Dot3 only supports directional lights, since the nature of directionals offer it a very fast way to calculate lighting.
Now, as for why the directional light doesn't have a position: don't consider it as a specific light source. Instead, it's typically used for a strong light source very far away, such as the sun. Of course, it's an approximation, but again it offers optimizations. The idea is that wherever you are in the scene, the light always comes from the same direction (hence the name). If it were to have a position, then the light direction would change depending on where the lit object is relative to the light (and that is a point light). Hope that clarifies a thing or two! David On Mon, Jun 7, 2010 at 10:50 AM, Michael Iv <explomas...@gmail.com> wrote: > I did it with PhongColorMaterial actually . Don't know why it doesn't work > with Dot3 I will try to check it too. > > > On Mon, Jun 7, 2010 at 11:47 AM, Josh <doubleclickd...@getrehab.com>wrote: > >> I'm having the same problem Michael, however I can't seem to get the >> PointLight3D to work with Dot3BitmapMaterials. does anyone know if >> Dot3s support pointLights? >> >> On Jun 7, 8:44 am, Michael Iv <explomas...@gmail.com> wrote: >> > It is hard to understand why directional lights position doesn't make >> sense >> > . I mean , take 3d modelling program ,or UDK or Unity(ok that is not the >> > same in terms of technology ) , but the light should have emission >> source >> > and the soruce should have a position in 3d space ? . and the source >> > position of DirectionalLight3D is in the center of the scene, So if my >> > object is not offset from the center ,there is a problem , the object >> > doesn't receive the light at all . And .direction doesn't help in this >> case, >> > I was trying to tweak it too without much success . Eventually used >> > PointLight3d. >> > >> > >> > >> > On Mon, Jun 7, 2010 at 10:35 AM, richardolsson <r...@richardolsson.se> >> wrote: >> > > The direction property is the way to go. As of 3.5, directional lights >> > > don't have positions, which never made sense anyway since dir lights >> > > are orthographic in a way, and not to be considered as point in space >> > > -- they are infinitely far away. >> > >> > > If you cannot get direction to work like below, make sure you are >> > > using materials that support dir lights! >> > >> > > var light : DirectionalLight3D = new DirectionalLight3D; >> > > light.direction = new Number3D(0, -1, 0); // Downward >> > >> > > Cheers >> > > /R >> > >> > > On Jun 5, 10:15 pm, fab4ce <wiedenstr...@gmail.com> wrote: >> > > > Hi Fabrice, >> > >> > > > PointLight3D has a position property, but DirectionalLight3D doesn´t >> > > > have it. >> > >> > > > On 5 Jun., 19:53, Fabrice3D <fabric...@gmail.com> wrote: >> > >> > > > > there is a position property >> > >> > > > > Fabrice >> > > > > On Jun 5, 2010, at 2:08 AM, fab4ce wrote: >> > >> > > > > > Hi all, >> > > > > > after updating to the new version 3.5 i had to change my >> directional >> > > > > > light from view.scene.addChild(light) to >> view.scene.addLight(light); >> > > > > > How can change my code for positioning the light in the scene? I >> was >> > > > > > using the .x and .y and .z properties of the light object. >> > >> > -- >> > Michael Ivanov ,Programmer >> > Neurotech Solutions Ltd. >> > Flex|Air >> |3D|Unity|www.neurotechresearch.comhttp://blog.alladvanced.nethttp:// >> www.meetup.com/GO3D-Games-Opensource-3D/ >> > >> Tel:054-4962254begin_of_the_skype_highlighting 054-4962254 >> end_of_the_skype_highlighting >> > explomas...@gmail.com >> > t...@neurotech.co.il > > > > > -- > 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 > explomas...@gmail.com > t...@neurotech.co.il > > -- http://www.derschmale.com
