6502
/
6502-cpp
mirror of https://github.com/lefticus/6502-cpp.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
6502-cpp/examples/simple_game/game.cpp

553 lines
15 KiB
C++
Raw Blame History

#include <algorithm>
#include <array>
#include <chrono>
#include <cstdint>
#include <cstring>
#include <functional>
#include <span>
#include <string_view>
#include <variant>
#include "chargen.hpp"
#include "commodore64.hpp"
struct GameState;
struct Map_Action
{
geometry::rect box;
using Action_Func = void (*)(GameState &);
Action_Func action = nullptr;
constexpr void execute_if_collision(geometry::rect object,
GameState &game) const
{
if (action == nullptr) { return; }
if (box.intersects(object)) { action(game); }
}
};
template<geometry::size Size> struct Map
{
std::string_view name;
petscii::Graphic<Size> layout;
std::span<const Map_Action> actions;
};
struct GameState
{
std::uint8_t endurance{ 10 };
std::uint8_t stamina{ max_stamina() };
std::uint16_t cash{ 100 };
geometry::point location{ 20, 12 };
bool redraw = true;
c64::Clock game_clock{};
Map<geometry::size{ 10, 5 }> const *current_map = nullptr;
constexpr void set_current_map(const Map<geometry::size{ 10, 5 }> &new_map)
{
current_map = &new_map;
redraw = true;
}
constexpr void execute_actions(geometry::point new_location, const auto &character) noexcept
{
if (new_location.x + character.size().width > 40) { new_location.x = location.x; }
if (new_location.y + character.size().height > 20) { new_location.y = location.y; }
location = new_location;
if (current_map) {
for (auto &action : current_map->actions) { action.execute_if_collision({location, character.size()}, *this); }
}
}
[[nodiscard]] constexpr std::uint8_t max_stamina() const noexcept { return endurance * 5; }
struct JoyStick1StateChanged
{
c64::Joystick state;
};
struct JoyStick2StateChanged
{
c64::Joystick state;
};
struct TimeElapsed
{
c64::Clock::milliseconds us;
};
using Event = std::variant<JoyStick2StateChanged, TimeElapsed>;
std::uint8_t last_joystick_2_state = mos6502::peek(0xDC00);
Event next_event() noexcept
{
const auto new_joystick_2_state = mos6502::peek(0xDC00);
if (new_joystick_2_state != last_joystick_2_state) {
last_joystick_2_state = new_joystick_2_state;
return JoyStick2StateChanged{ c64::Joystick{ new_joystick_2_state } };
}
return TimeElapsed{ game_clock.restart() };
}
};
static void puts(const geometry::point loc, const auto &range, const vicii::Colors color = vicii::Colors::white)
{
const auto offset = static_cast<std::uint16_t>(loc.y * 40 + loc.x);
const std::uint16_t start = 0x400 + offset;
std::copy(begin(range), end(range), &mos6502::memory_loc(start));
for (std::uint16_t color_loc = 0; color_loc < range.size(); ++color_loc) {
mos6502::poke(static_cast<std::uint16_t>(0xD800 + color_loc + offset), static_cast<std::uint8_t>(color));
}
}
static constexpr auto load_charset(const std::span<const std::uint8_t, 256 * 8> &bits)
{
std::array<petscii::Graphic<geometry::size{ 8, 8 }>, 256> results{};
