here is the sample i am currently using to test picking. as for a reference, the functions are named the same as the corrosponding B3D functions so check the online reference for B3D if you can. also, i have most of the functions documented so they should show up under the BMAX module documentation.
SuperStrict
Framework Irrlicht.B3D
ib3d_Graphics3D(640,480)
Local cam:CAMERA=ib3d_CreateCamera()
ib3d_PositionEntity(cam,80,30,30)
Local syd:MESH=ib3d_LoadAnimMesh("sydney.md2")
Local tex:TEXTURE=ib3d_LoadTexture("sydney.bmp")
ib3d_EntityTexture(syd,tex)
ib3d_PositionEntity(syd,10,0,30)
Local LIGHT:LIGHT=ib3d_CreateLight()
ib3d_CameraClsColor(0,0,0)
ib3d_EntityDebugDataVisible(syd,True)
ib3d_NameEntity(syd,"SYD")
ib3d_NameEntity(cam,"CAM")
ib3d_EntityRadius(cam,30)
ib3d_EntityOffset(cam,0,10,0)
ib3d_EntityType(cam,1)
ib3d_EntityType(syd,2)
ib3d_EntityType(syd,1)
Local done:Int=False
Local current:Int=0
Local zoom:Float=1.0
Local controlled:ib3d_Entity=cam
Local projmode:Int=1
Local cnt:Int=0
Local cube:PRIMITIVE=ib3d_CreateCube()
ib3d_PositionEntity(cube,10,80,30)
ib3d_NameEntity(cube,"CUBE")
cube._node.setID(2)
Local sphere:PRIMITIVE=ib3d_CreateSphere()
ib3d_EntityPickMode(sphere,PM_BOX)
ib3d_PositionEntity(sphere,10,125,30)
ib3d_NameEntity(sphere,"SPHERE")
Local speed:Float=.05
ib3d_PointEntity(cam,sphere)
Local fnt:FONT=ib3d_LoadImageFont("fonthaettenschweiler.bmp",18)
ib3d_SetImageFont(fnt)
ib3d_SetFontColor(255,0,0)
While Not ib3d_KeyDown(EKEY_ESCAPE)
If ib3d_KeyDown(EKEY_KEY_Z) Then zoom:+0.005
If ib3d_KeyDown(EKEY_KEY_X) Then zoom:-0.005
If ib3d_KeyDown(EKEY_LEFT) Then ib3d_TurnEntity(controlled,0,-speed,0)
If ib3d_KeyDown(EKEY_RIGHT) Then ib3d_TurnEntity(controlled,0,speed,0)
If ib3d_KeyDown(EKEY_UP) Then ib3d_TurnEntity(controlled,speed,0,0)
If ib3d_KeyDown(EKEY_DOWN) Then ib3d_TurnEntity(controlled,-speed,0,0)
If ib3d_KeyDown(EKEY_SPACE) Then ib3d_TurnEntity(controlled,0,0,speed)
If ib3d_KeyDown(EKEY_NUMPAD9) Then ib3d_MoveEntity(controlled,0,speed,0)
If ib3d_KeyDown(EKEY_NUMPAD3) Then ib3d_MoveEntity(controlled,0,-speed,0)
If ib3d_KeyDown(EKEY_NUMPAD6) Then ib3d_MoveEntity(controlled,speed,0,0)
If ib3d_KeyDown(EKEY_NUMPAD4) Then ib3d_MoveEntity(controlled,-speed,0,0)
If ib3d_KeyDown(EKEY_NUMPAD8) Then ib3d_MoveEntity(controlled,0,0,speed)
If ib3d_KeyDown(EKEY_NUMPAD2) Then ib3d_MoveEntity(controlled,0,0,-speed)
If ib3d_KeyDown(EKEY_KEY_U) Then ib3d_TurnEntity(controlled,0,0,-speed)
If ib3d_KeyDown(EKEY_KEY_Y) Then ib3d_TurnEntity(controlled,0,0,speed)
If ib3d_KeyDown(EKEY_KEY_T) Then ib3d_TrackEntity(cam)
If ib3d_KeyDown(EKEY_KEY_V) Then ib3d_PointEntity(syd,sphere)
If ib3d_KeyHit(EKEY_KEY_O) Then
If projmode=1 Then projmode=2 Else projmode=1
ib3d_CameraProjMode(cam,projmode)
EndIf
Local picked:ib3d_Entity=ib3d_EntityPick(syd)
If picked Then
DebugLog(MilliSecs()+" | "+ib3d_EntityName(picked))
EndIf
If ib3d_KeyHit(EKEY_KEY_C) Then
If current=0 Then
current=1
controlled=syd
Else
current=0
controlled=cam
EndIf
EndIf
ib3d_UpdateWorld()
ib3d_DrawText("This is my test text",10,10)
ib3d_DrawLine3df(ib3d_LastPickRay(),255,0,0)
ib3d_DrawTriangle3df(ib3d_PickedTriangle(),255,0,0)
ib3d_RenderWorldBegin()
ib3d_RenderEntities()
ib3d_RenderDrawCmds()
ib3d_RenderGUI()
ib3d_RenderWorldEnd()
cnt:+1
Wend
ib3d_FreeEntity(syd)
ib3d_EndGraphics()