public static TriangleInfo[] GetTriangles(MeshFilter filter)
{
Mesh mesh = filter.sharedMesh;
if (mesh == null)
{
return(null);
}
Vector3[] vertices = mesh.vertices;
int[] tris = mesh.triangles;
TriangleInfo[] triangles = new TriangleInfo[tris.Length / 3];
for (int i = 0; i < tris.Length; i += 3)
{
Vector3 v1 = filter.transform.TransformPoint(vertices[tris[i]]);
Vector3 v2 = filter.transform.TransformPoint(vertices[tris[i + 1]]);
Vector3 v3 = filter.transform.TransformPoint(vertices[tris[i + 2]]);
AABBBoundBox box = new AABBBoundBox(Vector3.positiveInfinity, Vector3.negativeInfinity);
box.Extend(v1);
box.Extend(v2);
box.Extend(v3);
triangles[i / 3] = new TriangleInfo
{
p1 = v1,
p2 = v2,
p3 = v3,
};
}
return(triangles);
}
private TriangleBound GroupBoundBox(List <TriangleInfo> infoList)
{
TriangleBound triangeBound = new TriangleBound();
AABBBoundBox bound = new AABBBoundBox(Vector3.positiveInfinity, Vector3.negativeInfinity);
triangeBound.triangles = new TriangleInfo[infoList.Count];
for (int i = 0; i < infoList.Count; i++)
{
triangeBound.triangles[i] = infoList[i];
bound.Extend(infoList[i].p1);
bound.Extend(infoList[i].p2);
bound.Extend(infoList[i].p3);
}
triangeBound.boundBox = bound;
return(triangeBound);
}