/// <summary>
/// 计算合并贴图 Atlas Rect
/// </summary>
/// <param name="data"></param>
/// <param name="doMultiAtlas"></param>
/// <returns></returns>
public static AtlasPackingResult[] CalculateAtlasRectanglesStatic(TextureCombinePipelineData data, bool doMultiAtlas)
{
List <Vector2> imageSizes = new List <Vector2>();
for (int i = 0; i < data.distinctMaterialTextures.Count; i++)
{
imageSizes.Add(new Vector2(data.distinctMaterialTextures[i].idealWidth, data.distinctMaterialTextures[i].idealHeight));
}
TexturePacker tp = CreateTexturePacker(data.packingAlgorithm);
tp.atlasMustBePowerOfTwo = data.meshBakerTexturePackerForcePowerOfTwo;
List <AtlasPadding> paddings = new List <AtlasPadding>();
for (int i = 0; i < imageSizes.Count; i++)
{
AtlasPadding padding = new AtlasPadding();
padding.topBottom = data.atlasPadding;
padding.leftRight = data.atlasPadding;
if (data.packingAlgorithm == PackingAlgorithmEnum.MeshBakerTexturePacker_Horizontal)
{
padding.leftRight = 0;
}
if (data.packingAlgorithm == PackingAlgorithmEnum.MeshBakerTexturePacker_Vertical)
{
padding.topBottom = 0;
}
paddings.Add(padding);
}
return(tp.GetRects(imageSizes, paddings, data.maxAtlasWidth, data.maxAtlasHeight, doMultiAtlas));
}
public static void CombineMaterial(List <GameObject> gameObjectToCombine, GameObjectCombineSetting setting, TextureCombinePipelineData data)
{
combineData = data;
combineSetting = setting;
CreateCombinedMaterialInfoAsset(gameObjectToCombine);
CreateAtlases(gameObjectToCombine);
}
/// <summary>
/// Texture 合并管线第 3 步，创建 Atlas 并保存资源
/// </summary>
/// <returns></returns>
internal static void Step3_BuildAndSaveAtlasesAndStoreResults(
TextureCombinePipelineData data,
TextureCombineHandler combiner,
ITextureCombineAtlasPacker packer,
AtlasPackingResult atlasPackingResult,
EditorMethodsInterface textureEditorMethods,
AtlasesAndRects resultAtlasesAndRects)
{
//run the garbage collector to free up as much memory as possible before bake to reduce MissingReferenceException problems
GC.Collect();
Texture2D[] atlases = new Texture2D[data.numAtlases];
//StringBuilder report = GenerateReport(data);
//创建图集
packer.CreateAtlases(data, combiner, atlasPackingResult, atlases, textureEditorMethods);
data.nonTexturePropertyBlender.AdjustNonTextureProperties(data.ResultMaterial, data.texPropertyNames, data.distinctMaterialTextures, textureEditorMethods);
if (data.distinctMaterialTextures.Count > 0)
{
data.distinctMaterialTextures[0].AdjustResultMaterialNonTextureProperties(data.ResultMaterial, data.texPropertyNames);
}
List <MaterialAndUVRect> mat2rect_map = new List <MaterialAndUVRect>();
for (int i = 0; i < data.distinctMaterialTextures.Count; i++)
{
MaterialPropTexturesSet texSet = data.distinctMaterialTextures[i];
List <MatAndTransformToMerged> mats = texSet.matsAndGOs.mats;
Rect allPropsUseSameTiling_encapsulatingSamplingRect;
Rect propsUseDifferntTiling_obUVRect;
texSet.GetRectsForTextureBakeResults(out allPropsUseSameTiling_encapsulatingSamplingRect, out propsUseDifferntTiling_obUVRect);
for (int j = 0; j < mats.Count; j++)
{
Rect allPropsUseSameTiling_sourceMaterialTiling = texSet.GetMaterialTilingRectForTextureBakerResults(j);
MaterialAndUVRect key = new MaterialAndUVRect(
mats[j].mat,
atlasPackingResult.rects[i],
texSet.allTexturesUseSameMatTiling,
allPropsUseSameTiling_sourceMaterialTiling,
allPropsUseSameTiling_encapsulatingSamplingRect,
propsUseDifferntTiling_obUVRect,
texSet.tilingTreatment,
mats[j].objName);
if (!mat2rect_map.Contains(key))
{
mat2rect_map.Add(key);
}
}
}
resultAtlasesAndRects.atlases = atlases; // one per texture on result shader
resultAtlasesAndRects.texPropertyNames =
