Differential D1463 Diff 4888 intern/cycles/kernel/shaders/node_voronoi_crackle_texture.osl

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intern/cycles/kernel/shaders/node_voronoi_crackle_texture.osl

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				/*
				* Copyright 2011-2013 Blender Foundation
				*
				* Licensed under the Apache License, Version 2.0 (the "License");
				* you may not use this file except in compliance with the License.
				* You may obtain a copy of the License at
				*
				* http://www.apache.org/licenses/LICENSE-2.0
				*
				* Unless required by applicable law or agreed to in writing, software
				* distributed under the License is distributed on an "AS IS" BASIS,
				* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
				* See the License for the specific language governing permissions and
				* limitations under the License.
				*/

				#include "stdosl.h"
				#include "node_texture.h"

				void voronoi_2(point p, string metric, float da[2])
				{
				/* 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;

				if( metric == "Manhattan" ){
				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 = fabs(pd[0]) + fabs(pd[1]) + fabs(pd[2]);
				if (d < da[0]) {
				da[1] = da[0];
				da[0] = d;
				}
				else if (d < da[1]) {
				da[1] = d;
				}
				}
				}
				}
				}else if( metric == "Chebychev" ){
				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 = max(fabs(pd[0]), max(fabs(pd[1]), fabs(pd[2])));
				if (d < da[0]) {
				da[1] = da[0];
				da[0] = d;
				}
				else if (d < da[1]) {
				da[1] = d;
				}
				}
				}
				}
				}else if( metric == "Distance" ){
				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 = length(pd);
				if (d < da[0]) {
				da[1] = da[0];
				da[0] = d;
				}
				else if (d < da[1]) {
				da[1] = d;
				}
				}
				}
				}
				}else{ /* distance squared is the default */
				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 = dot(pd, pd);
				if (d < da[0]) {
				da[1] = da[0];
				da[0] = d;
				}
				else if (d < da[1]) {
				da[1] = d;
				}
				}
				}
				}
				}
				}

				/* Voronoi */

				shader node_voronoi_crackle_texture(
				int use_mapping = 0,
				matrix mapping = matrix(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
				string Coloring = "Intensity",
				string Metric = "Distance Squared",
				float Scale = 5.0,
				point Vector = P,
				output float Fac = 0.0,
				output color Color = 0.0)
				{
				point p = Vector;

				if (use_mapping)
				p = transform(mapping, p);

				/* compute distance to 2 nearest neighbours */
				float da[2];

				voronoi_2(p * Scale, Metric, da);

				Fac = fabs(da[1]) - fabs(da[0]);
				Color = color(Fac);
				}