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DarkBASIC Professional Discussion / How do I make an object metaly

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Wik
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Posted: 9th Oct 2003 00:38
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On the box it sayd that you can create a "metalic shine."

If it's with sphere mapping, then how do you get it to work?

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Hamish McHaggis
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Posted: 9th Oct 2003 01:03
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Get a texture of your surroundings (a room is good) and use that for sphere mapping. Not just a plain texture.

Brains are for idiots.

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BatVink
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Posted: 9th Oct 2003 01:37
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There's a good example in the tutorials folder - nice spacecraft that couldn't get any shinier!

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Wik
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Posted: 9th Oct 2003 04:29
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Can someone plaese make a demo with a shiny black sphere?

Thanks

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Phaelax
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Posted: 9th Oct 2003 05:20
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Just change the image to something you like. Though sphere mapping on a sphere won't look like much. The way the object gets its effect is by its rotation. Rotating a sphere will always look the same from every angle.


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Bulleyes
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Posted: 9th Oct 2003 15:32
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Depends what kind of metalic you want. If you need a 100% reflective surface (like mirror), then sphere mapping is the way to go. But what you need is just to have metalic look surface, then what you need to do is just set the specular color via SET OBJECT SPECULAR and SET OBJECT SPECULAR POWER.

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Van B
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Posted: 9th Oct 2003 15:34
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Sphere mapping is one way, I use it alot because it does'nt kill the frame rate - I reckon the advertisement is referring to pixel shaders. Take a look back at newsletter issue 8(I think), and get the Alienware media demo - that shows a nice example of a metallic shader effect on an alien model with a metal suit - also shows shadows. Shaders will only work on a decent spec graphics card, shadows and sphere/cube mapping works fine on my GeForce2. Remember to error trap your hardware shaders loading code, you would'nt want to stop lower spec users from being able to play your stuff.


Van-B

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BatVink
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Posted: 9th Oct 2003 16:05
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Quote: "shadows and sphere/cube mapping works fine on my GeForce2"


I have a GeForce2, shadows work, but the error trapping says that it's not available?!?!

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David T
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Posted: 9th Oct 2003 19:40
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For metallic lighting check out the aniso.fx shader that comes with DBP - it's under one of the 3d showcases.

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zircher
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Posted: 10th Oct 2003 03:18
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It also massively helps to use "set normalization on". I find it kind of brain dead that normals are not on by default.
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Van B
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Posted: 10th Oct 2003 11:43
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Batvink,

I thought that too, I only discovered that shadows were supported when I ran that Alienware demo. I have a GF2 440mmx 64mb - nothing special, so your GF2 should support shadows too.


Van-B

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