bullet.cpp

00001 #include "uLCD_4DGL.h"
00002 #include "bullet.h"
00003 #include "game_synchronizer.h"
00004 #include "globals.h"
00005 #include "math.h"
00006 #include "SDFileSystem.h"
00007 #include "wave_player.h"
00008 #include "playSound.h"
00009 
00010 extern Game_Synchronizer sync;
00011 float et = 0;
00012 int pixelcolor;
00013 //int bouncy
00014 
00015 // Initialize the bullet. Don't have to do much here.
00016 // Keep a pointer to this bullet's tank.
00017 // Set the speed, and default the bullet to not in_flight.
00018 Bullet::Bullet(Tank* t) {
00019     tank = t;
00020     speed = 0;
00021     in_flight = false;
00022 }
00023 //Bullet::Bouncy(Tank* t) {
00024     //tank=t;
00025     //speed=0;
00026     //in_flight=false;
00027 //}
00028 // If in_flight, do nothing. Otherwise,
00029 // set the in_flight flag, and initialize values needed for
00030 // the trajectory calculations. (x0, y0), (vx0, vy0), time
00031 // Hint: tank->barrel_end(...) is useful here.
00032 void Bullet::shoot(void) {
00033     if (in_flight==false){
00034         in_flight = true;
00035         tank->barrel_end(&x0,&y0);
00036         vx0=cos(tank->barrel_theta)*speed;
00037         vy0=sin(tank->barrel_theta)*speed;
00038         x=x0;
00039         y=y0;
00040         sync.filled_circle(x,y,2,YELLOW);
00041         sync.filled_circle(x,y,1,ORANGE);
00042         wait(.5);
00043         sync.filled_circle(x,y,2,SKY_COLOR);
00044         sync.filled_circle(x,y,1,BLT_COLOR);
00045     }
00046 }
00047 
00048 // If the bullet is in flight, calculate its new position
00049 // after a time delta dt.
00050 void Bullet::update_position(float dt) {
00051     if (in_flight == true){
00052         x=floor(x0+(vx0*dt));
00053         y=floor(y0+(vy0*dt)-(4.9*dt*dt));
00054         sync.filled_circle(x,y,1,BLT_COLOR);
00055     }
00056 }
00057 
00058 int Bullet::time_step(float dt) {
00059     // If the bullet hasn't hit anything, 
00060     // redraw the bullet at its new location. 
00061     
00062     if (in_flight == true){
00063         sync.filled_circle(x,y,1,SKY_COLOR);
00064         et += dt;
00065         update_position(et);
00066     
00067     // If it has hit something (obstacle, tank, edge of the screen), 
00068     // set the in_flight flag back to false, explode the nearby area,
00069     // and return one of the following codes.
00070        //if(bouncy==1){
00071            //if(x>128 || y<0 || y>128){
00072                
00073            //}
00074            //}    
00075        //else{
00076        if(x>128 || y<0 || y>128){
00077           in_flight=false;
00078           et=0;
00079           return BULLET_OFF_SCREEN;
00080     }
00081     //}
00082     
00083     else{
00084     pixelcolor=sync.read_pixel(x,y);
00085     
00086     if(sync.pixel_eq(pixelcolor,BLACK)==1){
00087         sync.filled_circle(x,y,6, ORANGE);
00088         sync.filled_circle(x,y,4, YELLOW);
00089         sync.filled_circle(x,y,2, TANK_RED);
00090         playSound("/sd/wavfiles/Hit.wav");
00091         sync.update();
00092         sync.filled_circle(x,y,5, ORANGE);
00093         sync.filled_circle(x,y,3, TANK_RED);
00094         playSound("/sd/wavfiles/Hit.wav");
00095         sync.update();
00096         sync.filled_circle(x,y,6, SKY_COLOR);
00097         in_flight=false;
00098         et=0;
00099         return pixelcolor;
00100  
00101  }
00102  if(sync.pixel_eq(pixelcolor,TREE)==1){
00103         sync.filled_circle(x,y,6, ORANGE);
00104         sync.filled_circle(x,y,4, YELLOW);
00105         sync.filled_circle(x,y,2, TANK_RED);
00106         playSound("/sd/wavfiles/Hit.wav");
00107         sync.update();
