pretty-automata/shaders/cellstate_common.glsl

struct CellState {
    bool alive;
    bool starving;
    uint age; // max 65025
    uint starve_duration; // max 255
};

CellState cellstate_from_data(uint data) {
    bool alive = (data & uint(0x1)) == 1;
    bool starving = ((data >> 1) & uint(0x1)) == 1;
    uint age = (data >> 8) & uint(0xFFFF);
    uint starve_duration = (data >> 24) & uint(0xFF);

    return CellState(alive, starving, age, starve_duration);
}

uint cellstate_to_data(CellState cellstate) {
    return (cellstate.starve_duration << 24)
    | (cellstate.age << 8)
    | (cellstate.starving ? uint(0x2) : uint(0x0))
    | (cellstate.alive ? uint(0x1) : uint(0x0));
}