You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
1.9 KiB
63 lines
1.9 KiB
6 months ago
|
import Node, { addNodeClass } from '../core/Node.js';
|
||
|
|
import { add } from '../math/OperatorNode.js';
|
||
|
|
import { normalLocal } from '../accessors/NormalNode.js';
|
||
|
|
import { positionLocal } from '../accessors/PositionNode.js';
|
||
|
|
import { texture } from '../accessors/TextureNode.js';
|
||
|
|
import { addNodeElement, nodeProxy, float, vec3 } from '../shadernode/ShaderNode.js';
|
||
|
|
|
||
|
|
class TriplanarTexturesNode extends Node {
|
||
|
|
|
||
|
|
constructor( textureXNode, textureYNode = null, textureZNode = null, scaleNode = float( 1 ), positionNode = positionLocal, normalNode = normalLocal ) {
|
||
|
|
|
||
|
|
super( 'vec4' );
|
||
|
|
|
||
|
|
this.textureXNode = textureXNode;
|
||
|
|
this.textureYNode = textureYNode;
|
||
|
|
this.textureZNode = textureZNode;
|
||
|
|
|
||
|
|
this.scaleNode = scaleNode;
|
||
|
|
|
||
|
|
this.positionNode = positionNode;
|
||
|
|
this.normalNode = normalNode;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
setup() {
|
||
|
|
|
||
|
|
const { textureXNode, textureYNode, textureZNode, scaleNode, positionNode, normalNode } = this;
|
||
|
|
|
||
|
|
// Ref: https://github.com/keijiro/StandardTriplanar
|
||
|
|
|
||
|
|
// Blending factor of triplanar mapping
|
||
|
|
let bf = normalNode.abs().normalize();
|
||
|
|
bf = bf.div( bf.dot( vec3( 1.0 ) ) );
|
||
|
|
|
||
|
|
// Triplanar mapping
|
||
|
|
const tx = positionNode.yz.mul( scaleNode );
|
||
|
|
const ty = positionNode.zx.mul( scaleNode );
|
||
|
|
const tz = positionNode.xy.mul( scaleNode );
|
||
|
|
|
||
|
|
// Base color
|
||
|
|
const textureX = textureXNode.value;
|
||
|
|
const textureY = textureYNode !== null ? textureYNode.value : textureX;
|
||
|
|
const textureZ = textureZNode !== null ? textureZNode.value : textureX;
|
||
|
|
|
||
|
|
const cx = texture( textureX, tx ).mul( bf.x );
|
||
|
|
const cy = texture( textureY, ty ).mul( bf.y );
|
||
|
|
const cz = texture( textureZ, tz ).mul( bf.z );
|
||
|
|
|
||
|
|
return add( cx, cy, cz );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
export default TriplanarTexturesNode;
|
||
|
|
|
||
|
|
export const triplanarTextures = nodeProxy( TriplanarTexturesNode );
|
||
|
|
export const triplanarTexture = ( ...params ) => triplanarTextures( ...params );
|
||
|
|
|
||
|
|
addNodeElement( 'triplanarTexture', triplanarTexture );
|
||
|
|
|
||
|
|
addNodeClass( 'TriplanarTexturesNode', TriplanarTexturesNode );
|