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Name | atan2() |
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Examples | void draw() { background(204); translate(width/2, height/2); float a = atan2(mouseY-height/2, mouseX-width/2); rotate(a); rect(-30, -5, 60, 10); } | ||||
Description | Calculates the angle (in radians) from a specified point to the coordinate origin as measured from the positive x-axis. Values are returned as a float in the range from PI to -PI. The atan2() function is most often used for orienting geometry to the position of the cursor. Note: The y-coordinate of the point is the first parameter, and the x-coordinate is the second parameter, due the the structure of calculating the tangent. | ||||
Syntax | atan2(y, x) | ||||
Parameters |
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Returns | float | ||||
Related | tan() |
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