// Convert material from Unity to glTF PBR
private void unityToPBRMaterial(Material mat, ref GlTF_Material material)
{
bool isMaterialPBR = true;
bool isMetal = true;
bool hasPBRMap = false;
if (!mat.shader.name.Contains("Standard"))
{
Debug.Log("Material " + mat.shader + " is not fully supported");
isMaterialPBR = false;
}
else
{
// Is metal workflow used
isMetal = mat.shader.name == "Standard";
GlTF_Writer.hasSpecularMaterials = GlTF_Writer.hasSpecularMaterials || !isMetal;
material.isMetal = isMetal;
// Is smoothness defined by diffuse texture or PBR texture' alpha?
if (mat.GetFloat("_SmoothnessTextureChannel") != 0)
{
Debug.Log("Smoothness uses diffuse's alpha channel. Unsupported for now");
}
hasPBRMap = (!isMetal && mat.GetTexture("_SpecGlossMap") != null || isMetal && mat.GetTexture("_MetallicGlossMap") != null);
}
//Check transparency
bool hasTransparency = handleTransparency(ref mat, ref material);
//Parse diffuse channel texture and color
if (mat.HasProperty("_MainTex") && mat.GetTexture("_MainTex") != null)
{
var textureValue = new GlTF_Material.DictValue();
textureValue.name = isMetal ? "baseColorTexture" : "diffuseTexture";
int diffuseTextureIndex = processTexture((Texture2D)mat.GetTexture("_MainTex"), hasTransparency ? IMAGETYPE.RGBA : IMAGETYPE.RGBA_OPAQUE);
textureValue.intValue.Add("index", diffuseTextureIndex);
textureValue.intValue.Add("texCoord", 0);
material.pbrValues.Add(textureValue);
}
if (mat.HasProperty("_Color"))
{
var colorValue = new GlTF_Material.ColorValue();
colorValue.name = isMetal ? "baseColorFactor" : "diffuseFactor";
Color c = mat.GetColor("_Color");
clampColor(ref c);
colorValue.color = c;
material.pbrValues.Add(colorValue);
}
//Parse PBR textures
if (isMaterialPBR)
{
if (isMetal)
{
if (hasPBRMap) // No metallic factor if texture
{
var textureValue = new GlTF_Material.DictValue();
textureValue.name = "metallicRoughnessTexture";
Texture2D metallicRoughnessTexture = (Texture2D)mat.GetTexture("_MetallicGlossMap");
Texture2D occlusion = (Texture2D)mat.GetTexture("_OcclusionMap");
int metalRoughTextureIndex = createOcclusionMetallicRoughnessTexture(ref occlusion, ref metallicRoughnessTexture);
textureValue.intValue.Add("index", metalRoughTextureIndex);
textureValue.intValue.Add("texCoord", 0);
material.pbrValues.Add(textureValue);
}
var metallicFactor = new GlTF_Material.FloatValue();
metallicFactor.name = "metallicFactor";
metallicFactor.value = hasPBRMap ? 1.0f : mat.GetFloat("_Metallic");
material.pbrValues.Add(metallicFactor);
//Roughness factor
var roughnessFactor = new GlTF_Material.FloatValue();
roughnessFactor.name = "roughnessFactor";
roughnessFactor.value = hasPBRMap ? 1.0f : 1 - mat.GetFloat("_Glossiness"); // gloss scale is not supported for now(property _GlossMapScale)
material.pbrValues.Add(roughnessFactor);
}
else
{
if (hasPBRMap) // No metallic factor if texture
{
var textureValue = new GlTF_Material.DictValue();
textureValue.name = "specularGlossinessTexture";
int specGlossTextureIndex = processTexture((Texture2D)mat.GetTexture("_SpecGlossMap"), IMAGETYPE.RGBA);
textureValue.intValue.Add("index", specGlossTextureIndex);
textureValue.intValue.Add("texCoord", 0);
