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Pong fully working
This commit is contained in:
Jason Turner
parent
70aa76dce9
commit
74b2f129bf
423
pong2.cpp
423
pong2.cpp
@ -12,7 +12,7 @@ constexpr uint16_t SPRITE_POSITION_REGISTERS = VIDEO_REGISTERS;
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constexpr uint16_t SPRITE_COLLISIONS = VIDEO_REGISTERS + 30;
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constexpr uint16_t SPRITE_MULTICOLOR = VIDEO_REGISTERS + 28;
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constexpr uint16_t VIDEO_MEMORY = 1024;
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constexpr auto starting_bank = 192;
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constexpr uint8_t SPRITE_STARTING_BANK = 192;
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namespace {
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@ -22,268 +22,164 @@ volatile uint8_t &memory(const uint16_t loc)
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return *reinterpret_cast<uint8_t *>(loc);
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}
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struct Color
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constexpr bool test_bit(const uint8_t data, const uint8_t bit)
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{
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enum class Name : uint8_t {
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Black = 0,
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White = 1,
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Red = 2,
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Cyan = 3,
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Purple = 4,
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Green = 5,
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Blue = 6,
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Yellow = 7,
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Orange = 8,
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Brown = 9,
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LightRed = 10,
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DarkGrey = 11,
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Grey = 12,
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LightGreen = 13,
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LightBlue = 14,
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LightGrey = 15
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};
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constexpr Color(const Name t_name, const uint8_t t_r, const uint8_t t_g, const uint8_t t_b)
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: name(t_name), r(t_r), g(t_g), b(t_b)
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{
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}
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Name name;
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uint8_t r;
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uint8_t g;
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uint8_t b;
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return (data & (1 << bit)) != 0;
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};
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template<typename T>
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constexpr auto square(T t)
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void set_bit(const uint16_t loc, const uint8_t bitnum, bool val)
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{
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return t*t;
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}
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constexpr auto distance(const Color &lhs, const uint8_t t_r, const uint8_t t_g, const uint8_t t_b)
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{
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// http://stackoverflow.com/questions/4754506/color-similarity-distance-in-rgba-color-space
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return square(lhs.r - t_r) + square(lhs.g - t_g) + square(lhs.b - t_b);
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}
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template<typename T>
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constexpr auto distance_table(T colors, const uint8_t t_r, const uint8_t t_g, const uint8_t t_b)
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{
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std::array<int, colors.size()> distances{};
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auto pos = std::begin(distances);
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for (const auto &color : colors) {
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*pos = distance(color, t_r, t_g, t_b);
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++pos;
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if (val) {
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memory(loc) |= (1 << bitnum);
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} else {
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memory(loc) &= (0xFF ^ (1 << bitnum));
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}
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return distances;
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}
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template<typename T>
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constexpr Color nearest_color(T colors,
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const uint8_t t_r, const uint8_t t_g, const uint8_t t_b)
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{
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const auto ds = distance_table(colors, t_r, t_g, t_b);
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const auto distance = std::min_element(std::begin(ds), std::end(ds)) - std::begin(ds);
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return colors[distance];
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/*
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return *std::min_element(std::begin(colors), std::end(colors),
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[&](const auto &lhs, const auto &rhs)
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{
