Serialize in Newton - Problem - GameCreators Forum

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Derekioh

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Posted: 24th Feb 2011 22:56

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So i am trying to serialize an object in Newton and save it to a file to call later (since my object is so big I needed to do this). However, when i serialize it, it doesn't work (by that I mean it still takes just as long to load and doesn't have the correct collision shaped around it). Here is my code to create a file for Serializing:

+ Code Snippet

Input "file to serialize: ",file$

load object file$, 1

if file exist("Output.dat") =1 then delete file "Output.dat"

print "Now serializing object..."
col = NDB_NewtonCreateTreeCollision(1)
NDB_NewtonTreeCollisionSerialize col, "Output.dat"

if file exist("Output.dat")=1
	print "Serialize successful."
	print "Press any key to exit..."
	wait key
else
	print "Serialize failed!"
	print "Press any key to exit..."
	wait key
endif

function NeverCalled()
	if memblock exist(1) then delete memblock 1
	if mesh exist(1) then delete mesh 1
endfunction

I use the output in my main program, but the errors I described above happen. I tried using the flags for the col = NDB_NewtonCreateTreeCollision(1) command, but it just spits out an error. Any ideas?

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Derekioh

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Posted: 25th Feb 2011 03:53

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Surely there has been someone else whos used the Serialization in Newton and can help...

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tiresius

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Posted: 25th Feb 2011 06:25

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You may need to setup the Newton World in order for it to work.

I've used the code below for my specific purposes (creating collisions on a .X mesh) and it makes an Unoptimized collision. I haven't tried optimized collisions in a long long time due to the dodgy behavior in the 1.2+ version of Newton... so I don't know if that may be your problem.

+ Code Snippet

setupNewton()

input "Filename (no extension) to convert:", file$

if file exist(file$+".x") = 0
	print "File does not exist!"
	wait key
	end
else
	load object file$+".x", 1
	col = NDB_NewtonCreateTreeCollisionUnOptimized(1)
	NDB_NewtonTreeCollisionSerialize col, file$+".col"
	wait key
endif

NDB_NewtonDestroy

end

if memblock exist(1) then delete memblock 1
if mesh exist(1) then delete mesh 1

function setupNewton()
	` This initializes the Newton world.  This must be called before
	` any other calls can be made.
	NDB_NewtonCreate

	NDB_SetVector 1, -4000.0, -500.0, -4000.0
	NDB_SetVector 2, 4000.0, 500.0, 4000.0
	NDB_NewtonSetWorldSize
endfunction

Also if your model is really big you may want to use the "limb by limb" flag,

A 3D marble platformer using Newton physics.

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Derekioh

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Posted: 26th Feb 2011 01:50 Edited at: 26th Feb 2011 01:52

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Okay, that works for some of the smaller objects, but it won't work for the bigger ones. I use the limb by limb, but when it is doing the collision, it just tells that there is an error and the window needs to close.

EDIT: and I used unoptimized and it did work better, thanks. Still have the problem above though

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tiresius

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Posted: 26th Feb 2011 02:43

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It might be exceeding the allowable size of tree collisions in Newton wrapper. I don't know what that size is, but I have had to use chunking in some of my game's level geometry in order to work around it. How many polys are in these models? And is it broken up into several limbs?

A 3D marble platformer using Newton physics.

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Derekioh

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Posted: 26th Feb 2011 02:53

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I dont know how many polys (not to great at using 3D Max), but its just one level with 2 sections connected by a ramp. Does that help?

Also, what is chunking exactly?

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tiresius

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Posted: 26th Feb 2011 06:13

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Display the object on the screen (no Newton collision yet) and call function statistic(1) to see how many polys are on the screen. But there must be a way to get a full count in your 3D modeler. It doesn't sound very big from your description, but there's not much else to go on.

A 3D marble platformer using Newton physics.

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