diff options
Diffstat (limited to 'intern/cycles/kernel/osl/nodes/node_texture.h')
| -rw-r--r-- | intern/cycles/kernel/osl/nodes/node_texture.h | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/nodes/node_texture.h b/intern/cycles/kernel/osl/nodes/node_texture.h new file mode 100644 index 00000000000..8adb0e8aeb5 --- /dev/null +++ b/intern/cycles/kernel/osl/nodes/node_texture.h @@ -0,0 +1,251 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +/* Voronoi Distances */ + +float voronoi_distance(string distance_metric, vector d, float e) +{ + float result = 0.0; + + if(distance_metric == "Distance Squared") + result = dot(d, d); + if(distance_metric == "Actual Distance") + result = length(d); + if(distance_metric == "Manhattan") + result = fabs(d[0]) + fabs(d[1]) + fabs(d[2]); + if(distance_metric == "Chebychev") + result = max(fabs(d[0]), max(fabs(d[1]), fabs(d[2]))); + if(distance_metric == "Minkovsky 1/2") + result = sqrt(fabs(d[0])) + sqrt(fabs(d[1])) + sqrt(fabs(d[1])); + if(distance_metric == "Minkovsky 4") + result = sqrt(sqrt(dot(d*d, d*d))); + if(distance_metric == "Minkovsky") + result = pow(pow(fabs(d[0]), e) + pow(fabs(d[1]), e) + pow(fabs(d[2]), e), 1.0/e); + + return result; +} + +/* Voronoi / Worley like */ + +color cellnoise_color(point p) +{ + float r = cellnoise(p); + float g = cellnoise(point(p[1], p[0], p[2])); + float b = cellnoise(point(p[1], p[2], p[0])); + + return color(r, g, b); +} + +void voronoi(point p, string distance_metric, float e, float da[4], point pa[4]) +{ + /* returns distances in da and point coords in pa */ + int xx, yy, zz, xi, yi, zi; + + xi = (int)floor(p[0]); + yi = (int)floor(p[1]); + zi = (int)floor(p[2]); + + da[0] = 1e10; + da[1] = 1e10; + da[2] = 1e10; + da[3] = 1e10; + + for(xx = xi-1; xx <= xi+1; xx++) { + for(yy = yi-1; yy <= yi+1; yy++) { + for(zz = zi-1; zz <= zi+1; zz++) { + point ip = point(xx, yy, zz); + point vp = (point)cellnoise_color(ip); + point pd = p - (vp + ip); + float d = voronoi_distance(distance_metric, pd, e); + + vp += point(xx, yy, zz); + + if(d < da[0]) { + da[3] = da[2]; + da[2] = da[1]; + da[1] = da[0]; + da[0] = d; + + pa[3] = pa[2]; + pa[2] = pa[1]; + pa[1] = pa[0]; + pa[0] = vp; + } + else if(d < da[1]) { + da[3] = da[2]; + da[2] = da[1]; + da[1] = d; + + pa[3] = pa[2]; + pa[2] = pa[1]; + pa[1] = vp; + } + else if(d < da[2]) { + da[3] = da[2]; + da[2] = d; + + pa[3] = pa[2]; + pa[2] = vp; + } + else if(d < da[3]) { + da[3] = d; + pa[3] = vp; + } + } + } + } +} + +float voronoi_Fn(point p, int n) +{ + float da[4]; + point pa[4]; + + voronoi(p, "Distance Squared", 0, da, pa); + + return da[n]; +} + +float voronoi_FnFn(point p, int n1, int n2) +{ + float da[4]; + point pa[4]; + + voronoi(p, "Distance Squared", 0, da, pa); + + return da[n2] - da[n1]; +} + +float voronoi_F1(point p) { return voronoi_Fn(p, 0); } +float voronoi_F2(point p) { return voronoi_Fn(p, 1); } +float voronoi_F3(point p) { return voronoi_Fn(p, 2); } +float voronoi_F4(point p) { return voronoi_Fn(p, 3); } +float voronoi_F1F2(point p) { return voronoi_FnFn(p, 0, 1); } + +float voronoi_Cr(point p) +{ + /* crackle type pattern, just a scale/clamp of F2-F1 */ + float t = 10.0*voronoi_F1F2(p); + return (t > 1.0)? 1.0: t; +} + +float voronoi_F1S(point p) { return 2.0*voronoi_F1(p) - 1.0; } +float voronoi_F2S(point p) { return 2.0*voronoi_F2(p) - 1.0; } +float voronoi_F3S(point p) { return 2.0*voronoi_F3(p) - 1.0; } +float voronoi_F4S(point p) { return 2.0*voronoi_F4(p) - 1.0; } +float voronoi_F1F2S(point p) { return 2.0*voronoi_F1F2(p) - 1.0; } +float voronoi_CrS(point p) { return 2.0*voronoi_Cr(p) - 1.0; } + +/* Noise Bases */ + +float noise_basis(point p, string basis) +{ + float result = 0.0; + + if(basis == "Perlin") + result = noise(p); + if(basis == "Voronoi F1") + result = voronoi_F1S(p); + if(basis == "Voronoi F2") + result = voronoi_F2S(p); + if(basis == "Voronoi F3") + result = voronoi_F3S(p); + if(basis == "Voronoi F4") + result = voronoi_F4S(p); + if(basis == "Voronoi F2-F1") + result = voronoi_F1F2S(p); + if(basis == "Voronoi Crackle") + result = voronoi_CrS(p); + if(basis == "Cell Noise") + result = cellnoise(p); + + return result; +} + +/* Soft/Hard Noise */ + +float noise_basis_hard(point p, string basis, int hard) +{ + float t = noise_basis(p, basis); + return (hard)? fabs(2.0*t - 1.0): t; +} + +/* Waves */ + +float noise_wave(string wave, float a) +{ + float result = 0.0; + + if(wave == "Sine") { + result = 0.5 + 0.5*sin(a); + } + else if(wave == "Saw") { + float b = 2*M_PI; + int n = (int)(a / b); + a -= n*b; + if(a < 0) a += b; + + result = a / b; + } + else if(wave == "Tri") { + float b = 2*M_PI; + float rmax = 1.0; + + result = rmax - 2.0*fabs(floor((a*(1.0/b))+0.5) - (a*(1.0/b))); + } + + return result; +} + +/* Turbulence */ + +float noise_turbulence(point p, string basis, int octaves, int hard) +{ + float fscale = 1.0; + float amp = 1.0; + float sum = 0.0; + int i; + + for(i = 0; i <= octaves; i++) { + float t = noise_basis(fscale*p, basis); + + if(hard) + t = fabs(2.0*t - 1.0); + + sum += t*amp; + amp *= 0.5; + fscale *= 2.0; + } + + sum *= ((float)(1 << octaves)/(float)((1 << (octaves+1)) - 1)); + + return sum; +} + +/* Utility */ + +float nonzero(float f, float eps) +{ + float r; + + if(abs(f) < eps) + r = sign(f)*eps; + else + r = f; + + return r; +} + |