SCALING Scaling is a kind of transformation in which the size of an object is changed. Remember the change is size does no mean any change in shape. This kind of transformation can be carried out for polygons by multiplying each coordinate of the polygon by the scaling factor. Sx and Sy which in turn produces new coordinate of (x,y) as (x',y'). The equation would look like or here S represents the scaling matrix. NOTE: If the values of scaling factor are greater than 1 then the object is enlarged and if it is less that 1 it reduces the size of the object. Keeping value as 1 does not changes the object.   Uniform Scaling: To achieve uniform scaling the values of scaling factor must be kept equal. Differential Scaling: Unequal or Differential scaling is produce incases when values for scaling factor are not equal. As per usual phenomenon of scaling an object moves closer to origin when the values of scaling factor are less than 1. To prevent object from moving or changing its position while is scaling we can use a point that is would be fixed to its position while scaling which is commonly referred as fixed point (xf yf).