dos-vga-arena-shooter-game/movement.h

#ifndef __MOVEMENT_H__
#define __MOVEMENT_H__

#include "system/keyboard.h"

struct RabbitPosition {
  int rabbitPosition[2];
  int oldRabbitPosition[2];
  int rabbitLimits[2][2];
  signed char rabbitVelocity[2];

  int mousePosition[2];
  int oldMousePosition[2];

  int mouseDotPosition[2];
  int oldMouseDotPosition[2];

  int mouseAngle;
};

#define WEAPON_TYPE_SINGLE_SHOT_GUN (0)
#define WEAPON_TYPE_SPREAD_SHOT_GUN (1)

struct RabbitWeaponry {
  char cooldown;
  char currentWeapon;
  int currentWeaponRemainingRounds;
};

#define POWERUP_TYPE_SHOTGUN (0)
#define POWERUP_TYPE_SHIELD_KILLER (1)

struct PlayerPowerup {
  int x, y;
  int cooldown;
  char isActive;
  char willBeInactive;
  char type;
};

struct BulletPosition {
  // 1 if the bullet should be rendered
  char isActive;
  // sweep up the bullet from the display
  char willBeInactive;
  int x, y;
  int oldX, oldY;

  int wallCooldown;

  signed int velocityXSteps[2], velocityYSteps[2];
  int velocityStep;
  int angle;
};

struct EnemyPosition {
  char isActive;

  char willBeInactive;
  char wasKilled;

  char hitPoints;
  char hasLeftGate;
  char gateExitedFrom;

  int enemyPosition[2];
  int oldEnemyPosition[2];

  int enemyMoveDelayStep;
  int enemyFireDelayStep;
};

void calculateTargetAngle(struct RabbitPosition*, struct MouseStatus*);
void captureAndLimitMousePosition(struct RabbitPosition*, struct MouseStatus*);
void handleRabbitMovement(struct RabbitPosition*, struct KeyboardKeydownState*);
void handleEnemyMovement(struct EnemyPosition[], struct RabbitPosition*);

#endif