/******************************************/ /* Elaine Chan */ /* */ /* HW6 */ /* CSC 142 */ /* email address: */ /* er-chan@yahoo.com */ /* */ /* Space Invaders */ /* */ /******************************************/ #include "gp142.h" #include #include #include /* * is included so the current time can be accessed * to initialize the random number generator. */ /* Logical constants */ #define TRUE 1 #define FALSE 0 /* * For many of the GP142 functions, a line width of * zero means to fill the shape being drawn. The * constant FILL is used in function calls when a solid * shape is desired. */ #define FILL 0 /* * Symbolic constants. Change as needed. */ /* Menu buttons: */ /* Top-left coordinates of button palette */ #define MENU_TOP (GP142_YMAX - 5) #define MENU_LEFT (-GP142_XMAX + 5) /* Height and width of buttons in pixels */ #define BUTTON_HEIGHT 25 #define BUTTON_WIDTH 75 /* Number of buttons */ #define NUM_BUTTONS 3 /* Mouse click in some button */ #define BUTTON_CLICK 1 /* Mouse click elsewhere */ #define OTHER_CLICK 0 /* Height and width of ship */ #define SHIP_HEIGHT 24 #define SHIP_WIDTH 18 /* Position and size of video screen */ #define BOARDEDGE 50 #define SCREEN_X (-GP142_XMAX+2*BOARDEDGE) #define SCREEN_Y (-GP142_YMAX+BOARDEDGE) #define SCREEN_WIDTH (GP142_XMAX + GP142_XMAX - 3*BOARDEDGE) #define SCREEN_HEIGHT (GP142_YMAX + GP142_YMAX - 2*BOARDEDGE) #define SHIP_LOCATION (-GP142_YMAX+BOARDEDGE) + 15 /* Size of alien ships and time between their movements */ #define ALIEN_WIDTH 10 #define TIME_PER_ATTACK 10 /* Aliens start off this many levels above the ship */ #define DIST_TO_SHIP 7 /* Number of stars and aliens on the screen */ #define NUMBER_OF_STARS 100 #define NUMBER_OF_ALIENS 10 /* Each alien should be represented as a structure "space_alien" */ typedef struct{int alive;int color; int hits; int x; int y;}space_alien; /* new (alive=0 dead) */ /***************************************************************************** FUNCTION PROTOTYPES *****************************************************************************/ /* Initialize random number generator. */ void initialize_random_numbers(); /* create and draw the outer space background */ void create_background(GP142_point background[]); void draw_background(GP142_point background[]); /* Draw the buttons */ void draw_buttons(); /* instructions on top of screen */ void draw_instructions(); /* new */ /* Return kind of mouse click (in a button, etc.) */ int classify_mouse_click(int mouse_x, int mouse_y); /* Process button click at location x, y. The mouse only matters */ /* when clicking on buttons. */ void handle_button(int x, int y, int *ship_speed, int *quit); /* Process keyboard press which moves ship or fires ship */ //void handle_key(char key_pressed, int *ship_direction, int *shot); void handle_key(char key_pressed, int *ship_direction, int shot[3]); /*new */ /* Update ship's x, y coordinates, given current x, y */ /* location, direction (+1 or -1), and speed in pixels per tick. */ void move_ship(int *x, int *y, int *direction, int speed); /* Draw all aliens given the array which keeps track of space aliens */ void draw_aliens( space_alien aliens[]); /* new */ /* Draw the ship at position x, y with the given color */ void draw_ship(int x, int y, int color); /* Display error message if internal error is detected. */ void something_is_wrong (void); /* Initializes the array of space aliens */ void create_aliens( space_alien aliens[]); /* new */ /* Moves the aliens down