for (std::size_t idx = 0; idx < 256; ++idx) {
petscii::Graphic<geometry::size{ 8, 8 }> glyph{};
for (std::uint8_t row = 0; row < 8; ++row) {
const auto input_row = bits[idx * 8 + row];
glyph[geometry::point{ 0, row }] = (0b1000'0000 & input_row) == 0 ? 0 : 1;
glyph[geometry::point{ 0, row }] = (0b0100'0000 & input_row) == 0 ? 0 : 1;
glyph[geometry::point{ 0, row }] = (0b0010'0000 & input_row) == 0 ? 0 : 1;
glyph[geometry::point{ 0, row }] = (0b0001'0000 & input_row) == 0 ? 0 : 1;
glyph[geometry::point{ 0, row }] = (0b0000'1000 & input_row) == 0 ? 0 : 1;
glyph[geometry::point{ 0, row }] = (0b0000'0100 & input_row) == 0 ? 0 : 1;
glyph[geometry::point{ 0, row }] = (0b0000'0010 & input_row) == 0 ? 0 : 1;
glyph[geometry::point{ 0, row }] = (0b0000'0001 & input_row) == 0 ? 0 : 1;
}
results[idx] = glyph;
}
return results;
}
template<geometry::size Size> static constexpr auto from_pixels_to_petscii(const petscii::Graphic<Size> &pixels)
{
petscii::Graphic<geometry::size{ Size.width / 8, Size.height / 8 }> result{};
constexpr auto charset = load_charset(uppercase);
for (uint8_t x = 0; x < pixels.width(); x += 8) {
for (uint8_t y = 0; y < pixels.height(); y += 8) {
std::uint8_t best_match = 32;
std::size_t match_count = 0;
std::uint8_t cur_char = 0;
for (const auto &glyph : charset) {
const auto count = pixels.match_count(glyph, x, y);
if (count > match_count) {
best_match = cur_char;
match_count = count;
}
++cur_char;
}
result(x / 8, y / 8) = best_match;
}
}
return result;
}
template<geometry::size Size> static constexpr auto from_pixels_to_2x2(const petscii::Graphic<Size> &pixels)
{
petscii::Graphic<geometry::size{ Size.width / 2, Size.height / 2 }> result{};
using GlyphType = std::pair<petscii::Graphic<geometry::size{ 2, 2 }>, std::uint8_t>;
constexpr std::array<GlyphType, 17> lookup_map{ GlyphType{ { 0, 0, 0, 0 }, 32 },
GlyphType{ { 1, 0, 0, 0 }, 126 },
GlyphType{ { 0, 1, 0, 0 }, 124 },
GlyphType{ { 1, 1, 0, 0 }, 226 },
GlyphType{ { 0, 0, 1, 0 }, 123 },
GlyphType{ { 1, 0, 1, 0 }, 97 },
GlyphType{ { 0, 1, 1, 0 }, 255 },
GlyphType{ { 1, 1, 1, 0 }, 236 },
GlyphType{ { 0, 0, 0, 1 }, 108 },
GlyphType{ { 1, 0, 0, 1 }, 127 },
GlyphType{ { 0, 1, 0, 1 }, 225 },
GlyphType{ { 1, 1, 0, 1 }, 251 },
GlyphType{ { 0, 0, 1, 1 }, 98 },
GlyphType{ { 1, 0, 1, 1 }, 252 },
GlyphType{ { 0, 1, 1, 1 }, 254 },
GlyphType{ { 1, 1, 1, 1 }, 160 } };
for (uint8_t x = 0; x < pixels.width(); x += 2) {
for (uint8_t y = 0; y < pixels.height(); y += 2) {
for (const auto &glyph : lookup_map) {
if (pixels.match(glyph.first, x, y)) {
result(x / 2, y / 2) = glyph.second;
break;// go to next Y, we found our match
}
}
}
}
return result;
}
template<geometry::size Size> struct SimpleSprite
{
geometry::point location{};
bool is_shown = false;
petscii::Graphic<Size> graphic;
petscii::Graphic<Size> saved_background{};
constexpr SimpleSprite(std::initializer_list<uint8_t> data_) noexcept : graphic(data_) {}
};
// helper type for the visitor #4
template<class... Ts> struct overloaded : Ts...
