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SceneToGlTFWiz.cs
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SceneToGlTFWiz.cs
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/***************************************************************************
GlamExport
- Unity3D Scriptable Wizard to export Hierarchy or Project objects as glTF
****************************************************************************/
#if UNITY_EDITOR
using UnityEngine;
using UnityEditor;
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Text;
using System.Reflection;
using Ionic.Zip;
public enum IMAGETYPE
{
GRAYSCALE,
RGB,
RGBA,
RGBA_OPAQUE,
R,
G,
B,
A,
G_INVERT,
NORMAL_MAP,
IGNORE
}
public class SceneToGlTFWiz : MonoBehaviour
{
public int jpgQuality = 85;
public GlTF_Writer writer;
string savedPath = "";
int nbSelectedObjects = 0;
static bool done = true;
public static void parseUnityCamera(Transform tr)
{
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 = GlTF_Writer.cleanNonAlphanumeric(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 = GlTF_Writer.cleanNonAlphanumeric(tr.name);
GlTF_Writer.cameras.Add(cam);
}
}
public bool isDone()
{
return done;
}
public void resetParser()
{
done = false;
}
public static void parseUnityLight(Transform tr)
{
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 = GlTF_Writer.cleanNonAlphanumeric(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 = GlTF_Writer.cleanNonAlphanumeric(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 = GlTF_Writer.cleanNonAlphanumeric(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 = GlTF_Writer.cleanNonAlphanumeric(tr.name);
GlTF_Writer.lights.Add(al);
break;
}
}
public void ExportCoroutine(string path, Preset presetAsset, bool buildZip, bool exportPBRMaterials, bool exportAnimation = true, bool doConvertImages = true)
{
StartCoroutine(Export(path, presetAsset, buildZip, exportPBRMaterials, exportAnimation, doConvertImages));
}
public int getNbSelectedObjects()
{
return nbSelectedObjects;
}
public IEnumerator Export(string path, Preset presetAsset, bool buildZip, bool exportPBRMaterials, bool exportAnimation = true, bool doConvertImages = false)
{
writer = new GlTF_Writer();
writer.Init ();
done = false;
bool debugRightHandedScale = false;
GlTF_Writer.exportedFiles.Clear();
if (debugRightHandedScale)
GlTF_Writer.convertRightHanded = false;
writer.extraString.Add("exporterVersion", GlTF_Writer.exporterVersion );
// Create rootNode
GlTF_Node correctionNode = new GlTF_Node();
correctionNode.id = "UnityGlTF_root";
correctionNode.name = "UnityGlTF_root";
GlTF_Writer.nodes.Add(correctionNode);
GlTF_Writer.nodeNames.Add(correctionNode.name);
GlTF_Writer.rootNodes.Add(correctionNode);
//path = toGlTFname(path);
savedPath = Path.GetDirectoryName(path);
// Temp list to keep track of skeletons
Dictionary<string, GlTF_Skin> parsedSkins = new Dictionary<string, GlTF_Skin>();
parsedSkins.Clear();
// first, collect objects in the scene, add to lists
Transform[] transforms = Selection.GetTransforms (SelectionMode.Deep);
List<Transform> trs = new List<Transform>(transforms);
// Prefilter selected nodes and look for skinning in order to list "bones" nodes
//FIXME: improve this
List<Transform> bones = new List<Transform>();
foreach(Transform tr in trs)
{
if (!tr.gameObject.activeSelf)
continue;
SkinnedMeshRenderer skin = tr.GetComponent<SkinnedMeshRenderer>();
if (skin)
{
foreach(Transform bone in skin.bones)
{
bones.Add(bone);
}
}
}
nbSelectedObjects = trs.Count;
int nbDisabledObjects = 0;
foreach (Transform tr in trs)
{
if (tr.gameObject.activeInHierarchy == false)
{
nbDisabledObjects++;
continue;
}
// Initialize the node
GlTF_Node node = new GlTF_Node();
node.id = GlTF_Node.GetNameFromObject(tr);
node.name = GlTF_Writer.cleanNonAlphanumeric(tr.name);
if (tr.GetComponent<Camera>() != null)
parseUnityCamera(tr);
if (tr.GetComponent<Light>() != null)
parseUnityLight(tr);
Mesh m = GetMesh(tr);
if (m != null)
{
GlTF_Mesh mesh = new GlTF_Mesh();