toward the ship based on the timer */ void update_aliens(space_alien aliens[], int *timer, int *ship_x); /* Causes the ship to shoot */ void fire_shot(space_alien aliens[], int *car_x); /* Causes the ship to shoot 3 aliens at once */ void fire_shot3in1(space_alien aliens[], int *car_x); /***************************************************************************** MAIN *****************************************************************************/ /* * Main program contents: * - Major program variables that persist throughout execution * - Event loop that processes GP142 events until the user quits, * and updates variables and redraws the window as needed. */ int main(void) { /* Event handling and buttons: */ int quit; /* = "user has selected quit" */ int event; /* the most recent GP142 event */ char key_pressed; /* last keyboard character from key event */ int mouse_x, mouse_y; /* x and y coordinates of latest mouse event*/ int click_kind; /* kind of mouse click (button, etc.) */ /* Information about the ship */ int ship_x, ship_y; /* current position of the ship */ int ship_direction; /* current direction: +1=right, -1=left */ int ship_color; /* color of the ship */ int ship_speed; /* speed in pixels per tick */ int timer = 0; /* Keeps track of how often aliens attack */ //int shot = FALSE; /* Keeps track of if a shot was just fired */ int shot[3]={FALSE,FALSE,FALSE}; /* new for 3 kinds of bullets*/ /* An array of points to keep track of the stars in the background */ GP142_point background[NUMBER_OF_STARS]; /* Stores all the information about all the aliens */ space_alien aliens[NUMBER_OF_ALIENS]; /* new alive=0 dead */ initialize_random_numbers(); /* Initialize graphics package, hide the text window, clear the graphics window */ /* turn logging off, and start animation. */ GP142_open(); GP142_logging(LOG_OFF); GP142_clear(); GP142_show_text(0); GP142_animate(ANI_RUN); /* set initial conditions for the ship */ ship_x = 0; ship_y = SHIP_LOCATION; ship_direction = +1; ship_speed = 7; ship_color = ICE_BLUE; /* Draw background, buttons, ship, and aliens */ create_background(background); draw_background(background); draw_buttons( ); draw_instructions(); create_aliens( aliens); draw_aliens(aliens); draw_ship(ship_x,ship_y,ship_color); /* * Main event loop: * ---- ----- ----- * Wait for the next user action, decode it, and call an * appropriate function to handle it. Repeat until the * user selects quit. */ quit = FALSE; while (!quit) { /* get next event */ event = GP142_await_event(&mouse_x, &mouse_y, &key_pressed); /* perform appropriate action depending on kind of event */ switch (event) { case GP142_QUIT: /* Quit selected */ quit = TRUE; break; case GP142_KBD: /* Key pressed. Determine if the user is trying to move */ /* the ship or shoot from the ship. */ /* Note that scanf CANNOT be used with GP142. */ // handle_key(key_pressed, &ship_direction, &shot); handle_key(key_pressed,&ship_direction,shot); /* new */ break; case GP142_MOUSE: /* Mouse click. Determine if in a menu button */ /* or elsewhere and process accordingly. */ click_kind = classify_mouse_click(mouse_x, mouse_y); if (click_kind == BUTTON_CLICK) { handle_button(mouse_x, mouse_y, &ship_speed, &quit); } else { /* the only mouse clicks that do anything are the buttons */ } break; case GP142_PERIODIC: /* Timer interval event. Update everything */ /* that needs to change as time advances. */ update_aliens(aliens, &timer,&ship_x); move_ship(&ship_x, &ship_y, &ship_direction, ship_speed); timer++; break; default: /* unknown event */ break; } /*end switch */ /* Redraw everything */ draw_buttons(); draw_instructions(); draw_background(background); draw_ship(ship_x,ship_y,ship_color); draw_aliens( aliens); // if (shot) { // fire_shot(aliens, &ship_x); /* If the user fired a shot... */ // shot = FALSE; } if (shot[0]) { fire_shot(aliens, &ship_x); /* If the user fired a shot... */ shot[0] = FALSE; } if(shot[1]){ fire_shot3in1(aliens,&ship_x); /* hits three aliens at once */ shot[1] =FALSE; } } /* end event loop */ /* Termination: shut down graphics window and exit */ GP142_close(); return 0; } /*end main */ /***************************************************************************** BACKGROUND LANDSCAPE *****************************************************************************/ /* Positions the stars randomly in outer space */ void create_background(GP142_point background[]) { int i; int star_x, star_y; for (i = 0; i < NUMBER_OF_STARS; i++) { star_x = -GP142_XMAX+2*BOARDEDGE + (rand() % (GP142_XMAX-BOARDEDGE+GP142_XMAX+2*BOARDEDGE)); star_y = -GP142_YMAX+BOARDEDGE + (rand() % (GP142_YMAX-BOARDEDGE+GP142_YMAX+BOARDEDGE)); background[i].x = star_x; background[i].y = star_y; } } /* Draw the outer space looking background */ void draw_background(GP142_point background[]) { int i; GP142_rectangleXY(BLACK, SCREEN_X, SCREEN_Y, SCREEN_X+SCREEN_WIDTH, SCREEN_Y+SCREEN_HEIGHT, FILL); for (i = 0; i < NUMBER_OF_STARS; i++) { GP142_rectangleXY(WHITE, background[i].x, background[i].y, background[i].x+1, background[i].y+1, FILL); } } /***************************************************************************** BUTTONS AND MOUSE CLICKS *****************************************************************************/ /* Draws the buttons */ void draw_buttons( ) { int i; int text_offset = MENU_LEFT+10; /* offset of button text in button */ int font_size = 12; /* size of button text */ /* draw rectangles for each button */ for(i = 0; i < NUM_BUTTONS; i++) { GP142_rectangleXY(BLACK, MENU_LEFT, MENU_TOP - i * BUTTON_HEIGHT, MENU_LEFT + BUTTON_WIDTH, MENU_TOP - (i + 1)*BUTTON_HEIGHT, 1); } /* display button text */ i = MENU_TOP - (BUTTON_HEIGHT/2) - (font_size/2); GP142_printfXY(BLACK, text_offset, i, font_size, "Faster"); i -= BUTTON_HEIGHT; GP142_printfXY(BLACK, text_offset, i, font_size, "Slower"); i -= BUTTON_HEIGHT; GP142_printfXY(BLACK, text_offset, i, font_size, "Quit"); } /* Classify mouse click at (mouse_x,mouse_y) and return kind */ int classify_mouse_click(int mouse_x, int mouse_y) { if ((mouse_x > MENU_LEFT) && (mouse_x < MENU_LEFT + BUTTON_WIDTH) && (mouse_y < MENU_TOP) && (mouse_y > (MENU_TOP - NUM_BUTTONS*BUTTON_HEIGHT))) return BUTTON_CLICK; else return OTHER_CLICK; } /* Process button click at location x, y. Buttons can only */ /* change the ship's speed or quit the game. */ void handle_button(int x, int y, int *ship_speed, int *quit) { int buttonNum; /* number of selected button */ /* Complain if x coordinate couldn't be inside a button */ if (x < MENU_LEFT || x > MENU_LEFT + BUTTON_WIDTH) { something_is_wrong(); return; } /* Convert y coordinate to button number from top. */ buttonNum = (MENU_TOP - y)/BUTTON_HEIGHT; switch(buttonNum) { case 0: /* speed up */ *ship_speed = *ship_speed + 1; break; case 1: /* slow down */ *ship_speed = *ship_speed - 1; if (*ship_speed < 0) *ship_speed = 0; break; case 2: /* exit the game */ *quit = TRUE; break; default: /*Bad news if this is ever reached! */ something_is_wrong(); break; } } /***************************************************************************** KEYBOARD WAS PRESSED *****************************************************************************/ /* The ship can shoot or move right or left depending on a key stroke */ //void handle_key(char key_pressed, int *ship_direction, int *shot) void handle_key(char key_pressed, int *ship_direction, int shot[3]) /* new */ { switch(key_pressed) { case ' ': /* fire a shot */ // *shot = TRUE; shot[0] = TRUE; break; case 'f' : /*fire the three in one weapon*/ shot[1]=TRUE; break; /* make new case for another weapon */ case '<' : case ',' : *ship_direction=-1; break; case '>' : case '.' : *ship_direction=+1; break; default: break; } } /***************************************************************************** THE SHIP AND ANY SHOT IT FIRES *****************************************************************************/ /* When the user wants to fire a shot */ void fire_shot(space_alien aliens[], int *ship_x) { int i ,j ,k; int increment = (SCREEN_WIDTH)/(NUMBER_OF_ALIENS+1); int start = SCREEN_X + increment; int shot_height = SCREEN_Y + SCREEN_HEIGHT; /* new temporary part */ int originalx, originaly; /*aliens[i].x and y before it goes chaotic */ int x[4],y[4]; /*end initialization for temporary part */ for (i = 0; i < NUMBER_OF_ALIENS; i++) { /* Check if shot was near an alien */ // if (abs(*ship_x - start - i*increment) < 5) //original if(abs( *ship_x - aliens[i].x) < 5) { shot_height = SHIP_LOCATION + 50*DIST_TO_SHIP; if(aliens[i].alive)aliens[i].hits++; GP142_lineXY(YELLOW, *ship_x, SHIP_LOCATION + 3*SHIP_HEIGHT/2, *ship_x, shot_height, FILL); /* should hit 3 aliens at once experimental bomb thrower */ // for(k=0;k<10;k++){ // for(j=0;j<30000;j++){ /* time delay */} // GP142_ovalXY(MAGENTA,*ship_x-k*5,SHIP_LOCATION + 3*SHIP_HEIGHT/2 +35*k -4, // *ship_x + k*5,SHIP_LOCATION+3*SHIP_HEIGHT/2 + 35*k +4,0); // } /* end experimental bomb */ // makes blue crossed lines on aliens for(k=-1;k<2;k++){ for(j=-1;j<2;j++){ GP142_lineXY(ICE_BLUE,aliens[i].x+k*18,aliens[i].y+j*18, aliens[i].x-k*18,aliens[i].y-j*18,0); }/* end of for loop over j */ }/* end of for loop over k */ /* begin new part */ /* save original coordinates of aliens[i] */ originalx=aliens[i].x; originaly=aliens[i].y; /* redefining x[4] and y[4] */ x[0] =originalx-20; y[0]=originaly; x[1]= originalx; y[1]=originaly-10; x[2]=originalx +20; y[2]=originaly; x[3]=originalx; y[3]=originaly +10; /*laser shot makes the alien move chaotically then return to original*/ /*erase previous aliens[i] */ for(k=4;k>0;k--){ for (j=0;j<20000;j++) { /*time delay */} aliens[i].color=BLACK; draw_aliens(aliens); /*new position */ aliens[i].color=YELLOW + i; aliens[i].x=x[k];aliens[i].y=y[k]; draw_aliens(aliens); }/* end of loop over k(reused) */ aliens[i].x=originalx; aliens[i].y=originaly; draw_aliens(aliens); /*end new part */ } /* end of yes if ship hit the alien */ }/*end of for loop over i */ } /* Update ship's x, y coordinates, given current x, y */ /* location, direction (+1 or -1), and speed in pixels per tick, */ void move_ship(int *x, int *y, int *direction, int speed) { int trial_x; /* new value for x coordinate */ /* Move ship. If it moves off the edge, reverse direction */ trial_x = *x + (*direction * speed); if (trial_x < -GP142_XMAX+2*BOARDEDGE + SHIP_WIDTH || trial_x > GP142_XMAX-BOARDEDGE - SHIP_WIDTH) *direction = - (*direction); else *x = trial_x; } /* Draw the ship at location x, y */ void draw_ship(int x, int y, int