1. What is color model?
A color
model is a method for explaining the properties or behavior of color within
some context.
2,List
out the properties that are perceive in a light source. Hue
Brightness(luminance)
Purity(saturation)
3.How is
the color expressed in XYZ color model? Any color is expressed as C1=XX+YY+ZZ
X,Y, and Z represent vectors in 3D
X,Y, and Z designate the amounts of
the standard primaries.
4.What is RGB color model?
The RGB
color model is an additive color model in which red,green and blue light is
added together in various ways to reproduce a broad array of colors.
5.How is RGB model represented?
RGB model
is represented by a unit cube. The color is expressed as an RGB triplet, each
component of which can vary from 0 to 1
6.What is YIQ color model?
YIQ is
the color space used by the National Television System Committee color TV
system. It was designed to separate chrominance from luminance. The Y,I,Q
components are assumed to be in the [0,1] or [0,255] range.
7.How is RGB converted to CMY?
The
conversion from RGB to CMY representation is done using the following matrix
transformation.
[C M Y]=[1 1 1]-[R G B]
Where [1 1 1]represents white.
8.How is CMY converted to RGB?
The
conversion from CMY toRGB representation is done using the following matrix
transformation.
[R G B]=[1 1 1]-[C M Y]
Where [1 1 1] represents black.
9.What is HSV color model?
HSV
stands for Hue,Saturation and Value. Hue-The color we see(red,green,purple)
Saturation-How far is the color from gray Values(Luminance)-How bright is the
color.
10.What does Computer animation refer?
Computer
animation refers to any time sequence of visual changes inscene. It display time
variations in object size,color,transparency & surface texture.
11.What is Frame-by-Frame animation?
Frame-by-Frame
animation is an animation in which each frame of the scene is separately
generated and stored.
12.What does story board define?
The story
board is an outline of the action. It defines the motion sequence as a set of
basic events that are to take place.
13.What
is Graphics editor?
The
graphics editor allows designing and modifying object shapes, using spline
surfaces, constructive solid geometry methods,or other representation schemes.
14.What is Morphing?
Transformation of object shapes from
one form to another is called morphing.
15.What is OPENGL?
OpenGL
stands for Open graphics library. OpenGL provides a set of commands to render a
3D scene i.e., the data is provided in an OpenGL usable form and OpenGL will
show this data on the screen.
16.Write
down the Skeleton of an event driven program using OpenGL? Void main()
{
Initialize things
Set the display mode
Create a screen window
Register the call back functions
Perhaps initialize other things
Enter the unending main loop
}
17.Give the format OpenGL vertex command? The OpenGL vertex
command
contains
The prefix “gl” indicates a function
from the OpenGL library.
The basic command root
The number of arguments being sent to
the function
The type of argument.
18.What is the use of glPointSize()?
The
glPointSize() is used to set the size of a point which takes one floating point
argument.
Syntax
glPointSize(Glfloat
size)
where
size specifies the diameter of
rasterized points the default is 1.0
19.What is the Modelview Matrix?
The modelview matrix is the CT. It combines the following 2
effects
Modelling tranformations on objects
the transformation that orients and
positions the camera in space.
20.What is the Viewport Matrix?
The viewport matrix maps the standard cube into a 3D viewport
Whose x
and y values extend across the viewport and whose z component extends from 0 to
1.
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