/// <summary>
/// Exports the UV map(s) of the SkinnedMeshRenderer or MeshRenderer
/// </summary>
public static void ExportUVMaps(Renderer rend)
{
bool openedFile = false;
Shader shader = Shader.Find("Hidden/Internal-Colored");
var lineMaterial = new Material(shader);
lineMaterial.hideFlags = HideFlags.HideAndDontSave;
lineMaterial.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
lineMaterial.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
lineMaterial.SetInt("_Cull", (int)UnityEngine.Rendering.CullMode.Off);
lineMaterial.SetInt("_ZWrite", 0);
Mesh mr;
if (rend is MeshRenderer meshRenderer)
{
mr = meshRenderer.GetComponent <MeshFilter>().mesh;
}
else if (rend is SkinnedMeshRenderer skinnedMeshRenderer)
{
mr = skinnedMeshRenderer.sharedMesh;
}
else
{
return;
}
for (int x = 0; x < mr.subMeshCount; x++)
{
var tris = mr.GetTriangles(x);
var uvs = mr.uv;
const int size = 4096;
var _renderTexture = RenderTexture.GetTemporary(size, size);
var lineColor = Color.black;
Graphics.SetRenderTarget(_renderTexture);
GL.PushMatrix();
GL.LoadOrtho();
//GL.LoadPixelMatrix(); // * 2 - 1, maps differently.
GL.Clear(false, true, Color.clear);
lineMaterial.SetPass(0);
GL.Begin(GL.LINES);
GL.Color(lineColor);
for (var i = 0; i < tris.Length; i += 3)
{
var v = uvs[tris[i]];
var n1 = uvs[tris[i + 1]];
var n2 = uvs[tris[i + 2]];
GL.Vertex(v);
GL.Vertex(n1);
GL.Vertex(v);
GL.Vertex(n2);
GL.Vertex(n1);
GL.Vertex(n2);
}
GL.End();
GL.PopMatrix();
Graphics.SetRenderTarget(null);
var png = MaterialEditorPlugin.GetT2D(_renderTexture);
RenderTexture.ReleaseTemporary(_renderTexture);
string filename = Path.Combine(MaterialEditorPlugin.ExportPath, $"{rend.NameFormatted()}_{x}.png");
File.WriteAllBytes(filename, png.EncodeToPNG());
Object.DestroyImmediate(png);
MaterialEditorPlugin.Logger.LogInfo($"Exported {filename}");
if (!openedFile)
{
CC.OpenFileInExplorer(filename);
}
openedFile = true;
}
}