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(3 basic transformation (3) change the size(scale) (2 thing consider -:1) …
3 basic transformation
2) change the angle (
Rotation
)
change the orientation of the obiject
need to consider -:1) Rotation angale
2) pivot point
around the point that rotation is happened
it is
rigid body transformation
3) change the size(
scale
)
2 thing consider -:1) scaling factor (amount the size is happening)
2) fixed point
scaling is a simple maltipication
it is not rigid body transformation
1) change position(
translation
)
move frame 1 position to another in straight line path
1) it is simple addition
2) translation doesn't consider
central point
3) it is a
rigid-body transformation
3D graphic
3) 3D viewing
i) create model
(MC)---->modeling transformation(WC)
ii) set the camera
viewing transformation(VC)
1)decide the position on the camera
2)decide direction of camera
3)finalized the view volume
shape v.v
i) perspective
ii)parallel
size v.v
i) perspective
c) up vector
d) aspect ratio of film plane
b) look vector
e)height angle
a) posision
f)far & near clipping plane
ii)parallel
only 1 change(using height &weight)
iii) select suitable lenss
projection transformation(PC)
ii) projector object size smaller than actual obijet
iii)COP is withing visible area
i) projector marge at COP
iv) not suitable to take measurement
v) using natural scens
main features of p.p
1)perspective foreshortening
2) vanishing point
iv)determine final size
window to view-port transformation (DC)
1) modeling
2) Rendering
Geometrical transformation
2D
2D view (camera)
p.p