Designing Games with Game Maker - YoYo Games

at the beginning of the animation or at a random place, etc. You use the following function for
this.
part_type_sprite(ind,sprite,animat,stretch,random) Sets your
own sprite for the particle type. With animate you indicate whether the sprite
should be animated (1) or not (0). With stretch (1 or 0) you indicate whether
the animation must be stretched over the lifetime of the particle. And with
random (1 or 0) you can indicate whether a random subimage must be
choosen as starting image.
Once you have choosen the sprite for the particle type (either a default shape or your own)
you can indicate the size of it. A size of 1 indicates the normal size of the sprite. A particle
type can be defined such that all particles have the same size or have different sizes. You can
indicate a range of sizes. Also, you can indicate whether the size should change over the
lifetime of the particle and whether some wiggling in the size will happen, giving a blinking
effect.
part_type_size(ind,size_min,size_max,size_incr,size_wiggle)
Sets the size parameters for the particle type. You specify the minimum
starting size, the maximum starting size, the size increase in each step (use a
negative number for a decrease in size) and the amount of wiggling. (The
default size is 1 and default the size does not change.)
part_type_scale(ind,xscale,yscale) Sets the horizontal and vertical
scale. This factor is multiplied with the size. It is in particular useful when you
need to scale differently in x- and y-direction.
The particles also have an orientation. Again the orientation can be the same for all particles,
can be different, and can change over the lifetime of the sprite. The angles specify counter-
clockwise rotations, in degrees.
part_type_orientation(ind,ang_min,ang_max,ang_incr,ang_wigg
le,ang_relative) Sets the orientation angle properties for the particle
type. You specify the minimum angle, the maximum angle, the increase in
each step and the amount of wiggling in angle. (Default all values are 0.) You
can also indicate whether the given angle should be relative (1) to the current
direction of motion or absolute (0). E.g. by setting all values to 0 but