material.pbrValues.Add(textureValue);
}
var specularFactor = new GlTF_Material.ColorValue();
specularFactor.name = "specularFactor";
specularFactor.color = hasPBRMap ? Color.white : mat.GetColor("_SpecColor"); // gloss scale is not supported for now(property _GlossMapScale)
specularFactor.isRGB = true;
material.pbrValues.Add(specularFactor);
var glossinessFactor = new GlTF_Material.FloatValue();
glossinessFactor.name = "glossinessFactor";
glossinessFactor.value = hasPBRMap ? 1.0f : mat.GetFloat("_Glossiness"); // gloss scale is not supported for now(property _GlossMapScale)
material.pbrValues.Add(glossinessFactor);
}
}
//BumpMap
if (mat.HasProperty("_BumpMap") && mat.GetTexture("_BumpMap") != null)
{
Texture2D bumpTexture = mat.GetTexture("_BumpMap") as Texture2D;
// Check if it's a normal or a bump map
TextureImporter im = AssetImporter.GetAtPath(AssetDatabase.GetAssetPath(bumpTexture)) as TextureImporter;
bool isBumpMap = im.convertToNormalmap;
if (isBumpMap)
{
Debug.LogWarning("Unsupported texture " + bumpTexture + " (normal maps generated from grayscale are not supported)");
}
else
{
var textureValue = new GlTF_Material.DictValue();
textureValue.name = "normalTexture";
int bumpTextureIndex = processTexture(bumpTexture, IMAGETYPE.NORMAL_MAP);
textureValue.intValue.Add("index", bumpTextureIndex);
textureValue.intValue.Add("texCoord", 0);
textureValue.floatValue.Add("scale", mat.GetFloat("_BumpScale"));
material.values.Add(textureValue);
}
}
//Emissive
if (mat.HasProperty("_EmissionMap") && mat.GetTexture("_EmissionMap") != null)
{
Texture2D emissiveTexture = mat.GetTexture("_EmissionMap") as Texture2D;
var textureValue = new GlTF_Material.DictValue();
textureValue.name = "emissiveTexture";
int emissiveTextureIndex = processTexture(emissiveTexture, IMAGETYPE.RGB);
textureValue.intValue.Add("index", emissiveTextureIndex);
textureValue.intValue.Add("texCoord", 0);
material.values.Add(textureValue);
}
var emissiveFactor = new GlTF_Material.ColorValue();
emissiveFactor.name = "emissiveFactor";
emissiveFactor.isRGB = true;
emissiveFactor.color = mat.GetColor("_EmissionColor");
material.values.Add(emissiveFactor);
//Occlusion (kept as separated channel for specular workflow, but merged in R channel for metallic workflow)
if (mat.HasProperty("_OcclusionMap") && mat.GetTexture("_OcclusionMap") != null)
{
Texture2D occlusionTexture = mat.GetTexture("_OcclusionMap") as Texture2D;
var textureValue = new GlTF_Material.DictValue();
textureValue.name = "occlusionTexture";
int occlusionTextureIndex = processTexture(occlusionTexture, IMAGETYPE.RGB);
textureValue.intValue.Add("index", occlusionTextureIndex);
textureValue.intValue.Add("texCoord", 0);
textureValue.floatValue.Add("strength", mat.GetFloat("_OcclusionStrength"));
material.values.Add(textureValue);
}
// Unity materials are single sided by default
GlTF_Material.BoolValue doubleSided = new GlTF_Material.BoolValue();
doubleSided.name = "doubleSided";
doubleSided.value = false;
material.values.Add(doubleSided);
}
public static BoundsDouble Export(string path, Transform[] trs, Transform root, out double minHeight, out double maxHeight)
{
minHeight = 0;
maxHeight = 0;
