Relation between polar coordinate and cartesian system, Computer Graphics

Relation between polar coordinate system and Cartesian system

A frequently utilized non-cartesian system is Polar coordinate system. The subsequent figure A demonstrates a polar coordinate reference frame. Within polar coordinate system a coordinate position is identified via r andq, here r is a radial distance from the coordinate origin and q is an angular displacement from the horizontal as in figure 2A. Positive angular displacements are counter clockwise. Angle q is measured in degrees. One full counter-clockwise revolution regarding the origin is treated as 3600. A relation among Cartesian and polar coordinate system is demonstrated in Figure 2B.

1968_Relation between polar coordinate and Cartesian system.png

Figure: A polar coordinate reference-frame          Figure 2B: Relation between Polar and Cartesian coordinates

Consider a right angle triangle in Figure B. By utilizing the description of trigonometric functions; we transform polar coordinates to Cartesian coordinates:

x=r.cosθ

y=r.sinθ

 The opposite transformation from Cartesian to Polar coordinates is:

 r=√(x2+y2) and θ=tan-1(y/x)

Posted Date: 4/3/2013 5:08:23 AM | Location : United States







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