implement that. Also make solver work only between the first and
last visible group; earlier can just work from previous solve
result, and later don't matter.
There's some issues with the csg code; it will eventually produce
an open mesh, which is very bad. Not sure whether that's a logic
bug, or a numerical issue; still generating absurd triangles pretty
routinely.
[git-p4: depot-paths = "//depot/solvespace/": change = 1741]
as a constraint on the direction cosine, rather than driving the
dot product against a rotated vector to zero. The drawing is the
ugly part; to do that for skew lines, I gave up.
Also add a function to clear non-existent items on the selection
after solving, since that could have caused an oops().
[git-p4: depot-paths = "//depot/solvespace/": change = 1727]
use the horizontal or vertical axes of the active workplane. The
equations that we write from these are very fast (of the form u + v
= 0, or u - v = 0).
[git-p4: depot-paths = "//depot/solvespace/": change = 1720]
we need something to force the points into plane, and the workplane
supplies that), but otherwise straightforward. And add diameter and
equal radius constraints for the arc.
[git-p4: depot-paths = "//depot/solvespace/": change = 1718]
list, and then adding a new entity to that list, and then looking
at that pointer again. Not okay; the add operation might have
forced a realloc. I have to watch for that.
And add a "distance ratio" constraint, plus a new kind of group
that comes with its own workplane. The workplane is not solved for;
it's generated explicitly in terms of elements that are already
solved.
[git-p4: depot-paths = "//depot/solvespace/": change = 1716]
constraints. And generate the constraint equations for entities
(e.g., that our unit quaternions have magnitude one). Numerical
troubles there, but it sort of works. Also some stuff to draw
projection lines with projected constraints, and to auto-insert
more constraints as you draw.
[git-p4: depot-paths = "//depot/solvespace/": change = 1711]
remap when I copy circle entities, in order to make the radius
numerical somehow (analogy with the POINT_ and NORMAL_XFRMD) thing.
[git-p4: depot-paths = "//depot/solvespace/": change = 1710]
segments), add the toggle construction command, and color the lines
differently depending on what group you're in.
Also change dynamic memory stuff to use a Win32 heap for everything
(no malloc), and validate that often. I think I've seen it crash,
though I can't reproduce it.
[git-p4: depot-paths = "//depot/solvespace/": change = 1708]
hadn't previously noticed, because I didn't use to have workplanes
with non-zero offsets. And clean up the interface to normals a bit.
[git-p4: depot-paths = "//depot/solvespace/": change = 1707]
vectors", represented by unit quaternions. This permits me to add
circles, where the normal defines the plane of the circle.
Still many things painful. The interface for editing normals is not
so intuitive, and it's not yet clear how I would e.g. export a
circle entity and recreate it properly, since that entity has a
param not associated with a normal or point.
And the transformed points/normals do not yet support rotations.
That will be necessary soon.
[git-p4: depot-paths = "//depot/solvespace/": change = 1705]
diagonal elements of the matrix summed to -1. Now it's ugly, but I
think that it's correct. And add a command to flip the view to the
other side, which is what started my problems. And tweak display of
H and V and M for constraints: put them in the constraint plane, so
that they're stationary as you rotate around.
[git-p4: depot-paths = "//depot/solvespace/": change = 1704]
turned out straightforward, in great part because the planes are
workplanes (6 DOF, represented by a unit quaternion and a point),
and therefore make it easy to get a vector in the plane, as well as
a normal.
And on that subject, replace the previous hack for parallel vector
constraints with a better hack: pivot on the initial numerical
guess, to choose which components of the cross product to drive to
zero. Ugly, but I think that will be as robust as I can get.
[git-p4: depot-paths = "//depot/solvespace/": change = 1699]
not have much motivation behind them, but they seem to work. And
make sure that we don't solve multiple times without repainting in
between, and tweak the text window a bit more.
[git-p4: depot-paths = "//depot/solvespace/": change = 1696]
foreground and background colours are now specified separately, and
it's possible to insert half-line spaces. So now I have a window
that lets me show/hide groups, and select the active one.
[git-p4: depot-paths = "//depot/solvespace/": change = 1695]
issues, when the points are not all in the same coordinate system.
All painful, of course. Also add continuous line drawing, and
auto-constraining of line segments as I draw.
[git-p4: depot-paths = "//depot/solvespace/": change = 1683]
determine what goes in front (e.g. put a drawn line in front of the
reference plane, even if the z order would want the opposite), and
some tweaks to the mouse behaviour, and a function to modify
constraints like dimensions so that the are initially satisfied.
[git-p4: depot-paths = "//depot/solvespace/": change = 1681]
the label associated with a constraint. And that even works,
changes the length of the line.
[git-p4: depot-paths = "//depot/solvespace/": change = 1678]
and point-in-plane. These work, but the equation is still stupid,
solving everything at once and not substituting trivial equations.
[git-p4: depot-paths = "//depot/solvespace/": change = 1677]
points are now entities like any others; so a line segment request
will generate three entities, the line segment and its endpoints. I
think that's cleaner.
When I do step and repeats (and imports, and other similar), I'll
need a consistent way to assign those entity ids. That assignment
must not change if the sketch is edited. I don't have a clean way
to do that; best thought right now is to keep a record of what maps
have been used previously, and not pick a new map as long as it's
possible to use one that was used previously.
This all means that more crap gets pushed in to the Entity
structure, so that they can keep track of what solver variables
define them. Still seems better, though. I'm closer to ready
to start solving.
[git-p4: depot-paths = "//depot/solvespace/": change = 1673]
expressions that we wish to keep around. And make the 2d coordinate
system (that causes points to generate 2 unknowns, not 3) an
attribute of the request, not the group, and add user interface to
change that.
[git-p4: depot-paths = "//depot/solvespace/": change = 1670]
on-screen, and I can drag the label. That's progress. Also
implement a bunch of untested expression stuff, since I'll need
that for the values of the dimensions, for example.
[git-p4: depot-paths = "//depot/solvespace/": change = 1668]
Jonathan Westhues