ShaderTextureProperty.GetNames(data.texPropertyNames); // one per texture on source shader
resultAtlasesAndRects.originMatToRect_map = mat2rect_map;
combiner._destroyAllTemporaryTextures();
}
internal static void CreateTemporaryTexturesForAtlas(List <MaterialPropTexturesSet> distinctMaterialTextures,
TextureCombineHandler combiner,
int propIdx,
TextureCombinePipelineData data)
{
for (int texSetIdx = 0; texSetIdx < data.distinctMaterialTextures.Count; texSetIdx++)
{
MaterialPropTexturesSet txs = data.distinctMaterialTextures[texSetIdx];
MaterialPropTexture matTex = txs.ts[propIdx];
if (matTex.isNull)
{
//create a small 16 x 16 texture to use in the atlas
Color col = data.nonTexturePropertyBlender.GetColorForTemporaryTexture(txs.matsAndGOs.mats[0].mat, data.texPropertyNames[propIdx]);
txs.CreateColoredTexToReplaceNull(data.texPropertyNames[propIdx].name, propIdx, data.fixOutOfBoundsUVs, combiner, col);
}
}
}
public virtual void ConvertTexturesToReadableFormats(
TextureCombinePipelineData data,
EditorMethodsInterface textureEditorMethods)
{
for (int i = 0; i < data.distinctMaterialTextures.Count; i++)
{
for (int j = 0; j < data.texPropertyNames.Count; j++)
{
MaterialPropTexture ts = data.distinctMaterialTextures[i].ts[j];
if (!ts.isNull)
{
if (textureEditorMethods != null)
{
Texture tx = ts.GetTexture2D();
textureEditorMethods.AddTextureFormat(
(Texture2D)tx, data.texPropertyNames[j].isNormalMap);
}
}
}
}
}
// texPropertyNames 是 resultMaterial中纹理属性的列表
// allowedMaterialsFilter 是材料列表。 没有这些材料的物体将被忽略。这由多种材质过滤器使用
// textureEditorMethods 仅封装编辑器功能，例如保存资产和跟踪纹理资产谁的格式已更改。 如果在运行时使用，则为null。
static void BeginCombineTexturesIntoAtlases(AtlasesAndRects resultAtlasesAndRects,
TextureCombinePipelineData data,
bool splitAtlasWhenPackingIfTooBig,
EditorMethodsInterface textureEditorMethods)
{
// --- 1、记录各合并物体的源材质的 Prop Texture 信息写入 Data.distinctMaterialTextures
//每个图集（主图，凹凸等）都将有的 MaterialTextures.Count 个图像。
//每个 distinctMaterialTextures 对应一个游戏物体的某个材质，记录一组纹理，分别材质的在每个Prop图集一个。
List <GameObject> usedObjsToMesh = new List <GameObject>();
TextureCombinePipeline.Step1_CollectDistinctMatTexturesAndUsedObjects(
data, textureEditorMethods, usedObjsToMesh);
// --- 2、计算使每个材质属性中的多个材质的合理尺寸
TextureCombinePipeline.Step2_CalculateIdealSizesForTexturesInAtlasAndPadding(
data, textureEditorMethods);
// --- 3、创建特定打包方式的打包器
ITextureCombineAtlasPacker texturePaker = CreateAtlasPacker(
data.IsOnlyOneTextureInAtlasReuseTextures(),
data.packingAlgorithm);
texturePaker.ConvertTexturesToReadableFormats(data, textureEditorMethods);
// --- 4、计算各源材质在合并材质 Atlas 的排布
AtlasPackingResult[] uvRects = texturePaker.CalculateAtlasRectangles(
data, splitAtlasWhenPackingIfTooBig);
// --- 5、创建 Atlas 并保存
TextureCombinePipeline.Step3_BuildAndSaveAtlasesAndStoreResults(
data,
null,
texturePaker,
uvRects[0],
textureEditorMethods,
resultAtlasesAndRects);
}
public virtual AtlasPackingResult[] CalculateAtlasRectangles(TextureCombinePipelineData data, bool doMultiAtlas)
{
return(CalculateAtlasRectanglesStatic(data, doMultiAtlas));
}
public abstract void CreateAtlases(TextureCombinePipelineData data,
TextureCombineHandler combiner,
AtlasPackingResult packedAtlasRects,
Texture2D[] atlases,
EditorMethodsInterface textureEditorMethods);
private static TextureCombinePipelineData CreateCombineData(GameObjectCombineSetting setting)
{
var newCombineData = new TextureCombinePipelineData();
return(newCombineData);
}
//第二步：计算每个材质的属性对应的 Textures 统一尺寸
//每种材质（_mainTex，凹凸，Spec ect ...）中的纹理必须大小相同
//计算要使用的最佳尺寸。 考虑平铺
//如果图集中只有一种纹理会使用原始大小
internal static void Step2_CalculateIdealSizesForTexturesInAtlasAndPadding(
TextureCombinePipelineData data,
EditorMethodsInterface textureEditorMethods)
{
MaterialPropTexture.readyToBuildAtlases = true;
