Irrlicht Engine

I want to create button, editbox which function like CGUIButton,CGUIEditBox, but I also want them can be moved along with camera like BillBoard. Any idea to achieve this? thanks a lot!

I have point O and 3 axis ox,oy,oz and I know the target O' and 3 axis - ox',oy',oz', how can I get the transform matrix from source->target? thanks.

The code works when I create object by using MeshSceneNode instead of OctTreeSceneNode.

Thanks a lot for all replys.

I wrote code below following your advice, however, the object doesn't resize as what I expect on screen. I call setDirty() for both mesh buffer and mesh. when debugging code, I found the mesh bounding box get changed and looks correct


scene::SMesh * mesh = (scene ...

Is it feasible to change position of vertices in mesh buffer at run time? If answer is yes, I need to add setVertex(int i) in this class because there is only get Vertex functions in CMeshBuffer.cpp, right? thanks.

I want to get object-aligned bounding box for a scene node, for example, if I rotate a cube, I want bounding box rotate same way too,so it is not axis aligned anymore, how do I get this bounding box? thanks.

Thanks a lot, you code is very helpful. Do you have idea to draw selection box with 8 control points along the side of box?

Thanks for your quick reply.

I think it is a 3D box, not 2D rectangle on certain plane. I think most commercial 3D software has this feature, I don't know how to implement it now.

when I click or highlight a 3D object, I want to draw selection box with control point around bounding box of this 3D object, also this selection box can be resized when mouse drag this object, like CRectTracker in microsoft MFC

Does any body know how to draw 3D selection box? thanks.

I want to implement a zoom locked function: the size of object is being locked within a range like 10-100 pixels, so no matter how far you zoom in/out, the object size will not beyond this range.

Does anybody have idea about it? thanks a lot in advance!

I want to add first person camera kind of rotation to maya camera. for example, when I press a certain key, the camera will be rotated like first person camera. after this key is release and move mouse, the camera is back to maya camera rotation.

I am newbie for 3D engine development, and any idea ...