Sun that Expands?

devsh · Post by **devsh** » Mon May 18, 2009 4:56 pm

Hi everyone,

how do I do a sun that gets bigger when its more toward center of the screen??

I tried everything with shaders but i simply cannot do it..

JP · Post by JP » Mon May 18, 2009 5:20 pm

Scale it based on how close it is to the centre of the screen?

I'm not sure why you'd want to do it though...

Wrong forum, incidentally

devsh · Post by **devsh** » Mon May 18, 2009 8:23 pm

yeah but i dont know how to calculate how close it is to center of the screen!

cr33 · Post by **cr33** » Mon May 18, 2009 9:17 pm

i don't know how to get node position on screen, but you could use getRayFromScreenCoordinates() or camera->getTarget(), then compare make vertex that is in same distance as sun and then compare it's distance to it. i mean like this:

Code: Select all

center
 ------   sun
|     /
|   /
| /
|/
camera

i guess it's not the most efficient way to do this, but it's just idea

also, maybe this could help:
http://irrlicht.sourceforge.net/phpBB2/ ... hp?t=31365

Jookia · Post by **Jookia** » Tue May 19, 2009 2:04 am

If you're looking at the direction of the sun, compare the x position. To make it bigger use setScale.

devsh · Post by **devsh** » Tue May 19, 2009 6:52 pm

dude's thank you SOOO MUCH

it's the line

I can compare the camera target normal against the sun position (also turned into normal) and then do same as in lighting!!!