data.allTexturesAreNullAndSameColor = CalculateAllTexturesAreNullAndSameColor(data);
//计算 atlas 矩形尺寸
int padding = data.atlasPadding;
if (data.distinctMaterialTextures.Count == 1 && data.fixOutOfBoundsUVs == false && data.considerNonTextureProperties == false)
{
Debug.Log("所有游戏物体使用相同的材质.将使用 Original textures .");
padding = 0;
data.distinctMaterialTextures[0].SetThisIsOnlyTexSetInAtlasTrue();
data.distinctMaterialTextures[0].SetTilingTreatmentAndAdjustEncapsulatingSamplingRect(TextureTilingTreatment.edgeToEdgeXY);
}
Debug.Assert(data.allTexturesAreNullAndSameColor.Length == data.texPropertyNames.Count,
"allTexturesAreNullAndSameColor array must be the same length of texPropertyNames.");
for (int i = 0; i < data.distinctMaterialTextures.Count; i++)
{
Debug.Log("为 TexSet " + i + " of " + data.distinctMaterialTextures.Count + "计算合适的尺寸");
MaterialPropTexturesSet txs = data.distinctMaterialTextures[i];
txs.idealWidth = 1;
txs.idealHeight = 1;
int tWidth = 1;
int tHeight = 1;
Debug.Assert(txs.ts.Length == data.texPropertyNames.Count,
"length of arrays in each element of distinctMaterialTextures must be texPropertyNames.Count");
//在 MaterialPropTexturesSet 中所有 MaterialPropTextures 应为相同尺寸
for (int propIdx = 0; propIdx < data.texPropertyNames.Count; propIdx++)
{
if (ShouldWeCreateAtlasForThisProperty(propIdx, data.considerNonTextureProperties, data.allTexturesAreNullAndSameColor))
{
MaterialPropTexture matTex = txs.ts[propIdx];
Debug.Log(string.Format("为 texSet {0} ，property {1} 计算合适尺寸", i, data.texPropertyNames[propIdx].name));
if (!matTex.matTilingRect.size.Equals(Vector2.one) && data.distinctMaterialTextures.Count > 1)
{
Debug.LogWarning("Texture " + matTex.GetTexName() + "is tiled by " +
matTex.matTilingRect.size + " tiling will be baked into a texture with maxSize:" +
data.maxTilingBakeSize);
}
if (!txs.obUVscale.Equals(Vector2.one) && data.distinctMaterialTextures.Count > 1 && data.fixOutOfBoundsUVs)
{
Debug.LogWarning("Texture " + matTex.GetTexName() +
" has out of bounds UVs that effectively tile by " + txs.obUVscale +
" tiling will be baked into a texture with maxSize:" + data.maxTilingBakeSize);
}
if (matTex.isNull)
{
txs.SetEncapsulatingRect(propIdx, data.fixOutOfBoundsUVs);
Debug.Log(string.Format("No source texture creating a 16x16 texture for {0} texSet {1} srcMat {2}",
data.texPropertyNames[propIdx].name, i, txs.matsAndGOs.mats[0].GetMaterialName()));
}
if (!matTex.isNull)
{
Vector2 dim = GetAdjustedForScaleAndOffset2Dimensions(matTex, txs.obUVoffset, txs.obUVscale, data);
if ((int)(dim.x * dim.y) > tWidth * tHeight)
{
Debug.Log(" 材质texture " + matTex.GetTexName() + " " + dim + " 需要比" + tWidth + " " + tHeight + "更大的尺寸");
tWidth = (int)dim.x;
tHeight = (int)dim.y;
}
}
}
}
if (data.resizePowerOfTwoTextures)
{
if (tWidth <= padding * 5)
{
Debug.LogWarning(String.Format("Some of the textures have widths close to the size of the padding. " +
"It is not recommended to use _resizePowerOfTwoTextures with widths this small.", txs.ToString()));
}
if (tHeight <= padding * 5)
{
Debug.LogWarning(String.Format("Some of the textures have heights close to the size of the padding. " +
"It is not recommended to use _resizePowerOfTwoTextures with heights this small.", txs.ToString()));
}
if (IsPowerOfTwo(tWidth))
{
tWidth -= padding * 2;
}
if (IsPowerOfTwo(tHeight))
{
tHeight -= padding * 2;
}
if (tWidth < 1)
{
tWidth = 1;
}
if (tHeight < 1)
{
tHeight = 1;
}
}
Debug.Log("Ideal size is " + tWidth + " " + tHeight);
txs.idealWidth = tWidth;
txs.idealHeight = tHeight;
}
data.atlasPadding = padding;
}
public TextureCombiner()
{
combineData = new TextureCombinePipelineData();
}
