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Video controller: A Fixed area of the system memory controller for the frame buffer, and the video controller is given direct access to the frame – buffer memory, frame – buffer locations, and the corresponding screen positions are referenced in Cartesian coordinates for many graphic computer, monitors, the coordinates origin is defined at the lower left screen corner. Figure. The screen surface is then represented as the first quadrant of a two – dimensional system with positive x value, increasing to the right and positive y values increasing from bottom to top. on some personal computer, the coordinate origin is referred as the upper left corner of the screen, so the y values are invented. Scan line are then labeled from y max at the top of the screen to 0 at the bottom. Along each scan line screen pixel positions are labeled from 0 to ax max, figure. The basic refresh operations of the video controller are shown in diagram. Two registers are used to store the coordinates of the screen pixels. Initially the x register is set to x and y register is set to y m frame buffer for this pixel position is then retrieved and used to set the intensity of the CRT beam. Since the screen must be referred at the rate of 60 frames per second, the simple procedure illustrated in figure cannot be accommodated by typical RAM chips. The cycle times is too slow.
Principal vanishing point write respect to Z-axis Principal vanishing point w.r.t z-axis: By the 3rd row of matrix equation, we declare that the principal vanishing point w
Film - Applications for Computer Animation Computer animation has turn into regular and accepted in particular effects. Movies as "Jurassic Park", "Terminator 2: Judgment Day"
Distinguish between convex and concave polygons? If the line joining any two points in the polygon lies totally inside the polygon then, they are called as convex polygons. If
What do you mean by emissive and non-emissive displays? EMISSIVE: The emissive display changes electrical energy into light energy. The plasma panels, thin film ele
Vanishing Point - Viewing Transformations This point is that point at those parallel lines shows to converge and vanish. A practical illustration is a long straight railroad
What is Transformation? Transformation is the process of introducing changes in the shape size and orientation of the object using scaling rotation reflection shearing & trans
what are the advertising effects of scan conversion
Clipping and 3D Primitives This unit introduces you to three important concepts of Computer Graphics. After that discusses the concept of clipping, which means removal of objec
Horizontal Retrace - Hardware Primitives Horizontal retrace refers to the time an electron beam takes to traverse a scan line.Vertical retrace means the time taken by the elect
Sprite animation interactive, may be non rectangular (Computer games) In its simplest form it is a 2-D graphic object which moves across the display. Sprites frequently can hav
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