh to the target mesh a bit as eyes, nose, mouth can be different sizes.
private KeyPoints FindKeyPoints(Mesh mesh)
{
// TODO: This assumes sub meshes are at certain places - if VRoid changes, these assumptions may become incorrect.
KeyPoints kp = new KeyPoints();
// Just pick any point in mesh as a relative value for Z so Z does not dominate below because the mouth is further forward in the head.
float baseZ = mesh.vertices[0].z;
// Assume subMesh 0 is the mouth. Find forward left and forward right most points as edges of mouth.
UnityEngine.Rendering.SubMeshDescriptor mouthSmd = mesh.GetSubMesh(SM_MOUTH);
for (int i = mouthSmd.firstVertex; i < mouthSmd.firstVertex + mouthSmd.vertexCount; i++)
{
Vector3 v = mesh.vertices[i];
// Left is +ve X. Forward is +ve Z. We want front left, so add the -X and Z offsets.
if ((v.x + (v.z - baseZ) / 2.0f) > (kp.leftEdgeOfMouth.x + (kp.leftEdgeOfMouth.z - baseZ) / 2.0f))
{
kp.leftEdgeOfMouth = v;
}
// Right is -ve X. Forward is +ve Z. We want front right, so add the X and Z offsets.
if ((-v.x + (v.z - baseZ) / 2.0f) > (-kp.rightEdgeOfMouth.x + (kp.rightEdgeOfMouth.z - baseZ) / 2.0f))
{
kp.rightEdgeOfMouth = v;
}
}
// Just approximate the eye positions.
// TODO: Could do a more accurate estimation by perhaps taking average of all vertices with +ve and -ve X values.
UnityEngine.Rendering.SubMeshDescriptor eyeSmd = mesh.GetSubMesh(SM_EYEWHITES);
kp.centerOfLeftEye = eyeSmd.bounds.center + new Vector3(eyeSmd.bounds.extents.x * 0.75f, 0, 0);
kp.centerOfRightEye = eyeSmd.bounds.center - new Vector3(eyeSmd.bounds.extents.x * 0.75f, 0, 0);
return(kp);
}
private static SubMeshInfo[] LocateSubMeshes(Mesh mesh)
{
var subMeshes = new SubMeshInfo[9];
// For now this is a bit hacky - can improve over time if needed.
// If VRoid character has 9 meshes, then the ears have been merged into the face already.
// If 10 meshes, index 7 and 8 are face and ears - lets merge them together.
// Some tools merge them, so let's work with those tools as well.
int j = 0;
for (int i = 0; i < mesh.subMeshCount; i++)
{
UnityEngine.Rendering.SubMeshDescriptor smd = mesh.GetSubMesh(i);
SubMeshInfo smi = new SubMeshInfo();
smi.name = m_subMeshNames[j];
smi.startIndex = smd.firstVertex; // Or is it indexStart?
smi.endIndex = smd.firstVertex + smd.vertexCount;
smi.bounds = smd.bounds;
// HACK: If size 10, do some magic at index 7 (face) to include following submesh (ears)
// They share the same material and some tools merge them.
// (If VRoid changes the order of subMeshes this will stuff things up big time!)
if (i == 7 && mesh.subMeshCount == 10)
{
i++;
smd = mesh.GetSubMesh(i);
smi.bounds.Encapsulate(smd.bounds);
smi.endIndex = smd.firstVertex + smd.vertexCount;
}
subMeshes[j++] = smi;
}
return(subMeshes);
}
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;
}
}
}