internal static Vector2 GetAdjustedForScaleAndOffset2Dimensions(MaterialPropTexture source, Vector2 obUVoffset, Vector2 obUVscale, TextureCombinePipelineData data)
{
if (source.matTilingRect.x == 0f && source.matTilingRect.y == 0f && source.matTilingRect.width == 1f && source.matTilingRect.height == 1f)
{
if (data.fixOutOfBoundsUVs)
{
if (obUVoffset.x == 0f && obUVoffset.y == 0f && obUVscale.x == 1f && obUVscale.y == 1f)
{
return(new Vector2(source.width, source.height)); //no adjustment necessary
}
}
else
{
return(new Vector2(source.width, source.height)); //no adjustment necessary
}
}
Debug.Log("GetAdjustedForScaleAndOffset2Dimensions: " + source.GetTexName() + " " + obUVoffset + " " + obUVscale);
Rect encapsulatingSamplingRect = source.GetEncapsulatingSamplingRect().GetRect();
float newWidth = encapsulatingSamplingRect.width * source.width;
float newHeight = encapsulatingSamplingRect.height * source.height;
if (newWidth > data.maxTilingBakeSize)
{
newWidth = data.maxTilingBakeSize;
}
if (newHeight > data.maxTilingBakeSize)
{
newHeight = data.maxTilingBakeSize;
}
if (newWidth < 1f)
{
newWidth = 1f;
}
if (newHeight < 1f)
{
newHeight = 1f;
}
return(new Vector2(newWidth, newHeight));
}
//public static bool TextureCombineEntrance(TextureCombinePipelineData combineData,
// AtlasesAndRects resultAtlasesAndRectsData,
// Material resultMaterial)
//{
// bool isCombineSuccess = false;
// MaterialPropTexture.readyToBuildAtlases = false;
// return isCombineSuccess;
//}
/// <summary>
/// 收集材质参数名称
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
internal static bool CollectPropertyNames(TextureCombinePipelineData data)
{
//try custom properties remove duplicates
//尝试删除自定义属性的重复项
for (int i = 0; i < data.texPropertyNames.Count; i++)
{
ShaderTextureProperty s = data.customShaderPropNames.Find(x => x.name.Equals(data.texPropertyNames[i].name));
if (s != null)
{
data.customShaderPropNames.Remove(s);
}
}
Material m = data.ResultMaterial;
if (m == null)
{
Debug.LogError("合并材质为空。");
return(false);
}
//Collect the property names for the textures
for (int i = 0; i < shaderTexPropertyNames.Length; i++)
{
if (m.HasProperty(shaderTexPropertyNames[i].name))
{
if (!data.texPropertyNames.Contains(shaderTexPropertyNames[i]))
{
data.texPropertyNames.Add(shaderTexPropertyNames[i]);
}
if (m.GetTextureOffset(shaderTexPropertyNames[i].name) != new Vector2(0f, 0f))
{
Debug.LogWarning("Result material has non-zero offset. This is may be incorrect.");
}
if (m.GetTextureScale(shaderTexPropertyNames[i].name) != new Vector2(1f, 1f))
{
Debug.LogWarning("Result material should have tiling of 1,1");
}
}
}
for (int i = 0; i < data.customShaderPropNames.Count; i++)
{
if (m.HasProperty(data.customShaderPropNames[i].name))
{
data.texPropertyNames.Add(data.customShaderPropNames[i]);
if (m.GetTextureOffset(data.customShaderPropNames[i].name) != new Vector2(0f, 0f))
{
Debug.LogWarning("Result material has non-zero offset. This is probably incorrect.");
}
if (m.GetTextureScale(data.customShaderPropNames[i].name) != new Vector2(1f, 1f))
{
Debug.LogWarning("Result material should probably have tiling of 1,1.");
}
}
else
{
Debug.LogWarning("Result material shader does not use property " +
data.customShaderPropNames[i].name + " in the list of custom shader property names");
}
}
return(true);
}
/// <summary>
/// 检测所有 textures 中只有一种纹理
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
private static CreateAtlasForProperty[] CalculateAllTexturesAreNullAndSameColor(TextureCombinePipelineData data)
{
// check if all textures are null and use same color for each atlas
// will not generate an atlas if so
CreateAtlasForProperty[] shouldWeCreateAtlasForProp = new CreateAtlasForProperty[data.texPropertyNames.Count];
