Instance Properties

This section shows all the built-in variables that an instance has.

When an instance is created, GameMaker: Studio generates a number of pre-defined variables to help you set and change certain common properties, such as the sprite_index, or the depth. Below you can find a list of all these built-in variables.

General Variables

These variables deal with general instance properties:

1. id
   
2. solid
   
3. visible
   
4. persistent
   
5. depth
   
6. alarm
   
7. object_index
   

Sprite Variables

These variables deal with sprites and their sub-images:

1. sprite_index
   
2. sprite_width
   
3. sprite_height
   
4. sprite_xoffset
   
5. sprite_yoffset
   
6. image_alpha
   
7. image_angle
   
8. image_blend
   
9. image_index
   
10. image_number
    
11. image_speed
    
12. image_xscale
    
13. image_yscale
    

Mask Variables

These variables deal with the collision mask:

1. mask_index
   
2. bbox_bottom
   
3. bbox_left
   
4. bbox_right
   
5. bbox_top
   

Additional Variables

There are a great many more specialised variables that are not used as much as the ones above as they relate to specific aspects of GameMaker: Studio that not all games will make use of. The following sections deal with these variables:

1. Movement Variables
   
2. Path Variables
   
3. Timeline Variables
   
4. Physics Variables
   

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