Encode normals

Author: vanruesc

src/passes/GeometryPass.ts

@@ -13,6 +13,7 @@ import {
 	PerspectiveCamera,
 	RGBAFormat,
 	RGBFormat,
+	RGFormat,
 	SRGBColorSpace,
 	Scene,
 	TextureDataType,
@@ -301,7 +302,7 @@ export class GeometryPass extends Pass implements GeometryPassOptions, Selective
 			minFilter: NearestFilter,
 			magFilter: NearestFilter,
 			type: HalfFloatType,
-			format: RGBAFormat
+			format: RGFormat
 		});
 
 		textureConfigs.set(GBuffer.ORM, {

src/shader-chunks/shaders/gbuffer-normal.frag

@@ -1,5 +1,5 @@
 #ifdef out_Normal
 
-	out_Normal = vec4(normal, 1.0);
+	out_Normal.xy = pp_encodeNormal(normal);
 
 #endif

src/shader-chunks/shaders/normal-utils-pars.frag

@@ -1,5 +1,5 @@
 /**
- * Reads a normal vector from a given buffer. Supports octahedron encoding and decoding.
+ * Reads a normal vector from a given buffer.
  *
  * @param normalBuffer - The normal texture.
  * @param uv - The texture coordinates.
@@ -8,14 +8,6 @@
 
 vec3 readNormal(mediump sampler2D normalBuffer, const in vec2 uv) {
 
-	#ifdef PP_NORMAL_VELOCITY
-
-		return pp_decodeNormal(texture(normalBuffer, uv).xy);
-
-	#else
-
-		return texture(normalBuffer, uv).xyz;
-
-	#endif
+	return pp_decodeNormal(texture(normalBuffer, uv).xy);
 
 }

src/utils/ClearValues.ts

@@ -41,7 +41,7 @@ export class ClearValues extends EventDispatcher<BaseEventMap> {
 		this._alpha = null;
 
 		const gBuffer = new ObservableMap<string, Iterable<GLfloat>>([
-			[GBuffer.NORMAL, [0.0, 0.0, 1.0, 0.0]],
+			[GBuffer.NORMAL, [0.0, 0.0]],
 			[GBuffer.ORM, [1.0, 0.0, 0.0, 1.0]],
 			[GBuffer.EMISSION, [0.0, 0.0, 0.0, 1.0]]
 		]);