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Fix null ref during load.

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This happened a few times
This commit is contained in:
Richard Harrison
2019-01-20 18:08:34 +01:00
parent 8707005a97
commit 8e57a61aed
1 changed files with 5 additions and 3 deletions
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8
simgear/scene/sky/cloud.cxx
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@@ -485,9 +485,11 @@ SGCloudLayer::rebuild()
// repaint the cloud layer colors
bool SGCloudLayer::repaint( const SGVec3f& fog_color ) {
osg::Vec4f combineColor(toOsg(fog_color), cloud_alpha);
osg::TexEnvCombine* combiner
= dynamic_cast<osg::TexEnvCombine*>(layer_root->getStateSet()
->getTextureAttribute(1, osg::StateAttribute::TEXENV));
osg::StateAttribute* textureAtt = layer_root->getStateSet()->getTextureAttribute(1, osg::StateAttribute::TEXENV);
osg::TexEnvCombine* combiner = dynamic_cast<osg::TexEnvCombine*>(textureAtt);
if (combiner == nullptr)
return false;
combiner->setConstantColor(combineColor);
// Set the fog color for the 3D clouds too.