public static void RandomiseTriangleOrder(Mesh mesh)
{
var OldTriangles = new List <int> (mesh.triangles);
var NewTriangles = new List <int> ();
using (var Progress = new ScopedProgressBar("Randomising triangle order"))
{
var OriginalTriangleCount = OldTriangles.Count;
// move a random set of indexes to the new list
while (OldTriangles.Count > 0)
{
var TriangleIndex = Random.Range(0, OldTriangles.Count);
TriangleIndex -= TriangleIndex % 3;
if (TriangleIndex % 3 != 0)
{
throw new System.Exception("Picked triangle index not at triangle start");
}
NewTriangles.Add(OldTriangles [TriangleIndex + 0]);
NewTriangles.Add(OldTriangles [TriangleIndex + 1]);
NewTriangles.Add(OldTriangles [TriangleIndex + 2]);
OldTriangles.RemoveRange(TriangleIndex, 3);
Progress.SetProgress("Shuffling", NewTriangles.Count, OriginalTriangleCount, 100);
}
}
mesh.triangles = NewTriangles.ToArray();
}
static public List <Vector2> ExtractPoints(Texture Image)
{
// find the middle of the white pixels
var Texture2 = SaveTextureToPng.GetTexture2D(Image, false);
var Pixels = Texture2.GetPixels();
var MatchColour = Color.white;
System.Func <Color, Color, float> GetColourMatchScore = (Source, Match) =>
{
var Distance = Source.GetHSVDistance(Match);
return(1 - Distance);
};
System.Func <int, int, float> GetWhiteScore = (x, y) =>
{
var i = x + y * Texture2.width;
var Colour = Pixels[i];
return(GetColourMatchScore(Colour, MatchColour));
};
float?BestScore = null;
int BestX = 0, BestY = 0;
using (var Progress = new ScopedProgressBar("Extracting pixel scores"))
{
var NotifyRate = 1;
var maxi = Texture2.height * Texture2.width;
for (int y = 0; y < Texture2.height; y++)
{
for (int x = 0; x < Texture2.width; x++)
{
var i = x + y * Texture2.width;
if (x == 0)
{
Progress.SetProgress("Extracting pixels", i, maxi, NotifyRate);
}
var Score = GetWhiteScore(x, y);
if (!BestScore.HasValue || Score > BestScore.Value && Score > 0)
{
BestScore = Score;
BestX = x;
BestY = y;
}
}
}
}
// convert best to uv
var Bestu = BestX / (float)Texture2.width;
var Bestv = BestY / (float)Texture2.height;
var Points = new List <Vector2>();
Points.Add(new Vector2(Bestu, Bestv));
return(Points);
}
public static void SetMeshUV0ToTriangleIndex(Mesh mesh)
{
var m = mesh;
var TriangleIndexes = m.triangles;
#if UNITY_EDITOR
if (TriangleIndexes.Length != m.vertexCount)
{
var DialogResult = EditorUtility.DisplayDialog("Error", "Assigning triangle indexes to attributes probably won't work as expected for meshes sharing vertexes.", "Continue", "Cancel");
if (!DialogResult)
{
throw new System.Exception("Aborted assignment of UV triangle indexes");
}
}
#endif
using (var Progress = new ScopedProgressBar("Setting UVs")) {
var Uvs = new Vector2[m.vertexCount];
{
var v2 = new Vector2(); // avoid allocs
for (int t = 0; t < TriangleIndexes.Length; t += 3)
{
if (t % 100 == 0)
{
Progress.SetProgress("Setting UV of triangle", t / 3, TriangleIndexes.Length / 3);
}
for (int i = 0; i < 3; i++)
{
var iv = TriangleIndexes [t + i];
v2.x = t / 3;
v2.y = i;
Uvs [iv] = v2;
}
}
}
m.uv = Uvs;
m.UploadMeshData(true);
#if UNTIY_EDITOR
AssetDatabase.SaveAssets();
#endif
}
}
public static void SetMeshUV2ToRandomPerTriangle(MenuCommand menuCommand)
{
var mf = menuCommand.context as MeshFilter;
