/// <summary>
/// UVマップを取得する
/// </summary>
/// <param name="mesh"></param>
/// <param name="subMeshIndex"></param>
/// <param name="texture"></param>
/// <returns></returns>
public Texture2D GenerateUVMap(Mesh mesh, MaterialInfo matInfo)
{
var texture = matInfo.Texture;
var triangles = new List <int>();
foreach (var slotIndex in matInfo.MaterialSlotIndices)
{
triangles.AddRange(mesh.GetTriangles(slotIndex));
}
var uvs = mesh.uv;
if (uvs.Count() <= 0 || triangles.Count() <= 0)
{
return(null);
}
for (int i = 0; i < uvs.Length; i++)
{
uvs[i] = new Vector2(Mathf.Repeat(uvs[i].x, 1.0f), Mathf.Repeat(uvs[i].y, 1.0f));
}
ComputeShader cs = Object.Instantiate(AssetRepository.LoadCreateUVMapComputeShader());
int kernel = cs.FindKernel("CSMain");
var uvMapRT = new RenderTexture(texture.width, texture.height, 0, RenderTextureFormat.ARGB32)
{
enableRandomWrite = true,
anisoLevel = texture.anisoLevel,
mipMapBias = texture.mipMapBias,
filterMode = texture.filterMode,
wrapMode = texture.wrapMode,
wrapModeU = texture.wrapModeU,
wrapModeV = texture.wrapModeV,
wrapModeW = texture.wrapModeW
};
uvMapRT.Create();
var triangleBuffer = new ComputeBuffer(triangles.Count(), sizeof(int));
var uvBuffer = new ComputeBuffer(uvs.Count(), Marshal.SizeOf(typeof(Vector2)));
triangleBuffer.SetData(triangles);
uvBuffer.SetData(uvs);
cs.SetTexture(kernel, CS_VARIABLE_UVMAP, uvMapRT);
cs.SetInt(CS_VARIABLE_WIDTH, texture.width);
cs.SetInt(CS_VARIABLE_HEIGHT, texture.height);
cs.SetBuffer(kernel, CS_VARIABLE_TRIANGLES, triangleBuffer);
cs.SetBuffer(kernel, CS_VARIABLE_UVS, uvBuffer);
cs.Dispatch(kernel, triangles.Count() / 3, 1, 1);
triangleBuffer.Release();
uvBuffer.Release();
Texture2D uvMapTex = new Texture2D(texture.width, texture.height, TextureFormat.RGB24, false)
{
name = texture.name
};
var original = RenderTexture.active;
RenderTexture.active = uvMapRT;
uvMapTex.ReadPixels(new Rect(0, 0, uvMapRT.width, uvMapRT.height), 0, 0);
uvMapTex.Apply();
RenderTexture.active = original;
uvMapRT.Release();
uvMapTexture = uvMapTex;
return(uvMapTex);
}