for (int propIdx = 0; propIdx < data.texPropertyNames.Count; propIdx++)
{
MaterialPropTexture firstTexture = data.distinctMaterialTextures[0].ts[propIdx];
Color firstColor = Color.black;
if (data.considerNonTextureProperties)
{
firstColor = data.nonTexturePropertyBlender.GetColorAsItWouldAppearInAtlasIfNoTexture(
data.distinctMaterialTextures[0].matsAndGOs.mats[0].mat,
data.texPropertyNames[propIdx]);
}
int numTexturesExisting = 0;
int numTexturesMatchinFirst = 0;
int numNonTexturePropertiesMatchingFirst = 0;
for (int j = 0; j < data.distinctMaterialTextures.Count; j++)
{
if (!data.distinctMaterialTextures[j].ts[propIdx].isNull)
{
numTexturesExisting++;
}
if (firstTexture.AreTexturesEqual(data.distinctMaterialTextures[j].ts[propIdx]))
{
numTexturesMatchinFirst++;
}
if (data.considerNonTextureProperties)
{
Color colJ = data.nonTexturePropertyBlender.GetColorAsItWouldAppearInAtlasIfNoTexture(data.distinctMaterialTextures[j].matsAndGOs.mats[0].mat, data.texPropertyNames[propIdx]);
if (colJ == firstColor)
{
numNonTexturePropertiesMatchingFirst++;
}
}
}
shouldWeCreateAtlasForProp[propIdx].allTexturesAreNull = numTexturesExisting == 0;
shouldWeCreateAtlasForProp[propIdx].allTexturesAreSame = numTexturesMatchinFirst == data.distinctMaterialTextures.Count;
shouldWeCreateAtlasForProp[propIdx].allNonTexturePropsAreSame = numNonTexturePropertiesMatchingFirst == data.distinctMaterialTextures.Count;
Debug.Log(string.Format("AllTexturesAreNullAndSameColor prop: {0} createAtlas:{1} val:{2}",
data.texPropertyNames[propIdx].name,
ShouldWeCreateAtlasForThisProperty(propIdx, data.considerNonTextureProperties, shouldWeCreateAtlasForProp),
shouldWeCreateAtlasForProp[propIdx]));
}
return(shouldWeCreateAtlasForProp);
}
internal static void CopyScaledAndTiledToAtlas(MaterialPropTexture source,
MaterialPropTexturesSet sourceMaterial,
ShaderTextureProperty shaderPropertyName,
DRect srcSamplingRect,
int targX, int targY, int targW, int targH,
AtlasPadding padding,
Color[][] atlasPixels, bool isNormalMap,
TextureCombinePipelineData data,
TextureCombineHandler combiner)
{
//HasFinished = false;
Texture2D t = source.GetTexture2D();
Debug.Log(string.Format("CopyScaledAndTiledToAtlas: {0} inAtlasX={1} inAtlasY={2} inAtlasW={3} inAtlasH={4} paddX={5} paddY={6} srcSamplingRect={7}",
t, targX, targY, targW, targH, padding.leftRight, padding.topBottom, srcSamplingRect));
float newWidth = targW;
float newHeight = targH;
float scx = (float)srcSamplingRect.width;
float scy = (float)srcSamplingRect.height;
float ox = (float)srcSamplingRect.x;
float oy = (float)srcSamplingRect.y;
int w = (int)newWidth;
int h = (int)newHeight;
if (data.considerNonTextureProperties)
{
t = combiner._createTextureCopy(shaderPropertyName.name, t);
t = data.nonTexturePropertyBlender.TintTextureWithTextureCombiner(t, sourceMaterial, shaderPropertyName);
}
for (int i = 0; i < w; i++)
{
for (int j = 0; j < h; j++)
{
float u = i / newWidth * scx + ox;
float v = j / newHeight * scy + oy;
atlasPixels[targY + j][targX + i] = t.GetPixelBilinear(u, v);
}
}
//bleed the border colors into the padding
for (int i = 0; i < w; i++)
{
for (int j = 1; j <= padding.topBottom; j++)
{
//top margin
atlasPixels[(targY - j)][targX + i] = atlasPixels[(targY)][targX + i];
//bottom margin
atlasPixels[(targY + h - 1 + j)][targX + i] = atlasPixels[(targY + h - 1)][targX + i];
}
}
for (int j = 0; j < h; j++)
{
for (int i = 1; i <= padding.leftRight; i++)
{
//left margin
atlasPixels[(targY + j)][targX - i] = atlasPixels[(targY + j)][targX];
//right margin
atlasPixels[(targY + j)][targX + w + i - 1] = atlasPixels[(targY + j)][targX + w - 1];
}
}
//corners