var m = mf.sharedMesh;
var TriangleIndexes = m.triangles;
if (TriangleIndexes.Length != m.vertexCount)
{
var DialogResult = EditorUtility.DisplayDialog("Error", "Assigning triangle indexes to attributes probably won't work as expected for meshes sharing vertexes.", "Continue", "Cancel");
if (!DialogResult)
{
throw new System.Exception("Aborted assignment of UV triangle indexes");
}
}
using (var Progress = new ScopedProgressBar("Setting UVs")) {
var Uvs = new Vector3[m.vertexCount];
{
var random3 = new Vector3(0, 0, 0);
for (int t = 0; t < TriangleIndexes.Length; t += 3)
{
Progress.SetProgress("Setting UV of triangle", t / 3, TriangleIndexes.Length / 3, 100);
float tTime = t / (float)TriangleIndexes.Length;
random3.x = Mathf.PerlinNoise(tTime, 0.0f);
random3.y = Mathf.PerlinNoise(0.0f, tTime);
random3.z = Random.Range(0.0f, 1.0f);
Uvs [TriangleIndexes [t + 0]] = random3;
Uvs [TriangleIndexes [t + 1]] = random3;
Uvs [TriangleIndexes [t + 2]] = random3;
}
}
m.SetUVs(2, new List <Vector3>(Uvs));
m.UploadMeshData(true);
AssetDatabase.SaveAssets();
}
}
public static void SetMeshUV1ToTriangleBarycentricCoords(MenuCommand menuCommand)
{
var mf = menuCommand.context as MeshFilter;
var m = mf.sharedMesh;
var TriangleIndexes = m.triangles;
if (TriangleIndexes.Length != m.vertexCount)
{
var DialogResult = EditorUtility.DisplayDialog("Error", "Assigning triangle indexes to attributes probably won't work as expected for meshes sharing vertexes.", "Continue", "Cancel");
if (!DialogResult)
{
throw new System.Exception("Aborted assignment of UV triangle indexes");
}
}
using (var Progress = new ScopedProgressBar("Setting UVs")) {
var Uvs = new Vector3[m.vertexCount];
{
var barya = new Vector3(1, 0, 0);
var baryb = new Vector3(0, 1, 0);
var baryc = new Vector3(0, 0, 1);
for (int t = 0; t < TriangleIndexes.Length; t += 3)
{
Progress.SetProgress("Setting UV of triangle", t / 3, TriangleIndexes.Length / 3, 100);
Uvs [TriangleIndexes [t + 0]] = barya;
Uvs [TriangleIndexes [t + 1]] = baryb;
Uvs [TriangleIndexes [t + 2]] = baryc;
}
}
m.SetUVs(1, new List <Vector3>(Uvs));
m.UploadMeshData(true);
AssetDatabase.SaveAssets();
}
}
public static void UnshareTrianglesOfMesh(ref Mesh mesh)
{
var OldTriangles = mesh.triangles;
var OldPositions = mesh.vertices;
var OldNormals = mesh.normals;
var OldUv1s = mesh.uv;
var OldUv2s = mesh.uv2;
var OldUv3s = mesh.uv3;
var OldColourfs = mesh.colors;
var OldColour32s = mesh.colors32;
List <Vector3> NewPositons = NullIfEmpty(OldPositions) != null ? new List <Vector3> () : null;
List <Vector3> NewNormals = NullIfEmpty(OldNormals) != null ? new List <Vector3> () : null;
List <Vector2> NewUv1s = NullIfEmpty(OldUv1s) != null ? new List <Vector2> () : null;
List <Vector2> NewUv2s = NullIfEmpty(OldUv2s) != null ? new List <Vector2> () : null;
List <Vector2> NewUv3s = NullIfEmpty(OldUv3s) != null ? new List <Vector2> () : null;
List <Color> NewColourfs = NullIfEmpty(OldColourfs) != null ? new List <Color> () : null;
List <Color32> NewColour32s = NullIfEmpty(OldColour32s) != null ? new List <Color32> () : null;
List <int> TriangleIndexes = new List <int> ();
bool PromptShown = false;
System.Func <Vertex, Vertex, Vertex, bool> PushTriangle = (a, b, c) => {
// hit limits
