* Require that the length of the new segment is shorter than the *current*
distance to the end of the original segment, rather than the length of the
complete original segment.
* Note that this implementation simply removes vertices that are outside the range.
* It would look far better to insert vertices at the boundary when a segment is heading
out of range. This is more complicated.
* New vertices are successfully created in the intersections between the
curve and draw surface triangles
* New vertices are also inserted along the bottom edge of the filled curve.
* However, new vertices will still need to be inserted in the lines connecting the
top of the curve and the bottom where they intersect with the triangles.
* The option for filled curves remain hidden in the GUI. See #2860.
# Please enter the commit message for your changes. Lines starting
* Project existing points onto triangles first and make sure we choose the right triangle by
sorting possible projections by distance.
* Also allow some tolerance for the inside check.
* Create the new vertices by projecting the curve segment vector onto each triangle plane
before looking for intersections with the triangle edges.
* Makes more sense user wise and makes for better code.
* Helps refactor code to relate grids to curves so the curves can have access to the grid
it is being drawn on.
* This will help fix#2825 by being able to project curve points onto the exact triangle geometry.
* The previous drawable and geometry was kept if switching to a result type without
valid points.
* The drawable is then stuck in position until switching back to a result
type that has valid points.
* This commit fixes this by clearing the geometry every time you draw.
* TODO: cache values when it is possible to do so.
* Apply a factor between 0.25 and 2.5 times the characteristic cell size
* Make the offset from the pipe scale with the plane width up to a maximum offset.
* Organise the CurveCollection settings into two groups.
* Also create a closed LINES_LOOP out of the mesh border.
* This will facilitate using different effects on the different parts.
i.e. solid border and white surface background.
* Always generate in up-direction and rotate to left/right/down
* Generate a "dominant direction" by interrogating the whole curve, not
just the first and last item.
* Improve maths:
- Generate a projection plane spanned by UP and the dominant direction.
- Project the tangent onto this projection plane.
- Generate normal as the cross product between the projected tangent and
the normal to the projection plane.
- Rotate the normal into left/right/down if required.
