290 lines
11 KiB
C#
290 lines
11 KiB
C#
|
using UnityEngine;
|
||
|
|
using UnityEditor;
|
||
|
|
using UnityEditor.SceneManagement;
|
||
|
|
using System.Collections.Generic;
|
||
|
|
using System.Runtime.InteropServices;
|
||
|
|
|
||
|
|
public class xatlas
|
||
|
|
{
|
||
|
|
//#define UV_HINT
|
||
|
|
|
||
|
|
public static List<Vector2> newUVBuffer;
|
||
|
|
public static List<int> newXrefBuffer;
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern System.IntPtr xatlasCreateAtlas();
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern int xatlasAddMesh(System.IntPtr atlas, int vertexCount, System.IntPtr positions, System.IntPtr normals, System.IntPtr uv, int indexCount, int[] indices32);
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern int xatlasAddUVMesh(System.IntPtr atlas, int vertexCount, System.IntPtr uv, int indexCount, int[] indices32, bool allowRotate);
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern void xatlasParametrize(System.IntPtr atlas);
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern void xatlasPack(System.IntPtr atlas, int attempts, float texelsPerUnit, int resolution, int maxChartSize, int padding, bool bruteForce, bool blockAlign);//, bool allowRotate);
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern void xatlasNormalize(System.IntPtr atlas, int[] atlasSizes, bool preferDensity);
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern int xatlasGetAtlasCount(System.IntPtr atlas);
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern int xatlasGetAtlasIndex(System.IntPtr atlas, int meshIndex, int chartIndex);
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern int xatlasGetVertexCount(System.IntPtr atlas, int meshIndex);
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern int xatlasGetIndexCount(System.IntPtr atlas, int meshIndex);
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern void xatlasGetData(System.IntPtr atlas, int meshIndex, System.IntPtr outUV, System.IntPtr outRef, System.IntPtr outIndices);
|
||
|
|
|
||
|
|
[DllImport ("xatlasLib", CallingConvention=CallingConvention.Cdecl)]
|
||
|
|
public static extern int xatlasClear(System.IntPtr atlas);
|
||
|
|
|
||
|
|
static T[] FillAtrribute<T>(List<int> xrefArray, T[] origArray)
|
||
|
|
{
|
||
|
|
if (origArray == null || origArray.Length == 0) return origArray;
|
||
|
|
|
||
|
|
var arr = new T[xrefArray.Count];
|
||
|
|
for(int i=0; i<xrefArray.Count; i++)
|
||
|
|
{
|
||
|
|
int xref = xrefArray[i];
|
||
|
|
arr[i] = origArray[xref];
|
||
|
|
}
|
||
|
|
return arr;
|
||
|
|
|
||
|
|
/*
|
||
|
|
var finalAttr = new T[vertCount + xrefCount];
|
||
|
|
for(int i=0; i<vertCount; i++) finalAttr[i] = origArray[i];
|
||
|
|
for(int i=0; i<xrefCount; i++) finalAttr[i + vertCount] = origArray[ xrefArray[i] ];
|
||
|
|
return finalAttr;
|
||
|
|
*/
|
||
|
|
}
|
||
|
|
|
||
|
|
public static double GetTime()
|
||
|
|
{
|
||
|
|
return (System.DateTime.Now.Ticks / System.TimeSpan.TicksPerMillisecond) / 1000.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void Unwrap(Mesh m, UnwrapParam uparams)
|
||
|
|
{
|
||
|
|
//EditorUtility.DisplayDialog("Bakery", "xatlas start", "OK");
|
||
|
|
int padding = (int)(uparams.packMargin*1024);
|
||
|
|
//Debug.Log("xatlas! " + padding);
|
||
|
|
|
||
|
|
newUVBuffer = null;
|
||
|
|
newXrefBuffer = null;
|
||
|
|
|
||
|
|
var t = GetTime();
|
||
|
|
|
||
|
|
var positions = m.vertices;
|
||
|
|
var normals = m.normals;
|
||
|
|
var existingUV = m.uv;
|
||
|
|
var handlePos = GCHandle.Alloc(positions, GCHandleType.Pinned);
|
||
|
|
