/*
 * This file is part of BlueMap, licensed under the MIT License (MIT).
 *
 * Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
 * Copyright (c) contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the 'Software'), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
import { ShaderChunk } from 'three';

export const HIRES_FRAGMENT_SHADER = `
${ShaderChunk.logdepthbuf_pars_fragment}

#ifndef texture
	#define texture texture2D
#endif

uniform sampler2D textureImage;
uniform float sunlightStrength;
uniform float ambientLight;
uniform float animationFrameHeight;
uniform float animationFrameIndex;
uniform float animationInterpolationFrameIndex;
uniform float animationInterpolation;

varying vec3 vPosition;
//varying vec3 vWorldPosition;
varying vec3 vNormal;
varying vec2 vUv;
varying vec3 vColor;
varying float vAo;
varying float vSunlight;
varying float vBlocklight;
//varying float vDistance;

void main() {

	vec4 color = texture(textureImage, vec2(vUv.x, animationFrameHeight * (vUv.y + animationFrameIndex)));
	if (animationInterpolation > 0.0) {
		color = mix(color, texture(textureImage, vec2(vUv.x, animationFrameHeight * (vUv.y + animationInterpolationFrameIndex))), animationInterpolation);
	}
	
	if (color.a <= 0.01) discard;
	
	//apply vertex-color
	color.rgb *= vColor.rgb;

	//apply ao
	color.rgb *= vAo;
	
	//apply light
	float light = mix(vBlocklight, max(vSunlight, vBlocklight), sunlightStrength);
	color.rgb *= mix(ambientLight, 1.0, light / 15.0);
	
	gl_FragColor = color;
	
	${ShaderChunk.logdepthbuf_fragment}
}
`;