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Resetting Player Location on State Change
Lasaqus7
Member #15,950
May 2015

Back again :-(.

What I am trying to do is when my state changes to COMBAT, I need my players location to be reset to another location rather than the last location he was on the map.

I did actually have this working before (until I deleted the code to fix another issue) now I can't seem to figure it out again.

#SelectExpand
1 2enum STATE{MENU, PLAYING, COMBATSCREEN, COMBAT, GAMEOVER}; 3 4Player Human; 5 6//Prototypes 7void ChangeState(int &state, int newState); 8 9void InitHuman(Player &Human, ALLEGRO_BITMAP *image); 10void DrawHuman(Player &Human); 11void MoveHumanLeft(Player &Human); 12void MoveHumanRight(Player &Human); 13 14void DrawCombatHuman(Player &Human); 15 16int main(void) 17{ 18 //ALLEGRO VARIABLES 19 ALLEGRO_DISPLAY *display = NULL; 20 ALLEGRO_EVENT_QUEUE *event_queue = NULL; 21 ALLEGRO_TIMER *timer = NULL; 22 ALLEGRO_BITMAP *HumanImage; 23 24 //ALLEGRO INIT FUNCTIONS 25 if (!al_init()) //Initialize Allegro 26 return -1; 27 28 display = al_create_display(WIDTH, HEIGHT); //Create display object 29 30 if (!display) //Test display object 31 return -1; 32 33 //ADDON INSTALL 34 al_init_primitives_addon(); 35 al_install_keyboard(); 36 al_install_mouse(); 37 al_init_image_addon(); 38 al_init_font_addon(); 39 al_init_ttf_addon(); 40 41 //PROJECT INIT 42 event_queue = al_create_event_queue(); 43 timer = al_create_timer(1.0 / FPS); 44 45 //LOAD IMAGES AND SPRITESHEETS 46 HumanImage = al_load_bitmap("spritesheethuman.bmp"); 47 al_convert_mask_to_alpha(HumanImage, al_map_rgb(106, 76, 48)); 48 49 srand(time(NULL)); 50 //INIT CHARACTERS 51 ChangeState(state, MENU); 52 53 InitHuman(Human, HumanImage); 54//InitCombatHuman(Human, HumanImage); TESTING 55 56 //TIMER INIT AND STARTUP 57 al_register_event_source(event_queue, al_get_keyboard_event_source()); 58 al_register_event_source(event_queue, al_get_mouse_event_source()); 59 al_register_event_source(event_queue, al_get_timer_event_source(timer)); 60 al_register_event_source(event_queue, al_get_display_event_source(display)); 61 62 al_start_timer(timer); 63 while (!done) 64 { 65 ALLEGRO_EVENT ev; 66 al_wait_for_event(event_queue, &ev); 67 68 if (ev.type == ALLEGRO_EVENT_TIMER) 69 { 70 render = true; 71 72 //UPDATE=========================================== 73 if (keys[UP] || keys[W]) 74 MoveHumanUp(Human); 75 else if (keys[DOWN] || keys[S]) 76 MoveHumanDown(Human); 77 else if (keys[LEFT] || keys[A]) 78 MoveHumanLeft(Human); 79 else if (keys[RIGHT] || keys[D]) 80 MoveHumanRight(Human); 81 else if (keys[SPACE]) 82 //===================================================== 83 if (state == MENU) 84 { 85 86 } 87 else if (state == PLAYING) 88 { 89 90 } 91 else if (state == COMBATSCREEN) 92 { 93 94 } 95 else if (state == COMBAT) 96 { 97 98 } 99 } 100 101 //========================================================== 102 //RENDER 103 //========================================================== 104 if (render && al_is_event_queue_empty(event_queue)) 105 { 106 render = false; 107 108 if (state == MENU) 109 { 110 } 111 else if (state == PLAYING) 112 { 113 DrawHuman(Human); 114 } 115 else if (state == COMBATSCREEN) 116 { 117 if (keys[SPACE]) 118 state = COMBAT; 119 } 120 else if (state == COMBAT) 121 { 122 //InitCombatHuman(Human); If I put this here, players starts at the right location but cannot move. 123 DrawCombatHuman(Human); 124 } 125 else if (state == GAMEOVER) 126 { 127 128 } 129 130 //FLIP BUFFERS ========================================= 131 al_flip_display(); 132 al_clear_to_color(al_map_rgb(0, 0, 0)); 133 } 134 } 135 136 //========================================================== 137 //DESTROY PROJECT OBJECTS 138 //========================================================== 139 140 al_destroy_bitmap(HumanImage); 141 al_destroy_event_queue(event_queue); 142 al_destroy_timer(timer); 143 al_destroy_font(font18); 144 al_destroy_display(display); 145 146 return 0; 147} 148 149void InitHuman(Player &Human, ALLEGRO_BITMAP *image = NULL) 150{ 151 Human.x = 50; 152 Human.y = 460; 153 Human.ID = PLAYER; 154 Human.speed = 2; 155 Human.boundx = 15; 156 Human.boundy = 25; 157 158 Human.maxFrame = 8; 159 Human.curFrame = 0; 160 Human.frameCount = 0; 161 Human.frameDelay = 5; 162 Human.frameWidth = 96; 163 Human.frameHeight = 96; 164 Human.animationColumns = 13; 165 Human.animationDirection = 1; 166 167 Human.animationRow = 0; 168 169 if (image != NULL) 170 Human.image = image; 171} 172//void InitCombatHuman(Player &Human, ALLEGRO_BITMAP *image = NULL) 173//{ 174//Human.x = 50; TESTING 175//Human.y = 460; 176//} 177void DrawHuman(Player &Human) 178{ 179 int fx = (Human.curFrame % Human.animationColumns) * Human.frameWidth; 180 int fy = Human.animationRow * Human.frameHeight; 181 182 al_draw_bitmap_region(Human.image, fx, fy, Human.frameWidth, Human.frameHeight, Human.x - Human.frameWidth / 2, Human.y - Human.frameHeight / 2, 0); 183} 184void DrawCombatHuman(Player &Human) 185{ 186 Human.x = 50; //If i add these x/y my player is located at the right place but unable to move 187 Human.y = 460; // If I remove them my player is located at the last location he was in the previous state 188 189 int fx = (Human.curFrame % Human.animationColumns) * Human.frameWidth; 190 int fy = Human.animationRow * Human.frameHeight; 191 192 al_draw_bitmap_region(Human.image, fx, fy, Human.frameWidth, Human.frameHeight, Human.x - Human.frameWidth / 2, Human.y - Human.frameHeight / 2, 0); 193} 194 195void MoveHumanLeft(Player &Human) 196{ 197 Human.animationRow = 4; 198 Human.animationColumns = 8; 199 Human.animationDirection = 1; 200 if (++Human.frameCount >= Human.frameDelay) 201 { 202 Human.curFrame += Human.animationDirection; 203 if (Human.curFrame >= Human.maxFrame) 204 Human.curFrame = 0; 205 else if (Human.curFrame <= 0) 206 Human.curFrame = Human.maxFrame - 1; 207 208 Human.frameCount = 0; 209 } 210 211 Human.x -= Human.speed; 212 if (Human.x < 0) 213 Human.x = 0; 214} 215void MoveHumanRight(Player &Human) 216{ 217 Human.animationRow = 2; 218 Human.animationColumns = 8; 219 Human.animationDirection = 1; 220 if (++Human.frameCount >= Human.frameDelay) 221 { 222 Human.curFrame += Human.animationDirection; 223 if (Human.curFrame >= Human.maxFrame) 224 Human.curFrame = 0; 225 else if (Human.curFrame <= 0) 226 Human.curFrame = Human.maxFrame - 1; 227 228 Human.frameCount = 0; 229 } 230 Human.x += Human.speed; 231 if (Human.x > WIDTH) 232 Human.x = WIDTH; 233} 234 235void ChangeState(int &state, int newState) 236{ 237 if (state == MENU) 238 { 239 } 240 else if (state == PLAYING) 241 { 242 } 243 else if (state == COMBATSCREEN) 244 { 245 246 } 247 else if (state == COMBAT) 248 { 249 } 250 251 state = newState; 252 253 if (state == MENU) 254 { 255 } 256 else if (state == PLAYING) 257 { 258 InitHuman(Human); 259 InitEnemy(Orc); 260 } 261 else if (state == COMBATSCREEN) 262 { 263 //InitCombatHuman <-- Tried to declare different x/y values here 264 } 265 else if (state == COMBAT) 266 { 267 } 268}

