gistfile1.js

uniform float amplitude;

attribute float displacement;

varying vec3 vNormal;
varying vec2 vUv;

void main() {

 vNormal = normal;
 vUv = ( 0.5 + amplitude ) * uv + vec2( amplitude );

 vec3 newPosition = position + amplitude * normal * vec3( displacement );
 gl_Position = projectionMatrix * modelViewMatrix * vec4( newPosition, 1.0 );

}