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what you mean by parallel projection parallel projection is one in which z coordinates is discarded and parallel lines from every vertex on the
what is view distance the view plane normal vector is a directed line segment from the view plane to the view reference point the length of this
what are the steps involved in 3d transformation modeling transformation projection transformationviewing transformation workstation
define octrees hierarchical tree structures called octrees are used to show solid objects in some graphics systems medical imaging and other
what is a blobby object some objects do not handle a fixed shape but change their surface characteristics in sure motions or when in proximity to
what is cubic spline cubic splines are a straight forward extension of the methods underlying parabolic spline the total curve in this case is a
what do you mean by parabolic splines for parabolic splines a parabola is fitted by the first three points p1 p2p3 of the data array of kot points
differentiate among interpolation spline and approximation spline when the spline curve passes by all the control points then it is known as
what are the important properties of bezier curve it requires only four control points it always passes by the first and last control points
what are the different ways of specifying spline curve using a set of boundary conditions that are imposed on the spline using the state matrix
what is the use of control points spline curve can be specified by giving a set of coordinate positions known as control points which shows the
what is a spline to produce a smooth curve by a designed set of points a flexible strip called spline is used like spline curve can be
define b-spline curve a b-spline curve is a set of piecewise usually cubic polynomial segments that pass close to a set of control points though
what are the advantages of rendering by patch splitting i it is fast-especially on workstations with a hardware polygon-rendering pipeline ii
what are the advantages of rendering polygons by scan line method i the max and min values of the scan were simply found ii the intersection of
write short notes on rendering bi-cubic surface patches of constant u and v method the simple way is to draw the iso-parmetric lines of the
what is surface patch a single surface element can be explained as the surface traced out as two parameters u v take all possible values between 0
what is polygon mesh polygon mesh is a method to show the polygon when the object surfaces are tiled it is more convenient to state the surface
what are the various representation schemes used in three dimensional objects boundary representation b-res - explain the 3 dimensional objects as
list out the various text clipping all-or-none string clipping -if all of the string is inside a clip window keep it or else discards all-or-none
distinguish between bitblt and pixblt raster functions that manipulate rectangular pixel arrays are usually referred to as raster ops moving a
define affine transformation a coordinate transformation of the form x axxx axyybx y ayxxayy yby is known as a two-dimensional affine
what is reflection and clippingthe reflection is actually the transformation that makes a mirror image of an object for this use some angles and
what is scaling and shearingthe scaling transformations alters the shape of an object and can be carried out by multiplying every vertex xy by
what is rotation a 2-d rotation is completed by repositioning the coordinates with a circular path in the x-y plane by making an angle with the