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POAbout: Rectangle rotation and fitting
 

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  1. POAbout: Rectangle rotation and fitting
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    <p>after a hard work, my brain turns out of service.. (it is 11:40 P.M. in Turkey)</p> <p>I am doing a rotation job.:</p> <p>variables:</p> <pre><code>_cx = horizontal center of rect _cy = vertical center of rect _cos = cos value of current angle _sin = sin value of current angle to rotating any point in this rect : function getx(x, y) { return _cx + _cos * (x - _cx) - _sin * (y - _cy); } function gety(x, y) { return _cy + _sin * (x - _cx) + _cos * (y - _cy); } </code></pre> <p>I am trying to do resize given rectangle before rotation process to maximum size what fitted in original bounds.. how could I do?</p> <p>thanks your advance</p> <p><strong>EDIT : Igor Krivokon's solution</strong></p> <p>The problem is solved by Igor Krivokon, and here is the modified version of that solution what works for every angle value</p> <pre><code>var h1:Number, h2:Number, hh:Number, ww:Number, degt:Number, d2r:Number, r2d:Number, deg:Number, sint:Number, cost:Number; //@angle = given angle in radians //@r is source/target rectangle //@d2r is static PI / 180 constant for degree -&gt; radian conversation //@r2d is static 180 / PI constant for radian -&gt; degree conversation d2r = 0.017453292519943295769236907683141; r2d = 57.295779513082320876798154814105; deg = Math.abs(angle * r2d) % 360; if(deg &lt; 91) { degt = angle; }else if(deg &lt; 181){ degt = (180 - deg) * d2r; }else if(deg &lt; 271){ degt = (deg - 180) * d2r; }else{ degt = (360 - deg) * d2r; } sint = Math.sin(degt); cost = Math.cos(degt); h1 = r.height * r.height / (r.width * sint + r.height * cost); h2 = r.height * r.width / (r.width * cost + r.height * sint); hh = Math.min(h1, h2); ww = hh * r.width / r.height; r.x = (r.width - ww) * .5; r.y = (r.height - hh) * .5; r.height = hh; r.width = ww; </code></pre> <p>Thanks</p>
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    1. USTolgahan Albayrak
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    1. COQuick clarification, you have a rectangle R and you want to rotate and scale it about its center to produce a rectangle R' that takes up as much of the area in R as possible?
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      1. USKevin Loney
    2. COHi Tolgahan, You cannot posibly answer this without knowing at least the relationship between the sides of the rectangle.
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    3. COYes, and i want to have R' before rotating
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      1. USTolgahan Albayrak
 

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