添加关照、全局等高线、修改图层问题

dist/electron/static/sdk/three/jsm/transpiler/ShaderToyDecoder.js

@@ -0,0 +1,49 @@
+import { Return, VariableDeclaration, Accessor } from './AST.js';
+import GLSLDecoder from './GLSLDecoder.js';
+
+class ShaderToyDecoder extends GLSLDecoder {
+
+	constructor() {
+
+		super();
+
+		this.addPolyfill( 'iTime', 'float iTime = timerGlobal();' );
+		this.addPolyfill( 'iResolution', 'vec2 iResolution = viewportResolution;' );
+		this.addPolyfill( 'fragCoord', 'vec3 fragCoord = vec3( viewportCoordinate.x, viewportResolution.y - viewportCoordinate.y, viewportCoordinate.z );' );
+
+	}
+
+	parseFunction() {
+
+		const node = super.parseFunction();
+
+		if ( node.name === 'mainImage' ) {
+
+			node.params = []; // remove default parameters
+			node.type = 'vec4';
+			node.layout = false; // for now
+
+			const fragColor = new Accessor( 'fragColor' );
+
+			for ( const subNode of node.body ) {
+
+				if ( subNode.isReturn ) {
+
+					subNode.value = fragColor;
+
+				}
+
+			}
+
+			node.body.unshift( new VariableDeclaration( 'vec4', 'fragColor' ) );
+			node.body.push( new Return( fragColor ) );
+
+		}
+
+		return node;
+
+	}
+
+}
+
+export default ShaderToyDecoder;