update headers

ios/include/gltfio/volume.mat

@@ -0,0 +1,147 @@
+material {
+    name : volume_ubershader,
+    requires : [ uv0, uv1, color ],
+    shadingModel : lit,
+    blending : masked,
+    doubleSided : false,
+    transparency : default,
+    flipUV : false,
+    specularAmbientOcclusion : simple,
+    specularAntiAliasing : true,
+    refractionMode: screenspace,
+    refractionType: solid,
+    reflections: screenspace,
+    parameters : [
+
+        // Base Color
+        { type : int, name : baseColorIndex },
+        { type : float4, name : baseColorFactor },
+        { type : sampler2d, name : baseColorMap },
+        { type : mat3, name : baseColorUvMatrix, precision: high },
+
+        // Metallic-Roughness Map
+        { type : int, name : metallicRoughnessIndex },
+        { type : float, name : metallicFactor },
+        { type : float, name : roughnessFactor },
+        { type : sampler2d, name : metallicRoughnessMap },
+        { type : mat3, name : metallicRoughnessUvMatrix, precision: high },
+
+        // Normal Map
+        { type : int, name : normalIndex },
+        { type : float, name : normalScale },
+        { type : sampler2d, name : normalMap },
+        { type : mat3, name : normalUvMatrix, precision: high },
+
+        // Ambient Occlusion
+        { type : int, name : aoIndex },
+        { type : float, name : aoStrength },
+        { type : sampler2d, name : occlusionMap },
+        { type : mat3, name : occlusionUvMatrix, precision: high },
+
+        // Emissive Map
+        { type : int, name : emissiveIndex },
+        { type : float3, name : emissiveFactor },
+        { type : float, name : emissiveStrength },
+        { type : sampler2d, name : emissiveMap },
+        { type : mat3, name : emissiveUvMatrix, precision: high },
+
+        // Transmission Map
+        { type : int, name : transmissionIndex },
+        { type : float, name : transmissionFactor },
+        { type : sampler2d, name : transmissionMap },
+        { type : mat3, name : transmissionUvMatrix, precision: high },
+
+        // Volume Map
+        { type : float3, name : volumeAbsorption },
+        { type : int, name : volumeThicknessIndex },
+        { type : float, name : volumeThicknessFactor },
+        { type : sampler2d, name : volumeThicknessMap },
+        { type : mat3, name : volumeThicknessUvMatrix, precision: high },
+
+        // IOR
+        { type : float, name : ior }
+
+
+        ${CUSTOM_PARAMS}
+    ],
+}
+
+vertex {
+  void materialVertex(inout MaterialVertexInputs material) {
+      ${CUSTOM_VERTEX}
+    }
+}
+
+fragment {
+    void material(inout MaterialInputs material) {
+        highp float2 uvs[2];
+        uvs[0] = getUV0();
+        uvs[1] = getUV1();
+
+        if (materialParams.normalIndex > -1) {
+            highp float2 uv = uvs[materialParams.normalIndex];
+            uv = (vec3(uv, 1.0) * materialParams.normalUvMatrix).xy;
+            material.normal = texture(materialParams_normalMap, uv).xyz * 2.0 - 1.0;
+            material.normal.xy *= materialParams.normalScale;
+        }
+
+        prepareMaterial(material);
+        material.baseColor = materialParams.baseColorFactor;
+
+        if (materialParams.baseColorIndex > -1) {
+            highp float2 uv = uvs[materialParams.baseColorIndex];
+            uv = (vec3(uv, 1.0) * materialParams.baseColorUvMatrix).xy;
+            material.baseColor *= texture(materialParams_baseColorMap, uv);
+        }
+
+        #if defined(BLEND_MODE_TRANSPARENT)
+            material.baseColor.rgb *= material.baseColor.a;
+        #endif
+
+        material.baseColor *= getColor();
+
+        material.roughness = materialParams.roughnessFactor;
+        material.metallic = materialParams.metallicFactor;
+        material.transmission = materialParams.transmissionFactor;
+        material.absorption = materialParams.volumeAbsorption;
+        material.thickness = materialParams.volumeThicknessFactor * getObjectUniforms().userData;
+        material.ior = materialParams.ior;
+
+        material.emissive = vec4(materialParams.emissiveStrength *
+                materialParams.emissiveFactor.rgb, 0.0);
+
+        if (materialParams.transmissionIndex > -1) {
+            highp float2 uv = uvs[materialParams.transmissionIndex];
+            uv = (vec3(uv, 1.0) * materialParams.transmissionUvMatrix).xy;
+            material.transmission *= texture(materialParams_transmissionMap, uv).r;
+        }
+
+        if (materialParams.volumeThicknessIndex > -1) {
+            highp float2 uv = uvs[materialParams.volumeThicknessIndex];
+            uv = (vec3(uv, 1.0) * materialParams.volumeThicknessUvMatrix).xy;
+            material.thickness *= texture(materialParams_volumeThicknessMap, uv).g;
+        }
+
+        if (materialParams.metallicRoughnessIndex > -1) {
+            highp float2 uv = uvs[materialParams.metallicRoughnessIndex];
+            uv = (vec3(uv, 1.0) * materialParams.metallicRoughnessUvMatrix).xy;
+            vec4 mr = texture(materialParams_metallicRoughnessMap, uv);
+            material.roughness *= mr.g;
+            material.metallic *= mr.b;
+        }
+
+        if (materialParams.aoIndex > -1) {
+            highp float2 uv = uvs[materialParams.aoIndex];
+            uv = (vec3(uv, 1.0) * materialParams.occlusionUvMatrix).xy;
+            float occlusion = texture(materialParams_occlusionMap, uv).r;
+            material.ambientOcclusion = 1.0 + materialParams.aoStrength * (occlusion - 1.0);
+        }
+        if (materialParams.emissiveIndex > -1) {
+            highp float2 uv = uvs[materialParams.emissiveIndex];
+            uv = (vec3(uv, 1.0) * materialParams.emissiveUvMatrix).xy;
+            material.emissive.rgb *= texture(materialParams_emissiveMap, uv).rgb;
+        }
+
+        ${CUSTOM_FRAGMENT}
+    }
+}