{
using Ts::operator()...;
};
// explicit deduction guide (not needed as of C++20)
template<class... Ts> overloaded(Ts...) -> overloaded<Ts...>;
struct Menu
{
consteval Menu(std::span<const std::string_view> t_options)
: options{ t_options }, box{ geometry::rect{ { 0, 0 },
{ static_cast<std::uint8_t>(
std::max_element(begin(options),
end(options),
[](std::string_view lhs, std::string_view rhs) { return lhs.size() < rhs.size(); })
->size()
+ 2),
static_cast<std::uint8_t>(options.size() + 2) } }
.centered() }
{}
void highlight(std::uint8_t selection)
{
const auto cur_y = static_cast<std::uint8_t>(selection + 1 + box.top_left().y);
for (std::uint8_t cur_x = 1; cur_x < box.width() - 1; ++cur_x) {
vicii::invertc(geometry::point{ static_cast<std::uint8_t>(box.top_left().x + cur_x), cur_y });
}
}
void unhighlight(std::uint8_t selection) { highlight(selection); }
void hide(GameState &game)
{
displayed = false;
game.redraw = true;
}
bool show([[maybe_unused]] GameState &game, std::uint8_t &selection)
{
if (!displayed) {
displayed = true;
draw_box(box, vicii::Colors::white);
for (auto pos = box.top_left() + geometry::point{ 1, 1 }; const auto &str : options) {
puts(pos, str, vicii::Colors::grey);
pos = pos + geometry::point{ 0, 1 };
}
highlight(current_selection);
}
if (current_selection != next_selection) {
unhighlight(current_selection);
highlight(next_selection);
current_selection = next_selection;
}
if (selected) {
selected = false;
selection = current_selection;
return true;
} else {
return false;
}
}
bool process_event(const GameState::Event &e)
{
if (not displayed) { return false; }
if (const auto *ptr = std::get_if<GameState::JoyStick2StateChanged>(&e); ptr) {
if (ptr->state.up()) { next_selection = current_selection - 1; }
if (ptr->state.down()) { next_selection = current_selection + 1; }
if (next_selection > options.size() - 1) { next_selection = static_cast<std::uint8_t>(options.size() - 1); }
if (ptr->state.fire()) { selected = true; }
return true;
}
return false;
}
std::span<const std::string_view> options;
geometry::rect box;
std::uint8_t current_selection{ 0 };
std::uint8_t next_selection{ 0 };
bool selected{ false };
bool displayed{ false };
};
enum struct State { Walking, SystemMenu, AboutBox };
int main()
{
// static constexpr auto charset = load_charset(uppercase);
// clang-format off
static constexpr auto inn = petscii::Graphic<geometry::size{6,5}> {
32,233,160,160,223,32,
233,160,160,160,160,223,
160,137,142,142,160,160,
160,160,160,160,79,160,
160,160,160,160,76,160,
};
static constexpr auto gym = petscii::Graphic<geometry::size{6,5}> {
32,233,160,160,223,32,
233,160,160,160,160,223,
160,135,153,141,160,160,
160,160,160,160,79,160,
160,160,160,160,76,160,
};
static constexpr auto trading_post = petscii::Graphic<geometry::size{6,5}> {
32,233,160,160,223,32,
233,160,160,160,160,223,
148,146,129,132,133,160,
160,160,160,160,79,160,
160,160,160,160,76,160,
};
/*
static constexpr auto town = Graphic<4, 4>{
85, 67, 67, 73,
93, 233, 223, 93,
93, 160, 160, 93,
74, 67, 67, 75 };
*/
static constexpr auto town = petscii::ColoredGraphic<geometry::size{4, 4}>{
{
32, 32,32, 32,
233,223,233,223,
224,224,224,224,
104,104,104,104
},
{
2,2,10,10,
4,4,7,7,
4,4,7,7,
11,11,11,11
}
};
/*
static constexpr auto mountain = petscii::Graphic<geometry::size{4, 4}>{
32, 78, 77, 32,
32, 32, 78, 77,
78, 77, 32, 32,
32, 78, 77, 32 };
*/
static constexpr auto colored_mountain = petscii::ColoredGraphic<geometry::size{4, 4}>{
{
32, 78, 77, 32,
32, 32, 233, 223,
233, 223, 32, 32,
32, 78, 77, 32 },
{
1, 9, 9, 1,
1, 1, 8, 8,
9, 9, 1, 1,
1, 8, 8, 1
}
};
auto character = SimpleSprite<geometry::size{2,3}>{
32, 87,
78, 79,
78, 77 };
static constexpr auto city_map = Map<geometry::size{10,5}>{
"wood town",
{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 4, 0, 0, 0, 0, 6, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 5, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
