Page 158 - DCAP313_LAB_ON_COMPUTER_GRAPHICS

Lab on Computer Graphics

Notes 12. Corrects meaning is the address of memory………………….
( a) physical address. (b) bus address.
( c) Both a and b (d) None of these.

13. A bilinear transformation can be simulated by the …………………
( a) transformation, rotation and stretching

( b) translation and rotation
( c) rotation, stretching and inversion
( d) rotation, stretching, inversion and translation.
14. What is the translating address?

( a) Physical and virtual addresses (b) Bus address.
( c) Physical address. (d) Virtual address.

15. What is address generator retrieves data from memory locations?
( a) Memory locations. (b) Memory control unit
( c) Bus address (d) None of these.

9.6 Summary

• Translation is one of the simplest transformations. A translation moves all points of an
object a fixed distance in a specified direction.
• Translation is a simple straight line movement of the object in x and y direction.
Transformation is refer to transform from one position to another position depends upon
their transformation.
• The address generator retrieves data from memory locations memory access request
directly to a memory control unit.

• The bus address is exactly the same as the physical address, and things are very simple
indeed.

9.7 Keywords

Bus Address: This is the address of memory as seen by other devices, not the CPU.
 
, )
Coordinates of Point: Given a frame F = (, , wo and a point P that has coordinates (u, v,
uv
w) in F, if we apply the transformation to the coordinates of the point.
Matrix/Vector of the Translations: A translation can also be represented by a pair of numbers,
t=(tx, ty) where tx is the change in the x-coordinate and ty is the change in y coordinate.
Translation Matrix: This function takes as parameters a reference to the matrix that holds the
current state of the transformation and the X and Y translation values.

9.8 Review Questions

1. Write a C program in 2Dimensional of the translation.
2. Write a C program in 3Dimensional of the translation.

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