Lucas de Vries
82 lines
2.1 KiB
Plaintext
82 lines
2.1 KiB
Plaintext
#define pi 3.141592653589793238462643383279
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const float gridWidth = 120.0;
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const float gridSize = 25000.0;
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const float gridFadeDist = 300000000.0;
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const float subGridWidth = 0.0;
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const float subGridSize = 50.0;
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const float subGridFadeDist = 0.0;
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const float subsubGridWidth = 0.0;
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const float subsubGridSize = 50.0;
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const float subsubGridFadeDist = 0.0;
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uniform float radius;
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uniform float planeDist;
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varying vec2 uv;
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varying vec2 rcoords;
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vec4 grid(float distance, float bordMult) {
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if(distance >= 1.0)
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return vec4(0, 0, 0, 0);
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vec4 res;
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res.rgb = gl_Color.rgb;
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float baseAlpha = smoothstep(100.0, 200.0, planeDist) * 0.08;
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vec2 absCoords = rcoords * radius;
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vec2 gridPos = abs(mod(absCoords, gridSize));
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gridPos = min(gridPos, gridSize - gridPos);
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// Main grid alpha
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if(planeDist < gridFadeDist) {
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if(gridPos.x <= gridWidth * bordMult || gridPos.y <= gridWidth * bordMult) {
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res.a = baseAlpha * 2.0;
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return res;
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}
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if(planeDist < subGridFadeDist) {
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vec2 subGridPos = abs(mod(absCoords, subGridSize));
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subGridPos = min(subGridPos, subGridSize - subGridPos);
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if(subGridPos.x <= subGridWidth * bordMult || subGridPos.y <= subGridWidth * bordMult) {
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res.a = baseAlpha * 1.8;
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return res;
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}
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if(planeDist < subsubGridFadeDist) {
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vec2 subsubGridPos = abs(mod(absCoords, subsubGridSize));
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subsubGridPos = min(subsubGridPos, subsubGridSize - subsubGridPos);
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if(subsubGridPos.x <= subsubGridWidth * bordMult || subsubGridPos.y <= subsubGridWidth * bordMult) {
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res.a = baseAlpha * 1.5;
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return res;
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}
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}
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}
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}
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res.a = 0.0;
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return res;
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}
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void main() {
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float distance = length(rcoords);
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float bordMult = 1.0;
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if(distance > 0.9)
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discard;
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vec4 color;
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if(uv.x > 0.5 && abs(uv.y - 0.5) < 0.002)
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color = vec4(1.0, 0.0, 0.0, 1.0);
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else
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color = grid(distance, bordMult);
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color.a *= clamp((planeDist - 32000.0) / 60000.0, 0.0, 1.0);
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color.a *= clamp(1.0 - (planeDist - 300000.0) / 60000.0, 0.0, 1.0);
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if (color.a == 0.0)
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discard;
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gl_FragColor = color;
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}
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