Erik Lomas / Mbed 2 deprecated 4180lab4

Revenge of the Mouse

Dependencies:   4DGL-uLCD-SE EthernetInterface Game_Synchronizer LCD_fonts MMA8452 SDFileSystem mbed-rtos mbed wave_player

Fork of 2035_Tanks_Shell by ECE2035 Spring 2015 TA

Bullet/bullet.cpp@21:edfeb289b21f, 2015-10-29 (annotated)

Committer:
jford38
Date:
Thu Oct 29 03:56:30 2015 +0000
Revision:
21:edfeb289b21f
Parent:
20:6a58052b0140
Child:
22:3c68eea5a609
Final Version (I hope). Gonna start stripping out the code to make the shell I reckon.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jford38 17:7bc7127782e4 1 #include "uLCD_4DGL.h"
jford38 15:4b27a3a95772 2 #include "bullet.h"
jford38 15:4b27a3a95772 3 #include "game_synchronizer.h"
jford38 20:6a58052b0140 4 #include "misc.h"
jford38 15:4b27a3a95772 5 #include "math.h"
jford38 15:4b27a3a95772 6
jford38 15:4b27a3a95772 7 extern Game_Synchronizer sync;
jford38 15:4b27a3a95772 8
jford38 15:4b27a3a95772 9 Bullet::Bullet(Tank* t) {
jford38 15:4b27a3a95772 10 tank = t;
jford38 15:4b27a3a95772 11 speed = 30;
jford38 15:4b27a3a95772 12 in_flight = false;
jford38 15:4b27a3a95772 13 }
jford38 15:4b27a3a95772 14 void Bullet::shoot(void) {
jford38 15:4b27a3a95772 15 if(in_flight) {return;}
jford38 15:4b27a3a95772 16 time = 0;
jford38 15:4b27a3a95772 17 tank->barrel_end(x0, y0);
jford38 15:4b27a3a95772 18 x = x0; y = y0;
jford38 15:4b27a3a95772 19 vx0 = speed*cos(tank->barrel_theta);
jford38 15:4b27a3a95772 20 vy0 = speed*sin(tank->barrel_theta);
jford38 15:4b27a3a95772 21 in_flight = true;
jford38 15:4b27a3a95772 22 }
jford38 15:4b27a3a95772 23
jford38 21:edfeb289b21f 24 void Bullet::update_position(float dt) {
jford38 21:edfeb289b21f 25 if(!in_flight) { return; }
jford38 15:4b27a3a95772 26 time += dt;
jford38 21:edfeb289b21f 27 x = x0 + vx0*time;
jford38 21:edfeb289b21f 28 y = y0 + vy0*time + 0.5*(-9.81)*time*time;
jford38 21:edfeb289b21f 29 }
jford38 21:edfeb289b21f 30
jford38 21:edfeb289b21f 31 // return codes:
jford38 21:edfeb289b21f 32 // BULLET_NO_COLLISION: no collision
jford38 21:edfeb289b21f 33 // BULLET_OFF_SCREEN: off the side of the screen
jford38 21:edfeb289b21f 34 // Otherwise, returns the color you've hit in 16bpp format.
jford38 21:edfeb289b21f 35
jford38 21:edfeb289b21f 36 int Bullet::time_step(float dt) {
jford38 21:edfeb289b21f 37 if(!in_flight) { return BULLET_NO_COLLISION; }
jford38 21:edfeb289b21f 38 int old_x = x;
jford38 21:edfeb289b21f 39 int old_y = y;
jford38 15:4b27a3a95772 40
jford38 21:edfeb289b21f 41 update_position(dt);
jford38 15:4b27a3a95772 42
jford38 21:edfeb289b21f 43 if(x == old_x && y == old_y) {
jford38 21:edfeb289b21f 44 return BULLET_NO_COLLISION;
jford38 15:4b27a3a95772 45 }
jford38 15:4b27a3a95772 46
jford38 21:edfeb289b21f 47 if(x < 0 || x > 128 || y < 0 || y > 128) {
jford38 15:4b27a3a95772 48 sync.pixel(x, y, SKY_COLOR);
jford38 15:4b27a3a95772 49 in_flight = false;
jford38 21:edfeb289b21f 50 return BULLET_OFF_SCREEN;
jford38 15:4b27a3a95772 51 }
jford38 21:edfeb289b21f 52
jford38 21:edfeb289b21f 53 int col = sync.read_pixel(x, y);
jford38 21:edfeb289b21f 54 if(col != CONVERT_24_TO_16_BPP(SKY_COLOR)) {
jford38 21:edfeb289b21f 55 sync.pixel(old_x, old_y, SKY_COLOR);
jford38 21:edfeb289b21f 56 sync.filled_circle(x, y, 4, SKY_COLOR);
jford38 21:edfeb289b21f 57 in_flight = false;
jford38 21:edfeb289b21f 58 return col;
jford38 21:edfeb289b21f 59 }
jford38 21:edfeb289b21f 60 sync.pixel(old_x, old_y, SKY_COLOR);
jford38 15:4b27a3a95772 61 sync.pixel(x, y, BLACK);
jford38 21:edfeb289b21f 62 return BULLET_NO_COLLISION;
jford38 21:edfeb289b21f 63
jford38 21:edfeb289b21f 64 }