[Papervision3D] Drawing Circles

[Carlos Ulloa]

Since last sunday. :)

Check out Mr Lindquist's tutorial from the next day:

http://pv3d.org/2008/12/08/vectorvision-hello-world/

C4



On 10 Dec 2008, at 13:45, Pablo Lemos wrote:

> Since we´re talking about vectors...
> Mark, Seb, core team: when VectorVision will be just Papervision?
>
> Pablo Cabana
> (21) 9338-0388
> Cabana Criação
> (21) 2707-7020
> www.cabanacriacao.com
> Visite também o Cabanoblog:
> www.cabanacriacao.com/blog
>
> ----- Original Message ----- From: "Seb Lee-Delisle" <sebstar55 at gmail.com 
> >
> To: <papervision3d at osflash.org>
> Sent: Wednesday, December 10, 2008 11:15 AM
> Subject: Re: [Papervision3D] Drawing Circles
>
>
>> ah yes erm... i really need to learn vectorvision... sorry Mark!
>>
>> Seb Lee-Delisle
>> Technical Director
>> pluginmedia.net
>>
>>
>>
>>
>> On Wed, Dec 10, 2008 at 12:34 PM, Mark Barcinski  
>> <barcinski at gmail.com> wrote:
>>> :)
>>>
>>> On Dec 10, 2008, at 1:19 PM, Seb Lee-Delisle wrote:
>>>
>>>> Here's my Circle3D class that extends Lines3D, and draws a  
>>>> perfectly
>>>> smooth curved circle or arc. Hope it helps! Same licence as the  
>>>> rest
>>>> of the Papervision3D code.
>>>>
>>>> Seb Lee-Delisle
>>>> Technical Director
>>>> pluginmedia.net
>>>>
>>>>
>>>> -----------------------------------------------------------------------------------------------------
>>>>
>>>> package net.pluginmedia.pv3d
>>>> {
>>>>       import org.papervision3d.core.geom.Lines3D;
>>>>       import org.papervision3d.core.geom.renderables.Line3D;
>>>>       import org.papervision3d.core.geom.renderables.Vertex3D;
>>>>       import org.papervision3d.core.math.Number3D;
>>>>       import org.papervision3d.materials.special.LineMaterial;
>>>>
>>>>       public class Circle3D extends Lines3D
>>>>       {
>>>>               public function Circle3D(mat:LineMaterial, radius :
>>>> Number=100,
>>>> divisions : int = 8, lineWeight : Number = 2, startAngle : Number  
>>>> = 0,
>>>> endAngle : Number = 360)
>>>>               {
>>>>                       super(mat);
>>>>                       addCircle(0,0,0,radius, divisions,  
>>>> startAngle,
>>>> endAngle, lineWeight);
>>>>               }
>>>>
>>>>               public function addCircle(x:Number, y:Number,  
>>>> z:Number,
>>>> r:Number,
>>>> d:Number = 8, startAngle:Number =0, endAngle:Number = 360,
>>>> linethickness:Number = 2):void
>>>>               {
>>>>                       var temp : Number3D = new Number3D(r,0,0);
>>>>                       var tempcurve:Number3D = new Number3D(0,0,0);
>>>>                       var joinends : Boolean;
>>>>                       var i:int;
>>>>                       var pointcount : int;
>>>>
>>>>                       var angle:Number = (endAngle-startAngle)/d;
>>>>                       var curveangle : Number = angle/2;
>>>>
>>>>                       tempcurve.x = r/Math.cos(curveangle *
>>>> Number3D.toRADIANS);
>>>>                       tempcurve.rotateY(curveangle+startAngle);
>>>>
>>>>                       if(endAngle-startAngle<360)
>>>>                       {
>>>>                               joinends = false;
>>>>                               pointcount = d+1;
>>>>                       }
>>>>                       else
>>>>                       {
>>>>                               joinends = true;
>>>>                               pointcount = d;
>>>>                       }
>>>>
>>>>
>>>>
>>>>                       temp.rotateY(startAngle);
>>>>
>>>>                       var vertices:Array = new Array();
>>>>                       var curvepoints:Array = new Array();
>>>>
>>>>                       for(i = 0; i< pointcount;i++)
>>>>                       {
>>>>                               vertices.push(new Vertex3D(x+temp.x,
>>>> y+temp.y, z+temp.z));
>>>>                               curvepoints.push(new
>>>> Vertex3D(x+tempcurve.x, y+tempcurve.y, z+tempcurve.z));
>>>>                               temp.rotateY(angle);
>>>>                               tempcurve.rotateY(angle);
>>>>                       }
>>>>
>>>>                       for(i = 0; i < d ;i++)
>>>>                       {
>>>>                               var line:Line3D = new Line3D(this,  
>>>> material
>>>> as LineMaterial,
>>>> linethickness, vertices[i], vertices[(i+1)%vertices.length]);
>>>>                                
>>>> line.addControlVertex(curvepoints[i].x,
>>>> curvepoints[i].y,
>>>> curvepoints[i].z );
>>>>
>>>>                               addLine(line);
>>>>                       }
>>>>
>>>>
>>>>
>>>>               }
>>>>
>>>>       }
>>>> }
>>>>
>>>>
>>>> ----------------------------------------------------------------------------------------------------
>>>>
>>>>
>>>>
>>>> On Wed, Dec 10, 2008 at 12:14 PM, James <pv3d at zavoo.com> wrote:
>>>>>
>>>>> You could try drawing the circle on a Shape.
>>>>> Then convert the Shape to a material on a Plane.
>>>>>
>>>>> James
>>>>>
>>>>> Sascha wrote:
>>>>>>
>>>>>> Is there a good method to draw a 3D Circle with PV3D? The  
>>>>>> closest thing
>>>>>> I've
>>>>>> found so far is a Bezier3D but a circle should be much easier  
>>>>>> to draw
>>>>>> than
>>>>>> with these. I need this to represent the Orbit of several Planets
>>>>>> orbiting
>>>>>> around a Star.
>>>>>>
>>>>>> Sascha
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
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>>>>>> Papervision3D at osflash.org
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>>>>>>
>>>>>>
>>>>>
>>>>>
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>>>>>
>>>>
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>>>
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>>
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