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lazy bounding radius computing for shape_node (avoids O(n^2) deserialization)

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milek7
2019-01-12 01:40:22 +01:00
committed by tmj-fstate
parent 84830882c5
commit 6f48a6e55d
3 changed files with 18 additions and 5 deletions
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12
scenenode.cpp
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@@ -410,8 +410,7 @@ shape_node::merge( shape_node &Shape ) {
m_data.vertices.insert(
std::end( m_data.vertices ),
std::begin( Shape.m_data.vertices ), std::end( Shape.m_data.vertices ) );
// NOTE: we could recalculate radius with something other than brute force, but it'll do
compute_radius();
invalidate_radius();
return true;
}
@@ -445,7 +444,16 @@ shape_node::compute_radius() {
m_data.area.radius = static_cast<float>( std::sqrt( squaredradius ) );
}
void shape_node::invalidate_radius() {
m_data.area.radius = -1.0f;
}
float shape_node::radius() {
if (m_data.area.radius == -1.0f)
compute_radius();
return m_data.area.radius;
}
// sends content of the struct to provided stream
void