Byron Pritchett Jr / Mbed 2 deprecated MC_Summer_shell

Missile Command Game

Dependencies:   mbed wave_player 4DGL-uLCD-SE MMA8452

main.cpp@1:5724f2947554, 2021-05-11 (annotated)

Committer:
lwills
Date:
Tue May 11 18:26:14 2021 +0000
Revision:
1:5724f2947554
Parent:
0:09aa1ecd6c39
Child:
2:a09accf52491
Updated comments

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lwills 0:09aa1ecd6c39 1 //=================================================================
lwills 0:09aa1ecd6c39 2 // The main program file.
lwills 0:09aa1ecd6c39 3 //
lwills 1:5724f2947554 4 // Copyright 2021 Georgia Tech. All rights reserved.
lwills 0:09aa1ecd6c39 5 // The materials provided by the instructor in this course are for
lwills 0:09aa1ecd6c39 6 // the use of the students currently enrolled in the course.
lwills 0:09aa1ecd6c39 7 // Copyrighted course materials may not be further disseminated.
lwills 0:09aa1ecd6c39 8 // This file must not be made publicly available anywhere.
lwills 0:09aa1ecd6c39 9 //==================================================================
lwills 0:09aa1ecd6c39 10
lwills 0:09aa1ecd6c39 11 // External libs
lwills 0:09aa1ecd6c39 12 #include <stdlib.h>
lwills 0:09aa1ecd6c39 13
lwills 0:09aa1ecd6c39 14 // Project includes
lwills 0:09aa1ecd6c39 15 #include "globals.h"
lwills 0:09aa1ecd6c39 16 #include "hardware.h"
lwills 0:09aa1ecd6c39 17 #include "city_landscape_public.h"
lwills 0:09aa1ecd6c39 18 #include "missile_public.h"
lwills 0:09aa1ecd6c39 19 #include "player_public.h"
lwills 0:09aa1ecd6c39 20
lwills 0:09aa1ecd6c39 21 #define CITY_HIT_MARGIN 1
lwills 0:09aa1ecd6c39 22 #define CITY_UPPER_BOUND (SIZE_Y-(LANDSCAPE_HEIGHT+MAX_BUILDING_HEIGHT))
lwills 0:09aa1ecd6c39 23
lwills 0:09aa1ecd6c39 24 int num_city_g = 4;
lwills 0:09aa1ecd6c39 25 // function prototypes
lwills 0:09aa1ecd6c39 26 void set_random_seed(Timer);
lwills 0:09aa1ecd6c39 27 int city_landscape_update(void);
lwills 0:09aa1ecd6c39 28 int was_player_hit(void);
lwills 0:09aa1ecd6c39 29 void missile_contact(void);
lwills 0:09aa1ecd6c39 30
lwills 0:09aa1ecd6c39 31 int main()
lwills 0:09aa1ecd6c39 32 {
lwills 0:09aa1ecd6c39 33 GameInputs inputs;
lwills 0:09aa1ecd6c39 34 // First things first: initialize hardware
lwills 0:09aa1ecd6c39 35 ASSERT_P(hardware_init() == ERROR_NONE, "Hardware init failed!");
lwills 0:09aa1ecd6c39 36 pc.printf("Program Starting");
lwills 0:09aa1ecd6c39 37
lwills 0:09aa1ecd6c39 38 // Game state variables
lwills 0:09aa1ecd6c39 39 int num_remain_city; // number of cities currently on the landscape
lwills 0:09aa1ecd6c39 40 int player_alive; // 1 if alive, 0 if hit
lwills 0:09aa1ecd6c39 41
lwills 0:09aa1ecd6c39 42 testDLL();
lwills 0:09aa1ecd6c39 43 // Timer to measure game update speed (secondarily used to generate random seed)
lwills 0:09aa1ecd6c39 44 Timer t;
lwills 0:09aa1ecd6c39 45 int dt; // delta time
lwills 0:09aa1ecd6c39 46 set_random_seed(t); // Already implemented.
lwills 0:09aa1ecd6c39 47
lwills 0:09aa1ecd6c39 48 //Initialization functions (already implemented)
lwills 0:09aa1ecd6c39 49 city_landscape_init(num_city_g);
lwills 0:09aa1ecd6c39 50 missile_init();
lwills 0:09aa1ecd6c39 51 player_init();
lwills 0:09aa1ecd6c39 52 pc.printf("Initialization complete\n");
