23564583a4
This patch extends perlin noise to operate in 1D, 2D, 3D, and 4D space. The noise code has also been refactored to be more readable. The Color output and distortion patterns changed, so this patch breaks backward compatibility. This is due to the fact that we now use random offsets as noise seeds, as opposed to swizzling and constants offsets. Reviewers: brecht, JacquesLucke Differential Revision: https://developer.blender.org/D5560
120 lines
3.5 KiB
Plaintext
120 lines
3.5 KiB
Plaintext
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "stdosl.h"
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/* Brick */
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float brick_noise(int ns) /* fast integer noise */
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{
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int nn;
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int n = (ns + 1013) & 2147483647;
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n = (n >> 13) ^ n;
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nn = (n * (n * n * 60493 + 19990303) + 1376312589) & 2147483647;
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return 0.5 * ((float)nn / 1073741824.0);
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}
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float brick(point p,
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float mortar_size,
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float mortar_smooth,
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float bias,
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float BrickWidth,
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float row_height,
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float offset_amount,
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int offset_frequency,
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float squash_amount,
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int squash_frequency,
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output float tint)
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{
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int bricknum, rownum;
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float offset = 0.0;
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float brick_width = BrickWidth;
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float x, y;
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rownum = (int)floor(p[1] / row_height);
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if (offset_frequency && squash_frequency) {
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brick_width *= (rownum % squash_frequency) ? 1.0 : squash_amount; /* squash */
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offset = (rownum % offset_frequency) ? 0.0 : (brick_width * offset_amount); /* offset */
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}
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bricknum = (int)floor((p[0] + offset) / brick_width);
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x = (p[0] + offset) - brick_width * bricknum;
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y = p[1] - row_height * rownum;
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tint = clamp((brick_noise((rownum << 16) + (bricknum & 65535)) + bias), 0.0, 1.0);
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float min_dist = min(min(x, y), min(brick_width - x, row_height - y));
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if (min_dist >= mortar_size) {
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return 0.0;
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}
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else if (mortar_smooth == 0.0) {
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return 1.0;
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}
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else {
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min_dist = 1.0 - min_dist / mortar_size;
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return smoothstep(0.0, mortar_smooth, min_dist);
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}
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}
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shader node_brick_texture(int use_mapping = 0,
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matrix mapping = matrix(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
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float offset = 0.5,
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int offset_frequency = 2,
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float squash = 1.0,
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int squash_frequency = 1,
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point Vector = P,
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color Color1 = 0.2,
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color Color2 = 0.8,
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color Mortar = 0.0,
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float Scale = 5.0,
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float MortarSize = 0.02,
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float MortarSmooth = 0.0,
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float Bias = 0.0,
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float BrickWidth = 0.5,
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float RowHeight = 0.25,
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output float Fac = 0.0,
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output color Color = 0.2)
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{
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point p = Vector;
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if (use_mapping)
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p = transform(mapping, p);
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float tint = 0.0;
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color Col = Color1;
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Fac = brick(p * Scale,
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MortarSize,
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MortarSmooth,
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Bias,
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BrickWidth,
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RowHeight,
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offset,
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offset_frequency,
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squash,
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squash_frequency,
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tint);
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if (Fac != 1.0) {
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float facm = 1.0 - tint;
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Col = facm * Color1 + tint * Color2;
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}
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Color = mix(Col, Mortar, Fac);
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}
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