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return distance(lhs, t_r, t_g, t_b) < distance(rhs, t_r, t_g, t_b);
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});
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*/
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}
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void clear_bit(const uint16_t loc, const uint8_t bitnum)
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{
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memory(loc) &= (0xFF ^ (1 << bitnum));
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}
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void set_bit(const uint16_t loc, const uint8_t bitnum)
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{
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memory(loc) |= (1 << bitnum);
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}
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void write_multi_color_pixel(uint16_t)
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{
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}
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void write_pixel(uint16_t)
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{
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}
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template<typename D1, typename D2, typename D3, typename D4, typename ... D >
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void write_multi_color_pixel(uint16_t loc, D1 d1, D2 d2, D3 d3, D4 d4, D ... d)
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{
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memory(loc) = (d1 << 6) | (d2 << 4) | (d3 << 2) | d4;
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write_multi_color_pixel(loc + 1, d...);
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}
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constexpr bool test_bit(const uint8_t data, const uint8_t bit)
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{
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return (data & (1 << bit)) != 0;
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};
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template<typename D1, typename D2, typename D3, typename D4, typename D5, typename D6, typename D7, typename D8, typename ... D >
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void write_pixel(uint16_t loc, D1 d1, D2 d2, D3 d3, D4 d4, D5 d5, D6 d6, D7 d7, D8 d8, D ... d)
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{
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memory(loc) = (d1 << 7) | (d2 << 6) | (d3 << 5) | (d4 << 4) | (d5 << 3) | (d6 << 2) | (d7 << 1) | d8;
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write_pixel(loc + 1, d...);
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}
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template<typename ... D>
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void make_sprite(uint8_t memory_loc, D ... d)
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{
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write_multi_color_pixel((starting_bank + memory_loc) * 64, d...);
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if constexpr (sizeof...(d) == 12 * 21) {
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write_multi_color_pixel((SPRITE_STARTING_BANK + memory_loc) * 64, d...);
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} else {
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write_pixel((SPRITE_STARTING_BANK + memory_loc) * 64, d...);
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}
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}
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void enable_sprite(const uint8_t sprite_number, const uint8_t memory_loc,
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const bool multicolor,
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const bool double_width, const bool double_height)
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{
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set_bit(SPRITE_ENABLE_BITS, sprite_number);
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memory(SPRITE_DATA_POINTERS + sprite_number) = starting_bank + memory_loc;
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if (double_width) {
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set_bit(SPRITE_EXPAND_HORIZONTAL, sprite_number);
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} else {
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clear_bit(SPRITE_EXPAND_HORIZONTAL, sprite_number);
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}
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if (double_height) {
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set_bit(SPRITE_EXPAND_VERTICAL, sprite_number);
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} else {
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clear_bit(SPRITE_EXPAND_VERTICAL, sprite_number);
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}
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if (multicolor) {
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set_bit(SPRITE_MULTICOLOR, sprite_number);
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} else {
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clear_bit(SPRITE_MULTICOLOR, sprite_number);
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}
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set_bit(SPRITE_ENABLE_BITS, sprite_number, true);
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memory(SPRITE_DATA_POINTERS + sprite_number) = SPRITE_STARTING_BANK + memory_loc;
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set_bit(SPRITE_EXPAND_HORIZONTAL, sprite_number, double_width);
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set_bit(SPRITE_EXPAND_VERTICAL, sprite_number, double_height);
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set_bit(SPRITE_MULTICOLOR, sprite_number, multicolor);
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}
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void display_int(uint8_t x, uint8_t y, uint8_t val)
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void display(uint8_t x, uint8_t y, uint8_t val)
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{
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memory(VIDEO_MEMORY + y * 40 + x) = val;
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}
