/*
 * Minosoft
 * Copyright (C) 2020 Moritz Zwerger
 *
 * This program 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.
 *
 * This program 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 <https://www.gnu.org/licenses/>.
 *
 * This software is not affiliated with Mojang AB, the original developer of Minecraft.
 */

#version 330 core

out vec4 foutColor;

flat in uint finTextureIndex1;
in vec3 finTextureCoordinates1;
flat in uint finTextureIndex2;
in vec3 finTextureCoordinates2;
flat in float finInterpolation;

in vec4 finTintColor;

#include "minosoft:texture"

void main() {
    vec4 texelColor1 = getTexture(finTextureIndex1, finTextureCoordinates1);
    if (texelColor1.a == 0.0f) {
        discard;
    }

    if (finInterpolation == 0.0f) {
        foutColor = texelColor1 * finTintColor;
        #ifdef TRANSPARENT
        if (foutColor.a < 0.3f){
            discard;
        }
            #endif
        return;
    }

    vec4 texelColor2 = getTexture(finTextureIndex2, finTextureCoordinates2);

    if (texelColor2.a == 0.0f) {
        discard;
    }

    foutColor = mix(texelColor1, texelColor2, finInterpolation) * finTintColor;


    #ifdef TRANSPARENT
    if (foutColor.a < 0.3f){
        discard;
    }
        #endif
}
