OpenGL Computer Graphics

What is the dimensions of a 3D transformation matrix

• 2x2

• 4x4

• 3x3

• 3x4

Can you specify the location of a light source in OpenGL?

• Yes

• No

What should be done to rotate around a point that is not the origin?

• Translate to origin, rotate about origin, then translate back to original position

• Rotations can only be performed around the origin.

• Perform a glRotate and specify the point to rotate around

What does GLUT stands for

• opengl graphics Library

• opengl utility toolkit

• opengl utility library toolkit

What does glMaterialf(…) do?

• Turns material properties on.

• Defines the material properties of a drawn object for visual effects

• Switches to material mode to add visual effects.

• Gets the current material properties of a drawn object

What is the difference between glColor3d and glColor3f?

• glColor3d only sets RGB, while glColor3f sets R,G,B and A

• glColor3d allows 3d color operations, while glColor3f only allows 8-bit

• glColor3d takes double arguments, while glColor3f takes float arguments

• glColor3d is in real space, glColor3f is in integer space

If lighting is disabled, which function specifies the color of the vertex?

• glClearColor()

• glDisplayfunc()

• glColor()

• None of These

opengl function to set the window size

• glutinitwindowSize()

• gltinitwindowsize()

• glutInitWindowSize()

• gluInitWIndowSize()

Default matrix mode in opengl

• GL_PROJECTION

• GL_MODELVIEW

Origin for object co-ordinate is

• Top Left

• Bottom Left

• Top Right

• Bottom Right