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Recommend Shadow Tech?

Started by MetaKnight May 6, 2004 at 11:52 PM 2 replies 450+ views

Original Post

May 6, 2004 at 11:52 PM

Hi, i was looking to learn a shadow technequiqe that i would be able to run on low hardware, like vs 2.0 max im using it for a RPG game where the player needs to cast a shadow, but the light would never change direction. The player animates also. So would anyone like to recomend any techquies to render the easyest fastest shadow to make? i dont really care too much about the quality. Ive read some of the tutorials here, but they seem much too slow even using vertex shaders, and also they seem like too much for what i want to do. thanks you ! [edited by - MetaKnight on May 6, 2004 12:52:57 AM]

Wavewash

May 7, 2004 at 12:17 AM

Depends on the poly count. Stencil Shadows as triangle count go up are fillrate dependent. Shadow mapping requires that you have access to the zbuffer. But if self shadowing isn''t really necessary then you can for go the zbuffer check and just render the model to texture and project it to the receiving geometry.
~Wave

MetaKnight

Author

MetaKnight

May 7, 2004 at 2:50 AM

ah i see thank you
so id want to setup the matrix to render the model from the lights view and then project that surface onto the land?
can you give me a lil pesudocode?

[edited by - MetaKnight on May 7, 2004 3:51:02 AM]

neneboricua19

May 7, 2004 at 1:17 PM

quote:
Original post by MetaKnight
Hi, i was looking to learn a shadow technequiqe that i would be able to run on low hardware, like vs 2.0 max

vs 2.0 is only available on DX9 class cards. If that''s the low end for you, what''s the high end??

As far as shadow techniques go, there are quite a number of them with varying levels of quality. A search in the Graphics Programming and Theory forum will give you tons of info.

There are three main techniques. Projected Shadows, Shadow Volumes, and Shadow Maps. Shadow Volumes and Shadow Maps are able to deal with fully dynamic scenes. But it seems like this might be a little more than you need in your situation.

neneboricua

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