I have tried to add in a new function InitCombatHuman so I could declare different x/y values for when the state == COMBAT although he still started in the location he was in the PLAYING state.

I tried to delete all unnecessary code so it maybe easier to see the issue.

EDIT :- It's fine now I think, so far I managed to get the player to relocate correctly and move.

beoran
Member #12,636
March 2011

Lasaqus7 said:

I did actually have this working before (until I deleted the code to fix another issue) now I can't seem to figure it out again.

You are in dire need of learning how to use a version control system or VCS. Why not go pro and learn how to use git (http://git-scm.com/)? With a VCS you can make a commit when something works and if you break it later you can go back in time and see what you have changed and even undo some changes without losing your new work. Knowledge of using a vcs is an essential programmer skill IMHO.

Lasaqus7
Member #15,950
May 2015

Cheers beoran, I'll have to check something like that out and if something works, not to delete it just comment it out.

Chris Katko
Member #1,881
January 2002
avatar

Or at the very least, at the end of the day, copy/zip the folder containing your code and game, and keep each version.

-----sig:
“Programs should be written for people to read, and only incidentally for machines to execute.” - Structure and Interpretation of Computer Programs

beoran
Member #12,636
March 2011

Well that's the advantage of using a VCS properly. As long as you commit often, you don't need to keep tons of zip files or backup folders around. And you can actually delete code without worries as long as you make a commit before doing it. A VCS allows you to restore the sources to any version you previously made a commit of.

What Chris proposes can also work, but making daily backups is really a poor man's "VCS". A real VCS like Git, or mercurial is much more useful.

taron 
Member #10,584
January 2009
avatar

If you're using VS2013, it has a easy to use git plugin built-in (Well I guess it's not really a plugin anymore then, but aside from that).
Although I'd still recommend to learn it properly and not just rely on the plugin.

Lasaqus7
Member #15,950
May 2015

I'll definitely be looking at it and I am using VS2013.

I like it how you ask a question, and even though I fixed my issue, I still get help and advice on ways to improve my working ;D

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