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auto joystick(const uint8_t port) {
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struct State{
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State(const uint8_t portdata)
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: up(!test_bit(portdata,0)),
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down(!test_bit(portdata,1)),
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left(!test_bit(portdata,2)),
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right(!test_bit(portdata,3)),
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fire(!test_bit(portdata,4))
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{
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}
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bool up;
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bool down;
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bool left;
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bool right;
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bool fire;
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};
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if (port == 2) {
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return State(memory(56320));
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} else {
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return State(memory(56321));
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}
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};
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volatile uint8_t &sprite_x(const uint8_t sprite_num)
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{
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return memory(SPRITE_POSITION_REGISTERS + sprite_num * 2);
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};
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volatile uint8_t &sprite_y(const uint8_t sprite_num)
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{
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return memory(SPRITE_POSITION_REGISTERS + sprite_num * 2 + 1);
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};
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}
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int main()
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{
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constexpr std::array<Color, 16> colors {Color{Color::Name::Black, 0,0,0},
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Color{Color::Name::White, 255,255,255},
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Color{Color::Name::Red, 104, 55, 43},
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Color{Color::Name::Cyan, 112, 164, 178},
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Color{Color::Name::Purple, 111, 61, 134},
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Color{Color::Name::Green, 88, 141, 67},
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Color{Color::Name::Blue, 53, 40, 121},
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Color{Color::Name::Yellow, 184, 199, 111},
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Color{Color::Name::Orange, 111, 79, 37},
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Color{Color::Name::Brown, 67, 57, 0},
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Color{Color::Name::LightRed, 154, 103, 89},
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Color{Color::Name::DarkGrey, 68, 68, 68},
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Color{Color::Name::Grey, 108, 108, 108},
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Color{Color::Name::LightGreen, 154, 210, 132},
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Color{Color::Name::LightBlue, 108, 94, 181},
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Color{Color::Name::LightGrey, 149, 149, 149}};
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//constexpr auto nearest_black = nearest_color(colors, 0, 0, 0);
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//constexpr auto nearest_red = nearest_color(colors, 255, 255, 0);
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make_sprite(0,
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0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,2,2,2,2,0,0,0,0,
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0,0,0,2,2,2,2,2,2,0,0,0,
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0,0,2,2,2,1,1,2,2,2,0,0,
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0,0,2,2,1,1,1,1,2,2,0,0,
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0,0,2,2,1,1,1,1,2,2,0,0,
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0,0,2,2,1,1,1,1,2,2,0,0,
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0,0,2,2,1,1,1,1,2,2,0,0,
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0,0,2,2,1,1,1,1,2,2,0,0,
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0,0,2,2,1,1,1,1,2,2,0,0,
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0,0,2,2,1,1,1,1,2,2,0,0,
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0,0,2,2,2,1,1,2,2,2,0,0,
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0,0,0,2,2,2,2,2,2,0,0,0,
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0,0,0,0,2,2,2,2,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,
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0,0,0,0,0,0,1,1,0,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,
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0,0,0,0,0,1,1,0,0,0,1,1,1,1,1,1,1,1,1,0,0,0,0,0,
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0,0,0,0,0,1,1,1,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,
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0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,
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0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,
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0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,
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0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,
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0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,
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0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,
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0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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);
