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clean fibonnacci

Benjamin Guignabert 5 år sedan
förälder
incheckning
725704f4dd
1 ändrade filer med 0 tillägg och 280 borttagningar
  1. 0 280
      src/Shaders/ShadersInclude/fibonacci.fx

+ 0 - 280
src/Shaders/ShadersInclude/fibonacci.fx

@@ -1,21 +1,7 @@
 #define rcp(x) 1. / x
-
-// Computes a point using the Fibonacci sequence of length N.
-// Input: Fib[N - 1], Fib[N - 2], and the index 'i' of the point.
-// Ref: Efficient Quadrature Rules for Illumination Integrals
-vec2 Fibonacci2dSeq(float fibN1, float fibN2, int i)
-{
-    // 3 cycles on GCN if 'fibN1' and 'fibN2' are known at compile time.
-    // N.b.: According to Swinbank and Pusser [SP06], the uniformity of the distribution
-    // can be slightly improved by introducing an offset of 1/N to the Z (or R) coordinates.
-    return vec2(float(i) / fibN1 + (0.5 / fibN1), fract(float(i) * (fibN2 / fibN1)));
-}
-
 #define GOLDEN_RATIO 1.618033988749895
-#define GOLDEN_ANGLE 2.399963229728653
 #define TWO_PI 6.2831855
 
-// Replaces the Fibonacci sequence in Fibonacci2dSeq() with the Golden ratio.
 vec2 Golden2dSeq(int i, float n)
 {
     // GoldenAngle = 2 * Pi * (1 - 1 / GoldenRatio).
@@ -23,274 +9,8 @@ vec2 Golden2dSeq(int i, float n)
     return vec2(float(i) / n + (0.5 / n), fract(float(i) * rcp(GOLDEN_RATIO)));
 }
 
