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Unformatted text preview: (Xw Wxmin )(Vxmax Vxmin ) + V + Vxmin
with a similar expression for Yv with a similar expression for Yv with a similar expression for Yv • with a similar expression
for Yv ! 7 / 47 Graphics Lecture 1: Slide 13! 7 / 47 Normalisation
• So we have two equations for calculating pixel
So weoordinates (Xv,Yv). ! calculating pixel coordinates (Xv , Yv ).
c have 2 equations for
• We can simplify them to form a simple pair of linear
We can simplify !them to form a simple pair of linear equations:
Xv = AXw + B
Yv = CYw + D • Here A, B, C and D are constants that deﬁne the
Where A, B, C and .D ,are constants found fromthe normalisation.
normalisation A B, C, D are that deﬁne the known values
of Wxmin, Vxmin, ...
A, B, C, D are found from the known values of Wxmin , Vxmin , . . .
Graphics Lecture 1: Slide 14! Input for graphics systems!
• An input event occurs when something changes, e.g. a
mouse is moved or a button is pr...
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This document was uploaded on 03/26/2014.
- Spring '14