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13 Cards in this Set

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Point Coordinate Systems: "object"
The coordinate system in which the current geometric primitive is defined. The modeling transformation converts from object coordinates to world coordinates
Point Coordinate Systems: "world"
The standard reference coordinate system. The camera transformation converts from world coordinates to camera coordinates
Point Coordinate Systems: "camera"
A coordinate system with the vantage point at the origin and the direction of view along the positive z-axis. The projection and screen transformation convert from camera coordinates to screen coordinates
Point Coordinate Systems: "screen"
The 2-D normalized coordinate system corresponding to the image plane. The raster transformation converts to raster coordinates
Point Coordinate Systems: "raster"
The raster or pixel coordinate system. An area of 1 in this coordinate system corresponds to the area of a single pixel. This coordinate system is either inherited from the display or set by selecting the resolution of the image desired
Point Coordinate Systems: "NDC"
Normalized device coordinates � like "raster" space, but normalized so that x and y both run from 0 to 1 across the whole (un-cropped) image, with (0,0) being at the upper left of the image, and (1,1) being at the lower right (regardless of the actual aspect ratio).
Format( Int xresolution, Int yresolution, Float pixelaspectratio )
Set the horizontal (xresolution) and vertical (yresolution) resolution (in pixels) of the image to be rendered. viewportaspectratio = (xresolution * pixelaspectratio) / yresolution
ScreenWindow( Float left, Float right, Float bottom, Float top )
This procedure defines a rectangle in the image plane that gets mapped to the raster coordinate system and that corresponds to the display area selected
CropWindow( Float xmin, Float xmax, Float ymin, Float ymax )
Render only a sub-rectangle of the image.
Projection( Token name, ...parameterlist... )
The projection determines how camera coordinates are converted to screen coordinates, using the type of projection and the near/far clipping planes to generate a projection matrix.
Clipping( Float near, Float far )
Sets the position of the near and far clipping planes along the direction of view
ClippingPlane ( Float nx, Float ny, Float nz, Float x, Float y, Float z)
Adds a user-specified clipping plane
DepthOfField ( Float fstop, Float focallength, Float focaldistance )
focaldistance sets the distance along the direction of view at which objects will be in focus. lensdiameter = focallength/fstop