-int k_FibonacciSeq[20] = int[20](
-    0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181
-);
-
-vec2 k_Fibonacci2dSeq21[21] = vec2[21](
-    vec2(0.02380952, 0.00000000),
-    vec2(0.07142857, 0.61904764),
-    vec2(0.11904762, 0.23809528),
-    vec2(0.16666667, 0.85714293),
-    vec2(0.21428572, 0.47619057),
-    vec2(0.26190478, 0.09523821),
-    vec2(0.30952382, 0.71428585),
-    vec2(0.35714287, 0.33333349),
-    vec2(0.40476191, 0.95238113),
-    vec2(0.45238096, 0.57142878),
-    vec2(0.50000000, 0.19047642),
-    vec2(0.54761904, 0.80952406),
-    vec2(0.59523809, 0.42857170),
-    vec2(0.64285713, 0.04761887),
-    vec2(0.69047618, 0.66666698),
-    vec2(0.73809522, 0.28571510),
-    vec2(0.78571427, 0.90476227),
-    vec2(0.83333331, 0.52380943),
-    vec2(0.88095236, 0.14285755),
-    vec2(0.92857140, 0.76190567),
-    vec2(0.97619045, 0.38095284)
-);
-
-vec2 k_Fibonacci2dSeq34[34] = vec2[34](
-    vec2(0.01470588, 0.00000000),
-    vec2(0.04411765, 0.61764705),
-    vec2(0.07352941, 0.23529410),
-    vec2(0.10294118, 0.85294116),
-    vec2(0.13235295, 0.47058821),
-    vec2(0.16176471, 0.08823538),
-    vec2(0.19117647, 0.70588231),
-    vec2(0.22058824, 0.32352924),
-    vec2(0.25000000, 0.94117641),
-    vec2(0.27941176, 0.55882359),
-    vec2(0.30882353, 0.17647076),
-    vec2(0.33823529, 0.79411745),
-    vec2(0.36764705, 0.41176462),
-    vec2(0.39705881, 0.02941132),
-    vec2(0.42647058, 0.64705849),
-    vec2(0.45588234, 0.26470566),
-    vec2(0.48529410, 0.88235283),
-    vec2(0.51470590, 0.50000000),
-    vec2(0.54411763, 0.11764717),
-    vec2(0.57352942, 0.73529434),
-    vec2(0.60294116, 0.35294151),
-    vec2(0.63235295, 0.97058773),
-    vec2(0.66176468, 0.58823490),
-    vec2(0.69117647, 0.20588207),
-    vec2(0.72058821, 0.82352924),
-    vec2(0.75000000, 0.44117641),
-    vec2(0.77941179, 0.05882263),
-    vec2(0.80882353, 0.67646980),
-    vec2(0.83823532, 0.29411697),
-    vec2(0.86764705, 0.91176414),
-    vec2(0.89705884, 0.52941132),
-    vec2(0.92647058, 0.14705849),
-    vec2(0.95588237, 0.76470566),
-    vec2(0.98529410, 0.38235283)
-);
-
-vec2 k_Fibonacci2dSeq55[55] = vec2[55](
-    vec2(0.00909091, 0.00000000),
-    vec2(0.02727273, 0.61818182),
-    vec2(0.04545455, 0.23636365),
-    vec2(0.06363636, 0.85454547),
-    vec2(0.08181818, 0.47272730),
-    vec2(0.10000000, 0.09090900),
-    vec2(0.11818182, 0.70909095),
-    vec2(0.13636364, 0.32727289),
-    vec2(0.15454546, 0.94545460),
-    vec2(0.17272727, 0.56363630),
-    vec2(0.19090909, 0.18181801),
-    vec2(0.20909090, 0.80000019),
-    vec2(0.22727273, 0.41818190),
-    vec2(0.24545455, 0.03636360),
-    vec2(0.26363635, 0.65454578),
-    vec2(0.28181818, 0.27272701),
-    vec2(0.30000001, 0.89090919),
-    vec2(0.31818181, 0.50909138),
-    vec2(0.33636364, 0.12727261),
-    vec2(0.35454544, 0.74545479),
-    vec2(0.37272727, 0.36363602),
-    vec2(0.39090911, 0.98181820),
-    vec2(0.40909091, 0.60000038),
-    vec2(0.42727274, 0.21818161),
-    vec2(0.44545454, 0.83636379),
-    vec2(0.46363637, 0.45454597),
-    vec2(0.48181817, 0.07272720),
-    vec2(0.50000000, 0.69090843),
-    vec2(0.51818180, 0.30909157),
-    vec2(0.53636366, 0.92727280),
-    vec2(0.55454546, 0.54545403),
-    vec2(0.57272726, 0.16363716),
-    vec2(0.59090906, 0.78181839),
-    vec2(0.60909092, 0.39999962),
-    vec2(0.62727273, 0.01818275),
-    vec2(0.64545453, 0.63636398),
-    vec2(0.66363639, 0.25454521),
-    vec2(0.68181819, 0.87272835),
-    vec2(0.69999999, 0.49090958),
-    vec2(0.71818179, 0.10909081),
-    vec2(0.73636365, 0.72727203),
-    vec2(0.75454545, 0.34545517),
-    vec2(0.77272725, 0.96363640),
-    vec2(0.79090911, 0.58181763),
-    vec2(0.80909091, 0.20000076),
-    vec2(0.82727271, 0.81818199),
-    vec2(0.84545457, 0.43636322),
-    vec2(0.86363637, 0.05454636),
-    vec2(0.88181818, 0.67272758),
-    vec2(0.89999998, 0.29090881),
-    vec2(0.91818184, 0.90909195),
-    vec2(0.93636364, 0.52727318),
-    vec2(0.95454544, 0.14545441),
-    vec2(0.97272730, 0.76363754),
-    vec2(0.99090910, 0.38181686)
-);
-
-vec2 k_Fibonacci2dSeq89[89] = vec2[89](
-    vec2(0.00561798, 0.00000000),
-    vec2(0.01685393, 0.61797750),
-    vec2(0.02808989, 0.23595500),
-    vec2(0.03932584, 0.85393250),
-    vec2(0.05056180, 0.47191000),
-    vec2(0.06179775, 0.08988762),
-    vec2(0.07303371, 0.70786500),
-    vec2(0.08426967, 0.32584238),
-    vec2(0.09550562, 0.94382000),
-    vec2(0.10674157, 0.56179762),
-    vec2(0.11797753, 0.17977524),
