Bitmap behind mappy map

Bitmap behind mappy map

PCwizard200

Member #16,127

December 2015

Hy everyone. When drawing my tile map I made in mappy and then drawing my player image on the screen also, I relized that the player image was behind the tile map. So in order to fix this problem is there a command in allegro 5 that I can use to fix this problem. The tutorial series in which I learned allegro from on fixbyproximity.com only showed the command to draw the map really.

source code just in case just keep in mind the project is def not finished

#SelectExpand
   1//This is the source code for my game in allegro 5, The game is called MENACER and It is a work in progress
   2//I want this game to look decent and be fun to play, so it will probably take a while for me to get it finished
   3//don't use this source code without my permission, Thanks.
   4
   5#include <allegro5/allegro.h>
   6#include <allegro5/allegro_image.h>     //including our allegro headers here
   7#include <allegro5/allegro_ttf.h>
   8#include <allegro5/allegro_font.h>
   9#include <allegro5/allegro_primitives.h>
  10#include <allegro5/allegro_acodec.h>
  11#include <allegro5/allegro_audio.h>
  12#include <allegro5/allegro_native_dialog.h>
  13#include <iostream>
  14#include <math.h>
  15#include "mappy_A5.h"
  16
  17const int WIDTH = 800;          //Defining my width of the game window and height
  18const int HEIGHT = 600;
  19
  20bool keys[] = {false, false, false, false, false, false, false, false};     //declare the controls we are using for my game
  21enum KEYS{UP, DOWN, LEFT, RIGHT, SPACE, C, F, ESCAPE};
  22
  23enum STATE{MENU, PLAY, GAMEOVER, QUIT};     //game state declaration
  24
  25void ChangeState(int &state, int newState); //change state void declaration
  26
  27//THE MAIN PROGRAM IS HERE!
  28int main(void){
  29
  30//Game variables!
  31bool done = false;
  32bool render = false;
  33
  34float gameTime = 0;
  35int frames = 0;
  36int gameFPS = 0;
  37
  38int state = -1;
  39
  40int xOff = 0;
  41int yOff = 0;
  42
  43//ALLEGRO VARIABLES!
  44ALLEGRO_DISPLAY *display = NULL;
  45ALLEGRO_EVENT_QUEUE *event_queue = NULL;
  46ALLEGRO_TIMER *timer;
  47ALLEGRO_FONT *font10;
  48ALLEGRO_BITMAP *MenuImage = NULL;
  49ALLEGRO_BITMAP *MenacerTank = NULL;
  50ALLEGRO_SAMPLE *MenuTheme = NULL;
  51ALLEGRO_SAMPLE *LV1music = NULL;
  52ALLEGRO_SAMPLE_INSTANCE *instance1 = NULL;
  53ALLEGRO_SAMPLE_INSTANCE *instance2 = NULL;
  54
  55if (!al_init())
  56return -1;
  57
  58display = al_create_display(WIDTH, HEIGHT);     //initiate the display
  59
  60
  61if(!display)
  62return -1;
  63
  64//ADDON INSTALL
  65al_install_keyboard();
  66al_init_image_addon();
  67al_init_font_addon();
  68al_init_ttf_addon();
  69al_init_primitives_addon();
  70al_install_audio();
  71al_init_acodec_addon();
  72
  73al_reserve_samples(2);
  74
  75if (MapLoad("level 1.FMP",1))
  76return -5;
  77
  78//loading game assets
  79font10 = al_load_font("atari.ttf", 24, 0);
  80MenuImage = al_load_bitmap("menu art.png");
  81MenacerTank = al_load_bitmap("tank.png");
  82MenuTheme = al_load_sample("Robotech - Rick Hunter's Theme.ogg");
  83LV1music = al_load_sample("raiden 1.ogg");
  84
  85instance1 = al_create_sample_instance(MenuTheme);
  86instance2 = al_create_sample_instance(LV1music);
