avoid unneccesary projection copy
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1 changed files with 2 additions and 2 deletions
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@ -130,7 +130,7 @@ struct has_process
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// Store material for layer rendering in a two step process
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struct layer_rendering_material {
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layer const& lay_;
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projection proj0_;
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projection const& proj0_;
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projection proj1_;
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box2d<double> layer_ext2_;
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std::vector<feature_type_style const*> active_styles_;
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