fly/flightgear
1
0
Fork 0
Code Activity

Don't allow negative values as argument to pow().

Browse source 
This was a source of a spew of "NaN" error messages at night when the
sun is at a large angle to the zenith. I don't know why this wasn't a
problem before now.
This commit is contained in:
timoore 2008-10-28 12:10:27 +00:00
parent fe83ba7110
commit 5592bb326f
1 changed files with 9 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
src/Main/renderer.cxx
View file

@ -42,6 +42,7 @@
#include <osg/LightModel>
#include <osg/LightSource>
#include <osg/Material>
#include <osg/Math>
#include <osg/NodeCallback>
#include <osg/Notify>
#include <osg/PolygonMode>
@ -612,8 +613,14 @@ FGRenderer::update( bool refresh_camera_settings ) {
double sun_horiz_eff, moon_horiz_eff;
if (fgGetBool("/sim/rendering/horizon-effect")) {
sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
sun_horiz_eff
= 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
0.0),
0.33) / 3.0;
moon_horiz_eff
= 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
0.0),
0.33)/3.0;
} else {
sun_horiz_eff = moon_horiz_eff = 1.0;
}