writer = new GlTF_Writer();
writer.Init();
if (presetAsset != null)
{
string psPath = AssetDatabase.GetAssetPath(presetAsset);
if (psPath != null)
{
psPath = psPath.Remove(0, "Assets".Length);
psPath = Application.dataPath + psPath;
preset.Load(psPath);
}
}
savedPath = Path.GetDirectoryName(path);
savedFile = Path.GetFileNameWithoutExtension(path);
EditorPrefs.SetString(KEY_PATH, savedPath);
EditorPrefs.SetString(KEY_FILE, savedFile);
Debug.Log("attempting to save to " + path);
writer.OpenFiles(path);
if (rtcScript != null && root != null)
{
var instance = Activator.CreateInstance(rtcScript.GetClass());
var rtc = instance as RTCCallback;
if (rtc != null)
{
writer.RTCCenter = rtc.GetCenter(root);
}
}
RotationCallback rotCallback = null;;
if (rotScript != null)
{
var instance = Activator.CreateInstance(rotScript.GetClass());
rotCallback = instance as RotationCallback;
}
if (unpackTexture)
{
// prepass, for texture unpacker
TextureUnpacker.Reset();
foreach (Transform tr in trs)
{
TextureUnpacker.CheckPackedTexture(tr, preset);
}
TextureUnpacker.Build();
}
BoundsDouble bb = new BoundsDouble();
// first, collect objects in the scene, add to lists
foreach (Transform tr in trs)
{
if (tr.GetComponent <Camera>() != null)
{
if (tr.GetComponent <Camera>().orthographic)
{
GlTF_Orthographic cam;
cam = new GlTF_Orthographic();
cam.type = "orthographic";
cam.zfar = tr.GetComponent <Camera>().farClipPlane;
cam.znear = tr.GetComponent <Camera>().nearClipPlane;
cam.name = tr.name;
//cam.orthographic.xmag = tr.camera.
GlTF_Writer.cameras.Add(cam);
}
else
{
GlTF_Perspective cam;
cam = new GlTF_Perspective();
cam.type = "perspective";
cam.zfar = tr.GetComponent <Camera>().farClipPlane;
cam.znear = tr.GetComponent <Camera>().nearClipPlane;
cam.aspect_ratio = tr.GetComponent <Camera>().aspect;
cam.yfov = tr.GetComponent <Camera>().fieldOfView;
cam.name = tr.name;
GlTF_Writer.cameras.Add(cam);
}
}
if (tr.GetComponent <Light>() != null)
{
switch (tr.GetComponent <Light>().type)
{
case LightType.Point:
GlTF_PointLight pl = new GlTF_PointLight();
pl.color = new GlTF_ColorRGB(tr.GetComponent <Light>().color);
pl.name = tr.name;
GlTF_Writer.lights.Add(pl);
break;
case LightType.Spot:
GlTF_SpotLight sl = new GlTF_SpotLight();
sl.color = new GlTF_ColorRGB(tr.GetComponent <Light>().color);
sl.name = tr.name;
GlTF_Writer.lights.Add(sl);
break;
case LightType.Directional:
GlTF_DirectionalLight dl = new GlTF_DirectionalLight();
dl.color = new GlTF_ColorRGB(tr.GetComponent <Light>().color);
dl.name = tr.name;
GlTF_Writer.lights.Add(dl);
break;
case LightType.Area:
GlTF_AmbientLight al = new GlTF_AmbientLight();
al.color = new GlTF_ColorRGB(tr.GetComponent <Light>().color);
al.name = tr.name;
GlTF_Writer.lights.Add(al);
break;
}
}
Mesh m = GetMesh(tr);
if (m != null)
{
GlTF_Mesh mesh = new GlTF_Mesh();
mesh.name = GlTF_Mesh.GetNameFromObject(m);
GlTF_Accessor positionAccessor = new GlTF_Accessor(GlTF_Accessor.GetNameFromObject(m, "position"), GlTF_Accessor.Type.VEC3, GlTF_Accessor.ComponentType.FLOAT);
positionAccessor.bufferView = GlTF_Writer.vec3BufferView;
GlTF_Writer.accessors.Add(positionAccessor);
GlTF_Accessor normalAccessor = null;
if (m.normals.Length > 0)
{
normalAccessor = new GlTF_Accessor(GlTF_Accessor.GetNameFromObject(m, "normal"), GlTF_Accessor.Type.VEC3, GlTF_Accessor.ComponentType.FLOAT);
normalAccessor.bufferView = GlTF_Writer.vec3BufferView;
GlTF_Writer.accessors.Add(normalAccessor);
}
GlTF_Accessor uv0Accessor = null;
if (m.uv.Length > 0)
{
uv0Accessor = new GlTF_Accessor(GlTF_Accessor.GetNameFromObject(m, "uv0"), GlTF_Accessor.Type.VEC2, GlTF_Accessor.ComponentType.FLOAT);
uv0Accessor.bufferView = GlTF_Writer.vec2BufferView;
GlTF_Writer.accessors.Add(uv0Accessor);
}
GlTF_Accessor uv1Accessor = null;
if (m.uv2.Length > 0)
{
uv1Accessor = new GlTF_Accessor(GlTF_Accessor.GetNameFromObject(m, "uv1"), GlTF_Accessor.Type.VEC2, GlTF_Accessor.ComponentType.FLOAT);
uv1Accessor.bufferView = GlTF_Writer.vec2BufferView;
GlTF_Writer.accessors.Add(uv1Accessor);
}
GlTF_Accessor uv2Accessor = null;
if (m.uv3.Length > 0)
{
uv2Accessor = new GlTF_Accessor(GlTF_Accessor.GetNameFromObject(m, "uv2"), GlTF_Accessor.Type.VEC2, GlTF_Accessor.ComponentType.FLOAT);
uv2Accessor.bufferView = GlTF_Writer.vec2BufferView;
GlTF_Writer.accessors.Add(uv2Accessor);
}
GlTF_Accessor uv3Accessor = null;
if (m.uv4.Length > 0)
{
uv3Accessor = new GlTF_Accessor(GlTF_Accessor.GetNameFromObject(m, "uv3"), GlTF_Accessor.Type.VEC2, GlTF_Accessor.ComponentType.FLOAT);
uv3Accessor.bufferView = GlTF_Writer.vec2BufferView;
GlTF_Writer.accessors.Add(uv3Accessor);
}
var smCount = m.subMeshCount;
for (var i = 0; i < smCount; ++i)
{
GlTF_Primitive primitive = new GlTF_Primitive();
primitive.name = GlTF_Primitive.GetNameFromObject(m, i);
primitive.index = i;
GlTF_Attributes attributes = new GlTF_Attributes();
attributes.positionAccessor = positionAccessor;
attributes.normalAccessor = normalAccessor;
attributes.texCoord0Accessor = uv0Accessor;
attributes.texCoord1Accessor = uv1Accessor;
attributes.texCoord2Accessor = uv2Accessor;
attributes.texCoord3Accessor = uv3Accessor;
primitive.attributes = attributes;
GlTF_Accessor indexAccessor = new GlTF_Accessor(GlTF_Accessor.GetNameFromObject(m, "indices_" + i), GlTF_Accessor.Type.SCALAR, GlTF_Accessor.ComponentType.USHORT);
indexAccessor.bufferView = GlTF_Writer.ushortBufferView;
GlTF_Writer.accessors.Add(indexAccessor);
primitive.indices = indexAccessor;
var mr = GetRenderer(tr);
var sm = mr.sharedMaterials;
if (i < sm.Length && sm[i] != null)
{
var mat = sm[i];
var matName = GlTF_Material.GetNameFromObject(mat);
primitive.materialName = matName;
if (!GlTF_Writer.materials.ContainsKey(matName))
{
GlTF_Material material = new GlTF_Material();
material.name = matName;
GlTF_Writer.materials.Add(material.name, material);
//technique
var s = mat.shader;
var techName = GlTF_Technique.GetNameFromObject(s);
material.instanceTechniqueName = techName;
if (!GlTF_Writer.techniques.ContainsKey(techName))
{
GlTF_Technique tech = new GlTF_Technique();
tech.name = techName;
GlTF_Technique.States ts = null;
if (preset.techniqueStates.ContainsKey(s.name))
{
ts = preset.techniqueStates[s.name];
}
else if (preset.techniqueStates.ContainsKey("*"))
{
ts = preset.techniqueStates["*"];
}
if (ts == null)
{
// Unless otherwise specified by a preset file, enable z-buffering.