  87
  88al_attach_sample_instance_to_mixer(instance1, al_get_default_mixer());
  89al_attach_sample_instance_to_mixer(instance2, al_get_default_mixer());
  90
  91ChangeState(state, MENU); //THE FIRST STATE MY GAME WILL GO TO IS THE MENU STATE
  92
  93
  94event_queue = al_create_event_queue();
  95timer = al_create_timer(1.0 / 60);
  96
  97al_register_event_source(event_queue, al_get_timer_event_source(timer));
  98al_register_event_source(event_queue, al_get_keyboard_event_source());
  99
 100
 101al_start_timer(timer);
 102gameTime = al_current_time();
 103while(!done){
 104
 105    ALLEGRO_EVENT ev;
 106    al_wait_for_event(event_queue, &ev);
 107
 108    //INPUT FOR MY GAME IS HERE
 109    if(ev.type == ALLEGRO_EVENT_KEY_DOWN)
 110{
 111    switch (ev.keyboard.keycode)
 112    {
 113  case ALLEGRO_KEY_ESCAPE:
 114        keys[ESCAPE] = true;
 115        break;
 116        case ALLEGRO_KEY_SPACE:
 117        keys[SPACE] = true;
 118    break;
 119    case ALLEGRO_KEY_C:
 120        keys[C] = true;
 121        break;
 122    case ALLEGRO_KEY_F:
 123        keys[F] = true;
 124        break;
 125    case ALLEGRO_KEY_UP:
 126        keys[UP] = true;
 127        break;
 128    case ALLEGRO_KEY_DOWN:
 129        keys[DOWN] = true;
 130        break;
 131    case ALLEGRO_KEY_LEFT:
 132        keys[LEFT] = true;
 133        break;
 134    case ALLEGRO_KEY_RIGHT:
 135        keys[RIGHT] = true;
 136        break;
 137    }
 138
 139
 140}
 141
 142if (ev.type == ALLEGRO_EVENT_KEY_UP)
 143{
 144    switch(ev.keyboard.keycode)
 145    {
 146    case ALLEGRO_KEY_ESCAPE:
 147    keys[ESCAPE] =  false;
 148    break;
 149    case ALLEGRO_KEY_SPACE:
 150        keys[SPACE] = false;
 151        break;
 152    case ALLEGRO_KEY_C:
 153        keys[C] = false;
 154    break;
 155    case ALLEGRO_KEY_F:
 156        keys[F] = false;
 157        break;
 158    case ALLEGRO_KEY_UP:
 159        keys[UP] = false;
 160        break;
 161    case ALLEGRO_KEY_DOWN:
 162        keys[DOWN] = false;
 163        break;
 164    case ALLEGRO_KEY_LEFT:
 165        keys[LEFT] = false;
 166        break;
 167    case ALLEGRO_KEY_RIGHT:
 168        keys[RIGHT] = false;
 169        break;
 170    }
 171
 172
 173}
 174
 175else if (ev.type == ALLEGRO_EVENT_TIMER)
 176{
 177    render = true;
 178    //UPDATE FPS
 179    frames++;
 180    if(al_current_time() - gameTime >= 1)
 181    {
 182        gameTime = al_current_time();
 183        gameFPS = frames;
 184        frames = 0;
 185    }
 186
 187if (state == MENU)                                   //Game State Controls
 188{
 189    if(keys[SPACE])
 190    ChangeState(state, PLAY);
 191    else if(keys[ESCAPE])
 192        ChangeState(state, QUIT);
 193}
 194
 195
 196
 197else if (state == PLAY)
 198{
 199if(keys[ESCAPE])
 200        ChangeState(state, GAMEOVER);
 201}
 202
 203else if(state == GAMEOVER)
 204{
 205    if(keys[SPACE])
 206        ChangeState(state, MENU);
 207}
 208
 209xOff += keys[RIGHT] * 10;
 210xOff -= keys[LEFT] * 10;
 211yOff += keys[DOWN] * 10;
 212yOff -= keys[UP] * 10;
 213
 214if(xOff < 0)
 215xOff = 0;
 216if(yOff < 0)
 217    yOff = 0;
 218if(xOff > (mapwidth * mapblockwidth - WIDTH))
 219    xOff = mapwidth * mapblockwidth - WIDTH;
 220if(yOff > (mapheight * mapblockheight - HEIGHT))