mesh.name = GlTF_Writer.cleanNonAlphanumeric(GlTF_Mesh.GetNameFromObject(m) + tr.name);
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 colorAccessor = null;
if (m.colors.Length > 0)
{
colorAccessor = new GlTF_Accessor(GlTF_Accessor.GetNameFromObject(m, "color"), GlTF_Accessor.Type.VEC4, GlTF_Accessor.ComponentType.FLOAT);
colorAccessor.bufferView = GlTF_Writer.vec4BufferView;
GlTF_Writer.accessors.Add(colorAccessor);
}
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) {
// check if object is affected by a lightmap
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);
}
GlTF_Accessor jointAccessor = null;
if (exportAnimation && m.boneWeights.Length > 0)
{
jointAccessor = new GlTF_Accessor(GlTF_Accessor.GetNameFromObject(m, "joints"), GlTF_Accessor.Type.VEC4, GlTF_Accessor.ComponentType.USHORT);
jointAccessor.bufferView = GlTF_Writer.vec4UshortBufferView;
GlTF_Writer.accessors.Add(jointAccessor);
}
GlTF_Accessor weightAccessor = null;
if (exportAnimation && m.boneWeights.Length > 0)
{
weightAccessor = new GlTF_Accessor(GlTF_Accessor.GetNameFromObject(m, "weights"), GlTF_Accessor.Type.VEC4, GlTF_Accessor.ComponentType.FLOAT);
weightAccessor.bufferView = GlTF_Writer.vec4BufferView;
GlTF_Writer.accessors.Add(weightAccessor);
}
GlTF_Accessor tangentAccessor = null;
if (m.tangents.Length > 0)
{
tangentAccessor = new GlTF_Accessor(GlTF_Accessor.GetNameFromObject(m, "tangents"), GlTF_Accessor.Type.VEC4, GlTF_Accessor.ComponentType.FLOAT);
tangentAccessor.bufferView = GlTF_Writer.vec4BufferView;
GlTF_Writer.accessors.Add(tangentAccessor);
}
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.colorAccessor = colorAccessor;
attributes.texCoord0Accessor = uv0Accessor;
attributes.texCoord1Accessor = uv1Accessor;
attributes.texCoord2Accessor = uv2Accessor;
attributes.texCoord3Accessor = uv3Accessor;
attributes.jointAccessor = jointAccessor;
attributes.weightAccessor = weightAccessor;
attributes.tangentAccessor = tangentAccessor;
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) {
var mat = sm[i];
var matName = GlTF_Material.GetNameFromObject(mat);
if(GlTF_Writer.materialNames.Contains(matName))
{
primitive.materialIndex = GlTF_Writer.materialNames.IndexOf(matName); // THIS INDIRECTION CAN BE REMOVED!
}
else
{
GlTF_Material material = new GlTF_Material();
material.name = GlTF_Writer.cleanNonAlphanumeric(mat.name);
primitive.materialIndex = GlTF_Writer.materials.Count;
GlTF_Writer.materialNames.Add(matName);
GlTF_Writer.materials.Add (material);
//technique
var s = mat.shader;
var techName = GlTF_Technique.GetNameFromObject(s);
if(GlTF_Writer.techniqueNames.Contains(techName))
{
material.instanceTechniqueIndex = GlTF_Writer.techniqueNames.IndexOf(techName);// THIS INDIRECTION CAN BE REMOVED!
}
else
{
GlTF_Technique tech = new GlTF_Technique();
tech.name = techName;
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();
// Populate technique with shader data
GlTF_Writer.techniqueNames.Add (techName);
GlTF_Writer.techniques.Add (tech);
// 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);
}
unityToPBRMaterial(mat, ref material);
}
}
mesh.primitives.Add(primitive);
}
// If gameobject having SkinnedMeshRenderer component has been transformed,
// the mesh would need to be baked here.
mesh.Populate(m);
GlTF_Writer.meshes.Add(mesh);
node.meshIndex = GlTF_Writer.meshes.IndexOf(mesh);
}
// Parse animations
if (exportAnimation)
{
Animator a = tr.GetComponent<Animator>();
if (a != null)
{
AnimationClip[] clips = AnimationUtility.GetAnimationClips(tr.gameObject);
for (int i = 0; i < clips.Length; i++)
{
//FIXME It seems not good to generate one animation per animator.
GlTF_Animation anim = new GlTF_Animation(GlTF_Writer.cleanNonAlphanumeric(a.name));
anim.Populate(clips[i], tr, GlTF_Writer.bakeAnimation);
if(anim.channels.Count > 0)
GlTF_Writer.animations.Add(anim);
}
}
Animation animation = tr.GetComponent<Animation>();
if (animation != null)
{
AnimationClip clip = animation.clip;
//FIXME It seems not good to generate one animation per animator.
