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1  Game Development / Game Mechanics / Re: Corners of rotated rectangle wrong on: 2014-03-02 10:12:21
Ok I found the wrong line Tongue
Thanks for your help  Grin
2  Game Development / Game Mechanics / Re: Corners of rotated rectangle wrong on: 2014-03-01 21:04:07
After a few tries I noticed that even if the angle is 0 the rotation is wrong.



But I have no idea why  Grin
3  Game Development / Game Mechanics / Corners of rotated rectangle wrong on: 2014-03-01 19:32:42
I have a problem calculating the corners of a rotated rectangle.
For the calculation I use a rotation matrix but there is somewhere a little mistake in my code.

As you can see the corners have a wrong positions but were rotated correctly.
Code:

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corners[0] = translatePoint(x, y);
corners[1] = translatePoint(x + width, y);
corners[2] = translatePoint(x + width, y + height);
corners[3] = translatePoint(x, y + height);

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private Point translatePoint(double x, double y) {
        double xNew = (x * Math.cos(getAngleInRadians()) - y * Math.sin(getAngleInRadians()));
        double yNew = (x * Math.sin(getAngleInRadians()) + y * Math.cos(getAngleInRadians()));
        return new Point(xNew, yNew);
}


(x,y) is the left top corner of the unrotated rectangle.

Thank you for your help!

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