File: negative.x3dv

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#X3D V4.0 utf8
PROFILE Interchange

# Negate RGB screen effect.
#
# See https://castle-engine.io/x3d_extensions_screen_effects.php
# for docs how to write screen effects for CGE.

ScreenEffect {
  shaders ComposedShader {
    language "GLSL"
    parts ShaderPart {
      type "FRAGMENT"
      url "data:text/plain,
        void main (void)
        {
          vec4 color = screenf_get_original_color();
          gl_FragColor = vec4(vec3(1.0) - color.rgb, color.a);
        }
        "
    }
  }
}