first commit

framework/Mesh.js

@@ -0,0 +1,59 @@
+export class Mesh {
+
+	constructor( ) {
+
+		this.shaders		= [];
+
+		this.instanceCount	= 1;
+
+	}
+
+
+	addShader( shader, options = { } ) {
+
+		this.shaders.push( {
+			shader,
+			options
+		} );
+
+		return this;
+
+	}
+
+
+	setInstanceCount( count ) {
+
+		this.instanceCount	= count;
+
+		return this;
+
+	}
+
+
+	draw( passEncoder ) {
+
+		for ( const entry of this.shaders ) {
+
+			const shader	= entry.shader;
+
+			const opts		= entry.options || { };
+
+			const instances	= opts.instances != null ? opts.instances : this.instanceCount;
+
+			// When no explicit vertex count is provided, rely on the shader's indexCount
+			const vertexCount = opts.vertexCount != null ? opts.vertexCount : ( shader.indexCount || 0 );
+
+			if ( vertexCount <= 0 ) {
+
+				continue;
+
+			}
+
+			shader.encodeRender( passEncoder, vertexCount, instances );
+
+		}
+
+	}
+
+}
+