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perlin.gdshader
245 lines (220 loc) · 12.7 KB
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perlin.gdshader
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shader_type spatial;
const int X_NOISE_GEN = 1619;
const int Y_NOISE_GEN = 31337;
const int Z_NOISE_GEN = 6971;
const int SEED_NOISE_GEN = 1013;
const int SHIFT_NOISE_GEN = 8;
const float vector[] = {
-0.763874, -0.596439, -0.246489, 0.0, 0.396055, 0.904518, -0.158073, 0.0,
-0.499004, -0.8665, -0.0131631, 0.0, 0.468724, -0.824756, 0.316346, 0.0,
0.829598, 0.43195, 0.353816, 0.0, -0.454473, 0.629497, -0.630228, 0.0,
-0.162349, -0.869962, -0.465628, 0.0, 0.932805, 0.253451, 0.256198, 0.0,
-0.345419, 0.927299, -0.144227, 0.0, -0.715026, -0.293698, -0.634413, 0.0,
-0.245997, 0.717467, -0.651711, 0.0, -0.967409, -0.250435, -0.037451, 0.0,
0.901729, 0.397108, -0.170852, 0.0, 0.892657, -0.0720622, -0.444938, 0.0,
0.0260084, -0.0361701, 0.999007, 0.0, 0.949107, -0.19486, 0.247439, 0.0,
0.471803, -0.807064, -0.355036, 0.0, 0.879737, 0.141845, 0.453809, 0.0,
0.570747, 0.696415, 0.435033, 0.0, -0.141751, -0.988233, -0.0574584, 0.0,
-0.58219, -0.0303005, 0.812488, 0.0, -0.60922, 0.239482, -0.755975, 0.0,
0.299394, -0.197066, -0.933557, 0.0, -0.851615, -0.220702, -0.47544, 0.0,
0.848886, 0.341829, -0.403169, 0.0, -0.156129, -0.687241, 0.709453, 0.0,
-0.665651, 0.626724, 0.405124, 0.0, 0.595914, -0.674582, 0.43569, 0.0,
0.171025, -0.509292, 0.843428, 0.0, 0.78605, 0.536414, -0.307222, 0.0,
0.18905, -0.791613, 0.581042, 0.0, -0.294916, 0.844994, 0.446105, 0.0,
0.342031, -0.58736, -0.7335, 0.0, 0.57155, 0.7869, 0.232635, 0.0,
0.885026, -0.408223, 0.223791, 0.0, -0.789518, 0.571645, 0.223347, 0.0,
0.774571, 0.31566, 0.548087, 0.0, -0.79695, -0.0433603, -0.602487, 0.0,
-0.142425, -0.473249, -0.869339, 0.0, -0.0698838, 0.170442, 0.982886, 0.0,
0.687815, -0.484748, 0.540306, 0.0, 0.543703, -0.534446, -0.647112, 0.0,
0.97186, 0.184391, -0.146588, 0.0, 0.707084, 0.485713, -0.513921, 0.0,
0.942302, 0.331945, 0.043348, 0.0, 0.499084, 0.599922, 0.625307, 0.0,
-0.289203, 0.211107, 0.9337, 0.0, 0.412433, -0.71667, -0.56239, 0.0,
0.87721, -0.082816, 0.47291, 0.0, -0.420685, -0.214278, 0.881538, 0.0,
0.752558, -0.0391579, 0.657361, 0.0, 0.0765725, -0.996789, 0.0234082, 0.0,
-0.544312, -0.309435, -0.779727, 0.0, -0.455358, -0.415572, 0.787368, 0.0,
-0.874586, 0.483746, 0.0330131, 0.0, 0.245172, -0.0838623, 0.965846, 0.0,
0.382293, -0.432813, 0.81641, 0.0, -0.287735, -0.905514, 0.311853, 0.0,
-0.667704, 0.704955, -0.239186, 0.0, 0.717885, -0.464002, -0.518983, 0.0,
0.976342, -0.214895, 0.0240053, 0.0, -0.0733096, -0.921136, 0.382276, 0.0,
-0.986284, 0.151224, -0.0661379, 0.0, -0.899319, -0.429671, 0.0812908, 0.0,
0.652102, -0.724625, 0.222893, 0.0, 0.203761, 0.458023, -0.865272, 0.0,
-0.030396, 0.698724, -0.714745, 0.0, -0.460232, 0.839138, 0.289887, 0.0,
