What is the process of window to viewport transformation?
Window to Viewport Transformation is the process of transforming 2D world-coordinate objects to device coordinates. Objects inside the world or clipping window are mapped to the viewport which is the area on the screen where world coordinates are mapped to be displayed.
How do you convert a window to viewport transform in computer graphics?
Matrix Representation of the above three steps of Transformation:
- Step1:Translate window to origin 1. Tx=-Xwmin Ty=-Ywmin
- Step2:Scaling of the window to match its size to the viewport. Sx=(Xymax-Xvmin)/(Xwmax-Xwmin)
- Step3:Again translate viewport to its correct position on screen. Tx=Xvmin
Which transformation is referred to as window to viewport transformation of windowing transformation?
• Window to Viewport Mapping- Mapping of a part of a world coordinate scene to device coordinate is referred to as a viewing transformation.
How is window to viewport mapping attained?
The mapping of window to viewport also can be achieved by performing following transformations:
- By performing scaling transformation using a fixed-point position of (Xwmin, Ywmin) that scales the window area to the size of the viewport area.
- By translating the scaled window area to the position of the viewport area.
What is the difference between window and viewport in computer graphics?
The window, in effect, defines the portion of the graph that is to be displayed in world coordinates, and the viewport specifies the area on the device on which the image is to appear.
Why is viewing transformation needed?
Remember that purpose of the viewing transformation is to orient the objects in a coordinate system where the center of projection is located at the origin. This coordinate system is called either eye space or camera space.
What is the difference between window port and viewport?
Difference between Window Port and Viewport Window port is the coordinate area specially selected for the display. Viewport is the display area of viewport in which the window is perfectly mapped.
What is difference between window and viewport?
A window defines a rectangular area in world coordinates. A viewport defines in normalized coordinates a rectangular area on the display device where the image of the data appears. You define a viewport with the GPORT command.
What is a window in CG?
The method of selecting and enlarging a portion of a drawing is called windowing. The area chosen for this display is called a window. The window is selected by world-coordinate. Viewport: An area on display device to which a window is mapped [where it is to displayed]. …
What is difference between window port and viewport?
The main difference between window port and view port is that window port is a world coordinate area selected for displaying while view port is a device coordinate area that locates the scene on the device. Overall, window port and view port are two ways of displaying objects in computer graphics.
What viewport defines?
A viewport is a region of the screen used to display a portion of the total image to be shown. In virtual desktops, the viewport is the visible portion of a 2D area which is larger than the visualization device.
What is meant by viewing transformation?
Viewing Transformation is the mapping of coordinates of points and lines that form the picture into appropriate coordinates on the display device. Mapping the window onto a subregion of the display device called the viewport is called the Viewing Transformation.
How does the window to viewport transformation work?
Window to Viewport Transformation is the process of transforming 2D world-coordinate objects to device coordinates. Objects inside the world or clipping window are mapped to the viewport which is the area on the screen where world coordinates are mapped to be displayed. Window – It is the area on world coordinate selected for display.
How is the clipping window and the viewport used?
The viewport is rectangular area on screen where world coordinates are mapped to be displayed. • In other words, the clipping window is used to select the part of the scene that is to be displayed. The viewport is used to display selected portion of window on the output device. 4. Window to viewport transformation 5.
Where does the image appear in the viewport?
Viewport(Image Subspace) −A rectangle on the raster graphics screen (or interface window) defining where the image will appear, usually the entire screen or interface window. −Thus, in principle, the same image can be replicated on different viewports inside the screen or interface window.
How to translate scaled window to viewport?
Translate the scaled window area to the position of the viewport. Relative proportions of objects are maintained if the scaling factors are the same (sx=sy). From normalized coordinates, object descriptions are mapped to the various display devices.