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enable_sprite(0, 0, true, false, false);
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enable_sprite(0, 0, false, false, false);
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make_sprite(1,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,2,2,2,2,0,0,0,0,
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0,0,0,0,2,2,2,2,0,0,0,0,
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0,0,0,0,2,1,1,2,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,2,1,1,2,0,0,0,0,
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0,0,0,0,2,2,2,2,0,0,0,0,
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0,0,0,0,2,2,2,2,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0,
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0,0,0,0,1,1,1,1,0,0,0,0
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,2,2,0,0,0,0,0,
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0,0,0,0,0,3,3,0,0,0,0,0,
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0,0,0,0,0,1,1,0,0,0,0,0,
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0,0,0,0,0,3,3,0,0,0,0,0,
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0,0,0,0,0,1,1,0,0,0,0,0,
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0,0,0,0,0,3,3,0,0,0,0,0
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);
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enable_sprite(1, 1, true, false, true);
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enable_sprite(2, 1, true, false, true);
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const auto joy = [](const uint8_t d){
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struct State{
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State(const uint8_t portdata)
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: up(!test_bit(portdata,0)),
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down(!test_bit(portdata,1)),
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left(!test_bit(portdata,2)),
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right(!test_bit(portdata,3)),
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fire(!test_bit(portdata,4))
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{
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}
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bool up;
|
||||
bool down;
|
||||
bool left;
|
||||
bool right;
|
||||
bool fire;
|
||||
};
|
||||
return State(d);
|
||||
};
|
||||
|
||||
const auto joy_port2 = [joy](){
|
||||
return joy(memory(56320));
|
||||
};
|
||||
|
||||
const auto joy_port1 = [joy](){
|
||||
return joy(memory(56321));
|
||||
};
|
||||
|
||||
|
||||
const auto sprite_x = [](const uint8_t sprite_num) -> decltype(auto)
|
||||
{
|
||||
return (memory(SPRITE_POSITION_REGISTERS + sprite_num * 2));
|
||||
};
|
||||
|
||||
const auto sprite_y = [](const uint8_t sprite_num) -> decltype(auto)
|
||||
{
|
||||
return (memory(SPRITE_POSITION_REGISTERS + sprite_num * 2 + 1));
|
||||
};
|
||||
|
||||
const auto sprite_collisions = []() {
|
||||
const auto collisions = memory(SPRITE_COLLISIONS);
|
||||
memory(SPRITE_COLLISIONS) = 0;
|
||||
@ -302,10 +198,7 @@ int main()
|
||||
test_bit(collisions, 4),test_bit(collisions, 5),test_bit(collisions, 6),test_bit(collisions, 7)};
|
||||
};
|
||||
|
||||
|
||||
std::pair<int8_t, int8_t> ball_vec{1,1};
|
||||
uint8_t player1 = '0';
|
||||
uint8_t player2 = '0';
|
||||
|
||||
const auto reset_ball = [&]{
|
||||
sprite_x(0) = 255/2;
|
||||
@ -314,67 +207,79 @@ int main()
|
||||
|
||||
reset_ball();
|
||||
|
||||
sprite_x(1) = 20;
|
||||
sprite_y(1) = 50;
|
||||
sprite_x(1) = 15;
|
||||
sprite_y(1) = 255/2;
|
||||
|
||||
sprite_x(2) = 255;
|
||||
sprite_y(2) = 150;
|
||||
sprite_y(2) = 255/2;
|
||||
|
||||
uint8_t num_volleys = 0;
|
||||
memory(53280) = 12;
|
||||
memory(53281) = 0;
|
||||
|
||||
|
||||
struct Player
|
||||
{
|
||||
void update_position()
|
||||
{
|
||||
if (const auto joy = joystick(player_num);
|
||||
joy.up)
|
||||
{
|
||||
sprite_y(player_num) += 3;
|
||||
} else if (joy.down) {
|
||||
sprite_y(player_num) -= 3;
|
||||
}
|
||||
};
|
||||
|
||||
void scored() {
|
||||
++score;
|
||||
}
|
||||
|
||||
const uint8_t player_num;
|
||||
uint8_t score = '0';
|
||||
};
|
||||
|
||||
Player p1{1};
|
||||
Player p2{2};
|
||||
|
||||
const auto raster_off_screen = [](){
|
||||
return memory(53266) == 250 && !test_bit(memory(53265),7);
|
||||
};
|
||||
|
||||
while (true) {
|
||||
|
||||
if (memory(53266) == 245
|
||||
&& !test_bit(memory(53265),7)) {
|
||||
|
||||
if (raster_off_screen())
|
||||
{
|
||||
if (const auto collisions = sprite_collisions();
|
||||
collisions.sprite0 && (collisions.sprite1 || collisions.sprite2))
|
||||
{
|
||||
std::get<0>(ball_vec) *= -1; //invert ball x velocity
|
||||
// "bounce" vall out of collision area
|
||||
// "bounce" ball out of collision area
|
||||
sprite_x(0) += std::get<0>(ball_vec);
|
||||
++num_volleys;
|
||||
}
|
||||
|
||||
// if (num_volleys == 10) {
|
||||
// std::get<0>(ball_vec) += 1;
|
||||
// }
|
||||
|
||||
const auto ball_x = sprite_x(0) += std::get<0>(ball_vec);
|
||||
const auto ball_y = sprite_y(0) += std::get<1>(ball_vec);
|
||||
|
||||
// Update paddle positions
|
||||
if (const auto joy = joy_port1(); joy.up)
|
||||
{
|
||||
sprite_y(1) += 3;
|
||||
} else if (joy.down) {
|
||||
sprite_y(1) -= 3;
|
||||
}
|
||||
|
||||
if (const auto joy = joy_port2(); joy.up)
|
||||
{
|
||||
sprite_y(2) += 3;
|
||||
} else if (joy.down) {
|
||||
sprite_y(2) -= 3;
|
||||
}
|
||||
p1.update_position();
|
||||
p2.update_position();
|
||||
|
||||
// ball hit the top or bottom wall
|
||||
if (ball_y == 45 || ball_y == 235) {
|
||||
if (const auto ball_y = sprite_y(0) += std::get<1>(ball_vec);
|
||||
ball_y == 45 || ball_y == 235)
|
||||
{
|
||||
std::get<1>(ball_vec) *= -1;
|
||||
}
|
||||
|
||||
if (ball_x == 1) {
|
||||
if (const auto ball_x = sprite_x(0) += std::get<0>(ball_vec);
|
||||
ball_x == 1) {
|
||||
// ball hit left wall, player 2 scored
|
||||
++player2;
|
||||
p2.scored();
|
||||
reset_ball();
|
||||
} else if (ball_x == 255) {
|
||||
// ball hit right wall, player 1 scored
|
||||
++player1;
|
||||
p1.scored();
|
||||
reset_ball();
|
||||
}
|
||||
|
||||
display_int(10, 12, player1);
|
||||
display_int(30, 12, player2);
|
||||
display(10, 12, p1.score);
|
||||
display(30, 12, p2.score);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user