in vec3 coord3d;
uniform mat4 mvp;
uniform float wind;
out vec4 fcolor;

void main(void) {
	vec4 i = mvp * vec4(coord3d, 1.0);
	if(i.y > -2){
		i.x += (i.y+2)/5.0 * wind;
	}
	gl_Position = i;
	float height = coord3d.y + 2;
	float r = 10.0f + (-height / 0.17);
	if(r > 1.0f)
		r = 1.0f;
	fcolor = vec4(r, .6, .2, 1);
}