three.js/examples/js/shaders/BasicShader.js

/**
 * Simple test shader
 */

THREE.BasicShader = {

	uniforms: {},

	vertexShader: [

		"void main() {",

		"	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",

		"}"

	].join( "\n" ),

	fragmentShader: [

		"void main() {",

		"	gl_FragColor = vec4( 1.0, 0.0, 0.0, 0.5 );",

		"}"

	].join( "\n" )

};