Save object with rescaling? - GameCreators Forum

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Rudolpho

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Joined: 28th Dec 2005

Location: Sweden

Posted: 23rd Jan 2013 17:01 Edited at: 23rd Jan 2013 17:02

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I'm trying to do some preprocessing of 3D models by allowing them to be rescaled when being imported by my engine. I would have thought it would just be a matter of repositioning its vertices but this doesn't appear to work even when using the vertexbuffer lock flag of 2, which the documentation seems to hint is for this purpose.
I've tried this; when saved and loaded back in the object is of its original size again:

+ Code Snippet

function resizeObject(obj as dword, scale as float)
    lock vertexdata for limb obj, 0, 2
    verts = get vertexdata vertex count() - 1
    for v = 0 to verts
        x# = get vertexdata position x(v) * scale
        y# = get vertexdata position y(v) * scale
        z# = get vertexdata position z(v) * scale
        set vertexdata position v, x#, y#, z#
    next v
    unlock vertexdata
endfunction

Do anybody have any ideas about this?

"Why do programmers get Halloween and Christmas mixed up?"

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Because Oct(31) = Dec(25)

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chafari

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Joined: 2nd May 2006

Location: Canary Islands

Posted: 24th Jan 2013 00:47

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Hi Rudolpho. To save an object afer scaling, in other to keep the new size...instead of scaling our object, what we have to do is :
scale limb my_obj,0,new_size,new_size,new_size and after that:
save object "my_obj_scaled.dbo",my_obj

Now when we load the new object, it has different size comparing with the first one.

Cheers.

I'm not a grumpy grandpa

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Rudolpho

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Joined: 28th Dec 2005

Location: Sweden

Posted: 26th Jan 2013 02:53

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Oh, will that work?
Fishy... I guess my main point here was that it seems that you can't save the edited vertex data though, even if you use the flag which supposedly is for indeed saving it.
But I will try and use your solution if it works, thanks

"Why do programmers get Halloween and Christmas mixed up?"

+ Code Snippet

Because Oct(31) = Dec(25)

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mr Handy

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Joined: 7th Sep 2007

Location: out of TGC

Posted: 4th Feb 2013 07:40 Edited at: 4th Feb 2013 07:46

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+ Code Snippet

make object sphere 1,2
make object box 2,3,1,1

resizeobject(1,1.5)

if file exist("test.dbo") then delete file "test.dbo"
save object "test.dbo",1
delete object 1
load object "test.dbo",1

do
    sync
LOOP

function resizeObject(obj as dword, scale as float)
lock vertexdata for limb obj, 0, 2
verts = get vertexdata vertex count() - 1
for v = 0 to verts
x# = get vertexdata position x(v) * scale
y# = get vertexdata position y(v) * scale
z# = get vertexdata position z(v) * scale
set vertexdata position v, x#, y#, z#
next v
unlock vertexdata
endfunction

works fine.

*** Merry Chuckmas! ***

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Rudolpho

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Joined: 28th Dec 2005

Location: Sweden

Posted: 6th Feb 2013 02:52

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Hm, yes, turned out the problems I was having was due to using Enhanced Animations with the object to be saved, which implores its own limb-based position, rotation and scalings

"Why do programmers get Halloween and Christmas mixed up?"

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Because Oct(31) = Dec(25)

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