mirror of
https://github.com/tengge1/ShadowEditor.git
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50 lines
1.4 KiB
JavaScript
50 lines
1.4 KiB
JavaScript
/**
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* @author sunag / http://www.sunag.com.br/
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*/
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THREE.BumpNode = function( value, coord, scale ) {
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THREE.TempNode.call( this, 'v3' );
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this.value = value;
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this.coord = coord || new THREE.UVNode();
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this.scale = scale || new THREE.Vector2Node( 1, 1 );
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};
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THREE.BumpNode.fBumpToNormal = new THREE.FunctionNode( [
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"vec3 bumpToNormal( sampler2D bumpMap, vec2 uv, vec2 scale ) {",
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" vec2 dSTdx = dFdx( uv );",
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" vec2 dSTdy = dFdy( uv );",
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" float Hll = texture2D( bumpMap, uv ).x;",
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" float dBx = texture2D( bumpMap, uv + dSTdx ).x - Hll;",
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" float dBy = texture2D( bumpMap, uv + dSTdy ).x - Hll;",
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" return vec3( .5 + ( dBx * scale.x ), .5 + ( dBy * scale.y ), 1.0 );",
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"}"
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].join( "\n" ), null, { derivatives: true } );
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THREE.BumpNode.prototype = Object.create( THREE.TempNode.prototype );
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THREE.BumpNode.prototype.constructor = THREE.BumpNode;
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THREE.BumpNode.prototype.generate = function( builder, output ) {
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var material = builder.material, func = THREE.BumpNode.fBumpToNormal;
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builder.include( func );
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if ( builder.isShader( 'fragment' ) ) {
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return builder.format( func.name + '(' + this.value.build( builder, 'sampler2D' ) + ',' +
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this.coord.build( builder, 'v2' ) + ',' +
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this.scale.build( builder, 'v2' ) + ')', this.getType( builder ), output );
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} else {
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console.warn( "THREE.BumpNode is not compatible with " + builder.shader + " shader." );
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return builder.format( 'vec3( 0.0 )', this.getType( builder ), output );
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}
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};
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