/*
 * (C) 2003-2006 Gabest
 * (C) 2006-2013 see Authors.txt
 *
 * This file is part of MPC-HC.
 *
 * MPC-HC is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * MPC-HC is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

sampler s0 : register(s0);
float4 p0 :  register(c0);

#define width  (p0[0])
#define height (p0[1])
#define clock  (p0[3])

#define PI acos(-1)

float4 main(float2 tex : TEXCOORD0) : COLOR
{
	float4 c0 = tex2D(s0, tex);
	float3 lightsrc = float3(sin(clock * PI / 1.5) / 2 + 0.5, cos(clock * PI) / 2 + 0.5, 1);
	float3 light = normalize(lightsrc - float3(tex.x, tex.y, 0));
	c0 *= pow(dot(light, float3(0, 0, 1)), 50);

	return c0;
}