-0.0898602, 0.837894, 0.538386, 0.0, -0.731595, 0.0793784, 0.677102, 0.0,
-0.447236, -0.788397, 0.422386, 0.0, 0.186481, 0.645855, -0.740335, 0.0,
-0.259006, 0.935463, 0.240467, 0.0, 0.445839, 0.819655, -0.359712, 0.0,
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-0.228559, -0.228965, -0.946222, 0.0, -0.10194, -0.65706, -0.746914, 0.0,
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-0.742141, 0.547083, -0.387203, 0.0, -0.00210603, -0.796417, -0.604745, 0.0,
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-0.641628, 0.742379, 0.192838, 0.0, -0.186009, -0.101514, 0.97729, 0.0,
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0.945561, -0.192859, -0.262146, 0.0, 0.844504, 0.520193, 0.127325, 0.0,
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0.274465, 0.887659, 0.369772, 0.0, -0.123419, 0.975177, -0.183842, 0.0,
-0.223429, 0.708045, 0.66989, 0.0, -0.908654, 0.196302, 0.368528, 0.0,
-0.95759, -0.00863708, 0.288005, 0.0, 0.960535, 0.030592, 0.276472, 0.0,
-0.413146, 0.907537, 0.0754161, 0.0, -0.847992, 0.350849, -0.397259, 0.0,
0.614736, 0.395841, 0.68221, 0.0, -0.503504, -0.666128, -0.550234, 0.0,
-0.268833, -0.738524, -0.618314, 0.0, 0.792737, -0.60001, -0.107502, 0.0,
-0.637582, 0.508144, -0.579032, 0.0, 0.750105, 0.282165, -0.598101, 0.0,
-0.351199, -0.392294, -0.850155, 0.0, 0.250126, -0.960993, -0.118025, 0.0,
-0.732341, 0.680909, -0.0063274, 0.0, -0.760674, -0.141009, 0.633634, 0.0,
0.222823, -0.304012, 0.926243, 0.0, 0.209178, 0.505671, 0.836984, 0.0,
0.757914, -0.56629, -0.323857, 0.0, -0.782926, -0.339196, 0.52151, 0.0,
-0.462952, 0.585565, 0.665424, 0.0, 0.61879, 0.194119, -0.761194, 0.0,
0.741388, -0.276743, 0.611357, 0.0, 0.707571, 0.702621, 0.0752872, 0.0,
0.156562, 0.819977, 0.550569, 0.0, -0.793606, 0.440216, 0.42, 0.0,
0.234547, 0.885309, -0.401517, 0.0, 0.132598, 0.80115, -0.58359, 0.0,
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-0.0157698, -0.307475, -0.951425, 0.0, -0.603467, -0.250192, 0.757121, 0.0,
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0.466764, -0.874228, -0.133625, 0.0, 0.475077, -0.0682351, -0.877295, 0.0,
-0.224967, -0.938972, -0.260233, 0.0, -0.377929, -0.814757, -0.439705, 0.0,
-0.305847, 0.542333, -0.782517, 0.0, 0.26658, -0.902905, -0.337191, 0.0,
0.0275773, 0.322158, -0.946284, 0.0, 0.0185422, 0.716349, 0.697496, 0.0,
-0.20483, 0.978416, 0.0273371, 0.0, -0.898276, 0.373969, 0.230752, 0.0,
-0.00909378, 0.546594, 0.837349, 0.0, 0.6602, -0.751089, 0.000959236, 0.0,
0.855301, -0.303056, 0.420259, 0.0, 0.797138, 0.0623013, -0.600574, 0.0,
0.48947, -0.866813, 0.0951509, 0.0, 0.251142, 0.674531, 0.694216, 0.0,
-0.578422, -0.737373, -0.348867, 0.0, -0.254689, -0.514807, 0.818601, 0.0,
0.374972, 0.761612, 0.528529, 0.0, 0.640303, -0.734271, -0.225517, 0.0,
-0.638076, 0.285527, 0.715075, 0.0, 0.772956, -0.15984, -0.613995, 0.0,
0.798217, -0.590628, 0.118356, 0.0, -0.986276, -0.0578337, -0.154644, 0.0,
