79 lines
1.9 KiB
JavaScript
79 lines
1.9 KiB
JavaScript
import Node, { addNodeClass } from '../core/Node.js';
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import { normalLocal } from './NormalNode.js';
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import { positionLocal } from './PositionNode.js';
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import { nodeProxy, vec3, mat3, mat4, int, ivec2, float } from '../shadernode/ShaderNode.js';
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import { textureLoad } from './TextureNode.js';
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import { textureSize } from './TextureSizeNode.js';
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import { attribute } from '../core/AttributeNode.js';
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import { tangentLocal } from './TangentNode.js';
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class BatchNode extends Node {
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constructor( batchMesh ) {
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super( 'void' );
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this.batchMesh = batchMesh;
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this.instanceColorNode = null;
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this.batchingIdNode = null;
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}
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setup( builder ) {
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// POSITION
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if ( this.batchingIdNode === null ) {
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this.batchingIdNode = attribute( 'batchId' );
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}
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const matriceTexture = this.batchMesh._matricesTexture;
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const size = textureSize( textureLoad( matriceTexture ), 0 );
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const j = float( int( this.batchingIdNode ) ).mul( 4 ).toVar();
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const x = int( j.mod( size ) );
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const y = int( j ).div( int( size ) );
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const batchingMatrix = mat4(
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textureLoad( matriceTexture, ivec2( x, y ) ),
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textureLoad( matriceTexture, ivec2( x.add( 1 ), y ) ),
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textureLoad( matriceTexture, ivec2( x.add( 2 ), y ) ),
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textureLoad( matriceTexture, ivec2( x.add( 3 ), y ) )
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);
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const bm = mat3(
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batchingMatrix[ 0 ].xyz,
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batchingMatrix[ 1 ].xyz,
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batchingMatrix[ 2 ].xyz
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);
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positionLocal.assign( batchingMatrix.mul( positionLocal ) );
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const transformedNormal = normalLocal.div( vec3( bm[ 0 ].dot( bm[ 0 ] ), bm[ 1 ].dot( bm[ 1 ] ), bm[ 2 ].dot( bm[ 2 ] ) ) );
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const batchingNormal = bm.mul( transformedNormal ).xyz;
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normalLocal.assign( batchingNormal );
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if ( builder.hasGeometryAttribute( 'tangent' ) ) {
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tangentLocal.mulAssign( bm );
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}
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}
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}
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export default BatchNode;
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export const batch = nodeProxy( BatchNode );
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addNodeClass( 'batch', BatchNode );
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