ConstNode: Optimize indexes (#30388)

* optimize indexes

* Update webgpu_tsl_compute_attractors_particles.jpg

* cleanup

src/nodes/accessors/BatchNode.js

@@ -76,9 +76,9 @@ class BatchNode extends Node {
 
 		const getIndirectIndex = Fn( ( [ id ] ) => {
 
-			const size = textureSize( textureLoad( this.batchMesh._indirectTexture ), 0 );
-			const x = int( id ).modInt( int( size ) );
-			const y = int( id ).div( int( size ) );
+			const size = int( textureSize( textureLoad( this.batchMesh._indirectTexture ), 0 ) );
+			const x = int( id ).modInt( size );
+			const y = int( id ).div( size );
 			return textureLoad( this.batchMesh._indirectTexture, ivec2( x, y ) ).x;
 
 		} ).setLayout( {

src/nodes/core/ConstNode.js

@@ -1,5 +1,7 @@
 import InputNode from './InputNode.js';
 
+const _regNum = /float|u?int/;
+
 /**
  * Class for representing a constant value in the shader.
  *
@@ -50,6 +52,12 @@ class ConstNode extends InputNode {
 
 		const type = this.getNodeType( builder );
 
+		if ( _regNum.test( type ) && _regNum.test( output ) ) {
+
+			return builder.generateConst( output, this.value );
+
+		}
+
 		return builder.format( this.generateConst( builder ), type, output );
 
 	}

src/nodes/pmrem/PMREMUtils.js

@@ -267,7 +267,7 @@ export const blur = /*@__PURE__*/ Fn( ( { n, latitudinal, poleAxis, outputDirect
 	axis.assign( normalize( axis ) );
 
 	const gl_FragColor = vec3().toVar();
-	gl_FragColor.addAssign( weights.element( int( 0 ) ).mul( getSample( { theta: 0.0, axis, outputDirection, mipInt, envMap, CUBEUV_TEXEL_WIDTH, CUBEUV_TEXEL_HEIGHT, CUBEUV_MAX_MIP } ) ) );
+	gl_FragColor.addAssign( weights.element( 0 ).mul( getSample( { theta: 0.0, axis, outputDirection, mipInt, envMap, CUBEUV_TEXEL_WIDTH, CUBEUV_TEXEL_HEIGHT, CUBEUV_MAX_MIP } ) ) );
 
 	Loop( { start: int( 1 ), end: n }, ( { i } ) => {