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Polyphemus_ · Oct 16th, 2005, 6:15 AM

nice work

Sane · Oct 16th, 2005, 3:33 PM

Okay, I'm having troubles with using models now. The individual calculations for every single pixel to rotate, flatten then draw takes too long. A solid rotating cube (20 x 20) takes about 100 m/s per frame. So that's no good.

One step I'm taking is making it so it will exclude the flattened pixels of a same outputted (x, y). But I'm afriad that won't be enough.

As well, for a model that is 180 x 180 x 180, that's like 194 000 surface pixels, and array of that quantity can't be stored in Turing.

Polyphemus_ · Oct 16th, 2005, 4:13 PM

the speed problem also has to do with the fact it is not hardware accelerated, while engines like opengl and directx are.

Sane · Oct 16th, 2005, 5:15 PM

Interesting...

How does hardware accelartion work? Certain parts of the processor are built to function well for the calculations of those particular engines I'm guessing?

coldDeath · Oct 17th, 2005, 2:01 AM

I think it is to do with the Graphics Card.

Polyphemus_ · Oct 17th, 2005, 4:33 AM

Hardware acceleration is that the GPU (Graphic Processing Unit) on your graphics card does all the calculations. This means all the GPU time can work on the graphics, and the CPU can do other stuff. When the calculations are done on the CPU, you don't have all of the CPU time, since other applications are running on the background.

stevengs · Oct 17th, 2005, 7:17 AM

Furthermore, the GPU and memory/memory bus architecture is designed such that the calculations are highly optimized. The calculations can be performed much faster than the with the 'general purpose' system CPU. (besides the fact that the calculations are performed right at the exit point!) You do have to stick to the interface, however, to enjoy these performance gains.

I recommend checking out "OpenGL Programming Guide" - Woo, Neider, Davis and Shreiner, ISBN# 0201604582. I have the third edition, and am very happy with it.

Sane · Oct 17th, 2005, 4:10 PM

I can only use Turing. It's for school. And I want to do this 3d Airplane Fighting Simulator.

stevengs · Oct 17th, 2005, 5:51 PM

You might want to stick to wire-frame models, or very simple models. The CPU might manage that.

Sane · Oct 17th, 2005, 6:43 PM

Wire-frame models eh.... very nice idea. I like it. I will go for that.

Thanks.

Anyone have some airplane models they can export to a format Blender can handle?

Oct 17th, 2005, 2:01 AM	#35
coldDeath Expert Programmer Join Date: Aug 2005 Location: UK Posts: 862 Rep Power: 4	I think it is to do with the Graphics Card. __________________ Programming Tutorials - Linux Installation Guide - Learn Python - Learn C++ Got Slack? Join us at #programmingforums @ irc.freenode.net! My software never has bugs. It just develops random features.

Oct 17th, 2005, 7:17 AM	#37
stevengs Professional Programmer Join Date: May 2005 Location: Bad Nauheim, Germany Posts: 436 Rep Power: 4	Furthermore, the GPU and memory/memory bus architecture is designed such that the calculations are highly optimized. The calculations can be performed much faster than the with the 'general purpose' system CPU. (besides the fact that the calculations are performed right at the exit point!) You do have to stick to the interface, however, to enjoy these performance gains. I recommend checking out "OpenGL Programming Guide" - Woo, Neider, Davis and Shreiner, ISBN# 0201604582. I have the third edition, and am very happy with it. __________________ -Steven "Is this a piece of your brain?" - Basil Fawlty

Oct 17th, 2005, 5:51 PM	#39
stevengs Professional Programmer Join Date: May 2005 Location: Bad Nauheim, Germany Posts: 436 Rep Power: 4	You might want to stick to wire-frame models, or very simple models. The CPU might manage that. __________________ -Steven "Is this a piece of your brain?" - Basil Fawlty

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Oct 16th, 2005, 6:15 AM	#31
Polyphemus_ Expert Programmer Join Date: Aug 2005 Location: Rotterdam, the Netherlands Posts: 942 Rep Power: 4	nice work

Oct 16th, 2005, 3:33 PM	#32
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 2,189 Rep Power: 6	Okay, I'm having troubles with using models now. The individual calculations for every single pixel to rotate, flatten then draw takes too long. A solid rotating cube (20 x 20) takes about 100 m/s per frame. So that's no good. One step I'm taking is making it so it will exclude the flattened pixels of a same outputted (x, y). But I'm afriad that won't be enough. As well, for a model that is 180 x 180 x 180, that's like 194 000 surface pixels, and array of that quantity can't be stored in Turing.

Oct 16th, 2005, 4:13 PM	#33
Polyphemus_ Expert Programmer Join Date: Aug 2005 Location: Rotterdam, the Netherlands Posts: 942 Rep Power: 4	the speed problem also has to do with the fact it is not hardware accelerated, while engines like opengl and directx are.

Oct 16th, 2005, 5:15 PM	#34
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 2,189 Rep Power: 6	Interesting... How does hardware accelartion work? Certain parts of the processor are built to function well for the calculations of those particular engines I'm guessing?

Oct 17th, 2005, 4:33 AM	#36
Polyphemus_ Expert Programmer Join Date: Aug 2005 Location: Rotterdam, the Netherlands Posts: 942 Rep Power: 4	Hardware acceleration is that the GPU (Graphic Processing Unit) on your graphics card does all the calculations. This means all the GPU time can work on the graphics, and the CPU can do other stuff. When the calculations are done on the CPU, you don't have all of the CPU time, since other applications are running on the background.

Oct 17th, 2005, 4:10 PM	#38
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 2,189 Rep Power: 6	I can only use Turing. It's for school. And I want to do this 3d Airplane Fighting Simulator.

Oct 17th, 2005, 6:43 PM	#40
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 2,189 Rep Power: 6	Wire-frame models eh.... very nice idea. I like it. I will go for that. Thanks. Anyone have some airplane models they can export to a format Blender can handle?

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Programming Forums > Script Programming > Other Scripting Languages

3d Graphics.