lwills 0:09aa1ecd6c39 53
lwills 0:09aa1ecd6c39 54 while(1)
lwills 0:09aa1ecd6c39 55 {
lwills 0:09aa1ecd6c39 56 t.start();
lwills 0:09aa1ecd6c39 57 // Generate new missiles and draw all active missiles at current
lwills 0:09aa1ecd6c39 58 // positions. (Already implemented.)
lwills 0:09aa1ecd6c39 59 missile_generator();
lwills 0:09aa1ecd6c39 60
lwills 0:09aa1ecd6c39 61 // Draw all active anti-missiles (aka player missiles) at current
lwills 0:09aa1ecd6c39 62 // positions. (Already implemented.)
lwills 0:09aa1ecd6c39 63 player_missile_draw();
lwills 0:09aa1ecd6c39 64
lwills 0:09aa1ecd6c39 65 // Detect missile collisions with city/land and update status.
lwills 0:09aa1ecd6c39 66 // You need to implement this (see specification below).
lwills 0:09aa1ecd6c39 67 num_remain_city = city_landscape_update();
lwills 0:09aa1ecd6c39 68
lwills 0:09aa1ecd6c39 69 // Detect missile collision with player aircraft.
lwills 0:09aa1ecd6c39 70 // You need to implement this (see specification below).
lwills 0:09aa1ecd6c39 71 player_alive = was_player_hit(); //returns 0 if player is hit; else 1
lwills 0:09aa1ecd6c39 72
lwills 0:09aa1ecd6c39 73 // Detect missile collisions with player anti-missiles.
lwills 0:09aa1ecd6c39 74 // You need to implement this (see specification below).
lwills 0:09aa1ecd6c39 75 missile_contact();
lwills 0:09aa1ecd6c39 76
lwills 0:09aa1ecd6c39 77 // You must complete the implementation of this function in hardware.cpp:
lwills 0:09aa1ecd6c39 78 inputs = read_inputs();
lwills 0:09aa1ecd6c39 79
lwills 0:09aa1ecd6c39 80 // You must write the code to dispatch to the correct action (e.g.,
lwills 0:09aa1ecd6c39 81 // player_moveLeft/Right, player_fire, etc.) based on the inputs read.
lwills 0:09aa1ecd6c39 82 // You must also implement player_moveLeft/moveRight/fire (see player
lwills 0:09aa1ecd6c39 83 // module).
lwills 0:09aa1ecd6c39 84
lwills 0:09aa1ecd6c39 85
lwills 0:09aa1ecd6c39 86 // You must write code to detect and implement game over.
lwills 0:09aa1ecd6c39 87 if (player_alive) break; // replace this line
lwills 0:09aa1ecd6c39 88
lwills 0:09aa1ecd6c39 89 // Compute update time to control timing of the game loop.
lwills 0:09aa1ecd6c39 90 // (Already implemented... you're welcome.)
lwills 0:09aa1ecd6c39 91 t.stop();
lwills 0:09aa1ecd6c39 92 dt = t.read_ms();
lwills 0:09aa1ecd6c39 93 if (dt < 100) wait_ms(100 - dt);
lwills 0:09aa1ecd6c39 94 }
lwills 0:09aa1ecd6c39 95 pc.printf("out of main loop\n");
lwills 0:09aa1ecd6c39 96
lwills 0:09aa1ecd6c39 97 // You must write code to free up any dynamically allocated objects such
lwills 0:09aa1ecd6c39 98 // as lists of missiles (hint: destroyList can be used for doubly linked
lwills 0:09aa1ecd6c39 99 // lists).
lwills 0:09aa1ecd6c39 100
lwills 0:09aa1ecd6c39 101 return 0;
lwills 0:09aa1ecd6c39 102 }
lwills 0:09aa1ecd6c39 103
lwills 0:09aa1ecd6c39 104 /** Detect whether any missile has hit a city and if so, call
lwills 0:09aa1ecd6c39 105 city_demolish (hint: city_get_info may be useful).
lwills 0:09aa1ecd6c39 106 Also, if any missile has hit a city or the landscape,
lwills 0:09aa1ecd6c39 107 mark the missile's status as MISSILE_EXPLODED
