first commit

public/sdk/three/jsm/nodes/procedural/CheckerNode.js

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+import TempNode from '../core/TempNode.js';
+import { uv } from '../accessors/UVNode.js';
+import { addNodeClass } from '../core/Node.js';
+import { addNodeElement, tslFn, nodeProxy } from '../shadernode/ShaderNode.js';
+
+const checkerShaderNode = tslFn( ( inputs ) => {
+
+	const uv = inputs.uv.mul( 2.0 );
+
+	const cx = uv.x.floor();
+	const cy = uv.y.floor();
+	const result = cx.add( cy ).mod( 2.0 );
+
+	return result.sign();
+
+} );
+
+class CheckerNode extends TempNode {
+
+	constructor( uvNode = uv() ) {
+
+		super( 'float' );
+
+		this.uvNode = uvNode;
+
+	}
+
+	setup() {
+
+		return checkerShaderNode( { uv: this.uvNode } );
+
+	}
+
+}
+
+export default CheckerNode;
+
+export const checker = nodeProxy( CheckerNode );
+
+addNodeElement( 'checker', checker );
+
+addNodeClass( 'CheckerNode', CheckerNode );