| 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(-12, -5, 24, 10);
} |
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| 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 due the the structure of calculating the tangent. | ||||
| Syntax | atan2(y, x); |
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| Parameters |
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| Usage | Web & Application | ||||
| Related | tan() |
This reference is licensed under the CC BY-NC-SA 2.0 license:
