On Thursday, October 18, 2012 06:43:32 Renk Thorsten wrote: > >> Speaking of which - it'd be nice to have local north as well defined > >> direction as well - that would allow for things like the snowline > >> being higher on south slopes ... > > > > In the Northern hemisphere ;-) > > Quite so - but once you have a north-pointing vector, the rest is trivial > because you can pass geographical location as uniform and use that to > compute the magnitude and sign of the bias in a one-liner... > > * Thorsten
vec3(1.0,0.0,0.0) seems to be a pretty good aproximation. In my tests dot(normal.xy, vec2(1.0,0.0)) worked good enough. (for N hemisphere) Btw, in terrasync terrain you can safely use gl_Vertex.z as altitude. There are some issues with that one, but only in custom terrain generated after 2009, which you're not interested in supporting anyway. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
