最新代码

public/sdk/three/jsm/nodes/math/HashNode.js

@@ -0,0 +1,34 @@
+import Node, { addNodeClass } from '../core/Node.js';
+import { addNodeElement, nodeProxy } from '../shadernode/ShaderNode.js';
+
+class HashNode extends Node {
+
+	constructor( seedNode ) {
+
+		super();
+
+		this.seedNode = seedNode;
+
+	}
+
+	setup( /*builder*/ ) {
+
+		// Taken from https://www.shadertoy.com/view/XlGcRh, originally from pcg-random.org
+
+		const state = this.seedNode.uint().mul( 747796405 ).add( 2891336453 );
+		const word = state.shiftRight( state.shiftRight( 28 ).add( 4 ) ).bitXor( state ).mul( 277803737 );
+		const result = word.shiftRight( 22 ).bitXor( word );
+
+		return result.float().mul( 1 / 2 ** 32 ); // Convert to range [0, 1)
+
+	}
+
+}
+
+export default HashNode;
+
+export const hash = nodeProxy( HashNode );
+
+addNodeElement( 'hash', hash );
+
+addNodeClass( 'HashNode', HashNode );