GlTF_Animation anim = new GlTF_Animation(GlTF_Writer.cleanNonAlphanumeric(animation.name));
anim.Populate(clip, tr, GlTF_Writer.bakeAnimation);
if (anim.channels.Count > 0)
GlTF_Writer.animations.Add(anim);
}
}
// Parse transform
if (tr.parent == null)
{
Matrix4x4 mat = Matrix4x4.identity;
if(debugRightHandedScale)
mat.m22 = -1;
mat = mat * Matrix4x4.TRS(tr.localPosition, tr.localRotation, tr.localScale);
node.matrix = new GlTF_Matrix(mat);
}
// Use good transform if parent object is not in selection
else if (!trs.Contains(tr.parent))
{
node.hasParent = false;
Matrix4x4 mat = Matrix4x4.identity;
if(debugRightHandedScale)
mat.m22 = -1;
mat = mat * tr.localToWorldMatrix;
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);
}
if(!node.hasParent)
correctionNode.childrenNames.Add(node.id);
if (tr.GetComponent<Camera>() != null)
{
node.cameraName = GlTF_Writer.cleanNonAlphanumeric(tr.name);
}
else if (tr.GetComponent<Light>() != null)
node.lightName = GlTF_Writer.cleanNonAlphanumeric(tr.name);
// Parse node's skin data
GlTF_Accessor invBindMatrixAccessor = null;
SkinnedMeshRenderer skinMesh = tr.GetComponent<SkinnedMeshRenderer>();
if (exportAnimation && skinMesh != null && skinMesh.enabled && checkSkinValidity(skinMesh, trs) && skinMesh.rootBone != null)
{
GlTF_Skin skin = new GlTF_Skin();
skin.name = GlTF_Writer.cleanNonAlphanumeric(skinMesh.rootBone.name) + "_skeleton_" + GlTF_Writer.cleanNonAlphanumeric(node.name) + tr.GetInstanceID();
// Create invBindMatrices accessor
invBindMatrixAccessor = new GlTF_Accessor(skin.name + "invBindMatrices", GlTF_Accessor.Type.MAT4, GlTF_Accessor.ComponentType.FLOAT);
invBindMatrixAccessor.bufferView = GlTF_Writer.mat4BufferView;
GlTF_Writer.accessors.Add(invBindMatrixAccessor);
// Generate skin data
skin.Populate(tr, ref invBindMatrixAccessor, GlTF_Writer.accessors.Count -1);
GlTF_Writer.skins.Add(skin);
node.skinIndex = GlTF_Writer.skins.IndexOf(skin);
}
foreach (Transform t in tr.transform)
{
if(t.gameObject.activeInHierarchy)
node.childrenNames.Add(GlTF_Node.GetNameFromObject(t));
}
GlTF_Writer.nodeNames.Add(node.id);
GlTF_Writer.nodes.Add (node);
}
if (GlTF_Writer.meshes.Count == 0)
{
Debug.Log("No visible objects have been exported. Aboring export");
yield return false;
}
writer.OpenFiles(path);
writer.Write ();
writer.CloseFiles();
if(nbDisabledObjects > 0)
Debug.Log(nbDisabledObjects + " disabled object ignored during export");
Debug.Log("Scene has been exported to " + path);
if(buildZip)
{
ZipFile zip = new ZipFile();
Debug.Log(GlTF_Writer.exportedFiles.Count + " files generated");
string zipName = Path.GetFileNameWithoutExtension(path) + ".zip";
foreach(string originFilePath in GlTF_Writer.exportedFiles.Keys)
{
zip.AddFile(originFilePath, GlTF_Writer.exportedFiles[originFilePath]);
}
zip.Save(savedPath + "/" + zipName);
// Remove all files
foreach (string pa in GlTF_Writer.exportedFiles.Keys)
{
if (System.IO.File.Exists(pa))
System.IO.File.Delete(pa);
}
Debug.Log("Files have been cleaned");
}
done = true;
yield return true;
}
// Check if all the bones referenced by the skin are in the selection
public bool checkSkinValidity(SkinnedMeshRenderer skin, List<Transform> selection)
{
string unselected = "";
foreach(Transform t in skin.bones)
{
if (!selection.Contains(t))
{
unselected = unselected + "\n" + t.name;
}
}
if(unselected.Length > 0)
{
Debug.LogError("Error while exportin skin for " + skin.name + " (skipping skinning export).\nClick for more details:\n \nThe following bones are used but are not selected" + unselected + "\n");
