private static void MorphBoneStretch(LimbDataBone bone, BonePixels bonePixel,
StretchParameters stretchParameters)
{
var boneStartPoint = new Vector2(bone.StartPoint.X, bone.StartPoint.Y);
var boneEndPoint = new Vector2(bone.EndPoint.X, bone.EndPoint.Y);
var boneLength = Vector2.Distance(boneStartPoint, boneEndPoint);
var indices = bonePixel.VertexIndices;
foreach (var vertexIndex in indices)
{
var vertex = GB.LimbDataManager.LimbData.Mesh.Vertices[vertexIndex];
var vertexPoint = new Vector2(vertex.X, vertex.Y);
var vertexWeight = GB.LimbDataManager.LimbData.Mesh.GetVertexWeight(vertex);
var closestPointOnLine3D = Utils.GetClosestPointOnLine(bone.StartPoint, bone.EndPoint,
new Vector3(vertexPoint.X, vertexPoint.Y, 0));
var closestPointOnLine2D = new Vector2(closestPointOnLine3D.X, closestPointOnLine3D.Y);
var progressOnLine = Vector2.Distance(closestPointOnLine2D, boneStartPoint) / boneLength;
if (progressOnLine < 0 || progressOnLine > 1)
{
continue;
}
var distance = Vector2.Distance(vertexPoint, closestPointOnLine2D);
var directionVector = Vector2.Normalize(vertexPoint - closestPointOnLine2D);
var distanceMultiplier = distance / 2f;
var curveScale = 1f + stretchParameters.Power * stretchParameters.Curve.Evaluate(progressOnLine);
vertex.X += curveScale * directionVector.X * stretchParameters.Power * distanceMultiplier *
vertexWeight;
vertex.Y += curveScale * directionVector.Y * stretchParameters.Power * distanceMultiplier *
vertexWeight;
vertex.Z = bone.BoneHash;
GB.LimbDataManager.LimbData.Mesh.Vertices[vertexIndex] = vertex;
}
}
private static void MorphBoneGrow(LimbDataBone bone, BonePixels bonePixel, float scale)
{
var boneStartPoint = new Vector2(bone.StartPoint.X, bone.StartPoint.Y);
var boneEndPoint = new Vector2(bone.EndPoint.X, bone.EndPoint.Y);
var indices = bonePixel.VertexIndices;
foreach (var vertexIndex in indices)
{
var vertex = GB.LimbDataManager.LimbData.Mesh.Vertices[vertexIndex];
var vertexPoint = new Vector2(vertex.X, vertex.Y);
var vertexWeight = GB.LimbDataManager.LimbData.Mesh.GetVertexWeight(vertex);
var distance = Vector2.Distance(vertexPoint, boneEndPoint);
var directionVector = Vector2.Normalize(vertexPoint - boneEndPoint);
vertex.X += distance * directionVector.X * scale * vertexWeight / 2f;
vertex.Y += distance * directionVector.Y * scale * vertexWeight / 2f;
vertex.Z = bone.BoneHash;
GB.LimbDataManager.LimbData.Mesh.Vertices[vertexIndex] = vertex;
}
}