Motion Blurring Tutorial

By Tom

In this tutorial...

batch.sio		siocons / PSComUtil batch file
main.c			demo code
NY.pxe			executable
sprite.tim		simple TIM file
readme.txt		this file
mypad.h			button definitions


This tutorial shows how to do motion blurring. OK, this is a really simple
demo and so doesn't look that good but it uses the same method as my torus
demo and (presumably) Metal Gear Solid and the forthcoming RollCage. The
thing to watch out for is that all the sprites that you use MUST have the
semi-transparency bit set, whether they use transparencies or not. If you
want to do some strange effects, try playing about with the scaling and
rotation values of the motion blurring sprites.


Directions...

left, right, up, down	move the sprites
X, Triangle		scale the sprites
Squre, Circle		rotate the sprites
Start & Select		quit the program


How It Works...

The motion blurring effect is really quite easy to achieve and I'm
surprised it isn't done more often. All you have to do is use the last
screen drawn as a sprite and, instead of clearing the screen, overlay the
sprite back on the current screen using (0.5 front)+(0.5 back) transparency.
Setting the rgb values of the sprite can make the motion blur go different
colours.

If you've got any questions or comments, mail me at...

tm7130@bristol.ac.uk