for (int i = 1; i <= padding.leftRight; i++)
{
for (int j = 1; j <= padding.topBottom; j++)
{
atlasPixels[(targY - j)][targX - i] = atlasPixels[targY][targX];
atlasPixels[(targY + h - 1 + j)][targX - i] = atlasPixels[(targY + h - 1)][targX];
atlasPixels[(targY + h - 1 + j)][targX + w + i - 1] = atlasPixels[(targY + h - 1)][targX + w - 1];
atlasPixels[(targY - j)][targX + w + i - 1] = atlasPixels[targY][targX + w - 1];
}
}
}
public override void CreateAtlases(
TextureCombinePipelineData data,
TextureCombineHandler combiner,
AtlasPackingResult packedAtlasRects,
Texture2D[] atlases,
EditorMethodsInterface textureEditorMethods)
{
Rect[] uvRects = packedAtlasRects.rects;
int atlasSizeX = packedAtlasRects.atlasX;
int atlasSizeY = packedAtlasRects.atlasY;
Debug.Log("Generated atlas will be " + atlasSizeX + "x" + atlasSizeY);
for (int propIdx = 0; propIdx < data.numAtlases; propIdx++)
{
Texture2D atlas = null;
ShaderTextureProperty property = data.texPropertyNames[propIdx];
if (!TextureCombinePipeline.ShouldWeCreateAtlasForThisProperty(propIdx, data.considerNonTextureProperties, data.allTexturesAreNullAndSameColor))
{
atlas = null;
Debug.Log("=== Not creating atlas for " + property.name + " because textures are null and default value parameters are the same.");
}
else
{
Debug.Log("=== Creating atlas for " + property.name);
GC.Collect();
CreateTemporaryTexturesForAtlas(data.distinctMaterialTextures, combiner, propIdx, data);
//use a jagged array because it is much more efficient in memory
Color[][] atlasPixels = new Color[atlasSizeY][];
for (int j = 0; j < atlasPixels.Length; j++)
{
atlasPixels[j] = new Color[atlasSizeX];
}
bool isNormalMap = false;
if (property.isNormalMap)
{
isNormalMap = true;
}
for (int texSetIdx = 0; texSetIdx < data.distinctMaterialTextures.Count; texSetIdx++)
{
MaterialPropTexturesSet texSet = data.distinctMaterialTextures[texSetIdx];
MaterialPropTexture matTex = texSet.ts[propIdx];
string s = "Creating Atlas '" + property.name + "' texture " + matTex.GetTexName();
Debug.Log(string.Format("Adding texture {0} to atlas {1} for texSet {2} srcMat {3}", matTex.GetTexName(), property.name, texSetIdx, texSet.matsAndGOs.mats[0].GetMaterialName()));
Rect r = uvRects[texSetIdx];
Texture2D t = texSet.ts[propIdx].GetTexture2D();
int x = Mathf.RoundToInt(r.x * atlasSizeX);
int y = Mathf.RoundToInt(r.y * atlasSizeY);
int ww = Mathf.RoundToInt(r.width * atlasSizeX);
int hh = Mathf.RoundToInt(r.height * atlasSizeY);
if (ww == 0 || hh == 0)
{
Debug.LogError("Image in atlas has no height or width " + r);
}
if (textureEditorMethods != null)
{
textureEditorMethods.SetReadWriteFlag(t, true, true);
}
DRect samplingRect = texSet.ts[propIdx].GetEncapsulatingSamplingRect();
CopyScaledAndTiledToAtlas(texSet.ts[propIdx],
texSet,
property,
samplingRect,
x,
y,
ww,
hh,
packedAtlasRects.padding[texSetIdx],
atlasPixels,
isNormalMap,
data,
combiner);
}
atlas = new Texture2D(atlasSizeX, atlasSizeY, TextureFormat.ARGB32, true);
for (int j = 0; j < atlasPixels.Length; j++)
{
atlas.SetPixels(0, j, atlasSizeX, 1, atlasPixels[j]);
}
atlas.Apply();
Debug.Log("Saving atlas " + property.name + " w=" + atlas.width + " h=" + atlas.height);
}
atlases[propIdx] = atlas;
if (data.saveAtlasesAsAssets && textureEditorMethods != null)
{
textureEditorMethods.SaveAtlasToAssetDatabase(atlases[propIdx], data.texPropertyNames[propIdx], propIdx, data.ResultMaterial);
}
else
{
data.ResultMaterial.SetTexture(data.texPropertyNames[propIdx].name, atlases[propIdx]);
}
data.ResultMaterial.SetTextureOffset(data.texPropertyNames[propIdx].name, Vector2.zero);
data.ResultMaterial.SetTextureScale(data.texPropertyNames[propIdx].name, Vector2.one);
