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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  
Level: Intermediate
User Rating: By 17 Users
Compatibility:VB 4.0 (32-bit), VB 5.0, VB 6.0

Users have accessed this code 8960 times.
 

 
     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...<br><br> 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.<br><br> 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!<br><br><br> Some limitations though:<br><br> <ul> <li> 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...<br> <li> 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. </ul><br><br> Enjoy, and don't forget to leave comments and vote!<br><br><br> (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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By using this code, you agree to the following terms...   
1) You may use this code in your own programs (and may compile it into a program and distribute it in compiled format for languages that allow it) freely and with no charge.   
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Other 7 submission(s) by this author

 

 
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Other User Comments
3/2/2001 3:06:45 PM:Chris
If you do finish this, I hope I don't 
miss it...5/5
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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!
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