return false;
}
return true;
}
private string toGlTFname(string name)
{
// remove spaces and illegal chars, replace with underscores
string correctString = name.Replace(" ", "_");
// make sure it doesn't start with a number
return correctString;
}
private bool isInheritedFrom (Type t, Type baseT)
{
if (t == baseT)
return true;
t = t.BaseType;
while (t != null && t != typeof(System.Object))
{
if (t == baseT)
return true;
t = t.BaseType;
}
return false;
}
private Renderer GetRenderer(Transform tr)
{
Renderer mr = tr.GetComponent<MeshRenderer>();
if (mr == null) {
mr = tr.GetComponent<SkinnedMeshRenderer>();
}
return mr;
}
private void clampColor(ref Color c)
{
c.r = c.r > 1.0f ? 1.0f : c.r;
c.g = c.g > 1.0f ? 1.0f : c.g;
c.b = c.b > 1.0f ? 1.0f : c.b;
//c.a = c.a > 1.0f ? 1.0f : c.a;
}
private Mesh GetMesh(Transform tr)
{
var mr = GetRenderer(tr);
Mesh m = null;
if (mr != null && mr.enabled)
{
var t = mr.GetType();
if (t == typeof(MeshRenderer))
{
MeshFilter mf = tr.GetComponent<MeshFilter>();
if(!mf)
{
Debug.Log("The gameObject " + tr.name + " will be exported as Transform (object has no MeshFilter component attached)");
return null;
}
m = mf.sharedMesh;
} else if (t == typeof(SkinnedMeshRenderer))
{
SkinnedMeshRenderer smr = mr as SkinnedMeshRenderer;
m = smr.sharedMesh;
}
}
return m;
}
private bool handleTransparency(ref Material mat, ref GlTF_Material material)
{
if (mat.HasProperty("_Mode") && mat.GetFloat("_Mode") != 0)
{
string mode = mat.GetFloat("_Mode") == 1 ? "MASK" : "BLEND";
GlTF_Material.StringValue alphaMode = new GlTF_Material.StringValue();
alphaMode.name = "alphaMode";
alphaMode.value = mode;
GlTF_Material.FloatValue alphaCutoff = new GlTF_Material.FloatValue();
alphaCutoff.name = "alphaCutoff";
alphaCutoff.value = mat.GetFloat("_Cutoff");
material.values.Add(alphaMode);
material.values.Add(alphaCutoff);
return true;
}
return false;
}
private void addTexturePixels(ref Texture2D texture, ref Color[] colors, IMAGETYPE outputChannel, IMAGETYPE inputChannel = IMAGETYPE.R)
{
int height = texture.height;
int width = texture.width;
Color[] inputColors = new Color[texture.width * texture.height];
if (!texture || !getPixelsFromTexture(ref texture, out inputColors))
return;
if(height * width != colors.Length)
{
Debug.Log("Issue with texture dimensions");
return;
}
if(inputChannel != IMAGETYPE.R && inputChannel != IMAGETYPE.A)
{
Debug.Log("Incorrect input channel (only 'R' and 'A' supported)");
}
for (int i = 0; i < height; ++i)
{
for (int j = 0; j < width; ++j)
{
int index = i * width + j;
int newIndex = (height - i - 1) * width + j;
Color c = outputChannel == IMAGETYPE.RGB ? inputColors[newIndex] : colors[index];
float inputValue = inputChannel == IMAGETYPE.R ? inputColors[newIndex].r : inputColors[newIndex].a;
if(outputChannel == IMAGETYPE.R)
{
c.r = inputValue;
}
else if(outputChannel == IMAGETYPE.G)
{
c.g = inputValue;
}
else if(outputChannel == IMAGETYPE.B)
{
c.b = inputValue;
}
else if(outputChannel == IMAGETYPE.G_INVERT)
{
c.g = 1.0f - inputValue;
}
colors[index] = c;
}
}
}
private int createOcclusionMetallicRoughnessTexture(ref Texture2D occlusion, ref Texture2D metallicRoughness)
{
string texName = "";
int width = -1;
int height = -1;
string assetPath = "";
if(occlusion)
{
texName = texName + GlTF_Texture.GetNameFromObject(occlusion);
assetPath = AssetDatabase.GetAssetPath(occlusion);
width = occlusion.width;
height = occlusion.height;
}
else
{
texName = texName + "_";
}
