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| Name |
atan2() |
| 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 |
| y |
float: y-coordinate of the point |
| x |
float: x-coordinate of the point |
|
| Returns | float |
|---|
| Related | tan()
|
|---|
Updated on May 19, 2014 05:29:59pm PDT