ts = new GlTF_Technique.States();
const int DEPTH_TEST = 2929;
// int CULL_FACE = 2884;
ts.enable = new int[1] {
DEPTH_TEST
};
}
tech.states = ts;
GlTF_Technique.Parameter tParam = new GlTF_Technique.Parameter();
tParam.name = "position";
tParam.type = GlTF_Technique.Type.FLOAT_VEC3;
tParam.semantic = GlTF_Technique.Semantic.POSITION;
tech.parameters.Add(tParam);
GlTF_Technique.Attribute tAttr = new GlTF_Technique.Attribute();
tAttr.name = "a_position";
tAttr.param = tParam.name;
tech.attributes.Add(tAttr);
if (normalAccessor != null)
{
tParam = new GlTF_Technique.Parameter();
tParam.name = "normal";
tParam.type = GlTF_Technique.Type.FLOAT_VEC3;
tParam.semantic = GlTF_Technique.Semantic.NORMAL;
tech.parameters.Add(tParam);
tAttr = new GlTF_Technique.Attribute();
tAttr.name = "a_normal";
tAttr.param = tParam.name;
tech.attributes.Add(tAttr);
}
if (uv0Accessor != null)
{
tParam = new GlTF_Technique.Parameter();
tParam.name = "texcoord0";
tParam.type = GlTF_Technique.Type.FLOAT_VEC2;
tParam.semantic = GlTF_Technique.Semantic.TEXCOORD_0;
tech.parameters.Add(tParam);
tAttr = new GlTF_Technique.Attribute();
tAttr.name = "a_texcoord0";
tAttr.param = tParam.name;
tech.attributes.Add(tAttr);
}
if (uv1Accessor != null)
{
tParam = new GlTF_Technique.Parameter();
tParam.name = "texcoord1";
tParam.type = GlTF_Technique.Type.FLOAT_VEC2;
tParam.semantic = GlTF_Technique.Semantic.TEXCOORD_1;
tech.parameters.Add(tParam);
tAttr = new GlTF_Technique.Attribute();
tAttr.name = "a_texcoord1";
tAttr.param = tParam.name;
tech.attributes.Add(tAttr);
}
if (uv2Accessor != null)
{
tParam = new GlTF_Technique.Parameter();
tParam.name = "texcoord2";
tParam.type = GlTF_Technique.Type.FLOAT_VEC2;
tParam.semantic = GlTF_Technique.Semantic.TEXCOORD_2;
tech.parameters.Add(tParam);
tAttr = new GlTF_Technique.Attribute();
tAttr.name = "a_texcoord2";
tAttr.param = tParam.name;
tech.attributes.Add(tAttr);
}
if (uv3Accessor != null)
{
tParam = new GlTF_Technique.Parameter();
tParam.name = "texcoord3";
tParam.type = GlTF_Technique.Type.FLOAT_VEC2;
tParam.semantic = GlTF_Technique.Semantic.TEXCOORD_3;
tech.parameters.Add(tParam);
tAttr = new GlTF_Technique.Attribute();
tAttr.name = "a_texcoord3";
tAttr.param = tParam.name;
tech.attributes.Add(tAttr);
}
tech.AddDefaultUniforms(writer.RTCCenter != null);
GlTF_Writer.techniques.Add(techName, tech);
int spCount = ShaderUtil.GetPropertyCount(s);
for (var j = 0; j < spCount; ++j)
{
var pName = ShaderUtil.GetPropertyName(s, j);
var pType = ShaderUtil.GetPropertyType(s, j);
// Debug.Log(pName + " " + pType);
GlTF_Technique.Uniform tUni;
if (pType == ShaderUtil.ShaderPropertyType.Color)
{
tParam = new GlTF_Technique.Parameter();
tParam.name = pName;
tParam.type = GlTF_Technique.Type.FLOAT_VEC4;
tech.parameters.Add(tParam);
tUni = new GlTF_Technique.Uniform();
tUni.name = pName;
tUni.param = tParam.name;
tech.uniforms.Add(tUni);
}
else if (pType == ShaderUtil.ShaderPropertyType.Vector)
{
tParam = new GlTF_Technique.Parameter();
tParam.name = pName;
tParam.type = GlTF_Technique.Type.FLOAT_VEC4;
tech.parameters.Add(tParam);
tUni = new GlTF_Technique.Uniform();
tUni.name = pName;
tUni.param = tParam.name;
tech.uniforms.Add(tUni);
}
else if (pType == ShaderUtil.ShaderPropertyType.Float ||
pType == ShaderUtil.ShaderPropertyType.Range)
{
tParam = new GlTF_Technique.Parameter();
tParam.name = pName;
tParam.type = GlTF_Technique.Type.FLOAT;
tech.parameters.Add(tParam);
tUni = new GlTF_Technique.Uniform();
tUni.name = pName;
tUni.param = tParam.name;
tech.uniforms.Add(tUni);
}
else if (pType == ShaderUtil.ShaderPropertyType.TexEnv)
{
var td = ShaderUtil.GetTexDim(s, j);
if (td == UnityEngine.Rendering.TextureDimension.Tex2D)
{
tParam = new GlTF_Technique.Parameter();
tParam.name = pName;
tParam.type = GlTF_Technique.Type.SAMPLER_2D;
tech.parameters.Add(tParam);
tUni = new GlTF_Technique.Uniform();
tUni.name = pName;
tUni.param = tParam.name;
tech.uniforms.Add(tUni);
}
}
}
// create program
GlTF_Program program = new GlTF_Program();
program.name = GlTF_Program.GetNameFromObject(s);
tech.program = program.name;
foreach (var attr in tech.attributes)
{
program.attributes.Add(attr.name);
}
GlTF_Writer.programs.Add(program);
// shader
GlTF_Shader vs = new GlTF_Shader();
vs.name = GlTF_Shader.GetNameFromObject(s, GlTF_Shader.Type.Vertex);
program.vertexShader = vs.name;
vs.type = GlTF_Shader.Type.Vertex;
vs.uri = preset.GetVertexShader(s.name);
GlTF_Writer.shaders.Add(vs);
GlTF_Shader fs = new GlTF_Shader();
fs.name = GlTF_Shader.GetNameFromObject(s, GlTF_Shader.Type.Fragment);
program.fragmentShader = fs.name;
fs.type = GlTF_Shader.Type.Fragment;
fs.uri = preset.GetFragmentShader(s.name);
GlTF_Writer.shaders.Add(fs);
}
int spCount2 = ShaderUtil.GetPropertyCount(s);
for (var j = 0; j < spCount2; ++j)
{
var pName = ShaderUtil.GetPropertyName(s, j);
var pType = ShaderUtil.GetPropertyType(s, j);
if (pType == ShaderUtil.ShaderPropertyType.Color)
{
var matCol = new GlTF_Material.ColorValue();
matCol.name = pName;
matCol.color = mat.GetColor(pName);
material.values.Add(matCol);
}
else if (pType == ShaderUtil.ShaderPropertyType.Vector)
{
var matVec = new GlTF_Material.VectorValue();
matVec.name = pName;
matVec.vector = mat.GetVector(pName);
material.values.Add(matVec);
}
else if (pType == ShaderUtil.ShaderPropertyType.Float ||
pType == ShaderUtil.ShaderPropertyType.Range)
{
var matFloat = new GlTF_Material.FloatValue();
matFloat.name = pName;
matFloat.value = mat.GetFloat(pName);
material.values.Add(matFloat);
}
else if (pType == ShaderUtil.ShaderPropertyType.TexEnv)
{
var td = ShaderUtil.GetTexDim(s, j);
