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using System;
using System.Collections.Generic;
using System.Linq;
using UniGLTF;
using UniGLTF.ShaderPropExporter;
using UnityEngine;
namespace VRM
{
public class VRMMaterialExporter : MaterialExporter
{
public static bool UseUnlit(string shaderName)
{
switch (shaderName)
{
case "Unlit/Color":
case "Unlit/Texture":
case "Unlit/Transparent":
case "Unlit/Transparent Cutout":
case "UniGLTF/UniUnlit":
case "VRM/UnlitTexture":
case "VRM/UnlitTransparent":
case "VRM/UnlitCutout":
return true;
}
return false;
}
protected override glTFMaterial CreateMaterial(Material m)
{
switch (m.shader.name)
{
case "VRM/UnlitTexture":
return Export_VRMUnlitTexture(m);
case "VRM/UnlitTransparent":
return Export_VRMUnlitTransparent(m);
case "VRM/UnlitCutout":
return Export_VRMUnlitCutout(m);
case "VRM/UnlitTransparentZWrite":
return Export_VRMUnlitTransparentZWrite(m);
case "VRM/MToon":
return Export_VRMMToon(m);
default:
return base.CreateMaterial(m);
}
}
static glTFMaterial Export_VRMUnlitTexture(Material m)
{
var material = glTF_KHR_materials_unlit.CreateDefault();
material.alphaMode = "OPAQUE";
return material;
}
static glTFMaterial Export_VRMUnlitTransparent(Material m)
{
var material = glTF_KHR_materials_unlit.CreateDefault();
material.alphaMode = "BLEND";
return material;
}
static glTFMaterial Export_VRMUnlitCutout(Material m)
{
var material = glTF_KHR_materials_unlit.CreateDefault();
material.alphaMode = "MASK";
return material;
}
static glTFMaterial Export_VRMUnlitTransparentZWrite(Material m)
{
var material = glTF_KHR_materials_unlit.CreateDefault();
material.alphaMode = "BLEND";
return material;
}
static glTFMaterial Export_VRMMToon(Material m)
{
var material = glTF_KHR_materials_unlit.CreateDefault();
switch (m.GetTag("RenderType", true))
{
case "Transparent":
material.alphaMode = "BLEND";
break;
case "TransparentCutout":
material.alphaMode = "MASK";
material.alphaCutoff = m.GetFloat("_Cutoff");
break;
default:
material.alphaMode = "OPAQUE";
break;
}
switch ((int)m.GetFloat("_CullMode"))
{
case 0:
material.doubleSided = true;
break;
case 1:
Debug.LogWarning("ignore cull front");
break;
case 2:
// cull back
break;
default:
throw new NotImplementedException();
}
return material;
}
#region CreateFromMaterial
public static readonly string[] VRMExtensionShaders = new string[]
{
"VRM/UnlitTransparentZWrite",
"VRM/MToon"
};
static readonly string[] TAGS = new string[]{
"RenderType",
// "Queue",
};
public static glTF_VRM_Material CreateFromMaterial(Material m, List<Texture> textures)
{
var material = new glTF_VRM_Material
{
name = m.name,
shader = m.shader.name,
renderQueue = m.renderQueue,
};
if (!VRMExtensionShaders.Contains(m.shader.name))
{
material.shader = glTF_VRM_Material.VRM_USE_GLTFSHADER;
return material;
}
var prop = PreShaderPropExporter.GetPropsForSupportedShader(m.shader.name);
if (prop == null)
{
Debug.LogWarningFormat("Fail to export shader: {0}", m.shader.name);
}
else
{
foreach (var keyword in m.shaderKeywords)
{
material.keywordMap.Add(keyword, m.IsKeywordEnabled(keyword));
}
// get properties
//material.SetProp(prop);
foreach (var kv in prop.Properties)
{
switch (kv.ShaderPropertyType)
{
case ShaderPropertyType.Color:
{
var value = m.GetColor(kv.Key).ToArray();
material.vectorProperties.Add(kv.Key, value);
}
break;
case ShaderPropertyType.Range:
case ShaderPropertyType.Float:
{
var value = m.GetFloat(kv.Key);
material.floatProperties.Add(kv.Key, value);
}
break;
case ShaderPropertyType.TexEnv:
{
var texture = m.GetTexture(kv.Key);
if (texture != null)
{
var value = textures.IndexOf(texture);
if (value == -1)
{
Debug.LogFormat("not found {0}", texture.name);
}
else
{
material.textureProperties.Add(kv.Key, value);
}
}
// offset & scaling
var offset = m.GetTextureOffset(kv.Key);
var scaling = m.GetTextureScale(kv.Key);
material.vectorProperties.Add(kv.Key,
new float[] { offset.x, offset.y, scaling.x, scaling.y });
}
break;
case ShaderPropertyType.Vector:
{
var value = m.GetVector(kv.Key).ToArray();
material.vectorProperties.Add(kv.Key, value);
}
break;
default:
throw new NotImplementedException();
}
}
}
foreach (var tag in TAGS)
{
var value = m.GetTag(tag, false);
if (!String.IsNullOrEmpty(value))
{
material.tagMap.Add(tag, value);
}
}
return material;
}
#endregion
}
}
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