color) { GP142_rectangleXY(color, x - SHIP_WIDTH/2, y, x + SHIP_WIDTH/2, y + SHIP_HEIGHT, FILL); GP142_triangleXY(color,x - SHIP_WIDTH/2, y + SHIP_HEIGHT, x, y + 3*SHIP_HEIGHT/2, x + SHIP_WIDTH/2, y +SHIP_HEIGHT, FILL); GP142_triangleXY(RED,x - SHIP_WIDTH/2, y, x - SHIP_WIDTH, y, x - SHIP_WIDTH/2, y +SHIP_HEIGHT/2, FILL); GP142_triangleXY(RED,x + SHIP_WIDTH/2, y, x + SHIP_WIDTH, y, x + SHIP_WIDTH/2, y +SHIP_HEIGHT/2, FILL); GP142_printfXY(BLACK, x - SHIP_WIDTH/5, y + 3*SHIP_HEIGHT/4, 10, "1"); GP142_printfXY(BLACK, x - SHIP_WIDTH/5, y + SHIP_HEIGHT/3, 10, "4"); GP142_printfXY(BLACK, x - SHIP_WIDTH/5, y, 10, "2"); } /***************************************************************************** THE ALIENS... *****************************************************************************/ /* Draw all aliens given all the info about an alien in each space alien structure */ void draw_aliens(space_alien aliens[]) { int i, color; int won=1; /* you won */ for (i = 0; i < NUMBER_OF_ALIENS; i++) { if(aliens[i].alive){ color=aliens[i].color; /* An alien consists of a circle with two lines through it */ GP142_circleXY(color,aliens[i].x, aliens[i].y, 5); GP142_lineXY(color, aliens[i].x - ALIEN_WIDTH, aliens[i].y +ALIEN_WIDTH, aliens[i].x + ALIEN_WIDTH ,aliens[i].y - ALIEN_WIDTH , FILL); GP142_lineXY(color,aliens[i].x + ALIEN_WIDTH, aliens[i].y+ALIEN_WIDTH, aliens[i].x - ALIEN_WIDTH ,aliens[i].y - ALIEN_WIDTH , FILL); //new experiment if(color==CYAN)GP142_lineXY(color,aliens[i].x,aliens[i].y, aliens[i].x,SHIP_LOCATION,FILL);//new experiment won=0; /* did not win */ }/* only draw live aliens */ }/* end of for loop over i */ if(won){ GP142_triangleXY(ORANGE,-300,-250,300,-250,0,0,FILL); GP142_printfXY(BLUE,-200,-225,20, " Y O U W O N wonderful Y O U W O N "); }/* end of winning message */ } /* Initialize each alien. */ void create_aliens(space_alien aliens[]) { int i; int increment = (SCREEN_WIDTH)/(NUMBER_OF_ALIENS+1); int start = SCREEN_X + increment; for (i = 0; i < NUMBER_OF_ALIENS; i++) { // /* An alien consists of a circle with two lines through it */ aliens[i].alive=1; /*alive=0 means dead */ /* new part */ if(i==5||i==8){aliens[i].hits=2; aliens[i].color=RED;} else if (i % 2 ==0){aliens[i].hits=0;aliens[i].color=BLUE;} else {aliens[i].hits=1;aliens[i].color=GREEN;} // aliens[i].color=RED; /*change this later */ // aliens[i].hits=0; /*end of new part */ aliens[i].x= start+increment*i; aliens[i].y=SHIP_LOCATION + 50*DIST_TO_SHIP; } /* end of loop over for i */ } /* Every so often (timer) the aliens should move down a level */ void update_aliens(space_alien aliens[], int *timer, int *ship_x) { /* add code here so that aliens drop down a level (and attack) every so often (depending on TIME_PER_ATTACK) */ int ystart=SHIP_LOCATION + 50*DIST_TO_SHIP; int trial_y , i ,trial_x , k; int t=(*timer/TIME_PER_ATTACK); for(i=0;i ystart) trial_y=ystart - 300; if((t%14)>6){ trial_y=ystart-(7-(t%14)%7)*50;/*new*/ /* new part later could go back and use random colors & levels for now we have 3 levels change create_aliens later */ if(i==5||i==8)trial_y=trial_y; else if(i%2 == 0) trial_y=trial_y-50;//changed to -50 else trial_y=trial_y +50;}//changed to +50 if(trial_y > ystart) trial_y=ystart - 300; /* new part later could go back and use random colors & levels for now we have 3 levels change create_aliens later */ /*end of new part */ // trial_y= aliens[i].y -(t % 7)*5; // too fast if(trial_y < (SHIP_LOCATION + ALIEN_WIDTH)) trial_y=ystart; //start from top