Matthew Riley
For Nikhil
Dependencies: 4DGL-uLCD-SE EthernetInterface Game_Synchronizer MMA8452 SDFileSystem mbed-rtos mbed wave_player
Fork of
2035_Tanks_Shell
by 
ECE2035 Spring 2015 TA
Bullet/bullet.h@27:bd55ab4d137c, 2015-10-30 (annotated)
- Committer:
- jford38
- Date:
- Fri Oct 30 11:08:31 2015 +0000
- Revision:
- 27:bd55ab4d137c
- Parent:
- 21:edfeb289b21f
Added a folder for sound. Clarified the role of globals.h
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| jford38 | 15:4b27a3a95772 | 1 | #ifndef BULLET_H__ |
| jford38 | 15:4b27a3a95772 | 2 | #define BULLET_H__ |
| jford38 | 15:4b27a3a95772 | 3 | |
| jford38 | 15:4b27a3a95772 | 4 | #include "tank.h" |
| jford38 | 15:4b27a3a95772 | 5 | |
| jford38 | 21:edfeb289b21f | 6 | #define BULLET_NO_COLLISION -1 |
| jford38 | 21:edfeb289b21f | 7 | #define BULLET_OFF_SCREEN -2 |
| jford38 | 21:edfeb289b21f | 8 | |
| jford38 | 15:4b27a3a95772 | 9 | class Bullet{ |
| jford38 | 15:4b27a3a95772 | 10 | public: |
| jford38 | 21:edfeb289b21f | 11 | |
| jford38 | 21:edfeb289b21f | 12 | // (x0, y0) is the position of the bullet at the start of its trajectory. |
| jford38 | 21:edfeb289b21f | 13 | int x0, y0; |
| jford38 | 21:edfeb289b21f | 14 | |
| jford38 | 21:edfeb289b21f | 15 | // The components of the bullet's initial velocity. |
| jford38 | 21:edfeb289b21f | 16 | float vx0, vy0; |
| jford38 | 21:edfeb289b21f | 17 | |
| jford38 | 21:edfeb289b21f | 18 | // The current position of the bullet. |
| jford38 | 21:edfeb289b21f | 19 | int x, y; |
| jford38 | 21:edfeb289b21f | 20 | |
| jford38 | 21:edfeb289b21f | 21 | // How fast is the bullet? |
| jford38 | 15:4b27a3a95772 | 22 | int speed; |
| jford38 | 21:edfeb289b21f | 23 | |
| jford38 | 21:edfeb289b21f | 24 | // Keep track of the time since the bullet was shot. |
| jford38 | 15:4b27a3a95772 | 25 | float time; |
| jford38 | 21:edfeb289b21f | 26 | |
| jford38 | 21:edfeb289b21f | 27 | // Keep track of whether the bullet is currently in flight. |
| jford38 | 21:edfeb289b21f | 28 | // If it is in_flight, update its position. Otherwise, ignore it. |
| jford38 | 21:edfeb289b21f | 29 | // Set in_flight when the bullet is shot. |
| jford38 | 21:edfeb289b21f | 30 | // Reset in_flight when the bullet hits something. |
| jford38 | 15:4b27a3a95772 | 31 | bool in_flight; |
| jford38 | 15:4b27a3a95772 | 32 | |
| jford38 | 21:edfeb289b21f | 33 | // Keep a pointer to the tank that shot this bullet. You'll need |
| jford38 | 21:edfeb289b21f | 34 | // it to access information about the tank. |
| jford38 | 15:4b27a3a95772 | 35 | Tank* tank; |
| jford38 | 15:4b27a3a95772 | 36 | |
| jford38 | 21:edfeb289b21f | 37 | // Create a bullet! |
| jford38 | 15:4b27a3a95772 | 38 | Bullet(Tank* t); |
| jford38 | 21:edfeb289b21f | 39 | |
| jford38 | 21:edfeb289b21f | 40 | // Shoot the bullet! |
| jford38 | 15:4b27a3a95772 | 41 | void shoot(void); |
| jford38 | 21:edfeb289b21f | 42 | |
| jford38 | 21:edfeb289b21f | 43 | // given a time delta, calculate the new (x, y) coords of the bullet. |
| jford38 | 21:edfeb289b21f | 44 | void update_position(float dt); |
| jford38 | 21:edfeb289b21f | 45 | |
| jford38 | 21:edfeb289b21f | 46 | // Once per frame, plug in the time since the last frame. |
| jford38 | 21:edfeb289b21f | 47 | // Clear the old bullet and redraw it in the new place. |
| jford38 | 21:edfeb289b21f | 48 | // Do collision detection here. Return a code describing what has |
| jford38 | 21:edfeb289b21f | 49 | // (or hasn't) been hit. |
| jford38 | 15:4b27a3a95772 | 50 | int time_step(float dt); |
| jford38 | 15:4b27a3a95772 | 51 | }; |
| jford38 | 15:4b27a3a95772 | 52 | |
| jford38 | 15:4b27a3a95772 | 53 | #endif |