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POAdding split-screen multiplayer to c++ game
 

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  1. POAdding split-screen multiplayer to c++ game
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    <p>I am coding for the NDS in c++ with libnds, but this question is not NDS-Specific. I currently have a text-based game in which the top screen just displays a logo, and you play on the bottom screen.</p> <p>So I want to add a type of single-DS multiplayer in which one player plays on the top screen, and the other on the bottom. I dont have a problem with setting up the text engine with both screens, I just need to find a method of efficiently coding in multiplayer. Below I wrote a summary or simplified version of it.</p> <p>Note: consoleClear() clears the screen and the only spot where the game stops is att the pause function.</p> <pre><code>//Headers void display(int x,int y,const char* output)) { printf("\x1b[%d;%dH%s", y, x,output); } void pause(KEYPAD_BITS key) //KEYPAD_BITS is an ENUM for a key on the NDS { scanKeys(); while (keysHeld() &amp; key) { scanKeys(); swiWaitForVBlank(); } while (!(keysHeld() &amp; key)) { scanKeys(); swiWaitForVBlank(); } return; } void pause() //Only used to simplify coding { pause(KEY_A); return; } int main(void) { //Initializations/Setup while (1) { if (rand()%2==1) //Say Hello { if (rand()%3!=1) //To Friend (greater chance of friend than enemy) { display(6,7,"Hello Friend!"); display(6,8,"Good greetings to you."); pause(); consoleClear(); //Clears text display(6,7,"Would you like to come in?"); pause(); //Normally more complex complex code (such as interactions with inventories) would go here } else //To enemy { display(6,7,"Hello enemy!"); display(6,8,"I hate you!"); pause(); consoleClear(); display(6,7,"Leave my house right now!!!"); pause(); } } else //Say goodbye { if (rand()%4==1) //To Friend (lesser chance of friend than enemy) { display(6,7,"Goodbye Friend!"); display(6,8,"Good wishes to you."); pause(); consoleClear(); display(6,7,"I'll see you tomorrow."); pause(); consoleClear(); display(6,7,"Wait, I forgot to give you this present."); pause(); } else //To enemy { display(6,7,"Goodbye enemy!"); display(6,8,"I hate you!"); pause(); consoleClear(); display(6,7,"Never come back!!"); pause(); consoleClear(); display(6,7,"Good riddance!"); //I think I spelt that wrong... pause(); } } } } </code></pre> <p>I know gotos are confusing and can be considered a bad habit, but I cant think of a better way. My version of integrating multiplayer:</p> <pre><code>//Headers and same functions int game(int location) { switch (location) { case 1: goto one; break; case 2: goto two; break; case 3: goto three; break; case 4: goto four; break; case 5: goto five; break; case 6: goto six; break; case 7: goto seven; break; case 8: goto eight; break; case 9: goto nine; break; case 10: goto ten; break; default: break; } if (rand()%2==1) //Say Hello { if (rand()%3!=1) //To Friend (greater chance of friend than enemy) { display(6,7,"Hello Friend!"); display(6,8,"Good greetings to you."); return 1; one:; consoleClear(); //Clears text display(6,7,"Would you like to come in?"); return 2; two:; //Normally more complex complex code (such as interactions with inventories) would go here } else //To enemy { display(6,7,"Hello enemy!"); display(6,8,"I hate you!"); return 3; three:; consoleClear(); display(6,7,"Leave my house right now!!!"); return 4; four:; } } else //Say goodbye { if (rand()%4==1) //To Friend (lesser chance of friend than enemy) { display(6,7,"Goodbye Friend!"); display(6,8,"Good wishes to you."); return 5; five:; consoleClear(); display(6,7,"I'll see you tomorrow."); return 6; six:; consoleClear(); display(6,7,"Wait, I forgot to give you this present."); return 7; seven:; } else //To enemy { display(6,7,"Goodbye enemy!"); display(6,8,"I hate you!"); return 8; eight:; consoleClear(); display(6,7,"Never come back!!"); return 9; nine:; consoleClear(); display(6,7,"Good riddance!"); //I think I spelt that wrong... return 10; ten:; } return -1; } } int main(void) { //Initializations/Setup int location1 = -1, location2 = -1; location1 = game(location1); location2 = game(location2); while (1) { scanKeys(); //Whenever checking key state this must be called if (keysDown() &amp; KEY_A) //A key is used to continue for player1 location1 = game(location1); if (keysDown() &amp; KEY_DOWN) //Down key is used to continue for player2 location2 = game(location2); } } </code></pre> <p>Aside from this method being a bad practice, in the actual source code, I have hundreds of gotos I would need to add which would be too time consuming.</p> <p>Any help is appreciated. If anyone has the slightest of a question, or answer, please ask/reply.</p> <p>Edit: Though it is not preferred to do so, I am willing to rewrite the game from scratch if someone has a method to do so.</p>
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    1. USMatthew D. Scholefield
    1. USMatthew D. Scholefield
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    1. CORegarding the gotos, why not put common functionality in functions, and call them when needed? Like in the cases? *and* in the default case.
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      1. POAdding split-screen multiplayer to c++ game
      1. USSome programmer dude
    2. CORegarding your problem with multi-player and split screen, these things would work *much* better if the game was designed for that from the beginning. Yes, I suggest that you simply scratch your current solution and start over with a new design. Adding such things to an already working solution will always turn out bad, even if its working.
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      1. POAdding split-screen multiplayer to c++ game
      1. USSome programmer dude
    3. CO@Joachim Pileborg: Sure, I am willing to redesign the whole game from scratch, just I cant even think of a way to do that. If I could find a way to do that, then it would answer my question.
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      1. POAdding split-screen multiplayer to c++ game
      1. USMatthew D. Scholefield
 

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