Computer graphics questions pdf

The transformation in which the dimension of an object are changed relative to a specified fixed point is called a Rotation b Reflection c Translation d Scaling Ans: Scaling The transformation that produces a parallel mirror image of an object are called a Rotation b Reflection c Translation d Scaling Ans: Reflection If a point x,y is reflected about an axis which is normal to the XY plane and passing through the origin, the reflected point X,Y is:- a x,-y b -x,y c -x,-y d y,x Ans: -x,-y Reflection of a point about x-axis, followed by a counter-clockwise rotation of , is equivalent to reflection about the line?

A circle, if scaled only in one direction becomes a? Which of the following points are also on circle? Which of the following is not a rigid body transformation?

Two consecutive translation transformation t1 and t2 are a Additive b Multiplicative c Subtractive d none of above Ans: Additive Two consecutive rotation transformation r1 and r2 are a Additive b Multiplicative c Subtractive d none of above Ans: Additive Two consecutive scaling transformation s1 and s2 are a Additive b Multiplicative c Subtractive d none of above Ans: Multiplicative The process of mapping a world window in world coordinate system to viewport are called a Transformation viewing b Viewport c Clipping window d Screen coordinate system Ans: Transformation viewing The process of extracting a portion of a database or a picture inside or outside a specified region are called a Transformation b Projection c Clipping d Mapping Ans: Clipping The rectangle portion of the interface window that defines where the image will actually appear are called a Transformation viewing b View port c Clipping window d Screen coordinate system Ans: View port The phenomenon of having a continuous glow of a beam on the screen even after it is removed is called as?

Coordinates of window are knows as Coordinates of viewport are known as The region against which an object is clipped is called a The region code of a point within the window is According to Cohen-Sutherland algorithm, a line is completely outside the window if Ans: The region codes of line endpoints have a '1' in same bit position.

The region code of a point is The point is in the The result of logical AND operation with endpoint region codes is a nonzero value. Which of the following statement is true? The left L bit bit of the region code of a point X,Y is '1' if The right bit R bit of the region code of a point X,Y is '1' if The bottom bit of the region code of a point is '0' if A method used to test lines for total clipping is equivalent to the Sutherland Hodgeman algorithm works well for A transformation that slants the shape of an object is called The text clipping strategy to reject an entire character string that overlaps a clip window is called The object refers to the 3D representation through linear, circular or some other representation are called a Quadric surface b Sweep representation c Torus d None of these Ans: Sweep representation A quad-tree is a data structure which is used for graphical representation of A octree is a data structure which is used for alternative representation of How many data elements for each region in quad-tree data structure a 2 b 4 c 8 d 6 Ans: 4 How many data elements for each region in octree data structure a 2 b 4 c 6 d 8 Ans: 8 Wire frame model b Composite transformation c Constructive solid geometry methods d None Ans: Constructive solid geometry methods The operation that is used for repositioning the object is called a Rubber band method b Gravity method c Dragging d None Ans: Dragging Which method are used to construct and position the straight lines, arcs and circles etc.

Which are used to connect a line to already drawn line a Rubber band method b Gravity method c Dragging d None of these Ans: Gravity field The rubber band method is also applicable to Identify the data structures used to store the data about polygon surfaces a Vertex table b Polygon table c Edge table d All of the above Ans: All of the above Coordinate values for each vertex is stored in A triangular strip connected with 50 triangles connects When a circle is subjected to translational sweep, a A surface of revolution is generated by a A prism is generated by translational sweep of a Empty regions of the space are represented by type If all the pixels within an octant have the same color, it is referred to as A structure is created using the function Identify the following data structure.

Identify the data structures that works on divide and conquer strategy. All structures can be removed from the screen using the function The typical input operation in a general programming language will be in Identify the input mode in which the application program initiates data entry. The maximum number of devices that can provide input in request mode is When an input device is placed in event mode, data input from the device is accumulated in The device for specifying a coordinate position x,y is known as Which device is suitable to input a series of coordinate positions.

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Share via. Copy Link. Powered by Social Snap. Copy link. Copy Copied. Although the term often refers to the study of three-dimensional computer graphics, it also encompasses two-dimensional graphics and image processing. Computer graphics studies the manipulation of visual and geometric information using computational techniques. It focuses on the mathematical and computational foundations of image generation and processing rather than purely aesthetic issues.

Computer graphics is often differentiated from the field of visualization, although the two fields have many similarities. One of the first displays of computer animation was Futureworld , which included an animation of a human face and hand—produced by Ed Catmull and Fred Parke at the University of Utah.

There are several international conferences and journals where the most significant results in computer graphics are published. The subfield of geometry studies the representation of three-dimensional objects in a discrete digital setting. Because the appearance of an object depends largely on its exterior, boundary representations are most commonly used.

Two dimensional surfaces are a good representation for most objects, though they may be non-manifold.