GameMaker Studio - Lesson #9: Arrays (Beginner Tutorial)
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Lesson Title:
GameMaker Studio - Lesson #9: Arrays and the For Loop
Lesson Description:
In this video, you'll learn about one-dimensional and two-dimensional arrays, as well as the For loop.
Timecodes:
00:00 - Introduction
00:15 - Example: Simple Inventory
00:33 - How to Write an Array
00:52 - What is an Array
02:27 - How to Write an Array Using a Loop
06:40 - Printing an Array
10:00 - Checking if a Cell is Empty
10:44 - Two-Dimensional Array
14:50 - Explanation of How a Loop Works
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*****
name_mass[0]="any_name"; //array entry
*****
One-dimensional array
Ob_array
*Create //when creating an object
for(i = 0; i＜4; i++) //loop, from cell 0 to cell 3
{
global.inventory[i]="none"; //inventory, array (visible everywhere)
}
*Draw //draw on screen
for(i = 0; i＜4; i++) //loop, from 0 to 3
{
draw_text(30+60*i,30,global.inventory[i]); //display on screen
}
Object2
*Left Pressed //if the left mouse button is pressed
for(i = 0; i＜4; i++) //loop from cell 0 to cell 3
{
if(global.inventory[i]="none") //check if the cell is empty
{
global.inventory[i]="sword"; //write to the "sword" array cell
instance_destroy(); //delete the Object2 object
exit; //exit the loop
}
}
*****
Two-dimensional array
Ob_array
*Create //when creating an object
for(i = 0; i＜4; i++) //loop through the i-th row, from cell 0 to cell 3
{
for(j = 0; j＜4; j++) //loop through the j-th column, from cell 0 to cell 3
{
global.inventory[i][j]=k; //two-dimensional inventory array (visible everywhere)
}
}
*Draw //draw on screen
for(i = 0; i＜4; i++) //loop through row i, from cell 0 to cell 3
{
for(j = 0; j＜4; j++) //loop through column j, from cell 0 to cell 3
{
draw_text(30+60*i,30+60*j,global.inventory[j][i]); //display on screen
}
}
Object2
*Left Pressed //if the left mouse button is pressed
for(i = 0; i＜4; i++) //loop through row i, from cell 0 to cell 3
{
for(j = 0; j＜4; j++) //loop through column j, from cell 0 to cell 3
{
if(global.inventory[i][j]="none") // cell is empty in a two-dimensional array
{
global.inventory[i]="sword"; //write to array cell "sword"
instance_destroy(); //delete Object2
exit; //Exit the loop
}
}
}
*****
Notes:
1. Array numbering starts at 0
/ ...