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/* Copyright (C) 2024 Aryadev Chavali
* 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 Version 2 for
* details.
* You may distribute and modify this code under the terms of the GNU General
* Public License Version 2, which you should have received a copy of along with
* this program. If not, please go to <https://www.gnu.org/licenses/>.
* Created: 2024-07-25
* Author: Aryadev Chavali
* Description: Entrypoint
*/
#include "./numerics.hpp"
#include <cmath>
#include <cstdio>
#include <iostream>
#include <sstream>
#include <tuple>
#include <raylib.h>
#define WIDTH 1024
#define HEIGHT 1024
#define FONT_SIZE 10
#define CIRCLE_SIZE 2
#define LINE_TOP (7 * HEIGHT / 16)
#define LINE_BOTTOM (9 * HEIGHT / 16)
Node rightmost_node(const NodeAllocator &allocator)
{
auto node = allocator.getVal(0);
while (node.right.has_value())
node = allocator.getVal(node.right.value());
return node;
}
Node leftmost_node(const NodeAllocator &allocator)
{
auto node = allocator.getVal(0);
while (node.left.has_value())
node = allocator.getVal(node.left.value());
return node;
}
constexpr word_t clamp_to_width(long double value, long double min,
long double max)
{
// translate v in [min, max] -> v' in [0, WIDTH]
// [min, max] -> [0, max-min] -> [0, WIDTH]
return WIDTH / (max - min) * (value - min);
}
void draw_fraction(Fraction f, word_t x, word_t y)
{
std::string s{to_string(f)};
// Centered at (x, y)
int width = MeasureText(s.c_str(), FONT_SIZE);
DrawText(s.c_str(), x - width / 2, y - FONT_SIZE, FONT_SIZE, WHITE);
}
void draw_node_number_line(index_t index, const NodeAllocator &allocator,
long double lower, long double upper)
{
if (index.has_value())
{
Node n = allocator.getVal(index.value());
word_t x = clamp_to_width(n.value.norm, lower, upper);
DrawLine(x, LINE_TOP, x, LINE_BOTTOM, index.value() == 0 ? GREEN : RED);
draw_node_number_line(n.left, allocator, lower, upper);
draw_node_number_line(n.right, allocator, lower, upper);
}
}
int main(void)
{
// NodeAllocator allocator{256};
// std::queue<word_t> to_iterate;
// Fraction best_frac{1, 2};
// word_t root = allocator.alloc_node({best_frac});
// to_iterate.push(root);
InitWindow(800, 600, "Calkin-Wilf Trees");
while (!WindowShouldClose())
{
ClearBackground(BLACK);
BeginDrawing();
DrawText("Hello, world!", 50, 50, 25, WHITE);
EndDrawing();
}
CloseWindow();
return 0;
}
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