• Advertisement
Sign in to follow this  

Lesson 44

This topic is 3134 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Hi, Lesson 44 is the lens flare tutorial. Apparently, it has occlusion testing. If the situation is right, it can be done vastly more efficiently. In Python:
model = glGetDoublev(GL_MODELVIEW_MATRIX)
proj = glGetDoublev(GL_PROJECTION_MATRIX)
view = glGetIntegerv(GL_VIEWPORT)
winx,winy,winz = gluProject(lightpos[0],lightpos[1],lightpos[2],model,proj,view)
winz = glReadPixels(winx,winy,1,1,GL_DEPTH_COMPONENT,GL_FLOAT)
pos = gluUnProject(winx,winy,winz,model,proj,view)
#if pos and lightpos are basically the same and 0<winx<view[2] and
#0<winy<view[3], then the light is visible; draw the flare.
I used this technique to produce: The planet can occlude the sun's flare. It does so perfectly. Hope this helps, Geometrian

Share this post

Link to post
Share on other sites
Sign in to follow this  

  • Advertisement