static void VisualizeSeams()
{
if (!CheckNonOptimizedLightmaps())
{
return;
}
var lightmapMappings = GatherLightmaps();
foreach (var lightmapMapping in lightmapMappings)
{
var lightmap = lightmapMapping.lightmap;
var pixels = ReadPixels(lightmap);
List <SeamOptimizer.so_seam_t> seams = new List <SeamOptimizer.so_seam_t>();
foreach (var lightmapMesh in lightmapMapping.meshes)
{
seams.AddRange(SeamOptimizer.so_seams_find(lightmapMesh.mesh, pixels, lightmapMesh.lightmapST, lightmap.width, lightmap.height, 3, cosNormalThreshold));
}
// visualize
var debugPixels = new Color[pixels.Length];
#if false
var seam = seams[4];
#else
foreach (var seam in seams)
#endif
{
var stichingPoint = seam.stitchingPoints;
var texels = seam.texels;
for (int i = 0; i < stichingPoint.capacity; i++)
{
var point = stichingPoint.points[i];
for (int j = 0; j < 2; j++)
{
var side = point.sides[j];
for (int k = 0; k < 4; k++)
{
int idx = side.texels[k].y * lightmap.width + side.texels[k].x;
//Debug.LogFormat("(" + side.texels[k].x + "," + side.texels[k].y + ")" + side.weights[k]);
//Debug.Assert(side.weights[k] > 0);
debugPixels[idx].r += side.weights[k];
}
}
}
// Kanglai: here texels.texels are just texels from stichingPoint.points.side
for (int i = 0; i < texels.capacity; i++)
{
var texel = texels.texels[i];
if (texel.x == -1)
{
continue;
}
int idx = texel.y * lightmap.width + texel.x;
//Debug.LogFormat("(" + texel.x + "," + texel.y + ")");
debugPixels[idx].g += 0.5f;
}
}
var debug = new Texture2D(lightmap.width, lightmap.height, TextureFormat.RGBAFloat, false);
for (int i = 0; i < debugPixels.Length; i++)
{
//if (debugPixels[i].r + debugPixels[i].g < 1e-6)
// debugPixels[i] = pixels[i];
debugPixels[i].a = 1;
}
debug.SetPixels(debugPixels);
debug.Apply();
var filename = AssetDatabase.GetAssetPath(lightmap);
var newfilename = Path.GetDirectoryName(filename) + "/" + Path.GetFileNameWithoutExtension(filename) + "_visualize_seams.exr";
File.WriteAllBytes(newfilename, debug.EncodeToEXR(Texture2D.EXRFlags.CompressZIP));
Object.DestroyImmediate(debug);
}
Debug.Log("Visualize Seams Done");
AssetDatabase.Refresh();
}
static void OptimizeLightmaps()
{
if (!CheckNonOptimizedLightmaps())
{
return;
}
var lightmapMappings = GatherLightmaps();
foreach (var lightmapMapping in lightmapMappings)
{
var lightmap = lightmapMapping.lightmap;
var pixels = ReadPixels(lightmap);
List <SeamOptimizer.so_seam_t> seams = new List <SeamOptimizer.so_seam_t>();
foreach (var lightmapMesh in lightmapMapping.meshes)
{
seams.AddRange(SeamOptimizer.so_seams_find(lightmapMesh.mesh, pixels, lightmapMesh.lightmapST, lightmap.width, lightmap.height, 3, cosNormalThreshold));
}
#if false
var seam = seams[4];
#else
foreach (var seam in seams)
#endif
{
if (!SeamOptimizer.so_seam_optimize(seam, pixels, lightmap.width, lightmap.height, 3, lambda))
{
Debug.LogWarning("Seam Optimize Failed");
}
}
var result = new Texture2D(lightmap.width, lightmap.height, TextureFormat.RGBAFloat, false, true);
result.SetPixels(pixels);
result.Apply();
var filename = AssetDatabase.GetAssetPath(lightmap);
var newfilename = Path.GetDirectoryName(filename) + "/" + Path.GetFileNameWithoutExtension(filename) + optimizedSuffix + ".exr";
File.WriteAllBytes(newfilename, result.EncodeToEXR(Texture2D.EXRFlags.CompressZIP));
Object.DestroyImmediate(result);
Debug.Log("Seam Optimize Done");
AssetDatabase.Refresh();
bool needApply = false;
var tiOld = AssetImporter.GetAtPath(filename) as TextureImporter;
var tiNew = AssetImporter.GetAtPath(newfilename) as TextureImporter;
if (tiNew.textureType != TextureImporterType.Lightmap)
{
tiNew.textureType = TextureImporterType.Lightmap;
needApply = true;
}
if (tiNew.textureCompression != tiOld.textureCompression)
{
tiNew.textureCompression = tiOld.textureCompression;
needApply = true;
}
if (tiNew.anisoLevel != tiOld.anisoLevel)
{
tiNew.anisoLevel = tiOld.anisoLevel;
needApply = true;
}
if (needApply)
{
tiNew.SaveAndReimport();
}
}
}
