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Particle Engine problems

Started by retron Dec 4, 2001 at 9:23 AM 4 replies 250+ views

Original Post

Dec 4, 2001 at 9:23 AM

Hello everyone, this is my first time here on this forum... Hope youe are kind enough to help me, and not laugh at me if the problem is to easy to solve

I have made a little particle engine wich works just fine, besides the point that I always want the particles to face the camera if you understand what I mean, if i rotate around Y axis for example you can hardly see the particle and it''s all really ugly. (each particle is a quad) Thank you // Retron

TheSalmon

Dec 4, 2001 at 10:56 AM

Try a search on Billboarding and see if it gets you anywhere.

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No game will ever rule more than CBT!

retron

Author

retron

Dec 4, 2001 at 12:17 PM

Thanx, that helped, but there is still one problem... I still want to be able to rotate around my particles....

the way my code looks now:
(cmain is the main camera)

// ... some gl stuff ... //

glTranslated ( cmain.pos.x, cmain.pos.y, cmain.pos.z );
glRotated ( cmain.rot.x, 1.0, 0.0, 0.0 );
glRotated ( cmain.rot.y, 0.0, 1.0, 0.0 );
glRotated ( cmain.rot.z, 0.0, 0.0, 1.0 );

// ... draw stuff ... //

then before i draw the particles I inverse the rotation
glRotated ( cmain.rot.z, 0.0, 0.0, 1.0 );
glRotated ( cmain.rot.y, 0.0, 1.0, 0.0 );
glRotated ( cmain.rot.x, 1.0, 0.0, 0.0 );

// ... draw particles ... //

// ... some gl stuff ... //

the thing that happends is that the particles are always facing me, but I can''t rotate around them... :/...

// Retron

Ranger_One

Dec 7, 2001 at 7:51 PM

Nice code...

But code you provide the base geNormalize(), geNegate() etc. as well?

maybe I ask to much, but I have almost no basic math system yet for my software =/

Thanks,
Ranger

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