var handleNorm = GCHandle.Alloc(normals, GCHandleType.Pinned);
|
||
|
|
var handleUV = GCHandle.Alloc(existingUV, GCHandleType.Pinned);
|
||
|
|
int err = 0;
|
||
|
|
|
||
|
|
var atlas = xatlasCreateAtlas();
|
||
|
|
|
||
|
|
//EditorUtility.DisplayDialog("Bakery", "xatlas created", "OK");
|
||
|
|
|
||
|
|
try
|
||
|
|
{
|
||
|
|
var pointerPos = handlePos.AddrOfPinnedObject();
|
||
|
|
var pointerNorm = handleNorm.AddrOfPinnedObject();
|
||
|
|
|
||
|
|
#if UV_HINT
|
||
|
|
var pointerUV = handleUV.AddrOfPinnedObject();
|
||
|
|
#else
|
||
|
|
var pointerUV = (System.IntPtr)0;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
for(int i=0; i<m.subMeshCount; i++)
|
||
|
|
{
|
||
|
|
err = xatlasAddMesh(atlas, m.vertexCount, pointerPos, pointerNorm, pointerUV, (int)m.GetIndexCount(i), m.GetIndices(i));
|
||
|
|
if (err == 1)
|
||
|
|
{
|
||
|
|
Debug.LogError("xatlas::AddMesh: indices are out of range");
|
||
|
|
}
|
||
|
|
else if (err == 2)
|
||
|
|
{
|
||
|
|
Debug.LogError("xatlas::AddMesh: index count is incorrect");
|
||
|
|
}
|
||
|
|
else if (err != 0)
|
||
|
|
{
|
||
|
|
Debug.LogError("xatlas::AddMesh: unknown error");
|
||
|
|
}
|
||
|
|
if (err != 0) break;
|
||
|
|
}
|
||
|
|
//EditorUtility.DisplayDialog("Bakery", "xatlas added", "OK");
|
||
|
|
if (err == 0)
|
||
|
|
{
|
||
|
|
xatlasParametrize(atlas);
|
||
|
|
//EditorUtility.DisplayDialog("Bakery", "xatlas param done", "OK");
|
||
|
|
|
||
|
|
xatlasPack(atlas, 4096, 0, 0, 1024, padding, false, true);//, true);
|
||
|
|
//EditorUtility.DisplayDialog("Bakery", "xatlas pack done", "OK");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
finally
|
||
|
|
{
|
||
|
|
if (handlePos.IsAllocated) handlePos.Free();
|
||
|
|
if (handleNorm.IsAllocated) handleNorm.Free();
|
||
|
|
if (handleUV.IsAllocated) handleUV.Free();
|
||
|
|
}
|
||
|
|
if (err != 0)
|
||
|
|
{
|
||
|
|
//EditorUtility.DisplayDialog("Bakery", "xatlas cancel", "OK");
|
||
|
|
xatlasClear(atlas);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
Debug.Log("xatlas time: " + (GetTime() - t));
|
||
|
|
t = GetTime();
|
||
|
|
|
||
|
|
//EditorUtility.DisplayDialog("Bakery", "xatlas unwrap start", "OK");
|
||
|
|
//var uv2 = new Vector2[m.vertexCount];
|
||
|
|
//int vertexOffset = m.vertexCount;
|
||
|
|
//var newUV2 = new List<Vector2>();
|
||
|
|
//var newXref = new List<int>();
|
||
|
|
var indexBuffers = new List<int[]>();
|
||
|
|
|
||
|
|
newUVBuffer = new List<Vector2>();
|
||
|
|
newXrefBuffer = new List<int>();
|
||
|
|
while(newUVBuffer.Count < m.vertexCount)
|
||
|
|
{
|
||
|
|
newUVBuffer.Add(new Vector2(-100, -100));
|
||
|
|
newXrefBuffer.Add(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
xatlasNormalize(atlas, null, false);
|
||
|
|
|
||
|
|
// Collect UVs/xrefs/indices
|
||
|
|
for(int i=0; i<m.subMeshCount; i++)
|
||
|
|
{
|
||
|
|
// Get data from xatlas
|
||
|
|
int newVertCount = xatlasGetVertexCount(atlas, i);
|
||
|
|
int indexCount = xatlasGetIndexCount(atlas, i); // should be unchanged
|
||
|
|
|
||
|
|
var uvBuffer = new Vector2[newVertCount];
|
||
|
|
var xrefBuffer = new int[newVertCount];
|
||
|
|
var indexBuffer = new int[indexCount];
|
||
|
|
|
||
|
|
var handleT = GCHandle.Alloc(uvBuffer, GCHandleType.Pinned);
|
||
|
|
var handleX = GCHandle.Alloc(xrefBuffer, GCHandleType.Pinned);
|
||
|
|
var handleI = GCHandle.Alloc(indexBuffer, GCHandleType.Pinned);
|
||
|
|
|
||
|
|
try
|
||
|
|
{
|
||
|
|
var pointerT = handleT.AddrOfPinnedObject();
|
||
|
|
var pointerX = handleX.AddrOfPinnedObject();
|
||
|
|
var pointerI = handleI.AddrOfPinnedObject();
|
||
|
|
|
||
|
|