combiner._destroyTemporaryTextures(data.texPropertyNames[propIdx].name);
}
}
/// <summary>
/// 第一步：
/// 写入 TexturePipelineData 的 MaterialPropTexturesSet 列表，和 usedObjsToMesh 列表
/// 每个TexSet在 Atlas 中都是一个矩形。
/// 如果 allowedMaterialsFilter （过滤器）为空，则将收集 allObjsToMesh 上的所有材质，usedObjsToMesh 将与allObjsToMesh相同
/// 否则，将仅包括 allowedMaterialsFilter 中的材质，usedObjsToMesh将是使用这些材料的objs。
/// </summary>
internal static void Step1_CollectDistinctMatTexturesAndUsedObjects(TextureCombinePipelineData data,
EditorMethodsInterface textureEditorMethods,
List <GameObject> usedObjsToMesh)
{
// 收集UsedObjects上不同的材质纹理
bool outOfBoundsUVs = false;
Dictionary <int, MeshAnalysisResult[]> meshAnalysisResultsCache = new Dictionary <int, MeshAnalysisResult[]>(); //cache results
for (int i = 0; i < data.allObjsToMesh.Count; i++)
{
GameObject obj = data.allObjsToMesh[i];
if (obj == null)
{
Debug.LogError("合并游戏物体列表中包含空物体");
return;
}
Mesh sharedMesh = MeshBakerUtility.GetMesh(obj);
if (sharedMesh == null)
{
Debug.LogError("游戏物体 " + obj.name + " 网格为空");
return;
}
Material[] sharedMaterials = MeshBakerUtility.GetGOMaterials(obj);
if (sharedMaterials.Length == 0)
{
Debug.LogError("游戏物体 " + obj.name + " 材质为空.");
return;
}
//analyze mesh or grab cached result of previous analysis, stores one result for each submesh
//处理网格数据
MeshAnalysisResult[] meshAnalysisResults; //每个游戏物体的主网格子网格数据数组
if (!meshAnalysisResultsCache.TryGetValue(sharedMesh.GetInstanceID(), out meshAnalysisResults))
{ //获取参与合并物体的网格分析数据
meshAnalysisResults = new MeshAnalysisResult[sharedMesh.subMeshCount];
for (int j = 0; j < sharedMesh.subMeshCount; j++)
{
MeshBakerUtility.hasOutOfBoundsUVs(sharedMesh, ref meshAnalysisResults[j], j);
if (data.normalizeTexelDensity)
{
meshAnalysisResults[j].submeshArea = GetSubmeshArea(sharedMesh, j);
}
if (data.fixOutOfBoundsUVs && !meshAnalysisResults[j].hasUVs)
{
meshAnalysisResults[j].uvRect = new Rect(0, 0, 1, 1);
Debug.LogWarning("Mesh for object " + obj + " has no UV channel but 'consider UVs' is enabled." +
" Assuming UVs will be generated filling 0,0,1,1 rectangle.");
}
}
meshAnalysisResultsCache.Add(sharedMesh.GetInstanceID(), meshAnalysisResults);
}
//处理材质数据
for (int matIdx = 0; matIdx < sharedMaterials.Length; matIdx++)
{
Material mat = sharedMaterials[matIdx];
// 材质过滤器
if (data.allowedMaterialsFilter != null &&
!data.allowedMaterialsFilter.Contains(mat))
{
continue;
}
outOfBoundsUVs = outOfBoundsUVs || meshAnalysisResults[matIdx].hasOutOfBoundsUVs;
if (mat.name.Contains("(Instance)"))
{
Debug.LogError("The sharedMaterial on object " + obj.name + " has been 'Instanced'." +
" This was probably caused by a script accessing the meshRender.material property in the editor. " +
" The material to UV Rectangle mapping will be incorrect. " +
"To fix this recreate the object from its prefab or re-assign its material from the correct asset.");
return;
}
if (data.fixOutOfBoundsUVs)
{
if (!MeshBakerUtility.AreAllSharedMaterialsDistinct(sharedMaterials))
{
Debug.LogWarning("游戏物体 " + obj.name + " 使用相同的材质在多个子网格. " +
"可能生成奇怪的 resultAtlasesAndRects，尤其是与 _fixOutOfBoundsUVs 为 true 时");
}
}
//材质属性 Texutre 信息
MaterialPropTexture[] mts = new MaterialPropTexture[data.texPropertyNames.Count];
for (int propIdx = 0; propIdx < data.texPropertyNames.Count; propIdx++)
{
Texture tx = null;
Vector2 scale = Vector2.one;
Vector2 offset = Vector2.zero;
float texelDensity = 0f;
if (mat.HasProperty(data.texPropertyNames[propIdx].name))
{
Texture txx = GetTextureConsideringStandardShaderKeywords(data.ResultMaterial.shader.name, mat, data.texPropertyNames[propIdx].name);
if (txx != null)
{
if (txx is Texture2D)
{
//TextureFormat 验证
tx = txx;
TextureFormat f = ((Texture2D)tx).format;
