Entity Picking

Blitz3D Forums/Blitz3D Programming/Entity Picking

Knight #51

(Posted 2008) [#1]

Could somebody please show me how to test if an entity was picked? I'm using this:

;test dummy

dummy = CreateCube()
ScaleEntity dummy,100,100,100
EntityPickMode dummy,3,True
PositionEntity dummy,1,-10,1
EntityColor dummy,0,0,255

.....

If MouseDown (1) Or JoyDown (1)

PickedEntity = CameraPick (camera, MouseX (), MouseY ())

;if we are picking

If PickedEntity

If PickedEntity = dummy

FreeEntity dummy

EndIf

CreateFlame (PickedX (), PickedY (), PickedZ (), fire)

EndIf

EndIf

xmlspy

(Posted 2008) [#2]

I suggest you use this code starting after the If MouseDown(1) or Joydown(1)

CameraPick(camera, mousex(), mousey())
If PickedEntity() = dummy then freeentity dummy : CreateFlame(pickedx(), pickedy(), pickedz(), fire)

I hope you add more than just one dummy box to your game ;) And also if you have a low poly mesh you want to pick then make sure that you use EntityPickMode dummy,2

Knight #51

(Posted 2008) [#3]

Thanks. I've been messing around with entity picking a I've come up with some cool stuff. I saw an example in the blitz programs and that explanned alot :). Oh and don't wory, the dummy was just a test;I will have alot of objects to shoot at :). Here is the code I came up with:

Function CheckPicking()

If MouseDown(1)

CameraPick(cam1,MouseX(),MouseY())

If terrain = CameraPick(cam1,MouseX(),MouseY())

CreateExplosion(PickedX(),PickedY(),PickedZ(),0)

ElseIf water = CameraPick(cam1,MouseX(),MouseY())

CreateExplosion3D(PickedX(),PickedY(),PickedZ (),1,200,230,255,False,water_sprite)

EndIf

EndIf

End Function

Note. "CreateExplosion" and "CreateExplosion3D" are just functions I made.

GIB3D

(Posted 2008) [#4]

Wow that's a lotta pickinz

Here's a better way ;)

Function CheckPicking()

If MouseDown(1)

CameraPick(cam1,MouseX(),MouseY())

If terrain = PickedEntity()

CreateExplosion(PickedX(),PickedY(),PickedZ(),0)

ElseIf water = PickedEntity()

CreateExplosion3D(PickedX(),PickedY(),PickedZ (),1,200,230,255,False,water_sprite)

EndIf

EndIf

End Function

or

This checks if there's a picked entity and THEN does the other If's

Function CheckPicking()
	If MouseDown(1)
	
		CameraPick(cam1,MouseX(),MouseY())
			If PickedEntity() <> 0
				If terrain = PickedEntity()
					CreateExplosion(PickedX(),PickedY(),PickedZ(),0)
					
					ElseIf water = PickedEntity()
					
					CreateExplosion3D(PickedX(),PickedY(),PickedZ (),1,200,230,255,False,water_sprite)
				EndIf
			EndIf
	
	EndIf
End Function

Knight #51

(Posted 2008) [#5]

I tried that but It didn't work out to well. :(

gameproducer

(Posted 2008) [#6]

Debuglog different variables (like:
Function CheckPicking()
If MouseDown(1)

CameraPick(cam1,MouseX(),MouseY())
debuglog "terrain:"+terrain+", water:"+water+"pickedEntity:"+PickedEntity()
If PickedEntity() <> 0

[/code]
Then go debugging, and see if you actually pick anything... and where the problem lies.