OpenSpace/modules/base/shaders/plane_fs_yt.glsl

/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2024                                                               *
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#include "fragment.glsl"

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

uniform sampler2D colorTexture;
uniform float opacity = 1.0;
uniform bool mirrorBackside = true;
uniform vec3 multiplyColor;

uniform sampler2D depthTexture;

Fragment getFragment() {
  Fragment frag;
  if (gl_FrontFacing) {
    frag.color = texture(colorTexture, vs_st);
  }
  else {
    if (mirrorBackside) {
      frag.color = texture(colorTexture, vec2(1.0 - vs_st.s, vs_st.t));
    }
    else {
      frag.color = texture(colorTexture, vs_st);
    }
  }

  frag.color.rgb *= multiplyColor;

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

  frag.depth = texture(depthTexture, vs_st).r;
  if (frag.depth == vs_screenSpaceDepth) {
    discard;
  }
  
  frag.depth = vs_screenSpaceDepth;

  //frag.color += texture(depthTexture, vs_st);

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

  return frag;
}