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Author Topic: SIr's 3d program  (Read 8232 times)

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SirCmpwn

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Re: SIr's 3d program
« Reply #30 on: March 03, 2011, 01:14:13 am »
Not using matricies, using straight up lists.  The equations are here, I use the non-matrix forms.
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Offline Builderboy

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Re: SIr's 3d program
« Reply #31 on: March 03, 2011, 01:16:41 am »
How is it not projection?  It rotates and everything :D
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SirCmpwn

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Re: SIr's 3d program
« Reply #32 on: March 03, 2011, 01:20:26 am »
Perspective projection is different.  Notice how in the screenies in this thread, the back of the box is visually smaller than the front?
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Offline Builderboy

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Re: SIr's 3d program
« Reply #33 on: March 03, 2011, 01:28:40 am »
So you're telling me this isn't perspective projection?

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SirCmpwn

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Re: SIr's 3d program
« Reply #34 on: March 03, 2011, 01:29:27 am »
Wow, that looks right!  Did he use some clever hacks?  Because that stuff is CPU intensive.
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Offline Builderboy

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Re: SIr's 3d program
« Reply #35 on: March 03, 2011, 01:37:20 am »
No idea, but it should be in the demo programs so you should check it out! :D
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SirCmpwn

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Re: SIr's 3d program
« Reply #36 on: March 03, 2011, 01:38:49 am »
Will do :)
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Offline Quigibo

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Re: SIr's 3d program
« Reply #37 on: March 03, 2011, 03:26:52 am »
Actually, if I remember correctly, the engine already works the way you want it to (other than clipping).  It just reads a list of lines in the form of [x1y1z1x2y2z2]... and then draws them all each render.  So just by editing this, you could get any shape.

Also, perspective 3d is not much more cpu intensive than ortho, it only requires one extra division per z-coordinate.
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Offline LincolnB

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Re: SIr's 3d program
« Reply #38 on: October 31, 2011, 10:23:25 am »
Hey, kind of a necropost, but I was thinking, with Jacobly's new Floating Point math axiom, this might be able to convert to Axe.
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Offline aeTIos

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Re: SIr's 3d program
« Reply #39 on: October 31, 2011, 10:26:23 am »
But same speed.
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Re: SIr's 3d program
« Reply #40 on: October 31, 2011, 04:33:24 pm »
It could definitively be a good project, although since floating points are slow, I wonder if the speed increase from BASIC to Axe will be signifiant at all, if there's even a speed increase althogether?
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Offline ben_g

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Re: SIr's 3d program
« Reply #41 on: October 31, 2011, 05:18:14 pm »
with 8.8 fixed-point, it's possible to do perspective projection is possible, and doesn't axe supports that?
Fixed-point should be a lot faster than floating point, and might make it fast enough for use in games.
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Offline LincolnB

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Re: SIr's 3d program
« Reply #42 on: October 31, 2011, 07:19:51 pm »
Right, you could use fixed point as well...
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