31 lines
783 B
JavaScript
31 lines
783 B
JavaScript
import TempNode from '../core/TempNode.js';
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import { transformedNormalView } from '../accessors/NormalNode.js';
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import { positionViewDirection } from '../accessors/PositionNode.js';
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import { nodeImmutable, vec2, vec3 } from '../shadernode/ShaderNode.js';
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import { addNodeClass } from '../core/Node.js';
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class MatcapUVNode extends TempNode {
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constructor() {
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super( 'vec2' );
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}
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setup() {
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const x = vec3( positionViewDirection.z, 0, positionViewDirection.x.negate() ).normalize();
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const y = positionViewDirection.cross( x );
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return vec2( x.dot( transformedNormalView ), y.dot( transformedNormalView ) ).mul( 0.495 ).add( 0.5 );
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}
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}
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export default MatcapUVNode;
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export const matcapUV = nodeImmutable( MatcapUVNode );
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addNodeClass( 'MatcapUVNode', MatcapUVNode );
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