On Feb 17, 2005, at 1:00 PM,
realbasic-games-request at lists dot realsoftware dot com wrote:
No, that's not the case. Remember that a Group3D IsA Object3D. So,
Rb3DSpace.Objects.Item(4) may be a Group3D or it may be some other
sort of Object3D.
The funny thing is that all Group3D objects return a index of 0
(not nil, since they are the first objects I appended to the
RB3D-Space), and the next appended object3D returns it's logically
following index number.
I don't understand what you mean by "returns" -- I see the index as
something you plug into the Item accessor to look up an object, not
something you get back from some other method.
Greetings,
Firstly excuse my inaccurate use of language (my professional medium is
rather plants and dirt, not OOP). After reading your suggestions I
looked very closely at what is happening. You are right (of course).
The index of the Rb3DSpace in fact correctly reflects each Groupd3D
appended to it. The actual problem is this:
In the game there are a number of objects the user can control (for
this example let's asume they are three). They are stored in an global
array. The array has been declared to be of MyObjects type. MyObjects
is a subclass of Group3D and has a bunch of additional properties. I
use the array index to refer to the object the user has currently
selected and is getting instructions.
I tried following code to select the object the user has clicked on in
the Rb3DSpace MouseUp event (MouseDown simply returns true):
Dim which as Object3D
dim id as integer
which=me.FindObject(x,y)
if which=nil then return
for id=0 to NumMyObjects // this property stores the number of
user-controlable objects in the game
if MyObjectsArray(id)=which then exit
next
if id=NumShips+1 then Return
and so on // the rest of the code handles the change over to the
selected object , which i hoped to be MyObjectsArray(id).
The thing is, the 3D geometry of all the Group3D objects stored in
MyObjectsArray is the same (they are cloned). Because of this I suspect
the comparison "if MyObjectsArray(id)=which" resolves to true for all
the objects in the array, and thus I was always ending up with the
index id=0, which missled me to believe all the indexes of the Group3D
objects were 0.
I run a hoop around this problem by using this comparison instead:
if MyObjectArray(id).Position.x=which.Position.x and
MyObjectArray(i).Position.z=which.Position.z then exit // y-dimension
has no relevance
As mentioned, this works, but if the player clicks on the gunturret of
the Group3D there is no selection, because the coordinates are
different.
No, all positions are global, and BTW, if you just want the position
clicked you should be using FindPoint, not FindObject. But see above
-- the correct solution really is to use FindObject and not worry
about the point clicked at all.
Yes, confirmed that too, so I would need to do a comparison to the
gunturret-coordinates too, but I was hoping to avoid this. I don't like
to many if, if ,if lines in my code.
Cool, I'm excited about your project too. Have any screen shots to
share?
Well, I might have something available as soon as it may be deemed
worhty to be shown around (maybe 1 or 2 months). For now imagine nicely
rendered, detailless objects with elegant animation in a vast, as of
yet empty expanse. I was more advanced in the spritesurface version,
but I needed to take a few steps back to recode for Rb3DSpace. Catching
up fast, though.
Cheers,
Heinz Jose
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