bool isNormalMap = false;
if (!Application.isPlaying && textureEditorMethods != null)
{
isNormalMap = textureEditorMethods.IsNormalMap((Texture2D)tx);
}
if ((f == TextureFormat.ARGB32 ||
f == TextureFormat.RGBA32 ||
f == TextureFormat.BGRA32 ||
f == TextureFormat.RGB24 ||
f == TextureFormat.Alpha8) && !isNormalMap) //DXT5 does not work
{
//可使用
}
else
{
//TRIED to copy texture using tex2.SetPixels(tex1.GetPixels()) but bug in 3.5 means DTX1 and 5 compressed textures come out skewe
//尝试使用tex2.SetPixels（tex1.GetPixels（））复制纹理，但是3.5中的bug意味着DTX1和5压缩纹理出现扭曲
if (Application.isPlaying && data.packingAlgorithm != PackingAlgorithmEnum.MeshBakerTexturePacker_Fast)
{
Debug.LogWarning("合并列表中，游戏物体 " + obj.name + " 所使用的 Texture " +
tx.name + " 使用的格式 " + f +
"不是: ARGB32, RGBA32, BGRA32, RGB24, Alpha8 或 DXT. " +
"无法在运行时重新设置尺寸" +
"If format says 'compressed' try changing it to 'truecolor'");
return;
}
else
{
tx = (Texture2D)mat.GetTexture(data.texPropertyNames[propIdx].name);
}
}
}
else
{
Debug.LogError("合并列表中，游戏物体 " + obj.name + " 渲染网格使用的 Texture 不是 Texture2D. ");
return;
}
}
//像素密度
if (tx != null && data.normalizeTexelDensity)
{
//不考虑平铺和UV采样超出范围
if (meshAnalysisResults[propIdx].submeshArea == 0)
{
texelDensity = 0f;
}
else
{
texelDensity = (tx.width * tx.height) / (meshAnalysisResults[propIdx].submeshArea);
}
}
//规格，偏移
GetMaterialScaleAndOffset(mat, data.texPropertyNames[propIdx].name, out offset, out scale);
}
mts[propIdx] = new MaterialPropTexture(tx, offset, scale, texelDensity);
}
// 收集材质参数值的平均值
data.nonTexturePropertyBlender.CollectAverageValuesOfNonTextureProperties(data.ResultMaterial, mat);
Vector2 obUVscale = new Vector2(meshAnalysisResults[matIdx].uvRect.width, meshAnalysisResults[matIdx].uvRect.height);
Vector2 obUVoffset = new Vector2(meshAnalysisResults[matIdx].uvRect.x, meshAnalysisResults[matIdx].uvRect.y);
//Add to distinct set of textures if not already there
TextureTilingTreatment tilingTreatment = TextureTilingTreatment.none;
if (data.fixOutOfBoundsUVs)
{
tilingTreatment = TextureTilingTreatment.considerUVs;
}
//合并信息 distinctMaterialTextures 数据设置
//材质各参数 Texture，及 UV 偏移数据映射
MaterialPropTexturesSet setOfTexs = new MaterialPropTexturesSet(mts, obUVoffset, obUVscale, tilingTreatment); //one of these per submesh
//材质及各变化参数Rect 数据
MatAndTransformToMerged matt = new MatAndTransformToMerged(new DRect(obUVoffset, obUVscale), data.fixOutOfBoundsUVs, mat);
setOfTexs.matsAndGOs.mats.Add(matt);
MaterialPropTexturesSet setOfTexs2 = data.distinctMaterialTextures.Find(x => x.IsEqual(setOfTexs, data.fixOutOfBoundsUVs, data.nonTexturePropertyBlender));
if (setOfTexs2 != null)
{
setOfTexs = setOfTexs2;
}
else
{
data.distinctMaterialTextures.Add(setOfTexs);
}
if (!setOfTexs.matsAndGOs.mats.Contains(matt))
{
setOfTexs.matsAndGOs.mats.Add(matt);
}
if (!setOfTexs.matsAndGOs.gos.Contains(obj))
{
setOfTexs.matsAndGOs.gos.Add(obj);
//已使用 游戏物体
if (!usedObjsToMesh.Contains(obj))
{
usedObjsToMesh.Add(obj);
}
}
}
}
Debug.Log(string.Format("第一阶段完成;" +
"参与合并的游戏物体的不同材质，各自包含与shader属性对应的不同的纹理，收集到 {0} 组 textures，即 {0} 个不同的材质，" +
"fixOutOfBoundsUV:{1} " +
"considerNonTextureProperties:{2}",
data.distinctMaterialTextures.Count, data.fixOutOfBoundsUVs, data.considerNonTextureProperties));
if (data.distinctMaterialTextures.Count == 0)
{
Debug.LogError("None of the source object materials matched any of the allowed materials for submesh with result material: " + data.ResultMaterial);
return;
}
TextureCombinerMerging merger = new TextureCombinerMerging(data.considerNonTextureProperties,
data.nonTexturePropertyBlender, data.fixOutOfBoundsUVs);
merger.MergeOverlappingDistinctMaterialTexturesAndCalcMaterialSubrects(data.distinctMaterialTextures);
}