},
std::span<const Map_Action>{}
};
static constexpr auto overview_actions = std::array {
Map_Action { {{16,0},{4,4}}, [](GameState &g) { g.set_current_map(city_map); } }
};
static constexpr auto overview_map = Map<geometry::size{10, 5}>{
"the world",
{
3, 1, 1, 0, 3, 0, 0, 0, 0, 0,
0, 0, 1, 1, 0, 0, 0, 0, 3, 0,
0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
0, 0, 3, 0, 0, 0, 0, 0, 0, 0,
0, 1, 1, 1, 0, 0, 3, 0, 0, 0,
},
std::span<const Map_Action>(begin(overview_actions), end(overview_actions))
};
// clang-format on
static constexpr std::array<void (*)(geometry::point), 7> tile_types{
[](geometry::point) {},
[](geometry::point p) { vicii::put_graphic(p, colored_mountain); },
[](geometry::point) {},
[](geometry::point p) { vicii::put_graphic(p, town); },
[](geometry::point p) { vicii::put_graphic(p, inn); },
[](geometry::point p) { vicii::put_graphic(p, gym); },
[](geometry::point p) { vicii::put_graphic(p, trading_post); },
};
const auto draw_map = [](const auto &map) {
for (std::size_t tile = 0; tile < tile_types.size(); ++tile) {
for (const auto &pos : map.size()) {
if (map[pos] == tile) { tile_types[tile]({static_cast<std::uint8_t>(pos.x * 4), static_cast<std::uint8_t>(pos.y * 4)}); }
}
}
};
GameState game;
State state = State::Walking;
game.current_map = &overview_map;
constexpr auto show_stats = [](const auto &cur_game) {
puts(geometry::point{ 1, 21 }, petscii::PETSCII("STAMINA:"), vicii::Colors::light_grey);
put_hex(geometry::point{ 12, 21 }, cur_game.stamina, vicii::Colors::white);
put_hex(geometry::point{ 15, 21 }, cur_game.max_stamina(), vicii::Colors::white);
puts(geometry::point{ 14, 21 }, petscii::PETSCII("/"), vicii::Colors::light_grey);
puts(geometry::point{ 1, 22 }, petscii::PETSCII("ENDURANCE:"), vicii::Colors::light_grey);
put_hex(geometry::point{ 12, 22 }, cur_game.endurance, vicii::Colors::white);
puts(geometry::point{ 1, 23 }, petscii::PETSCII("CASH:"), vicii::Colors::light_grey);
put_hex(geometry::point{ 12, 23 }, cur_game.cash, vicii::Colors::white);
};
vicii::Screen screen;
static constexpr auto menu_options = std::array{ std::string_view{ "info" },
std::string_view{ "test2" },
std::string_view{ "test3" },
std::string_view{ "an even longer thing" } };
Menu m(menu_options);
auto eventHandler = overloaded{ [&](const GameState::JoyStick2StateChanged &e) {
auto new_loc = game.location;
if (e.state.fire()) {
state = State::SystemMenu;
return;
}
if (e.state.up()) { --new_loc.y; }
if (e.state.down()) { ++new_loc.y; }
if (e.state.left()) { --new_loc.x; }
if (e.state.right()) { ++new_loc.x; }
game.execute_actions(new_loc, character.graphic);
screen.show(game.location, character);
put_hex({36, 1}, e.state.state, vicii::Colors::dark_grey);
},
[](const GameState::TimeElapsed &e) { vicii::put_hex({36, 0}, e.us.count(), vicii::Colors::dark_grey); } };
while (true) {
const auto next_event = game.next_event();
if (not m.process_event(next_event)) {
// if no gui elements needed the event, then we handle it
std::visit(eventHandler, next_event);
}
if (game.redraw) {
screen.hide(character);
vicii::cls();
mos6502::poke(53280, 0);
mos6502::poke(53281, 0);
game.redraw = false;
draw_map(game.current_map->layout);
draw_box(geometry::rect{ { 0, 20 }, { 40, 5 } }, vicii::Colors::dark_grey);
puts(geometry::point{ 10, 20 }, game.current_map->name, vicii::Colors::white);
show_stats(game);
screen.show(game.location, character);
}
if (std::uint8_t result = 0; state == State::SystemMenu && m.show(game, result)) {
// we had a menu item selected
m.hide(game);
if (result == 0) {}
vicii::increment_border_color();
}
/*
const auto background_color = [](Colors col) {
memory_loc(0xd021) = static_cast<uint8_t>(col);
};
background_color(Colors::WHITE);
while(true) {
if (joystick_down()) {
increment_border_color();
} else {
decrement_border_color();
}
}
*/
}
}
Reference in New Issue View Git Blame Copy Permalink