if (metallicRoughness)
{
texName = texName + GlTF_Texture.GetNameFromObject(metallicRoughness);
assetPath = AssetDatabase.GetAssetPath(metallicRoughness);
width = metallicRoughness.width;
height = metallicRoughness.height;
}
else
{
texName = texName + "_";
}
if (!GlTF_Writer.textureNames.Contains(texName))
{
// Create texture
GlTF_Texture texture = new GlTF_Texture();
texture.name = texName;
// Export image
GlTF_Image img = new GlTF_Image();
img.name = texName;
//img.uri =
// Let's consider that the three textures have the same resolution
Color[] outputColors = new Color[width * height];
for (int i = 0; i < outputColors.Length; ++i)
outputColors[i] = new Color(1.0f, 1.0f, 1.0f);
if (occlusion)
addTexturePixels(ref occlusion, ref outputColors, IMAGETYPE.R);
if (metallicRoughness)
{
addTexturePixels(ref metallicRoughness, ref outputColors, IMAGETYPE.B);
addTexturePixels(ref metallicRoughness, ref outputColors, IMAGETYPE.G_INVERT, IMAGETYPE.A);
}
Texture2D newtex = new Texture2D(width, height);
newtex.SetPixels(outputColors);
newtex.Apply();
string pathInArchive = Path.GetDirectoryName(assetPath);
string exportDir = Path.Combine(savedPath, pathInArchive);
if (!Directory.Exists(exportDir))
Directory.CreateDirectory(exportDir);
string outputFilename = Path.GetFileNameWithoutExtension(assetPath) + "_converted_metalRoughness.jpg";
string exportPath = exportDir + "/" + outputFilename; // relative path inside the .zip
File.WriteAllBytes(exportPath, newtex.EncodeToJPG(jpgQuality));
if (!GlTF_Writer.exportedFiles.ContainsKey(exportPath))
GlTF_Writer.exportedFiles.Add(exportPath, pathInArchive);
else
Debug.LogError("Texture '" + newtex.name + "' already exists");
img.uri = pathInArchive + "/" + outputFilename;
texture.source = GlTF_Writer.imageNames.Count;
GlTF_Writer.imageNames.Add(img.name);
GlTF_Writer.images.Add(img);
// Add sampler
GlTF_Sampler sampler;
var samplerName = GlTF_Sampler.GetNameFromObject(metallicRoughness);
if (!GlTF_Writer.samplerNames.Contains(samplerName))
{
sampler = new GlTF_Sampler(metallicRoughness);
sampler.name = samplerName;
GlTF_Writer.samplers.Add(sampler);
GlTF_Writer.samplerNames.Add(samplerName);
}
GlTF_Writer.textures.Add(texture);
GlTF_Writer.textureNames.Add(texName);
}
return GlTF_Writer.textureNames.IndexOf(texName);
}
// Get or create texture object, image and sampler
private int processTexture(Texture2D t, IMAGETYPE format)
{
var texName = GlTF_Texture.GetNameFromObject(t);
if (AssetDatabase.GetAssetPath(t).Length == 0)
{
Debug.LogWarning("Texture " + t.name + " cannot be found in assets");
return -1;
}
if (!GlTF_Writer.textureNames.Contains(texName))
{
string assetPath = AssetDatabase.GetAssetPath(t);
// Create texture
GlTF_Texture texture = new GlTF_Texture();
texture.name = texName;
// Export image
GlTF_Image img = new GlTF_Image();
img.name = GlTF_Image.GetNameFromObject(t);
img.uri = convertTexture(ref t, assetPath, savedPath, format);
texture.source = GlTF_Writer.imageNames.Count;
GlTF_Writer.imageNames.Add(img.name);
GlTF_Writer.images.Add(img);
// Add sampler
GlTF_Sampler sampler;
var samplerName = GlTF_Sampler.GetNameFromObject(t);
if (!GlTF_Writer.samplerNames.Contains(samplerName))
{
sampler = new GlTF_Sampler(t);
sampler.name = samplerName;
GlTF_Writer.samplers.Add(sampler);
GlTF_Writer.samplerNames.Add(samplerName);
}
GlTF_Writer.textures.Add(texture);
GlTF_Writer.textureNames.Add(texName);
}
return GlTF_Writer.textureNames.IndexOf(texName);
}
// 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)
{