if (TriangleIndexes.Count >= 65000 && !PromptShown)
{
#if UNITY_EDITOR
var DialogResult = EditorUtility.DisplayDialogComplex("Error", "Hit vertex limit with " + (TriangleIndexes.Count / 3) + " triangles (" + TriangleIndexes.Count + " vertexes.", "Stop Here", "Abort", "Overflow");
#else
var DialogResult = 1;
#endif
PromptShown = true;
// stop
if (DialogResult == 0)
{
return(false);
}
else if (DialogResult == 2) // continue/overflow
{
}
else if (DialogResult == 1) // abort
{
throw new System.Exception("Aborted export");
}
else
{
throw new System.Exception("unknown dialog result " + DialogResult);
}
}
if (NewPositons != null)
{
NewPositons.Add(a.position);
NewPositons.Add(b.position);
NewPositons.Add(c.position);
}
if (NewNormals != null)
{
NewNormals.Add(a.normal);
NewNormals.Add(b.normal);
NewNormals.Add(c.normal);
}
if (NewUv1s != null)
{
NewUv1s.Add(a.uv1);
NewUv1s.Add(b.uv1);
NewUv1s.Add(c.uv1);
}
if (NewUv2s != null)
{
NewUv2s.Add(a.uv2);
NewUv2s.Add(b.uv2);
NewUv2s.Add(c.uv2);
}
if (NewUv3s != null)
{
NewUv3s.Add(a.uv3);
NewUv3s.Add(b.uv3);
NewUv3s.Add(c.uv3);
}
if (NewColourfs != null)
{
NewColourfs.Add(a.colourf);
NewColourfs.Add(b.colourf);
NewColourfs.Add(c.colourf);
}
if (NewColour32s != null)
{
NewColour32s.Add(a.colour32);
NewColour32s.Add(b.colour32);
NewColour32s.Add(c.colour32);
}
TriangleIndexes.Add(TriangleIndexes.Count);
TriangleIndexes.Add(TriangleIndexes.Count);
TriangleIndexes.Add(TriangleIndexes.Count);
return(true);
};
using (var Progress = new ScopedProgressBar("Splitting mesh"))
{
var va = new Vertex();
var vb = new Vertex();
var vc = new Vertex();
for (int t = 0; t < OldTriangles.Length; t += 3)
{
Progress.SetProgress("Adding triangle", t / 3, OldTriangles.Length / 3, 100);
var ia = OldTriangles [t];
var ib = OldTriangles [t + 1];
var ic = OldTriangles [t + 2];
SafeSet(ref va.position, OldPositions, ia);
SafeSet(ref vb.position, OldPositions, ib);
SafeSet(ref vc.position, OldPositions, ic);
SafeSet(ref va.normal, OldNormals, ia);
SafeSet(ref vb.normal, OldNormals, ib);
SafeSet(ref vc.normal, OldNormals, ic);
SafeSet(ref va.uv1, OldUv1s, ia);
SafeSet(ref vb.uv1, OldUv1s, ib);
SafeSet(ref vc.uv1, OldUv1s, ic);
SafeSet(ref va.uv2, OldUv2s, ia);
SafeSet(ref vb.uv2, OldUv2s, ib);
SafeSet(ref vc.uv2, OldUv2s, ic);
SafeSet(ref va.uv3, OldUv3s, ia);
SafeSet(ref vb.uv3, OldUv3s, ib);
SafeSet(ref vc.uv3, OldUv3s, ic);
SafeSet(ref va.colourf, OldColourfs, ia);
SafeSet(ref vb.colourf, OldColourfs, ib);
SafeSet(ref vc.colourf, OldColourfs, ic);
SafeSet(ref va.colour32, OldColour32s, ia);
SafeSet(ref vb.colour32, OldColour32s, ib);
SafeSet(ref vc.colour32, OldColour32s, ic);
if (!PushTriangle(va, vb, vc))
{
break;
}
}
}
var OldBounds = mesh.bounds;
mesh.Clear();
if (NewPositons != null)
{
mesh.SetVertices(NewPositons);
}
if (NewNormals != null)
{
mesh.SetNormals(NewNormals);
}
if (NewUv1s != null)
{
mesh.SetUVs(0, NewUv1s);
}
if (NewUv2s != null)
{
mesh.SetUVs(1, NewUv2s);
}
if (NewUv3s != null)
{
mesh.SetUVs(1, NewUv3s);
}
if (NewColourfs != null)
{
mesh.SetColors(NewColourfs);
}
if (NewColour32s != null)
{
mesh.SetColors(NewColour32s);
}
if (TriangleIndexes != null)
{
mesh.SetIndices(TriangleIndexes.ToArray(), MeshTopology.Triangles, 0);
}
mesh.bounds = OldBounds;
mesh.UploadMeshData(false);
}