Merge pull request gkjohnson#655 from dongho-shin/dev/add-alphaMapTransform

Add alphaMapTransform

Author: gkjohnson

src/materials/pathtracing/PhysicalPathTracingMaterial.js

@@ -10,7 +10,7 @@ import { PhysicalCameraUniform } from '../../uniforms/PhysicalCameraUniform.js';
 import { EquirectHdrInfoUniform } from '../../uniforms/EquirectHdrInfoUniform.js';
 import { LightsInfoUniformStruct } from '../../uniforms/LightsInfoUniformStruct.js';
 import { AttributesTextureArray } from '../../uniforms/AttributesTextureArray.js';
-import { MaterialsTexture } from '../../uniforms/MaterialsTexture.js';
+import { MaterialsTexture, MATERIAL_PIXELS } from '../../uniforms/MaterialsTexture.js';
 import { RenderTarget2DArray } from '../../uniforms/RenderTarget2DArray.js';
 import { StratifiedSamplesTexture } from '../../uniforms/StratifiedSamplesTexture.js';
 import { BlueNoiseTexture } from '../../textures/BlueNoiseTexture.js';
@@ -66,6 +66,7 @@ export class PhysicalPathTracingMaterial extends MaterialBase {
 				ATTR_TANGENT: 1,
 				ATTR_UV: 2,
 				ATTR_COLOR: 3,
+				MATERIAL_PIXELS: MATERIAL_PIXELS,
 			},
 
 			uniforms: {

src/materials/pathtracing/glsl/attenuate_hit_function.glsl.js

@@ -97,7 +97,8 @@ export const attenuate_hit_function = /* glsl */`
 				// alphaMap
 				if ( material.alphaMap != - 1 ) {
 
-					albedo.a *= texture2D( textures, vec3( uv, material.alphaMap ) ).x;
+					vec3 uvPrime = material.alphaMapTransform * vec3( uv, 1 );
+					albedo.a *= texture2D( textures, vec3( uvPrime.xy, material.alphaMap ) ).x;
 
 				}
 

src/materials/pathtracing/glsl/get_surface_record_function.glsl.js

@@ -48,7 +48,8 @@ export const get_surface_record_function = /* glsl */`
 		// alphaMap
 		if ( material.alphaMap != - 1 ) {
 
-			albedo.a *= texture2D( textures, vec3( uv, material.alphaMap ) ).x;
+			vec3 uvPrime = material.alphaMapTransform * vec3( uv, 1 );
+			albedo.a *= texture2D( textures, vec3( uvPrime.xy, material.alphaMap ) ).x;
 
 		}
 

src/shader/bvh/inside_fog_volume_function.glsl.js

@@ -7,7 +7,7 @@ export const inside_fog_volume_function = /* glsl */`
 // returns whether the given material is a fog material or not
 bool isMaterialFogVolume( sampler2D materials, uint materialIndex ) {
 
-	uint i = materialIndex * 45u;
+	uint i = materialIndex * uint( MATERIAL_PIXELS );
 	vec4 s14 = texelFetch1D( materials, i + 14u );
 	return bool( int( s14.b ) & 4 );
 

src/shader/structs/material_struct.glsl.js

@@ -81,6 +81,7 @@ export const material_struct = /* glsl */ `
 		mat3 iridescenceThicknessMapTransform;
 		mat3 specularColorMapTransform;
 		mat3 specularIntensityMapTransform;
+		mat3 alphaMapTransform;
 
 	};
 
@@ -101,7 +102,7 @@ export const material_struct = /* glsl */ `
 
 	Material readMaterialInfo( sampler2D tex, uint index ) {
 
-		uint i = index * 45u;
+		uint i = index * uint( MATERIAL_PIXELS );
 
 		vec4 s0 = texelFetch1D( tex, i + 0u );
 		vec4 s1 = texelFetch1D( tex, i + 1u );
@@ -200,6 +201,7 @@ export const material_struct = /* glsl */ `
 		m.iridescenceThicknessMapTransform = m.iridescenceThicknessMap == - 1 ? mat3( 1.0 ) : readTextureTransform( tex, firstTextureTransformIdx + 24u );
 		m.specularColorMapTransform = m.specularColorMap == - 1 ? mat3( 1.0 ) : readTextureTransform( tex, firstTextureTransformIdx + 26u );
 		m.specularIntensityMapTransform = m.specularIntensityMap == - 1 ? mat3( 1.0 ) : readTextureTransform( tex, firstTextureTransformIdx + 28u );
+		m.alphaMapTransform = m.alphaMap == - 1 ? mat3( 1.0 ) : readTextureTransform( tex, firstTextureTransformIdx + 30u );
 
 		return m;
 

src/uniforms/MaterialsTexture.js

@@ -2,7 +2,7 @@ import { DataTexture, RGBAFormat, ClampToEdgeWrapping, FloatType, FrontSide, Bac
 import { getTextureHash } from '../core/utils/sceneUpdateUtils.js';
 import { bufferToHash } from '../utils/bufferToHash.js';
 
-const MATERIAL_PIXELS = 45;
+export const MATERIAL_PIXELS = 47;
 const MATERIAL_STRIDE = MATERIAL_PIXELS * 4;
 
 class MaterialFeatures {
@@ -427,6 +427,9 @@ export class MaterialsTexture extends DataTexture {
 			// specularIntensityMap transform 43
 			index += writeTextureMatrixToArray( m, 'specularIntensityMap', floatArray, index );
 
+			// alphaMap transform 45
+			index += writeTextureMatrixToArray( m, 'alphaMap', floatArray, index );
+
 		}
 
 		// check if the contents have changed