IEnumerator LoadMaterials()
{
using (MeasureTime("LoadMaterials"))
{
if (GLTF.materials == null || !GLTF.materials.Any())
{
AddMaterial(MaterialImporter.CreateMaterial(0, null, false));
}
else
{
for (int i = 0; i < GLTF.materials.Count; ++i)
{
AddMaterial(MaterialImporter.CreateMaterial(i, GLTF.materials[i], GLTF.MaterialHasVertexColor(i)));
}
}
}
yield return(null);
}
/// StandardShader vaiables
///
/// _Color
/// _MainTex
/// _Cutoff
/// _Glossiness
/// _Metallic
/// _MetallicGlossMap
/// _BumpScale
/// _BumpMap
/// _Parallax
/// _ParallaxMap
/// _OcclusionStrength
/// _OcclusionMap
/// _EmissionColor
/// _EmissionMap
/// _DetailMask
/// _DetailAlbedoMap
/// _DetailNormalMapScale
/// _DetailNormalMap
/// _UVSec
/// _EmissionScaleUI
/// _EmissionColorUI
/// _Mode
/// _SrcBlend
/// _DstBlend
/// _ZWrite
public virtual Material CreateMaterial(glTF gltf, int i, glTFMaterial x)
{
var shader = m_shaderStore.GetShader(x);
//Debug.LogFormat("[{0}]{1}", i, shader.name);
var material = new Material(shader);
#if UNITY_EDITOR
// textureImporter.SaveAndReimport(); may destory this material
material.hideFlags = HideFlags.DontUnloadUnusedAsset;
#endif
material.name = (x == null || string.IsNullOrEmpty(x.name))
? string.Format("material_{0:00}", i)
: x.name
;
if (x == null)
{
Debug.LogWarning("glTFMaterial is empty");
return(material);
}
// unlit material
if (x.extensions != null && x.extensions.KHR_materials_unlit != null)
{
// texture
if (x.pbrMetallicRoughness.baseColorTexture != null)
{
var texture = m_context.GetTexture(x.pbrMetallicRoughness.baseColorTexture.index);
if (texture != null)
{
material.mainTexture = texture.Texture;
}
}
// color
if (x.pbrMetallicRoughness.baseColorFactor != null && x.pbrMetallicRoughness.baseColorFactor.Length == 4)
{
var color = x.pbrMetallicRoughness.baseColorFactor;
material.color = new Color(color[0], color[1], color[2], color[3]);
}
//renderMode
if (x.alphaMode == "OPAQUE")
{
Utils.SetRenderMode(material, UniUnlitRenderMode.Opaque);
}
else if (x.alphaMode == "BLEND")
{
Utils.SetRenderMode(material, UniUnlitRenderMode.Transparent);
}
else if (x.alphaMode == "MASK")
{
Utils.SetRenderMode(material, UniUnlitRenderMode.Cutout);
}
else
{
// default OPAQUE
Utils.SetRenderMode(material, UniUnlitRenderMode.Opaque);
}
// culling
if (x.doubleSided)
{
Utils.SetCullMode(material, UniUnlitCullMode.Off);
}
else
{
Utils.SetCullMode(material, UniUnlitCullMode.Back);
}
// VColor
if (gltf != null && gltf.MaterialHasVertexColor(x))
{
Utils.SetVColBlendMode(material, UniUnlitVertexColorBlendOp.Multiply);
}
Utils.ValidateProperties(material, true);
return(material);
}
// PBR material
if (x.pbrMetallicRoughness != null)
{
if (x.pbrMetallicRoughness.baseColorFactor != null && x.pbrMetallicRoughness.baseColorFactor.Length == 4)
{
var color = x.pbrMetallicRoughness.baseColorFactor;
material.color = new Color(color[0], color[1], color[2], color[3]);
}
if (x.pbrMetallicRoughness.baseColorTexture != null && x.pbrMetallicRoughness.baseColorTexture.index != -1)
{
var texture = m_context.GetTexture(x.pbrMetallicRoughness.baseColorTexture.index);
if (texture != null)
{
material.mainTexture = texture.Texture;
}
}
if (x.pbrMetallicRoughness.metallicRoughnessTexture != null && x.pbrMetallicRoughness.metallicRoughnessTexture.index != -1)
{
material.EnableKeyword("_METALLICGLOSSMAP");
var texture = Context.GetTexture(x.pbrMetallicRoughness.metallicRoughnessTexture.index);
if (texture != null)
{
var prop = "_MetallicGlossMap";
// Bake roughnessFactor values into a texture.
material.SetTexture(prop, texture.ConvertTexture(prop, x.pbrMetallicRoughness.roughnessFactor));
}
material.SetFloat("_Metallic", 1.0f);
// Set 1.0f as hard-coded. See: https://github.com/dwango/UniVRM/issues/212.
material.SetFloat("_GlossMapScale", 1.0f);
}
else
{
material.SetFloat("_Metallic", x.pbrMetallicRoughness.metallicFactor);
material.SetFloat("_Glossiness", 1.0f - x.pbrMetallicRoughness.roughnessFactor);
}
}
if (x.normalTexture != null && x.normalTexture.index != -1)
{
material.EnableKeyword("_NORMALMAP");
var texture = Context.GetTexture(x.normalTexture.index);
if (texture != null)
{
var prop = "_BumpMap";
material.SetTexture(prop, texture.ConvertTexture(prop));
material.SetFloat("_BumpScale", x.normalTexture.scale);
}
}
if (x.occlusionTexture != null && x.occlusionTexture.index != -1)
{
var texture = Context.GetTexture(x.occlusionTexture.index);
if (texture != null)
{
var prop = "_OcclusionMap";
material.SetTexture(prop, texture.ConvertTexture(prop));
material.SetFloat("_OcclusionStrength", x.occlusionTexture.strength);
}
}
if (x.emissiveFactor != null ||
(x.emissiveTexture != null && x.emissiveTexture.index != -1))
{
material.EnableKeyword("_EMISSION");
material.globalIlluminationFlags &= ~MaterialGlobalIlluminationFlags.EmissiveIsBlack;
if (x.emissiveFactor != null && x.emissiveFactor.Length == 3)
{
material.SetColor("_EmissionColor", new Color(x.emissiveFactor[0], x.emissiveFactor[1], x.emissiveFactor[2]));
}
if (x.emissiveTexture != null && x.emissiveTexture.index != -1)
{
var texture = Context.GetTexture(x.emissiveTexture.index);
if (texture != null)
{
material.SetTexture("_EmissionMap", texture.Texture);
}
}
}
BlendMode blendMode = BlendMode.Opaque;
// https://forum.unity.com/threads/standard-material-shader-ignoring-setfloat-property-_mode.344557/#post-2229980
switch (x.alphaMode)
{
case "BLEND":
blendMode = BlendMode.Fade;
material.SetOverrideTag("RenderType", "Transparent");
material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
material.SetInt("_ZWrite", 0);
material.DisableKeyword("_ALPHATEST_ON");
material.EnableKeyword("_ALPHABLEND_ON");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 3000;
break;
case "MASK":
blendMode = BlendMode.Cutout;
material.SetOverrideTag("RenderType", "TransparentCutout");
material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
material.SetInt("_ZWrite", 1);
material.SetFloat("_Cutoff", x.alphaCutoff);
material.EnableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 2450;
break;
default: // OPAQUE
blendMode = BlendMode.Opaque;
material.SetOverrideTag("RenderType", "");
material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
material.SetInt("_ZWrite", 1);
material.DisableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = -1;
break;
}
material.SetFloat("_Mode", (float)blendMode);
return(material);
}