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improve code comments around transforms and intersection checks

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This commit is contained in:
Dane Springmeyer 2011-07-21 21:53:39 +00:00
parent c5c729b17c
commit f14fc9dcf7
1 changed files with 2 additions and 2 deletions
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4
include/mapnik/feature_style_processor.hpp
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@ -229,7 +229,7 @@ private:
box2d<double> layer_ext = lay.envelope();
// first, try to forward project map ext into layer srs
// first, try intersection of map extent forward projected into layer srs
if (prj_trans.forward(map_ext) && map_ext.intersects(layer_ext))
{
layer_ext.clip(map_ext);
@ -239,7 +239,7 @@ private:
{
return;
}
// fallback to back projecting layer into map srs
// next try intersection of layer extent back projected into map srs
else if (prj_trans.backward(layer_ext) && map_ext.intersects(layer_ext))
{
layer_ext.clip(map_ext);