if (td == UnityEngine.Rendering.TextureDimension.Tex2D)
{
var t = mat.GetTexture(pName);
if (t == null)
{
continue;
}
var val = new GlTF_Material.StringValue();
val.name = pName;
string texName = null;
texName = GlTF_Texture.GetNameFromObject(t);
val.value = texName;
material.values.Add(val);
if (!GlTF_Writer.textures.ContainsKey(texName))
{
var texPath = ExportTexture(t, savedPath);
GlTF_Image img = new GlTF_Image();
img.name = GlTF_Image.GetNameFromObject(t);
img.uri = texPath;
GlTF_Writer.images.Add(img);
GlTF_Sampler sampler;
var samplerName = GlTF_Sampler.GetNameFromObject(t);
if (GlTF_Writer.samplers.ContainsKey(samplerName))
{
sampler = GlTF_Writer.samplers[samplerName];
}
else
{
sampler = new GlTF_Sampler(t);
sampler.name = samplerName;
GlTF_Writer.samplers[samplerName] = sampler;
}
GlTF_Texture texture = new GlTF_Texture();
texture.name = texName;
texture.source = img.name;
texture.samplerName = samplerName;
GlTF_Writer.textures.Add(texName, texture);
}
}
}
}
}
}
mesh.primitives.Add(primitive);
}
mesh.Populate(m);
GlTF_Writer.meshes.Add(mesh);
if (unpackTexture)
{
TextureUnpacker.ProcessMesh(mesh);
}
// calculate bounding box transform
if (root != null)
{
Matrix4x4 brot = Matrix4x4.identity;
if (rotCallback != null)
{
brot = rotCallback.GetBoundsRotationMatrix(root);
}
var pos = tr.position - root.position; // relative to parent
var objMat = Matrix4x4.TRS(pos, tr.rotation, tr.lossyScale);
//read vertices
var ms = positionAccessor.bufferView.memoryStream;
var offset = (int)positionAccessor.byteOffset;
var len = positionAccessor.count;
var buffer = new byte[len * 12];
var mspos = ms.Position;
ms.Position = offset;
ms.Read(buffer, 0, buffer.Length);
minHeight = double.MaxValue;
maxHeight = double.MinValue;
double[] c = writer.RTCCenter;
double[] minPos = new double[3];
minPos[0] = double.MaxValue;
minPos[1] = double.MaxValue;
minPos[2] = double.MaxValue;
double[] maxPos = new double[3];
maxPos[0] = double.MinValue;
maxPos[1] = double.MinValue;
maxPos[2] = double.MinValue;
for (int j = 0; j < len; ++j)
{
var x = System.BitConverter.ToSingle(buffer, j * 12);
var y = System.BitConverter.ToSingle(buffer, j * 12 + 4);
var z = System.BitConverter.ToSingle(buffer, j * 12 + 8);
// local rotation
var lx = objMat.m00 * x + objMat.m01 * y + objMat.m02 * z;
var ly = objMat.m10 * x + objMat.m11 * y + objMat.m12 * z;
var lz = objMat.m20 * x + objMat.m21 * y + objMat.m22 * z;
minHeight = Math.Min(minHeight, ly);
maxHeight = Math.Max(maxHeight, ly);
// to world
double wx = brot.m00 * lx + brot.m01 * ly + brot.m02 * lz;
double wy = brot.m10 * lx + brot.m11 * ly + brot.m12 * lz;
double wz = brot.m20 * lx + brot.m21 * ly + brot.m22 * lz;
// local translation to world
double tx = brot.m00 * pos.x + brot.m01 * pos.y + brot.m02 * pos.z;
