OpenSpace/modules/base/shaders/plane_fs.glsl

/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2021                                                               *
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 * 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 *
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 * permit persons to whom the Software is furnished to do so, subject to the following   *
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 * or substantial portions of the Software.                                              *
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 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
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 ****************************************************************************************/

#include "fragment.glsl"

in float vs_screenSpaceDepth;
in vec2 vs_st;
in vec4 vs_gPosition;
in vec3 vs_gNormal;

uniform sampler2D texture1;
uniform bool additiveBlending;
uniform float opacity = 1.0;
uniform vec3 multiplyColor;

Fragment getFragment() {
    Fragment frag;
    if (gl_FrontFacing) {
        frag.color = texture(texture1, vs_st);
    }
    else {
        frag.color = texture(texture1, vec2(1 - vs_st.s, vs_st.t));
    }

    frag.color.rgb *= multiplyColor;

    frag.color.a *= opacity;
    if (frag.color.a == 0.0) {
        discard;
    }

    frag.depth = vs_screenSpaceDepth;

    if (additiveBlending) {
        frag.blend = BLEND_MODE_ADDITIVE;
    }

    // G-Buffer
    frag.gPosition  = vs_gPosition;
    frag.gNormal    = vec4(vs_gNormal, 1.0);

    return frag;
}