00108         sync.filled_circle(x,y,5, ORANGE);
00109         sync.filled_circle(x,y,3, TANK_RED);
00110         playSound("/sd/wavfiles/Hit.wav");
00111         sync.update();
00112         sync.filled_circle(x,y,6, SKY_COLOR);
00113         in_flight=false;
00114         et=0;
00115         return pixelcolor;
00116  }
00117  if(sync.pixel_eq(pixelcolor,GND_COLOR)==1){
00118         sync.filled_circle(x,y,6, ORANGE);
00119         sync.filled_circle(x,y,4, YELLOW);
00120         sync.filled_circle(x,y,2, TANK_RED);
00121         playSound("/sd/wavfiles/Hit.wav");
00122         sync.update();
00123         sync.filled_circle(x,y,5, ORANGE);
00124         sync.filled_circle(x,y,3, TANK_RED);
00125         playSound("/sd/wavfiles/Hit.wav");
00126         sync.update();
00127         sync.filled_circle(x,y,6, SKY_COLOR);
00128         sync.filled_circle(x,y,6,BROWN);
00129         sync.filled_circle(x,y+2,6, SKY_COLOR);
00130         in_flight=false;
00131         et=0;
00132         return pixelcolor;
00133  }
00134  if(sync.pixel_eq(pixelcolor,WHITE)==1){
00135         sync.filled_circle(x,y,6, ORANGE);
00136         sync.filled_circle(x,y,4, YELLOW);
00137         sync.filled_circle(x,y,2, TANK_RED);
00138         playSound("/sd/wavfiles/Hit.wav");
00139         sync.update();
00140         sync.filled_circle(x,y,5, ORANGE);
00141         sync.filled_circle(x,y,3, TANK_RED);
00142         playSound("/sd/wavfiles/Hit.wav");
00143         sync.update();
00144         sync.filled_circle(x,y,6, SKY_COLOR);
00145         in_flight=false;
00146         et=0;
00147         return pixelcolor;
00148  }
00149  if(sync.pixel_eq(pixelcolor,TANK_RED)==1){
00150         sync.filled_circle(x,y,6, ORANGE);
00151         sync.filled_circle(x,y,4, YELLOW);
00152         sync.filled_circle(x,y,2, TANK_RED);
00153         playSound("/sd/wavfiles/Hit.wav");
00154         sync.update();
00155         sync.filled_circle(x,y,5, ORANGE);
00156         sync.filled_circle(x,y,3, TANK_RED);
00157         playSound("/sd/wavfiles/Hit.wav");
00158         sync.update();
00159         sync.filled_circle(x,y,6, SKY_COLOR);
00160         in_flight=false;
00161         et=0;
00162         return pixelcolor;
00163  }
00164  if(sync.pixel_eq(pixelcolor,TANK_BLUE)==1){
00165         sync.filled_circle(x,y,6, ORANGE);
00166         sync.filled_circle(x,y,4, YELLOW);
00167         sync.filled_circle(x,y,2, TANK_RED);
00168         playSound("/sd/wavfiles/Hit.wav");
00169         sync.update();
00170         sync.filled_circle(x,y,5, ORANGE);
00171         sync.filled_circle(x,y,3, TANK_RED);
00172         playSound("/sd/wavfiles/Hit.wav");
00173         sync.update();
00174         sync.filled_circle(x,y,6, SKY_COLOR);
00175         in_flight=false;
00176         et=0;
00177         return pixelcolor;
00178  }
00179  //if(sync.pixel_eq(pixelcolor,BARREL_GREY)==1){
00180         //sync.filled_circle(x,y,6, ORANGE);
00181         //sync.filled_circle(x,y,4, YELLOW);
00182         //sync.filled_circle(x,y,2, TANK_RED);
00183         //wait(.15);
00184         //sync.update();
00185         //sync.filled_circle(x,y,5, ORANGE);
00186         //sync.filled_circle(x,y,3, TANK_RED);
00187         //wait(.15);
00188         //sync.update();
00189         //sync.filled_circle(x,y,6, SKY_COLOR);
00190         //in_flight=false;
00191         //et=0;
00192         //return pixelcolor;
00193  }
00194  
00195  
00196  }   
00197     // return codes:
00198     //      BULLET_NO_COLLISION: no collision
00199     //      BULLET_OFF_SCREEN:   off the side of the screen
00200     //      Otherwise, return the color you've hit in 16bpp format. 
00201     return BULLET_NO_COLLISION;
00202 }