True or false 1.World coordinates and viewing coordinates are always identical?
ID: 3854039 • Letter: T
Question
True or false 1.World coordinates and viewing coordinates are always identical? 2. Let T be a 2 x 2 translation matrix and R be a 2x 2 rotation matrix. (T*R) is always equal to ( R*T) 3. Surface normal is one of the parameters used to calculate diffuse lighting 4. The ordered dither technique overlays a pattern on an image to simulate an atmospheric or fogging effect.True or false 1.World coordinates and viewing coordinates are always identical? 2. Let T be a 2 x 2 translation matrix and R be a 2x 2 rotation matrix. (T*R) is always equal to ( R*T) 3. Surface normal is one of the parameters used to calculate diffuse lighting 4. The ordered dither technique overlays a pattern on an image to simulate an atmospheric or fogging effect.
1.World coordinates and viewing coordinates are always identical? 2. Let T be a 2 x 2 translation matrix and R be a 2x 2 rotation matrix. (T*R) is always equal to ( R*T) 3. Surface normal is one of the parameters used to calculate diffuse lighting 4. The ordered dither technique overlays a pattern on an image to simulate an atmospheric or fogging effect.
Explanation / Answer
1. FALSE
The coordinates in which you build the complete scene are called world coordinates. These are the coordinates for the overall scene, the imaginary 3D world that you are creating, while viewing coordinates are (almost) the coordinates that you actually want to use for drawing on the screen. The transform from world coordinates to viewing coordinates is called the viewing transformation.
2. FALSE
T*R can be equal to both +R*T and -R*T, depending on the coordinates. So the given statement is false.
3. TRUE
The parameters used for calculating Surface Lighting are:
4. TRUE
The Ordered Dither Technique achieves dithering by applying a threshold map M on the pixels displayed, causing some of the pixels to be rendered at a different color, depending on how far in between the color is of available color entries, thereby creating a fogging effect. Hence, the given statement is true.
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