 221    yOff = mapheight * mapblockheight - HEIGHT;
 222}
 223
 224
 225//Here we render everything
 226
 227if(render && al_is_event_queue_empty(event_queue))
 228{
 229
 230render = true;
 231
 232//BEGIN!
 233
 234 if (state == MENU)
 235{
 236al_draw_bitmap(MenuImage, 0,0,0);
 237al_set_sample_instance_playmode(instance1, ALLEGRO_PLAYMODE_LOOP);
 238al_play_sample_instance(instance1);
 239}
 240
 241else if(state == PLAY)
 242{
 243
 244    al_draw_bitmap(MenacerTank,200,100,0);
 245    al_stop_sample_instance(instance1);
 246    MapDrawBG(xOff,yOff,0,0, WIDTH, HEIGHT);
 247
 248
 249}
 250
 251
 252
 253
 254
 255
 256
 257
 258else if(state == QUIT)
 259{
 260    done = true;
 261}
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272al_flip_display();
 273al_clear_to_color(al_map_rgb(0,0,0));
 274}
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284}
 285
 286//DESTROY PROJECT OBJECTS
 287
 288al_destroy_font(font10);
 289al_destroy_bitmap(MenuImage);
 290al_destroy_timer(timer);
 291al_destroy_display(display);
 292al_destroy_event_queue(event_queue);
 293al_destroy_sample(MenuTheme);
 294al_destroy_sample(LV1music);
 295al_destroy_sample_instance(instance1);
 296al_destroy_sample_instance(instance2);
 297
 298MapFreeMem();
 299
 300return 0;
 301}
 302
 303void ChangeState(int &state, int newState)
 304{
 305
 306    if (state == MENU)
 307    {
 308        std::cout << "Leaving the MENU state \n";
 309    }
 310    else if (state == PLAY)
 311{
 312    std::cout <<"Leaving the PLAY state \n";
 313}
 314else if (state == GAMEOVER)
 315{
 316    std::cout << "Leaving the GAMEOVER state \n";
 317}
 318else if (state == QUIT)
 319{
 320    std::cout << "Leaving the QUIT state \n";
 321}
 322
 323state = newState;
 324
 325
 326    if (state == MENU)
 327    {
 328        std::cout << "Entering the MENU state \n";
 329    }
 330    else if (state == PLAY)
 331{
 332    std::cout <<"Entering the PLAY state \n";
 333}
 334else if (state == GAMEOVER)
 335{
 336    std::cout << "Entering the GAMEOVER state \n";
 337}
 338else if (state == QUIT)
 339{
 340    std::cout << "Entering the QUIT state \n";
 341}
 342
 343
 344}

Eric Johnson

Member #14,841

January 2013

Call the function to draw the map before drawing anything else, then draw the player.

else if(state == PLAY)
{

    MapDrawBG(xOff,yOff,0,0, WIDTH, HEIGHT); // Draw map first.
    al_draw_bitmap(MenacerTank,200,100,0);
    al_stop_sample_instance(instance1);


}

Every time you draw something, it goes above whatever was previously drawn. So think of it as going from the background to the foreground. If you were to draw bitmaps A, B, and then C, you would have A in the very back, followed by B, and then C in the very front.

PCwizard200

Member #16,127

December 2015

person said:

Eric Johnson:

Call the function to draw the map before drawing anything else, then draw the player.

else if(state == PLAY)
{

MapDrawBG(xOff,yOff,0,0, WIDTH, HEIGHT); // Draw map first.
al_draw_bitmap(MenacerTank,200,100,0);
al_stop_sample_instance(instance1);

}

Thanks Eric Johnson I honestly did not know that you have to put images in a certain order according to how you want it to look. Ya learn something every day!;D

Eric Johnson

Member #14,841

January 2013

You're welcome. I'm glad I could help.