libcruft-util/noise.cpp

39 lines
1.2 KiB
C++

/*
* This file is part of libgim.
*
* libgim 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 3 of the License, or (at your option) any later
* version.
*
* libgim 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 libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2011 Danny Robson <danny@nerdcruft.net>
*/
#include "noise.hpp"
#include "range.hpp"
#include <iostream>
#include <limits>
void
util::noise::image2d (uint8_t *restrict pixels,
size_t width,
size_t height,
const util::noise::fractal &p) {
for (size_t y = 0; y < height; ++y)
for (size_t x = 0; x < width; ++x) {
double v = p.eval (x, y);
pixels[x + y * width] = static_cast<uint8_t> (v * std::numeric_limits<uint8_t>::max ());
}
}