-    vec2(0.12921348, 0.79775238),
-    vec2(0.14044943, 0.41573000),
-    vec2(0.15168539, 0.03370762),
-    vec2(0.16292135, 0.65168476),
-    vec2(0.17415731, 0.26966286),
-    vec2(0.18539326, 0.88764000),
-    vec2(0.19662921, 0.50561714),
-    vec2(0.20786516, 0.12359524),
-    vec2(0.21910113, 0.74157238),
-    vec2(0.23033708, 0.35955048),
-    vec2(0.24157304, 0.97752762),
-    vec2(0.25280899, 0.59550476),
-    vec2(0.26404494, 0.21348286),
-    vec2(0.27528089, 0.83146000),
-    vec2(0.28651685, 0.44943714),
-    vec2(0.29775280, 0.06741524),
-    vec2(0.30898875, 0.68539238),
-    vec2(0.32022473, 0.30336952),
-    vec2(0.33146068, 0.92134666),
-    vec2(0.34269664, 0.53932571),
-    vec2(0.35393259, 0.15730286),
-    vec2(0.36516854, 0.77528000),
-    vec2(0.37640449, 0.39325714),
-    vec2(0.38764045, 0.01123428),
-    vec2(0.39887640, 0.62921333),
-    vec2(0.41011235, 0.24719048),
-    vec2(0.42134830, 0.86516762),
-    vec2(0.43258426, 0.48314476),
-    vec2(0.44382024, 0.10112190),
-    vec2(0.45505619, 0.71910095),
-    vec2(0.46629214, 0.33707809),
-    vec2(0.47752810, 0.95505524),
-    vec2(0.48876405, 0.57303238),
-    vec2(0.50000000, 0.19100952),
-    vec2(0.51123595, 0.80898666),
-    vec2(0.52247190, 0.42696571),
-    vec2(0.53370786, 0.04494286),
-    vec2(0.54494381, 0.66292000),
-    vec2(0.55617976, 0.28089714),
-    vec2(0.56741571, 0.89887428),
-    vec2(0.57865167, 0.51685333),
-    vec2(0.58988762, 0.13483047),
-    vec2(0.60112357, 0.75280762),
-    vec2(0.61235952, 0.37078476),
-    vec2(0.62359548, 0.98876190),
-    vec2(0.63483149, 0.60673904),
-    vec2(0.64606744, 0.22471619),
-    vec2(0.65730339, 0.84269333),
-    vec2(0.66853935, 0.46067429),
-    vec2(0.67977530, 0.07865143),
-    vec2(0.69101125, 0.69662857),
-    vec2(0.70224720, 0.31460571),
-    vec2(0.71348315, 0.93258286),
-    vec2(0.72471911, 0.55056000),
-    vec2(0.73595506, 0.16853714),
-    vec2(0.74719101, 0.78651428),
-    vec2(0.75842696, 0.40449142),
-    vec2(0.76966292, 0.02246857),
-    vec2(0.78089887, 0.64044571),
-    vec2(0.79213482, 0.25842667),
-    vec2(0.80337077, 0.87640381),
-    vec2(0.81460673, 0.49438095),
-    vec2(0.82584268, 0.11235809),
-    vec2(0.83707863, 0.73033524),
-    vec2(0.84831458, 0.34831238),
-    vec2(0.85955054, 0.96628952),
-    vec2(0.87078649, 0.58426666),
-    vec2(0.88202250, 0.20224380),
-    vec2(0.89325845, 0.82022095),
-    vec2(0.90449440, 0.43820190),
-    vec2(0.91573036, 0.05617905),
-    vec2(0.92696631, 0.67415619),
-    vec2(0.93820226, 0.29213333),
-    vec2(0.94943821, 0.91011047),
-    vec2(0.96067417, 0.52808762),
-    vec2(0.97191012, 0.14606476),
-    vec2(0.98314607, 0.76404190),
-    vec2(0.99438202, 0.38201904)
-);
-
-// Loads elements from one of the precomputed tables for sample counts of 21, 34, 55, and 89.
-// Computes sample positions at runtime otherwise.
-// Sample count must be a Fibonacci number (see 'k_FibonacciSeq').
-vec2 Fibonacci2d(int i, int sampleCount)
-{
-    switch (sampleCount)
-    {
-        case 21: return k_Fibonacci2dSeq21[i];
-        case 34: return k_Fibonacci2dSeq34[i];
-        case 55: return k_Fibonacci2dSeq55[i];
-        case 89: return k_Fibonacci2dSeq89[i];
-        default:
-        {
-            int fibN1 = sampleCount;
-            int fibN2 = sampleCount;
-
-            // These are all constants, so this loop will be optimized away.
-            for (int j = 1; j < 20; j++)
-            {
-                if (k_FibonacciSeq[j] == fibN1)
-                {
-                    fibN2 = k_FibonacciSeq[j - 1];
-                }
-            }
-
-            return Fibonacci2dSeq(float(fibN1), float(fibN2), i);
-        }
-    }
-}
-
 vec2 SampleDiskGolden(int i, int sampleCount)
 {
     vec2 f = Golden2dSeq(i, float(sampleCount));
     return vec2(sqrt(f.x), TWO_PI * f.y);
-}
-
-// Returns the radius as the X coordinate, and the angle as the Y coordinate.
-vec2 SampleDiskFibonacci(int i, int sampleCount)
-{
-    vec2 f = Fibonacci2d(i, sampleCount);
-    return vec2(sqrt(f.x), TWO_PI * f.y);
-}
-
-// Returns the zenith as the X coordinate, and the azimuthal angle as the Y coordinate.
-vec2 SampleHemisphereFibonacci(int i, int sampleCount)
-{
-    vec2 f = Fibonacci2d(i, sampleCount);
-    return vec2(1. - f.x, TWO_PI * f.y);
-}
-
-// Returns the zenith as the X coordinate, and the azimuthal angle as the Y coordinate.
-vec2 SampleSphereFibonacci(int i, int sampleCount)
-{
-    vec2 f = Fibonacci2d(i, sampleCount);
-    return vec2(1. - 2. * f.x, TWO_PI * f.y);
 }