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Make sure sort is deterministic. 

Fixes https://gitlab.com/kicad/code/kicad/-/issues/15336
This commit is contained in:
Jeff Young 2023-10-04 18:05:12 +01:00
parent c2d7b26ebd
commit 0d51729537
1 changed files with 14 additions and 16 deletions
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22
3d-viewer/3d_rendering/opengl/3d_model.cpp
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@ -483,21 +483,19 @@ void MODEL_3D::Draw( bool aTransparent, float aOpacity, bool aUseSelectedMateria
// Sort from back to front
std::sort( materialsSorted.begin(), materialsSorted.end(),
[&]( std::pair<const MODEL_3D::MATERIAL*, float>& a,
std::pair<const MODEL_3D::MATERIAL*, float>& b ) {
// If A is inside B, then A is rendered first
if( b.first->m_bbox.Inside( a.first->m_bbox ) )
std::pair<const MODEL_3D::MATERIAL*, float>& b )
{
return true;
}
else
{
if( a.first->m_bbox.Inside( b.first->m_bbox ) )
{
return false;
}
}
bool aInsideB = a.first->m_bbox.Inside( b.first->m_bbox );
bool bInsideA = b.first->m_bbox.Inside( a.first->m_bbox );
// If A is inside B, then A is rendered first
if( aInsideB != bInsideA )
return bInsideA;
if( a.second != b.second )
return a.second > b.second;
return a.first > b.first; // compare pointers as a last resort
} );
for( const std::pair<const MODEL_3D::MATERIAL*, float>& mat : materialsSorted )