double ty = brot.m10 * pos.x + brot.m11 * pos.y + brot.m12 * pos.z;
double tz = brot.m20 * pos.x + brot.m21 * pos.y + brot.m22 * pos.z;
wx += tx;
wy += ty;
wz += tz;
if (c != null)
{
wx += c[0];
wy += c[1];
wz += c[2];
}
minPos[0] = Math.Min(minPos[0], wx);
minPos[1] = Math.Min(minPos[1], wy);
minPos[2] = Math.Min(minPos[2], wz);
maxPos[0] = Math.Max(maxPos[0], wx);
maxPos[1] = Math.Max(maxPos[1], wy);
maxPos[2] = Math.Max(maxPos[2], wz);
}
ms.Position = mspos;
BoundsDouble tbb = new BoundsDouble();
tbb.Encapsulate(new BoundsDouble(minPos, maxPos));
bb.Encapsulate(tbb);
}
}
Animation a = tr.GetComponent <Animation>();
// Animator a = tr.GetComponent<Animator>();
if (a != null)
{
AnimationClip[] clips = AnimationUtility.GetAnimationClips(tr.gameObject);
int nClips = clips.Length;
// int nClips = a.GetClipCount();
for (int i = 0; i < nClips; i++)
{
GlTF_Animation anim = new GlTF_Animation(a.name);
anim.Populate(clips[i]);
GlTF_Writer.animations.Add(anim);
}
}
// next, build hierarchy of nodes
GlTF_Node node = new GlTF_Node();
Matrix4x4 rotMat = Matrix4x4.identity;
if (root != null && rotCallback != null)
{
rotMat = rotCallback.GetNodeRotationMatrix(root);
}
if (tr == root)
{
Matrix4x4 mat = Matrix4x4.identity;
mat.m22 = -1; // flip z axis
if (rotMat != Matrix4x4.identity)
{
mat = rotMat;
}
// do not use global position if rtc is defined
Vector3 pos = Vector3.zero;
if (writer.RTCCenter == null)
{
pos = tr.localPosition;
}
mat = mat * Matrix4x4.TRS(pos, tr.localRotation, tr.localScale);
node.matrix = new GlTF_Matrix(mat);
}
else
{
node.hasParent = true;
if (tr.localPosition != Vector3.zero)
{
node.translation = new GlTF_Translation(tr.localPosition);
}
if (tr.localScale != Vector3.one)
{
node.scale = new GlTF_Scale(tr.localScale);
}
if (tr.localRotation != Quaternion.identity)
{
node.rotation = new GlTF_Rotation(tr.localRotation);
}
}
node.name = GlTF_Node.GetNameFromObject(tr);
if (tr.GetComponent <Camera>() != null)
{
node.cameraName = tr.name;
}
else if (tr.GetComponent <Light>() != null)
{
node.lightName = tr.name;
}
else if (m != null)
{
node.meshNames.Add(GlTF_Mesh.GetNameFromObject(m));
}
foreach (Transform t in tr.transform)
{
var found = false;
foreach (var check in trs)
{
if (t == check)
{
found = true;
break;
}
}
if (found)
{
node.childrenNames.Add(GlTF_Node.GetNameFromObject(t));
}
}
GlTF_Writer.nodes.Add(node);
}
if (copyShaders && preset.shaderDir != null)
{
var sd = Path.Combine(Application.dataPath, preset.shaderDir);
foreach (var shader in GlTF_Writer.shaders)
{
var srcPath = Path.Combine(sd, shader.uri);
if (File.Exists(srcPath))
{
var dstPath = Path.Combine(savedPath, shader.uri);
File.Copy(srcPath, dstPath, true);
}
}
}
// third, add meshes etc to byte stream, keeping track of buffer offsets
writer.Write();
writer.CloseFiles();
return(bb);
}
