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Newcomers DBPro Corner / Shadows

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Ub3rS0ldAt Patriot of War
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Joined: 8th Dec 2003
Location: United States! Support the Soldiers!
Posted: 22nd Jan 2004 04:54
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How do you have DBP cast shadows in realtime like this demo of DB classic (link to it at the bottom). Its not sharp shadows but a little more blurry, creating a realistic look. How can we do something like that. In my Crimson Skies clone i'm working on, i want to have the airplane to cast a shadow onto the terrain so it can show depth. And how do you have the terrain cast shadows. I don't have the money to buy geoscape 3d, so i have to find an alternative.

http://darkbasic.thegamecreators.com/?m=showcase_view&i=147


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Darkflame
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Joined: 4th Jul 2003
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Posted: 22nd Jan 2004 09:20
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That isnt really shadows, thats just basic lighting.
Mearly creating a light will do that.

If you want shadows, you can either use the slow, direct-x based stencil method (DBP only)
....or the fast but less accurate "black light" method.

Basicaly, if you want a ball to have a shadow, you have a black spotlight pointing at it so it casts a negative light on the ground
Works quite well but you gota get the angle and such right.
Also, the "ground" has to be a well subdivided mesh for it to look nice.

"The man who says it cannot be done is generally interrupted by someone doing it." ~ Elbert Hubbard
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walaber
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Location: Los Angeles, CA
Posted: 22nd Jan 2004 09:50
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sounds like a bit of a waste of polygons to me. just make an image for your shadow, texture it on a plane, ghost it, and place it slighty above the ground. many games use this techinque.

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Darkflame
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Posted: 22nd Jan 2004 14:30
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and what if the ground isnt flat?
Or the object moves near a light source?

The black-light techique is quite a bit more flexible, as the shadow will go on walls and such.

"The man who says it cannot be done is generally interrupted by someone doing it." ~ Elbert Hubbard
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PiratSS
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Posted: 22nd Jan 2004 15:05
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I thought of lightmaps, but now I believe you should use lights(dynamic). Not many games use this since it's SLOW.

Dual AMD Athlon MP 2x1GHZ | IBM 15000Rpm SCSI 73.4 Gb X 2 | e-GeForce Ti4400 | Audigy 2 + 7.1 Surround sound | 17' Monitor | Ugly mouse
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Ub3rS0ldAt Patriot of War
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Joined: 8th Dec 2003
Location: United States! Support the Soldiers!
Posted: 22nd Jan 2004 23:23
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So if I do just add a light, as the demo showed. It will then create shadowish effect? Am I right?


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