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Fixed selection behavior: bounding box now correctly takes into account

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transformations of the sources, and selects only those inside the
selection bounding box.
This commit is contained in:
brunoherbelin
2020-09-14 23:04:59 +02:00
parent 34659c4d8a
commit e03db22092
5 changed files with 46 additions and 20 deletions
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18
PickingVisitor.cpp
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@@ -69,14 +69,22 @@ void PickingVisitor::visit(Surface &n)
// create bounding box for those points (2 in practice)
GlmToolkit::AxisAlignedBoundingBox bb_points;
bb_points.extend(points_);
// apply inverse transform
bb_points = bb_points.transformed(glm::inverse(modelview_)) ;
// test bounding box for overlap with inverse transform bbox
if ( bb_points.intersect( n.bbox() ) ) {
// if ( n.bbox().contains( bb_points ) ) // alternative selection by total inclusion of source inside BB
// update the coordinates of the Surface bounding box to match transform
GlmToolkit::AxisAlignedBoundingBox surf;
surf = n.bbox().transformed(modelview_);
// Test inclusion of all four corners of the Surface inside the selection bounding box
if ( bb_points.contains( surf) ) {
// add this surface to the nodes picked
nodes_.push_back( std::pair(&n, glm::vec2(0.f)) );
}
// // ALTERNATIVE BEHAVIOR : test bounding box for overlap only
// // apply inverse transform
// bb_points = bb_points.transformed(glm::inverse(modelview_)) ;
// if ( bb_points.intersect( n.bbox() ) ) {
// // add this surface to the nodes picked
// nodes_.push_back( std::pair(&n, glm::vec2(0.f)) );
// }
}
// only one point
else if (points_.size() > 0) {