33 lines
710 B
GLSL
33 lines
710 B
GLSL
#version 300 es
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precision mediump float;
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in vec2 fragTexCoord;
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in vec4 fragColor;
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out vec4 finalColor;
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uniform vec3 color;
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vec2 offset = vec2(1.0, 1.0);
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float start_transparency = 0.40f;
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float sun_radius = 0.6f;
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float sun_end = 1.0f;
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void main()
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{
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offset.x -= fragTexCoord.x * 2.0;
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offset.y -= fragTexCoord.y * 2.0;
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float radius = length(offset);
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if(radius < sun_radius){
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finalColor = vec4(color, 1.0);
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}else if(radius < sun_end){
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float gradient = radius;
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gradient -= sun_radius;
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gradient = gradient / 0.4f * start_transparency;
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finalColor = vec4(color, start_transparency - gradient);
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}else{
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finalColor = vec4(color, 0.0);
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}
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}
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