xatlasGetData(atlas, i, pointerT, pointerX, pointerI);
|
||
|
|
}
|
||
|
|
finally
|
||
|
|
{
|
||
|
|
if (handleT.IsAllocated) handleT.Free();
|
||
|
|
if (handleX.IsAllocated) handleX.Free();
|
||
|
|
if (handleI.IsAllocated) handleI.Free();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Generate new UV buffer and xatlas->final index mappings
|
||
|
|
var xatlasIndexToNewIndex = new int[newVertCount];
|
||
|
|
for(int j=0; j<newVertCount; j++)
|
||
|
|
{
|
||
|
|
int xref = xrefBuffer[j];
|
||
|
|
Vector2 uv = uvBuffer[j];
|
||
|
|
|
||
|
|
if (newUVBuffer[xref].x < 0)
|
||
|
|
{
|
||
|
|
// first xref encounter gets UV
|
||
|
|
xatlasIndexToNewIndex[j] = xref;
|
||
|
|
newUVBuffer[xref] = uv;
|
||
|
|
newXrefBuffer[xref] = xref;
|
||
|
|
}
|
||
|
|
else if (newUVBuffer[xref].x == uv.x && newUVBuffer[xref].y == uv.y)
|
||
|
|
{
|
||
|
|
// vertex already added
|
||
|
|
xatlasIndexToNewIndex[j] = xref;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// duplicate vertex
|
||
|
|
xatlasIndexToNewIndex[j] = newUVBuffer.Count;
|
||
|
|
newUVBuffer.Add(uv);
|
||
|
|
newXrefBuffer.Add(xref);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Generate final index buffer
|
||
|
|
for(int j=0; j<indexCount; j++)
|
||
|
|
{
|
||
|
|
indexBuffer[j] = xatlasIndexToNewIndex[ indexBuffer[j] ];
|
||
|
|
}
|
||
|
|
indexBuffers.Add(indexBuffer);
|
||
|
|
}
|
||
|
|
|
||
|
|
//EditorUtility.DisplayDialog("Bakery", "xatlas unwrap end", "OK");
|
||
|
|
|
||
|
|
int vertCount = m.vertexCount;
|
||
|
|
|
||
|
|
bool origIs16bit = true;
|
||
|
|
#if UNITY_2017_3_OR_NEWER
|
||
|
|
origIs16bit = m.indexFormat == UnityEngine.Rendering.IndexFormat.UInt16;
|
||
|
|
#endif
|
||
|
|
bool is32bit = newUVBuffer.Count >= 65000;//0xFFFF;
|
||
|
|
if (is32bit && origIs16bit)
|
||
|
|
{
|
||
|
|
Debug.LogError("Unwrap failed: original mesh (" + m.name + ") has 16 bit indices, but unwrapped requires 32 bit.");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Duplicate attributes
|
||
|
|
//if (newXrefBuffer.Count > m.vertexCount) // commented because can be also swapped around
|
||
|
|
{
|
||
|
|
m.vertices = FillAtrribute<Vector3>(newXrefBuffer, positions);
|
||
|
|
m.normals = FillAtrribute<Vector3>(newXrefBuffer, normals);
|
||
|
|
m.boneWeights = FillAtrribute<BoneWeight>(newXrefBuffer, m.boneWeights);
|
||
|
|
m.colors32 = FillAtrribute<Color32>(newXrefBuffer, m.colors32);
|
||
|
|
m.tangents = FillAtrribute<Vector4>(newXrefBuffer, m.tangents);
|
||
|
|
m.uv = FillAtrribute<Vector2>(newXrefBuffer, m.uv);
|
||
|
|
m.uv3 = FillAtrribute<Vector2>(newXrefBuffer, m.uv3);
|
||
|
|
m.uv4 = FillAtrribute<Vector2>(newXrefBuffer, m.uv4);
|
||
|
|
#if UNITY_2018_2_OR_NEWER
|
||
|
|
m.uv5 = FillAtrribute<Vector2>(newXrefBuffer, m.uv5);
|
||
|
|
m.uv6 = FillAtrribute<Vector2>(newXrefBuffer, m.uv6);
|
||
|
|
m.uv7 = FillAtrribute<Vector2>(newXrefBuffer, m.uv7);
|
||
|
|
m.uv8 = FillAtrribute<Vector2>(newXrefBuffer, m.uv8);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
m.uv2 = newUVBuffer.ToArray();
|
||
|
|
|
||
|
|
/*
|
||
|
|
|
||
|
|
// Set new UV2
|
||
|
|
var finalUV2 = new Vector2[vertCount + newUV2.Count];
|
||
|
|
for(int i=0; i<vertCount; i++) finalUV2[i] = uv2[i];
|
||
|
|
for(int i=0; i<newUV2.Count; i++) finalUV2[i + vertCount] = newUV2[i];
|
||
|
|
m.uv2 = finalUV2;
|
||
|
|
*/
|
||
|
|
// Set indices
|
||
|
|
for(int i=0; i<m.subMeshCount; i++)
|
||
|
|
{
|
||
|
|
m.SetTriangles(indexBuffers[i], i);
|
||
|
|
}
|
||
|
|
|
||
|
|
//Debug.Log("post-xatlas mesh building time: " + GetTime() - t));
|
||
|
|
|
||
|
|
xatlasClear(atlas);
|
||
|
|
}
|
||
|
|
}
|