phillipandAntigravity
496de1a31f
- Make handle_vblank strictly increment frame counter (frame++) - Move heavy frame logic (background updates, OAM updates, palette animations, and console stats) to update_frame() on the main thread synchronized with swiWaitForVBlank() - Eliminate 256-byte ARM9 IRQ stack (sp_irq) overflow caused by bg_update and iprintf that was corrupting DTCM stack and causing data aborts - Preserve all playfield entities on game over with top-screen defeat summary and smooth background deceleration Co-authored-by: Antigravity <antigravity@google.com>
78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
#ifndef GAME_STATE_H
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#define GAME_STATE_H
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#include <array>
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#include <deque>
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#include <vector>
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#include <nds/ndstypes.h>
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#include "consts.h"
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enum class Scene {
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Menu,
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Playing,
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};
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constexpr int MENU_ITEM_COUNT = 3;
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enum class GameOverReason : uint8_t {
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None = 0,
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SelfCollision,
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BarrierCollision,
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RottenAppleDepleted,
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};
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enum class BarrierPhase : uint8_t {
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Inactive, // Slot free
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Warning, // Flashing announcement, harmless
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Active, // Solid and fatal to the snake head
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};
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// Temporary hard-mode wall: a straight line of `length` cells starting at (x, y).
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// Lifetime is tracked in VBlank frames (see tick_barriers_frame()).
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struct Barrier {
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BarrierPhase phase = BarrierPhase::Inactive;
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int8_t x = 0;
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int8_t y = 0;
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bool vertical = false;
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uint8_t length = 0;
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uint16_t framesLeft = 0; // Frames remaining in the current phase
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};
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// Evil item (rotten apple or cursed apple) with position and lifetime in game ticks
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struct EvilItem {
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int8_t x = 0;
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int8_t y = 0;
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uint16_t ticksRemaining = 0;
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};
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struct GameState {
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volatile uint16_t ticks = 0;
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volatile uint16_t snakelength = 0;
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volatile uint16_t snakeDirection = 1;
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volatile uint16_t score = 0;
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volatile uint16_t applesEaten = 0;
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bool gameOver = false;
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GameOverReason gameOverReason = GameOverReason::None;
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bool paused = false;
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bool hardMode = false;
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Scene scene = Scene::Menu;
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int menuSelection = 0;
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uint16_t curseTicksRemaining = 0;
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// Fixed-size (no heap) because barriers are touched from both the VBlank
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// and Timer 0 IRQs. Those IRQs don't nest, so no further locking is needed.
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std::array<Barrier, BARRIER_MAX_COUNT> barriers{};
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volatile uint16_t barrierSpawnCooldown = 0; // Frames until the next spawn attempt
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std::deque<std::array<int, 3>> snake;
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std::vector<std::array<int, 2>> apples;
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std::vector<EvilItem> bad_apples;
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std::vector<EvilItem> cursed_apples;
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};
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#endif
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