three 基础库
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import NodeBuilder from '../../nodes/core/NodeBuilder.js';
import NodeSlot from '../../nodes/core/NodeSlot.js';
class WebGLNodeBuilder extends NodeBuilder {
constructor( material, renderer, properties ) {
super( material, renderer );
this.properties = properties;
this._parseMaterial();
}
_parseMaterial() {
const material = this.material;
// parse inputs
if ( material.colorNode !== undefined ) {
this.addSlot( 'fragment', new NodeSlot( material.colorNode, 'COLOR', 'vec4' ) );
}
}
getVaryFromNode( node, type ) {
const vary = super.getVaryFromNode( node, type );
if ( node.isUVNode ) {
vary.name = 'vUv';
}
return vary;
}
getTexture( textureProperty, uvSnippet ) {
return `sRGBToLinear( texture2D( ${textureProperty}, ${uvSnippet} ) )`;
}
getUniformsHeaderSnippet( shaderStage ) {
const uniforms = this.uniforms[ shaderStage ];
let snippet = '';
for ( const uniform of uniforms ) {
if ( uniform.type === 'texture' ) {
snippet += `uniform sampler2D ${uniform.name};`;
} else {
const vectorType = this.getVectorType( uniform.type );
snippet += `uniform ${vectorType} ${uniform.name};`;
}
}
return snippet;
}
getAttributesHeaderSnippet( /*shaderStage*/ ) {
}
getVarsHeaderSnippet( /*shaderStage*/ ) {
}
getVarsBodySnippet( /*shaderStage*/ ) {
}
getVarysHeaderSnippet( /*shaderStage*/ ) {
}
getVarysBodySnippet( /*shaderStage*/ ) {
}
composeUniforms() {
const uniforms = this.uniforms[ 'fragment' ];
for ( const uniform of uniforms ) {
this.properties.uniforms[ uniform.name ] = uniform;
}
}
build() {
super.build();
this.properties.defines[ 'NODE_HEADER_UNIFORMS' ] = this.defines[ 'fragment' ][ 'NODE_HEADER_UNIFORMS' ];
this.properties.defines[ 'NODE_COLOR' ] = this.defines[ 'fragment' ][ 'NODE_COLOR' ];
this.composeUniforms();
return this;
}
}
export { WebGLNodeBuilder };