What does 'd' stands for in - move(double dx, double dy)?

Question

I am reading a java doc for GObject /acm.graphics.

I am looking at this method:

move(double dx, double dy)

Moves the object on the screen using the displacements dx and dy.

I am trying to understand what does the 'd' stands for and what is the difference between (dx,dy) Vs (x,y)? Is there any difference or there is none and it is only a different name for the same coordinates?

It's just the name of the parameters. The d could stand for delta, difference, differential, displacement, etc... It doesn't really matter does it? — jodag, Aug 19 '16 at 05:54
`d` may stands for difference. `(dx, dy)` stands for change in x - coordinate and y - coordinates (relative to current). While (x, y) is commonly used to represent absolute location. — niyasc, Aug 19 '16 at 05:54

score 5 · Accepted Answer · edited Aug 19 '16 at 06:07

5

move(double dx, double dy) Moves the object on the screen using the displacements dx and dy.

In this context dx would be "displacement on the x-axis" and dy would be "displacement on the y-axis". The method would move the object dx units along the x-axis, and dy units along the y-axis, where the units are presumably pixels.

edited Aug 19 '16 at 06:07

Andrew Tobilko

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answered Aug 19 '16 at 06:04

jwaddell

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What does 'd' stands for in - move(double dx, double dy)?

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