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BuildingSymbolizer: render only roof if height <= 0

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This commit is contained in:
Mickey Rose 2018-08-10 10:53:36 +02:00
parent 874b8f531a
commit 2b9849a25b
1 changed files with 24 additions and 2 deletions
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26
include/mapnik/renderer_common/process_building_symbolizer.hpp
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@ -171,6 +171,17 @@ private:
return orientation > 0 || (orientation < 0 && render_back_side_);
}
template <typename VertexSource>
void cache_outline(VertexSource & vs)
{
double x, y;
vs.rewind(0);
while (unsigned cmd = vs.vertex(&x, &y))
{
roof_vertices_.push_vertex(x, y, static_cast<CommandType>(cmd));
}
}
template <typename T, typename Context>
void render_ground(geometry::polygon<T> const& poly,
proj_transform const& prj_trans,
@ -181,8 +192,16 @@ private:
vertex_adapter_type va(poly);
transform_path_type transformed(rencom_.t_, va, prj_trans);
painter.set_color(base_stroke_color);
paint_outline(transformed, painter);
if (height_ <= 0)
{
cache_outline(transformed);
}
else
{
painter.set_color(base_stroke_color);
paint_outline(transformed, painter);
}
}
template <typename Context>
@ -198,6 +217,9 @@ private:
template <typename Context>
void render_walls(Context & painter)
{
if (height_ <= 0)
return;
size_t const size = roof_vertices_.size();
size_t strip_begin = size;
size_t wrap_begin = size;