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116 lines
2.6 KiB
116 lines
2.6 KiB
//
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// main.cpp
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// ImageStreams
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//
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// Created by Joshua Moerman on 9/7/12.
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// Copyright (c) 2012 Vadovas. All rights reserved.
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//
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#include <iostream>
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#include "png.hpp"
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#include "bmp.hpp"
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#include "basics.hpp"
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#include <cmath>
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#include <vector>
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#include <algorithm>
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template <typename ImageType>
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void xor_color(std::string filename){
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size_t size = 512;
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ImageType image(size, size, filename);
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for(int y = 0; y < size; ++y){
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for(int x = 0; x < size; ++x){
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image << typename ImageType::pixel(x ^ y, (2 * x) ^ y, x ^ (2 * y));
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}
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}
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}
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template <typename ImageType>
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void xor_grad(std::string filename){
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size_t size = 256;
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ImageType image(size, size, filename);
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for(int y = 0; y < size; ++y){
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for(int x = 0; x < size; ++x){
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if(x < size/2)
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image << typename ImageType::pixel(x ^ y);
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else
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image << typename ImageType::pixel(y);
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}
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}
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}
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inline double nice_rand(){
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return rand() / double(RAND_MAX);
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}
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template <typename ImageType>
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void noise(std::string filename){
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size_t size = 256;
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ImageType image(size, size, filename);
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for(int i = 0; i < size*size; ++i)
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image << typename ImageType::pixel(nice_rand());
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}
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template <typename ImageType>
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void automata(std::string filename){
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size_t width = 1024;
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size_t height = 768;
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std::vector<int> r1(width, 0);
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std::vector<int> r2(width, 0);
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r1[width/3] = 1;
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ImageType image(width, height, filename);
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for(int y = 0; y < height; ++y){
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for(auto x : r1) image << typename ImageType::pixel((double)x);
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r1.swap(r2);
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for(int x = 1; x < width-1; ++x){
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r1[x] = (r2[x-1] || r2[x] || r2[x+1]) && !(r2[x-1] && r2[x] && r2[x+1]);
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}
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}
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}
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inline double logistic_step(double in, double c){
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return c * in * (1.0 - in);
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}
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template <typename ImageType>
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void logistic(std::string filename) {
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size_t size = 800;
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double x = 0.5;
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double start = 3.7;
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double end = 4.0;
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ImageType image(size, size, filename);
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for(int i = 0; i < size*size; ++i){
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double c = start + i * (end - start) / (size*size);
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// I know; the order of evaluation is implementation defined
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image << typename ImageType::pixel(x = logistic_step(x, c), x = logistic_step(x, c), x = logistic_step(x, c));
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}
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}
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int main(int argc, const char * argv[]){
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xor_color<png::colored_ostream>("xor_color.png");
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xor_color<bmp::colored_ostream>("xor_color.bmp");
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xor_grad<png::gray_ostream>("xor_grad.png");
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xor_grad<bmp::gray_ostream>("xor_grad.bmp");
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noise<png::gray_ostream>("noise.png");
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noise<bmp::gray_ostream>("noise.bmp");
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automata<png::gray_ostream>("automata.png");
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automata<bmp::gray_ostream>("automata.bmp");
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logistic<png::colored_ostream>("logistic.png");
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logistic<bmp::colored_ostream>("logistic.bmp");
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}
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