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#pragma once
#include "common.hpp"
#include "rand.hpp"
#include <cstdint>
const int MBIT_DISPLACABLE = 1;
struct Tile {
enum Solid : unsigned char {
AIR = 0,
ROCK,
SAND,
};
enum Fluid : unsigned char {
NOTHING = 0,
WATER,
};
Solid so = {};
Fluid fl = {};
uint8_t fmass = 0;
bool updated = false;
uint32_t get_color() const;
};
struct Sandbox {
uint32_t* bitmap;
Tile* tiles;
/// Dirty rects used by the current simulation step. Only used during it.
// TODO use multiple dirty rects?
Rect dirty_curr;
/// Dirty rects to be used, when the next simulation step happens. May write to this during simulation, or outside of simulation.
Rect dirty_writeto;
RandomState _rand;
Tile _wall_tile;
int width, height;
int _x, _y;
int ncycle = 0;
Sandbox(int w, int h, RandomState rand = {});
~Sandbox();
void simulate_step();
Tile& gs(int x, int y);
void set_sand(int x, int y, Tile sand);
void shift_sand(int x, int y);
// std::vector<uint32_t> to_bitmap() const;
};
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