Project for the course "Language, Compiler and Interpreter" of the University of Parma in the winter semester 2024/25. This tool lets developers define maps for platformer games and then play them.
Each program consists of a screen setting, player and one or more worlds. The following code shows an example game.
screen(1600, 800, 100);
player(Start, 20, 40);
world(Start, 50, 40){
block(0,0,500,200);
checkpoint(400,50,20,20);
platform(100, 200, 100, 5);
block(500,30,300,200);
finish(700, 110, 40, 80, Level_2);
}
world(Level_2, 100, 50){
block(0,0,300, 200);
block(350,50,400, 200);
finish(700, 130, 40, 80, Start);
}
The screen object sets the width and height of the screen of the game and the zoom factor. The zoom is in percentage. So under 100 the camera zooms out and above 100 it zooms in.
screen(String: title, Number: width, Number: height, Number: zoom);
Numbers have to be always positive integral numbers.
The player is the character that the user can move around. It is defined like the following code shows.
player(ID: initial world, Number: width, Number: height);
ID's start with a letter and the can be followed by other letters, numbers or underscore.
Each world has the following attributes and inside the { ... } section the game objects of a world is defined. Each world equals to one level of the game.
world(ID: Name, Number: Player spawn x, Number: player spawn y){ ... }
The following code shows how to define game objects inside worlds. A game object can be a block, a platform, a spike or a checkpoint.
gameobject(Number: x, Number: y, Number: width, Number: height);
In this section special game objects are defined. They can be added to the content of a world and have additional attributes to normal game objects.
The finish object can be used to mark a teleportation point to another world, like the following code shows.
finish(Number: x, Number: y, Number: width, Number: height, String: next world);
Developers can write their programs in a txt-file. The following steps show how to run the written program.
First clone the repository and then install following C libraries
- Bison
- Flex
Then for setup run the command
make.
If for example you write your Platformer code in the file platform_game.txt, the command
make compile INPUT=platform_game VERBOSE=1
can be used, to compile the code. The VERBOSE option can be set to get more logs when compiling. If no input or verbose value is set, the default input file is the file "input.txt" and verbose is set to true.
If the compilation of the program was successful run make run to play the created game.
To move the player left and right a and d are used and for jumping the key space. To respawn at the last checkpoint the key r is used.