2014/10/15 下午 10:04:35

iphone Programming Glossary: billboards

Scaling AR pictures based on the distance from the camera

http://stackoverflow.com/questions/11913355/scaling-ar-pictures-based-on-the-distance-from-the-camera

and a heading understood as an angle between its plane and the north direction axis . The goal is to make these billboards display more or less like they were physical objects. They should be larger if you are close to them and smaller when farther... the phone I think I screwed my approach. I made an assumption that the maximum view distanse is let 䏭 say 200 m. Then billboards being 100 m from the phone are displayed in 50 of their original size. That 䏭 it. A linear scaling based on the maximum.. size. That 䏭 it. A linear scaling based on the maximum distance. What I missed by this approach is the size of billboards understood as physical objects . The way they display on the screen depends on their size in pixels only. This means that..

OpenGL-ES 2.0 VS OpenGL-ES 1.1, which is faster?

http://stackoverflow.com/questions/5682010/opengl-es-2-0-vs-opengl-es-1-1-which-is-faster

1.1 with pure geometry would be all but impossible because the number of triangles required would be ridiculous also billboards wouldn't work well for my cylinders and the intersection of these shapes wouldn't be handled right in that case . A million..