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/*
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
*/
/* The following files are direct copies of each other:
*
* GL/acos/acos_float_frag_xvary_ref.frag
* GL/asin/asin_float_frag_xvary_ref.frag
*
* Care should be taken to apply any changes to both. Only the last
* line where gl_FragColor is assigned should be different.
*/
#ifdef GL_ES
precision mediump float;
#endif
varying vec4 color;
float lerp(float a, float b, float s)
{
return a + (b - a) * s;
}
void main (void)
{
float asinValues[17];
asinValues[0] = -1.5708;
asinValues[1] = -1.06544;
asinValues[2] = -0.848062;
asinValues[3] = -0.675132;
asinValues[4] = -0.523599;
asinValues[5] = -0.384397;
asinValues[6] = -0.25268;
asinValues[7] = -0.125328;
asinValues[8] = 0.0;
asinValues[9] = 0.125328;
asinValues[10] = 0.25268;
asinValues[11] = 0.384397;
asinValues[12] = 0.523599;
asinValues[13] = 0.675132;
asinValues[14] = 0.848062;
asinValues[15] = 1.06544;
asinValues[16] = 1.5708;
const float M_PI = 3.14159265358979323846;
float c = 2.0 * (color.r - 0.5);
float arrVal = (c + 1.0) * 8.0;
int arr0 = int(floor(arrVal));
float weight = arrVal - floor(arrVal);
float asin_c = 0.0;
if (arr0 == 0)
asin_c = lerp(asinValues[0], asinValues[1], weight);
else if (arr0 == 1)
asin_c = lerp(asinValues[1], asinValues[2], weight);
else if (arr0 == 2)
asin_c = lerp(asinValues[2], asinValues[3], weight);
else if (arr0 == 3)
asin_c = lerp(asinValues[3], asinValues[4], weight);
else if (arr0 == 4)
asin_c = lerp(asinValues[4], asinValues[5], weight);
else if (arr0 == 5)
asin_c = lerp(asinValues[5], asinValues[6], weight);
else if (arr0 == 6)
asin_c = lerp(asinValues[6], asinValues[7], weight);
else if (arr0 == 7)
asin_c = lerp(asinValues[7], asinValues[8], weight);
else if (arr0 == 8)
asin_c = lerp(asinValues[8], asinValues[9], weight);
else if (arr0 == 9)
asin_c = lerp(asinValues[9], asinValues[10], weight);
else if (arr0 == 10)
asin_c = lerp(asinValues[10], asinValues[11], weight);
else if (arr0 == 11)
asin_c = lerp(asinValues[11], asinValues[12], weight);
else if (arr0 == 12)
asin_c = lerp(asinValues[12], asinValues[13], weight);
else if (arr0 == 13)
asin_c = lerp(asinValues[13], asinValues[14], weight);
else if (arr0 == 14)
asin_c = lerp(asinValues[14], asinValues[15], weight);
else if (arr0 == 15)
asin_c = lerp(asinValues[15], asinValues[16], weight);
else if (arr0 == 16)
asin_c = asinValues[16];
gl_FragColor = vec4(asin_c / M_PI + 0.5, 0.0, 0.0, 1.0);
}
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