aliens[i].color=BLACK; draw_aliens(aliens); if(aliens[i].hits>2) aliens[i].alive=0; //dead is zero //aliens[i].color=RED; if(aliens[i].hits==0)aliens[i].color=BLUE; if(aliens[i].hits==1)aliens[i].color=GREEN; if(aliens[i].hits==2)aliens[i].color=RED; aliens[i].y=trial_y; //experimental moves aliens // attempt to slow down aliens if((*timer%70)==1){ trial_x=aliens[i].x+(SCREEN_WIDTH/(NUMBER_OF_ALIENS +1)); if(trial_x>(SCREEN_WIDTH + SCREEN_X))trial_x=SCREEN_X+SCREEN_WIDTH/(NUMBER_OF_ALIENS +1); aliens[i].x=trial_x; } if (((t%14)==7 ) && aliens[i].hits==0) { //aliens fire at ship aliens[i].color=CYAN; draw_aliens(aliens); //newest // check if ship was hit if(abs(*ship_x - aliens[i].x)<5){ /*yes was hit*/ for (k=0;k' to move right."); GP142_printfXY(GOLD, 110, GP142_YMAX - 45, 15, "Press spacebar to shoot."); GP142_printfXY(GOLD,-200,GP142_YMAX -50,15,"Press ' f ' to shoot 3 aliens at once"); GP142_printfXY(BLACK,-295,-GP142_YMAX +15, 10,"Elaine Chan "); } // this is under development /* When the user wants to fire a that hits 3 aliens at one shot */ void fire_shot3in1(space_alien aliens[], int *ship_x) { int i ,j ,k; int increment = (SCREEN_WIDTH)/(NUMBER_OF_ALIENS+1); int start = SCREEN_X + increment; int shot_height = SCREEN_Y + SCREEN_HEIGHT; /* new temporary part */ int originalx, originaly; /*aliens[i].x and y before it goes chaotic */ int x[4],y[4]; /*end initialization for temporary part */ for (i = 0; i < NUMBER_OF_ALIENS; i++) { /* Check if shot was near an alien */ // if (abs(*ship_x - start - i*increment) < 5) //original if(abs( *ship_x - aliens[i].x) < 5) { shot_height = SHIP_LOCATION + 50*DIST_TO_SHIP; /* hit three aliens at once */ if(aliens[i].alive)aliens[i].hits++; if(i==0){if(aliens[i+1].alive)aliens[i+1].hits++;} else if (i==9){if(aliens[i-1].alive)aliens[i-1].hits++;} else {if(aliens[i+1].alive)aliens[i+1].hits++; if(aliens[i-1].alive)aliens[i-1].hits++;} /*end hit three at once except for hit 2 if on end*/ GP142_lineXY(YELLOW, *ship_x, SHIP_LOCATION + 3*SHIP_HEIGHT/2, *ship_x, shot_height, FILL); /* should hit 3 aliens at once experimental bomb thrower */ for(k=0;k<10;k++){ for(j=0;j<30000;j++){ /* time delay */} GP142_ovalXY(MAGENTA,*ship_x-k*5,SHIP_LOCATION + 3*SHIP_HEIGHT/2 +35*k -4, *ship_x + k*5,SHIP_LOCATION+3*SHIP_HEIGHT/2 + 35*k +4,0); } /* end experimental bomb */ // makes blue crossed lines on aliens for(k=-1;k<2;k++){ for(j=-1;j<2;j++){ GP142_lineXY(ICE_BLUE,aliens[i].x+k*18,aliens[i].y+j*18, aliens[i].x-k*18,aliens[i].y-j*18,0); }/* end of for loop over j */ }/* end of for loop over k */ /* begin new part */ /* save original coordinates of aliens[i] */ originalx=aliens[i].x; originaly=aliens[i].y; /* redefining x[4] and y[4] */ x[0] =originalx-20; y[0]=originaly; x[1]= originalx; y[1]=originaly-10; x[2]=originalx +20; y[2]=originaly; x[3]=originalx; y[3]=originaly +10; /*laser shot makes the alien move chaotically then return to original*/ /*erase previous aliens[i] */ for(k=4;k>0;k--){ for (j=0;j<20000;j++) { /*time delay */} aliens[i].color=BLACK; draw_aliens(aliens); /*new position */ aliens[i].color=YELLOW + i; aliens[i].x=x[k];aliens[i].y=y[k]; draw_aliens(aliens); }/* end of loop over k(reused) */ aliens[i].x=originalx; aliens[i].y=originaly; draw_aliens(aliens); /*end new part */ } /* end of yes if ship hit the alien */ }/*end of for loop over i */ } /* Display error message if internal error is detected. */ void something_is_wrong (void) { GP142_printfXY (RED, -120, -GP142_YMAX + 20, 16, "BAAAADDD NEWS!"); }