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import TempNode from '../core/TempNode.js';
import { vec2, vec3, negate, normalize, cross, dot, mul, add, transformedNormalView, positionViewDirection } from '../shadernode/ShaderNodeBaseElements.js';
class MatcapUVNode extends TempNode {
constructor() {
super( 'vec2' );
}
construct() {
const x = normalize( vec3( positionViewDirection.z, 0, negate( positionViewDirection.x ) ) );
const y = cross( positionViewDirection, x );
return add( mul( vec2( dot( x, transformedNormalView ), dot( y, transformedNormalView ) ), 0.495 ), 0.5 );
}
}
export default MatcapUVNode;