-0.312988, -0.94549, 0.0899272, 0.0, -0.497338, 0.178325, 0.849032, 0.0,
-0.101136, -0.981014, 0.165477, 0.0, -0.521688, 0.0553434, -0.851339, 0.0,
-0.786182, -0.583814, 0.202678, 0.0, -0.565191, 0.821858, -0.0714658, 0.0,
0.437895, 0.152598, -0.885981, 0.0, -0.92394, 0.353436, -0.14635, 0.0,
0.212189, -0.815162, -0.538969, 0.0, -0.859262, 0.143405, -0.491024, 0.0,
0.991353, 0.112814, 0.0670273, 0.0, 0.0337884, -0.979891, -0.196654, 0.0
};
float gradient_noise_3d(float fx, float fy, float fz, int ix, int iy, int iz, int seed) {
int vectorIndex = ((X_NOISE_GEN * ix) +
(Y_NOISE_GEN * iy) +
(Z_NOISE_GEN * iz) +
(SEED_NOISE_GEN * seed));
vectorIndex &= 0xffffffff;
vectorIndex = vectorIndex ^ (vectorIndex >> 8);
vectorIndex = vectorIndex & 0xff;
float xv = vector[vectorIndex << 2];
float yv = vector[(vectorIndex << 2) + 1];
float zv = vector[(vectorIndex << 2) + 2];
float xvp = fx - float(ix);
float yvp = fy - float(iy);
float zvp = fz - float(iz);
return ((xv * xvp) + (yv * yvp) + (zv * zvp)) * 2.12;
}
float scurve3(float a) {
return (a * a * (3.0-2.0*a));
}
float scurve5(float a) {
return (6.0 * pow(a, 5)) - (15.0 * pow(a, 4)) + (10.0 * pow(a, 3));
}
float gradient_coherent_noise_3d(float x, float y, float z, int seed, int quality) {
int x0 = int(floor(x));
if (x0 <= 0) {
x0--;
}
int y0 = int(floor(y));
if (y0 <= 0) {
y0--;
}
int z0 = int(floor(z));
if (z0 <= 0) {
z0--;
}
int x1 = x0 + 1;
int y1 = y0 + 1;
int z1 = z0 + 1;
float xs = 0.0;
float ys = 0.0;
float zs = 0.0;
if (quality == 1) {
xs = x-float(x0);
ys = y-float(y0);
zs = z-float(z0);
} else if (quality == 2) {
xs = scurve3(x-float(x0));
ys = scurve3(y-float(y0));
zs = scurve3(z-float(z0));
} else {
xs = scurve5(x-float(x0));
ys = scurve5(y-float(y0));
zs = scurve5(z-float(z0));
}
float n0 = gradient_noise_3d(x, y, z, x0, y0, z0, seed);
float n1 = gradient_noise_3d(x, y, z, x1, y0, z0, seed);
float ix0 = mix(n0, n1, xs);
n0 = gradient_noise_3d(x, y, z, x0, y1, z0, seed);
n1 = gradient_noise_3d(x, y, z, x1, y1, z0, seed);
float ix1 = mix(n0, n1, xs);
float iy0 = mix(ix0, ix1, ys);
n0 = gradient_noise_3d(x, y, z, x0, y0, z1, seed);
n1 = gradient_noise_3d(x, y, z, x1, y0, z1, seed);
ix0 = mix(n0, n1, xs);
n0 = gradient_noise_3d(x, y, z, x0, y1, z1, seed);
n1 = gradient_noise_3d(x, y, z, x1, y1, z1, seed);
ix1 = mix(n0, n1, xs);
float iy1 = mix(ix0, ix1, ys);
return mix(iy0, iy1, zs);
}
void vertex() {
// Called for every vertex the material is visible on.
}
instance uniform float xm: hint_range(0.0, 2.0, 0.1);
instance uniform float ym: hint_range(0.0, 2.0, 0.1);
instance uniform float zm: hint_range(0.0, 2.0, 0.01);
void fragment() {
float r = gradient_coherent_noise_3d(xm, ym, zm, 0, 2);
ALBEDO = vec3(r,r,r);
}
//void light() {
// Called for every pixel for every light affecting the material.
// Uncomment to replace the default light processing function with this one.
//}