C++ Allegro 5 Made Easy Tutorial 30 - Scaling the Camera [Camera Effects] Video Lecture | Allegro: A Complete Guide - Game Development

hello everybody and welcome to your 30th
a level 5 tutorial and in this tutorial
we're gonna be learning about scaling
the camera and basically this is gonna
be learning about the zoom effect so
I've added in another variable called
scale and I've said that to 1.0 and to
float value and the default scale if a
skill set to 1 that means to normal size
if I said the tool is double the size
and if it's set to 0.5 its half the size
okay so I said 2 1 by default so I have
I added in two statements here so if
they persons that the D key then the the
scale will increase they press the a key
the the scale will decrease right so
scales work the same way as rotations as
with origin so the fall origin for the
scale would be 0 0 and if we translate
it if we translate it therefore and I'll
get rid of the rotation
I will actually I'll keep it there it
shouldn't confuse you but the rotation
the the origin is changed by the
translations when we translate it we
change the origin so after rotate or
before rotate any one you want to do you
do al scale transform you put in the
transform you're gonna be changing and
then you put in this scale for the X&Y
so if you only want to zoom in in the x
coordinate you could do that just for
the X component if you were trying to
scale in the y coordinate you can do
that as well but if you have them
uniform then you get a nice zooming in
effect if we were to put this scale
before or if you put this before this
translate or after this translate then
the board is zoom in to the origin
position so if we were in this program
right here if we this this it's gonna
zoom in to the player so if I press the
D key it zooms into the player no matter
where dooms out to where the player
position is anywhere so yeah so if we
zoom in zoom in the player cetera et
cetera
so that is it for this tutorial hope you
enjoyed this thanks for watching and bye