notes:comporg:spring2024:projects:mpg0
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| notes:comporg:spring2024:projects:mpg0 [2024/02/02 19:51] – [Gamepad input] cmazzara | notes:comporg:spring2024:projects:mpg0 [2024/02/08 02:32] (current) – [Game loop] rspringe | ||
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| ====Game loop==== | ====Game loop==== | ||
| + | For this project, you will be making a Snake game. | ||
| + | The game loop for Snake is simple: you will control a snake around the screen to eat pieces of food. Once a piece of food has been eaten, your score will increase, and the snake will get longer. | ||
| + | |||
| + | The game ends when the head of the snake runs into either a wall, or another part of its body. | ||
| ====Sprites==== | ====Sprites==== | ||
| + | * There should be a sprite for at least a background, the snake' | ||
| + | * Some good free sprite software' | ||
| + | * A link to GIMP download: https:// | ||
| + | * You could also have a death screen for when your snake dies. | ||
| + | |||
| + | Another good option for designing your snake is downloading a photo off the internet(probably an animated/ | ||
| ====Gamepad input==== | ====Gamepad input==== | ||
| There is obviously your arrow key inputs but there are other buttons available as well. At least for gamepad(0) we have button_?_ = ? for the average keyboard: | There is obviously your arrow key inputs but there are other buttons available as well. At least for gamepad(0) we have button_?_ = ? for the average keyboard: | ||
| Line 19: | Line 29: | ||
| * R = W | * R = W | ||
| * Start = Enter Key | * Start = Enter Key | ||
| + | |||
| + | ==Using controller== | ||
| + | For those out there who want the whole experience of gaming, therein lies the ability to plug in a real video game controller, if your system allows (some laptops will at least). To that end, the controls are pretty straight-forward. Either console controller will rely upon the D-pad for movement, and the buttons should map to the controllers as well. For example, ' | ||
| + | |||
| + | ==Arrow Key Setup== | ||
| + | If you are just trying to make the input based off of your arrow keys, you can simply copy the same setup: | ||
| + | <code C> | ||
| + | // Buttons to move up, down, left, and right | ||
| + | bool mRight = (gamepad_right() == 1); | ||
| + | bool mLeft = (gamepad_left() == 1); | ||
| + | bool mUp = (gamepad_up() == 1); | ||
| + | bool mDown = (gamepad_down() == 1); | ||
| + | </ | ||
| + | |||
| + | NOTE: You'll want to do this in your game loop (the while loop) and make sure it is inside of main but outside of you game loop have the following: | ||
| + | <code C> | ||
| + | // Selects keyboard as gamepad to use for input | ||
| + | select_gamepad(0); | ||
| + | </ | ||
| + | |||
| + | When making you gamepad you'll make gamepad_direction values, WalkX and WalkY for example purposes. | ||
| + | * If WalkX < 0 then that mean you're going left. | ||
| + | * If WalkX > 0 then that mean you're going right. | ||
| + | * If WalkY < 0 then that mean you're going up. | ||
| + | * If WalkY > 0 then that mean you're going down. | ||
| + | |||
| + | With those you would probably make it so that when WalkX < 0 var = 1. And then do: | ||
| + | <code bash> | ||
| + | if( var == 1 ) { | ||
| + | Snake[0].X -= PlayerSpeed; | ||
| + | } | ||
| + | </ | ||
| + | to make your snake constantly move after pressing an arrow key. | ||
| + | |||
| + | ==Alternate way of making endless mvoement== | ||
| + | you could also set up a switch and do something like the following: | ||
| + | <code C> | ||
| + | case RIGHT: | ||
| + | | ||
| + | | ||
| + | </ | ||
| + | |||
| + | Things to note before doing the above. Youll need to create global variables LEFT, RIGHT, UP, and DOWN. In the given example there is a struct named Shead (Stands for snake head). You will also need the following: | ||
| + | <code C> | ||
| + | // The direction is updated based on given input | ||
| + | if (mRight && SHead.Direction != LEFT) | ||
| + | { | ||
| + | SHead.Direction = RIGHT; | ||
| + | } | ||
| + | </ | ||
| + | |||
| + | The "&& | ||
| + | |||
| ====Bounds checking==== | ====Bounds checking==== | ||
| + | The screen on vircon32 is 640 by 360, however, you do not have to type these out every time you make a game in vircon32 as they are stored in the screen_width and screen_height variables respectively. One way of bounds checking is to see where you are about to spawn the snake' | ||
| ====Handling motion==== | ====Handling motion==== | ||
| + | To handle motion you could do: | ||
| + | <code c> | ||
| + | int SnakeX; | ||
| + | |||
| + | if( Right) | ||
| + | { | ||
| + | |||
| + | SnakeX = SnakeX + 20; | ||
| + | |||
| + | |||
| + | } | ||
| + | </ | ||
| ====Score Display==== | ====Score Display==== | ||
| + | |||
| + | you need the string.h header file | ||
| + | |||
| + | make a variable for the score | ||
| + | |||
| + | make an array to display the score | ||
| + | |||
| + | use the itoa function to convert the data, then use the print_at function to print it on the screen. | ||
| + | |||
| + | you can use the Vircon32 tutorials as a guide to help build and display the strings: https:// | ||
notes/comporg/spring2024/projects/mpg0.1706903480.txt.gz · Last modified: 2024/02/02 19:51 by cmazzara
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