OpenSpace/modules/digitaluniverse/shaders/plane_fs.glsl

/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2020                                                               *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
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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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#include "fragment.glsl"

in float vs_screenSpaceDepth;
in vec2 vs_st;

uniform sampler2D galaxyTexture;
//uniform bool additiveBlending;
uniform float alphaValue;
uniform float fadeInValue;


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

    frag.color = texture(galaxyTexture, vs_st);
    frag.color *= alphaValue;

    frag.color *= fadeInValue;

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

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

    //frag.color = texture(galaxyTexture, vs_st);
    frag.depth      = vs_screenSpaceDepth;
    frag.gPosition  = vec4(vs_screenSpaceDepth, vs_screenSpaceDepth, vs_screenSpaceDepth, 1.0);
    frag.gNormal    = vec4(0.0, 0.0, 0.0, 1.0);

    return frag;
}