Game Development Reference
In-Depth Information
Programming the game
With our object created and ready to go, we are now also ready to program the game and
make it work. All this will be done in the player object.
Add a
Create
event to the player object and then drag in a code block from the control tab
on the right. You can actually change the default tab for objects in the GameMaker prefer-
ences.
The first thing we need to do is think about what variables we are going to need. We are
going to make the game record the score, so we will need a variable for this. To make the
code easier to edit, we can also create a variable for storing the maximum speed we want
the player to move at. Finally, we can store our controls in variables to make the code easi-
er to edit later on. The reason we store key controls in variables is so that if we want to
change the controls later on, we can simply change the variable instead of changing every
keyboard check.
Here is the code for our speed and control variables:
S=0; //score
max_spd=10;
key_right=vk_right; //move right
key_left=vk_left; //move left
key_down=vk_down; //move down
key_up=vk_up; //move up