lwills 0:09aa1ecd6c39 108 which will cue the missile's deletion and erasure from the screen
lwills 0:09aa1ecd6c39 109 on the next missile_generator call.
lwills 0:09aa1ecd6c39 110 @return Number of remaining cities.
lwills 0:09aa1ecd6c39 111 */
lwills 0:09aa1ecd6c39 112 int city_landscape_update(void){
lwills 0:09aa1ecd6c39 113 // Complete this function.
lwills 0:09aa1ecd6c39 114 return num_city_g;
lwills 0:09aa1ecd6c39 115 }
lwills 0:09aa1ecd6c39 116
lwills 0:09aa1ecd6c39 117 /** Detect whether any missile has hit the player aircraft and if so, call
lwills 0:09aa1ecd6c39 118 player_destroy (hint: player_get_info may be useful) and mark the
lwills 0:09aa1ecd6c39 119 missile's status as MISSILE_EXPLODED which will cue the missile's deletion
lwills 0:09aa1ecd6c39 120 and erasure from the screen on the next missile_generator call.
lwills 0:09aa1ecd6c39 121 @return 1 if the player aircraft was hit and 0 otherwise.
lwills 0:09aa1ecd6c39 122 */
lwills 0:09aa1ecd6c39 123 int was_player_hit(){
lwills 0:09aa1ecd6c39 124 return 0;
lwills 0:09aa1ecd6c39 125 }
lwills 0:09aa1ecd6c39 126
lwills 0:09aa1ecd6c39 127 /** Detect whether any missile has hit any player missile and if so,
lwills 0:09aa1ecd6c39 128 mark the status of both the missile and the player missile as
lwills 0:09aa1ecd6c39 129 MISSILE_EXPLODED which will cue the missile's deletion and erasure
lwills 0:09aa1ecd6c39 130 from the screen on the next missile_generator call.
lwills 0:09aa1ecd6c39 131 */
lwills 0:09aa1ecd6c39 132 void missile_contact(void) {
lwills 0:09aa1ecd6c39 133 }
lwills 0:09aa1ecd6c39 134
lwills 0:09aa1ecd6c39 135 /* We need a random number generator (e.g., in missile_create to generate
lwills 0:09aa1ecd6c39 136 random positions for the missiles to start, making the game different
lwills 0:09aa1ecd6c39 137 every time). C provides a pseudo random number generator (in stdlib) but
lwills 0:09aa1ecd6c39 138 it requires that we give it a different seed for each new game. A common
lwills 0:09aa1ecd6c39 139 way to do this is to sample a clock and use the time as the seed. However
lwills 0:09aa1ecd6c39 140 if we do this by starting a simple Timer t when the mbed starts running the
lwills 0:09aa1ecd6c39 141 program and then sample it (t.read_ms), we will always get exactly the same
lwills 0:09aa1ecd6c39 142 time sample -- t.read_ms will always occur at the same time in the program's
lwills 0:09aa1ecd6c39 143 execution. We introduce variability in when we sample the time by waiting
lwills 0:09aa1ecd6c39 144 for the user to push any button before we call t.read_ms.
lwills 0:09aa1ecd6c39 145 */
lwills 0:09aa1ecd6c39 146 void set_random_seed(Timer t) {
lwills 0:09aa1ecd6c39 147 GameInputs inputs;
lwills 0:09aa1ecd6c39 148 t.start();
lwills 0:09aa1ecd6c39 149 uLCD.printf("Push any button to start.\n");
lwills 0:09aa1ecd6c39 150 while(1){
lwills 0:09aa1ecd6c39 151 inputs = read_inputs();
lwills 0:09aa1ecd6c39 152 if (inputs.b1 || inputs.b2 || inputs.b3) break;
lwills 0:09aa1ecd6c39 153 }
lwills 0:09aa1ecd6c39 154 uLCD.cls();
lwills 0:09aa1ecd6c39 155 t.stop();
lwills 0:09aa1ecd6c39 156 int seed = t.read_ms();
lwills 0:09aa1ecd6c39 157 srand(seed);
lwills 0:09aa1ecd6c39 158 }
lwills 0:09aa1ecd6c39 159