public static Mesh Combine(MeshFilter[] filters, bool weld)
{
if (filters.Length == 0)
{
Debug.LogError("Mesh list is empty.");
return(null);
}
Transform root = filters[0].transform;
int meshCount = filters.Length;
MeshExtended[] extended = new MeshExtended[meshCount];
for (int m = 0; m < meshCount; m++)
{
MeshFilter filter = filters[m];
extended[m] = new MeshExtended();
extended[m].Prepare(filter.sharedMesh, weld, root, filter.GetComponent <Transform>(), MeshExtended.SizeMethod.Bounds);
}
UVPackerSqr.Box[] boxes = UVPackerSqr.Pack(extended);
Mesh combined = new Mesh();
List <Vector3> combinedVertices = new List <Vector3>();
List <Vector2> combinedUVs = new List <Vector2>();
List <Vector3> combinedNormals = new List <Vector3>();
List <int> combinedTris = new List <int>();
int triOffset = 0;
for (int meshIndex = 0; meshIndex < meshCount; meshIndex++)
{
MeshExtended extmesh = boxes[meshIndex].Extended;
Vector3[] vertices = extmesh.Vertices;
Vector2[] uvs = boxes[meshIndex].PackedUVs;
Vector3[] normals = extmesh.Normals;
int[] triangles = extmesh.Triangles;
int vertexCount = vertices.Length;
int triCount = triangles.Length;
for (int v = 0; v < vertexCount; v++)
{
combinedVertices.Add(vertices[v]);
combinedUVs.Add(uvs[v]);
combinedNormals.Add(normals[v]);
}
for (int t = 0; t < triCount; t++)
{
combinedTris.Add(triangles[t] + triOffset);
}
triOffset = combinedVertices.Count;
}
UVPacker.AdjustSpace(combinedUVs);
combined.SetVertices(combinedVertices);
combined.SetUVs(0, combinedUVs);
combined.SetNormals(combinedNormals);
combined.SetTriangles(combinedTris, 0);
return(combined);
}
public static Box FitUVs(MeshExtended extended, float x, float y, float side)
{
Vector2[] uvs = extended.UVs;
int count = uvs.Length;
Vector2[] packed = new Vector2[count];
float xMin = Mathf.Infinity;
float xMax = -Mathf.Infinity;
float yMin = Mathf.Infinity;
float yMax = -Mathf.Infinity;
foreach (Vector2 v2 in uvs)
{
if (v2.x < xMin)
{
xMin = v2.x;
}
if (v2.x > xMax)
{
xMax = v2.x;
}
if (v2.y < yMin)
{
yMin = v2.y;
}
if (v2.y > yMax)
{
yMax = v2.y;
}
}
float width = xMax - xMin;
float height = yMax - yMin;
// debug:
//float dminx = Mathf.Infinity;
//float dmaxx = -Mathf.Infinity;
//float dminy = Mathf.Infinity;
//float dmaxy = -Mathf.Infinity;
for (int u = 0; u < count; u++)
{
Vector2 uv = uvs[u];
packed[u].x = x + (uv.x - xMin) / width * side;
packed[u].y = y + (uv.y - yMin) / height * side;
// debug:
//if(packed[u].x<dminx) {
// dminx = packed[u].x;
//}
//if(packed[u].x>dmaxx) {
// dmaxx = packed[u].x;
//}
//if(packed[u].y<dminy) {
// dminy = packed[u].y;
//}
//if(packed[u].y>dmaxy) {
// dmaxy = packed[u].y;
//}
}
//debug:
//if(dminx<x || dmaxx>x+side) {
// Debug.Log("sx1="+x+", sx2= "+x+side+", x1="+dminx+", x2="+dmaxx);
//}
//if(dminy<y || dmaxy>y+side) {
// Debug.Log("sy1="+y+", sy2= "+y+side+", y1="+dminy+", y2="+dmaxy);
//}
return(new Box {
Extended = extended, PackedUVs = packed
});
}
