varying vec3 normal, lDir;

void main()
{
	vec4 vertex = vec4(gl_Vertex);

	normal = normalize(gl_NormalMatrix * gl_Normal);
	lDir = vec3(gl_LightSource[0].position.xyz - vertex);

	vertex += vec4(normal * sin(vertex.x), 0);
	vertex += vec4(normal * sin(vertex.y), 0);

	gl_TexCoord[0] = gl_MultiTexCoord0;
	gl_Position = gl_ModelViewProjectionMatrix * vertex;
}