here a ruw sample from the quick demo I've sended you earlyer.
where white was no hit, black hit. Say very simple primary ray raytracer.
private function someImage():void
{
_tracemap.lock();
var intersectP:Number3D;
var i:int;
var j:int;
var k:int;
var l:int;
var r:int = 255;
var g:int = 255;
var b:int = 255;
var startx:int = _view.x-Math.round(_width*.5);
var starty:int =_view.y-Math.round(_height*.5)
var pixel:Number3D;
var meshlength:int = _meshes.length;
var faces:Vector.<Number3D>;
var faceslength:int;
for(i = 0; i<_width;++i){
startx++;
for(j = 0; j<_height;++j){
pixel = _view.camera.unproject(startx,
starty+j);
_dir.x = pixel.x;
_dir.y = pixel.y;
_dir.z = pixel.z;
_dir.normalize();
for(k = 0; k<meshlength;++k){
faces = _meshes[k];
faceslength = faces.length;
for(l = 0; l<faceslength;l+=3){
intersectP =
_ray.getIntersect(_dir, pixel, faces[l], faces[l+1], faces[l+2]);
RayDebugger.traceRayFromDir(pixel, _dir, 2500);
if (intersectP != null)
_tracemap.setPixel(i, j, r << 16 | g << 8 | b );
}
}
}
}
_tracemap.unlock();
[... some uninterresting code...]
Fabrice
On Aug 25, 2010, at 4:06 PM, Michael Iv wrote:
> Got you , no I haven't seen the FITC presentation yet . By the way ,still
> can't get ray.getIntersect() returning the data besides null.
> If you could show some source code if a test run it could be nice.Although I
> am almost sure I do it just as it has to be .
>
> Thanks a lot .
> Michael.
>
> On Wed, Aug 25, 2010 at 5:00 PM, Fabrice3D <[email protected]> wrote:
> As usual works just fine for me :))
> I haven't added it exactly for what I suppose you want to do.
> It was added to allow the retrieving of uv's,map,meshname from a hittest
> result performed by the BSP.
> Look at BSPHittest code if you want to see how the class was used.
> (If you have followed the livestream from FITC where Rob showed the FPS demo
> we've builded, then you know now how the rockets were builded.) :)
>
> If you ensure that the position you test on is a result of a plane/ray hitest
> where the position is on the "plane" of the triangle
> then it should result in what you need: that is being used as test point in
> triangle. UV returned would be null if not inside.
>
> I wouldn't be honest not adding that I think very soon make some speed
> compairs with the ray intersect implementation I have in Prefab replaced with
> this class...
> so the class might evolve bits.
>
> Fabrice
>
>
> On Aug 25, 2010, at 3:12 PM, Michael Iv wrote:
>
>> hey Fabrice , is BaryCentricTest is like Ray.getIntersect() but for UV
>> coords >?
>>
>> Doest it work fine ? (Unlike Ray.getIntersect() ;) );
>> BaryCentricTest
>>
>>
>> On Wed, Aug 25, 2010 at 3:33 PM, Fabrice3D <[email protected]> wrote:
>> http://code.google.com/p/away3d/source/browse/#svn/trunk/fp10/Away3D/src/away3d/tools/utils
>>
>> here you go.
>>
>> Fabrice
>> On Aug 25, 2010, at 2:18 PM, Bobby wrote:
>>
>> > Hi Edwin,
>> > I am using the away3d_2_5_0 version. I have the away3d_3_5_0
>> > also with me. But in both these I cannot find utils folder with the
>> > tools package. How can I overcome this error. I am using the
>> > downloaded zip files from the Away 3D site. I am not using SVN. Is
>> > that causing the problem. CAN ANYONE HELP ME !!!!!!!!!!!!!!
>> >
>> > Thanks in Advance
>> > Bobby Francis Joseph
>>
>>
>>
>>
>> --
>> Michael Ivanov ,Programmer
>> Neurotech Solutions Ltd.
>> Flex|Air |3D|Unity|
>> www.neurotechresearch.com
>> http://blog.alladvanced.net
>> http://www.meetup.com/GO3D-Games-Opensource-3D/
>> Tel:054-4962254
>> [email protected]
>> [email protected]
>>
>
>
>
>
> --
> Michael Ivanov ,Programmer
> Neurotech Solutions Ltd.
> Flex|Air |3D|Unity|
> www.neurotechresearch.com
> http://blog.alladvanced.net
> http://www.meetup.com/GO3D-Games-Opensource-3D/
> Tel:054-4962254
> [email protected]
> [email protected]
>
