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Basic definitions of object oriented programming concepts for interviews

Niteesh kumar November 01, 2017

Triangle scaling in computer graphics

Transformation of any object in a 2D or 3D plane means the change in the looks of the object by applying certain rules. Scaling- It is one of the transformation technique. Scaling changes the size of an object.This operation is carried out in any polygon by multiplying the scaling factor (Sx,Sy) with each vertex coordinate value (x,y) of the polygon.This results in transform coordinates (x',y') and then we plot the transformed coordinates. Here is the program to scale a triangle so Let's suppose (x1,y1) (x2,y2) (x3,y3) are the coordinates of a triangle and the scaling factor is (Sx,Sy) then transform coordinates will be- (x1',y1')=(Sx*x1,Sy*y1) (x2',y2')=(Sx*x2,Sy*y2) (x3',y3')=(Sx*x3,Sy*y3) One thing you need to keep in mind that th...

Program for 3D transformation-Scaling

We require three dimensional geometric and co-ordinate transformation to change the view of a three dimensional object.Three dimensional transformations are extended from two dimensional transformations by considering the 'z' co-ordinate also in the plane.Just like two dimensional transformation in three dimensional transformations are formed by composing three basic transformations of translation, scaling and rotation. Here we are going to discuss about the scaling. What is scaling? A scaling transform can be used to make objects bigger or smaller. Mathematically, a scaling transform simply multiplies each x-coordinate by a given amount and each y-coordinate by a given amount. That is, if a point ( x , y ) is scaled by a factor of a in the x direction and by a factor of d in the y direction, then the resulting point ( x1 , y1 ) is given by ...

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