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Direct3D -> 2D Part 2, Faking Light!!
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| Submitted on: |
3/2/2001 10:13:16 AM |
| By: |
Mark van Renswoude
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| Level: |
Intermediate |
| User Rating: |
By 19 Users |
| Compatibility: |
VB 4.0 (32-bit), VB 5.0, VB 6.0 |
| Views: |
25769 |
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After figuring out how to rotate 2D sprites using Direct3D (check my other submissions), I wanted to do lighting. After reading some tutorials I gave up, they all used 3D, while I wanted to do 2D. There are other ways of faking light; making tiles in multiple shades at either design time or run time, but they're limited...
So here it is: faked light using Direct3D to simulate 2D! It looks great, runs fast (if you've got a 3D card, my P133 with Voodoo 3 could easily run it, although not on software rendering mode), and allows dynamic setting of light brightness and color.
So how does it work? Easy: it sets the color of a vertex (corner) to the brightness of the light at that specific place, after which Direct3D automatically adjusts the texture!
Some limitations though:
- Light might seem choppy when moved (like in the example), but static lights will do much better... the smaller the tiles, the less you'll notice it, but I didn't want to fill the screen with 8x8 sized tiles...
- This won't work with multiple lights or multiple colors of lights, you'll need to adjust some algorithms for that to work. I'm working on this problem, if I finish it, I'll post it here offcourse.
Enjoy, and don't forget to leave comments and vote!
(You're free to use this code in your own programs/games, but I would appreciate it if you gave me some credit, thanks!)
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Other User Comments
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 3/2/2001 3:06:45 PM: Chris
If you do finish this, I hope I don't miss it...5/5
(If this comment was disrespectful, please report it.)
| 4/29/2001 7:35:50 AM: Filip
Great code! 5 globes!
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| 4/28/2002 2:28:08 PM: Shibaji Datta Gupta
Hi Mark
What a nice program!!!I am totally amazed...
I am Shibaji from India,a IT graduate(3rd year),and i am very interested in DirectX and OpenGL programming thru VB.
I have started DirectX...I will be very
benefited if you can help me learning
these subjects with some tutorial or coding...
Thanks
Shibaji
sdg_80@yahoo.co.in
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| 9/14/2002 4:27:54 AM: Andrew Thorpe
this is a pile of doo doo - what the hell does it do except not work?
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| 1/16/2003 3:03:13 PM:
This code works good, and I am using it in a rpg game I'm working on. Nice work! 5 globes!
(If this comment was disrespectful, please report it.)
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