FinalExam Flashcards
(19 cards)
What axis(es) does Direct3D use in conjunction with the texture coordinate system?
u, v
Which address mode allows you to tile a texture repeatedly over some surface?
wrap
True or False
Direct3D uses a texture coordinate system that consists of a u axis that runs vertically and a v axis that runs horizontally.
False
True or False
The clamp address mode is the default address mode.
False
Texture _____________ is a technique that allows us to map image data onto a triangle.
mapping
What are the two types of interpolation that graphics hardware supports?
constant interpolation and linear interpolation
Texture data is normally accessed in a ________shader.
pixel
A pair of u, v coordinates identifies an element on a texture called a _________
texel
Linear interpolation is __________than constant interpolation but still wouldn’t look good in a higher resolution.
smoother
What type of filter helps alleviate the distortion that occurs when the angle between a polygon’s normal vector and a camera’s look vector is wide?
anisotropic filter
What are the four types of address modes?
wrap, border color, clamp, and mirror
Explain the term minification and what technique is used to correct the problem..
Too many texels are being mapped to too few pixels. It is the opposite of magnification. You can use the technique of mipmapping to fix this problem.
True or False
Texture coordinate transformations are done just like regular transformations.
True
Due to__________, the alpha channel can get blurred a bit, so you should leave some buffer room when clipping pixels.
filtering
The idea of combining the pixel values that are currently being rasterized with the pixel values previously rasterized is called___________
blending
The __________channel of the diffuse map is used to control transparency.
alpha
To completely reject a source pixel from being further processed, you use what HLSL function?
clip
The alpha effects the __________of a graphic object.
transparency
What is the term that refers to an object that was previously behind the far plane all of a sudden coming visible?
popping
