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What is this effect called, and how do I implement it?


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#1 Knight52   Members   -  Reputation: 171

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Posted 14 March 2013 - 08:50 AM

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcRMWXOg2UVZAWt2o_JkN4mCMY6j2CyszDm8Qhp1cEP4Hvue2G3n">https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcRMWXOg2UVZAWt2o_JkN4mCMY6j2CyszDm8Qhp1cEP4Hvue2G3n

The trail of the wisp. What is it called, and how do I implement it with DirectX 9?

Edited by Knight52, 14 March 2013 - 08:52 AM.


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#2 CC Ricers   Members   -  Reputation: 623

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Posted 14 March 2013 - 01:14 PM

It looks like it could be a triangle strip or fan with an alpha blended texture, stretched in one direction to give the streak-like appearance. With the texture, it may be best to make it yourself. I would make it white with varying levels of alpha on the streaks, so this way you can tint it to different colors on the shader.


Because you're using DirectX9, you would have to update these triangles on the CPU side, generating them where you want that wisp effect to trail.

 

The bits of fire on the end can be particles generated from the ends of the triangle strip.


Edited by CC Ricers, 14 March 2013 - 01:17 PM.

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#3 dpadam450   Members   -  Reputation: 886

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Posted 14 March 2013 - 02:40 PM

geometry with an alpha texture....

What looks like is going on is for each rendered frame, they save the position and orientation of the weapon. With that they save simple quad and have a tiled texture applied. Each new quad would then be connected to the previous quads verts however you want to calculate that and thats probably it. You can write a shader to move the tiled texture so the flames look like they are moving instead of static.



#4 scniton   Members   -  Reputation: 252

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Posted 14 March 2013 - 03:01 PM

The effect is called "ribbon trail."


Stop twiddling your bits and use them already!

#5 SUN SONS   Members   -  Reputation: 148

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Posted 15 March 2013 - 09:27 PM

ribbon trail


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