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Copy pathconstraint.cpp
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739 lines (691 loc) · 31 KB
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//-----------------------------------------------------------------------------
// Implementation of the Constraint menu, to create new constraints in
// the sketch.
//
// Copyright 2008-2013 Jonathan Westhues.
//-----------------------------------------------------------------------------
#include "solvespace.h"
std::string Constraint::DescriptionString() const {
const char *s;
switch(type) {
case Type::POINTS_COINCIDENT: s = "pts-coincident"; break;
case Type::PT_PT_DISTANCE: s = "pt-pt-distance"; break;
case Type::PT_LINE_DISTANCE: s = "pt-line-distance"; break;
case Type::PT_PLANE_DISTANCE: s = "pt-plane-distance"; break;
case Type::PT_FACE_DISTANCE: s = "pt-face-distance"; break;
case Type::PROJ_PT_DISTANCE: s = "proj-pt-pt-distance"; break;
case Type::PT_IN_PLANE: s = "pt-in-plane"; break;
case Type::PT_ON_LINE: s = "pt-on-line"; break;
case Type::PT_ON_FACE: s = "pt-on-face"; break;
case Type::EQUAL_LENGTH_LINES: s = "eq-length"; break;
case Type::EQ_LEN_PT_LINE_D: s = "eq-length-and-pt-ln-dist"; break;
case Type::EQ_PT_LN_DISTANCES: s = "eq-pt-line-distances"; break;
case Type::LENGTH_RATIO: s = "length-ratio"; break;
case Type::LENGTH_DIFFERENCE: s = "length-difference"; break;
case Type::SYMMETRIC: s = "symmetric"; break;
case Type::SYMMETRIC_HORIZ: s = "symmetric-h"; break;
case Type::SYMMETRIC_VERT: s = "symmetric-v"; break;
case Type::SYMMETRIC_LINE: s = "symmetric-line"; break;
case Type::AT_MIDPOINT: s = "at-midpoint"; break;
case Type::HORIZONTAL: s = "horizontal"; break;
case Type::VERTICAL: s = "vertical"; break;
case Type::DIAMETER: s = "diameter"; break;
case Type::PT_ON_CIRCLE: s = "pt-on-circle"; break;
case Type::SAME_ORIENTATION: s = "same-orientation"; break;
case Type::ANGLE: s = "angle"; break;
case Type::PARALLEL: s = "parallel"; break;
case Type::ARC_LINE_TANGENT: s = "arc-line-tangent"; break;
case Type::CUBIC_LINE_TANGENT: s = "cubic-line-tangent"; break;
case Type::CURVE_CURVE_TANGENT: s = "curve-curve-tangent"; break;
case Type::PERPENDICULAR: s = "perpendicular"; break;
case Type::EQUAL_RADIUS: s = "eq-radius"; break;
case Type::EQUAL_ANGLE: s = "eq-angle"; break;
case Type::EQUAL_LINE_ARC_LEN: s = "eq-line-len-arc-len"; break;
case Type::WHERE_DRAGGED: s = "lock-where-dragged"; break;
case Type::COMMENT: s = "comment"; break;
default: s = "???"; break;
}
return ssprintf("c%03x-%s", h.v, s);
}
#ifndef LIBRARY
//-----------------------------------------------------------------------------
// Delete all constraints with the specified type, entityA, ptA. We use this
// when auto-removing constraints that would become redundant.
//-----------------------------------------------------------------------------
void Constraint::DeleteAllConstraintsFor(Constraint::Type type, hEntity entityA, hEntity ptA)
{
SK.constraint.ClearTags();
for(int i = 0; i < SK.constraint.n; i++) {
ConstraintBase *ct = &(SK.constraint.elem[i]);
if(ct->type != type) continue;
if(ct->entityA.v != entityA.v) continue;
if(ct->ptA.v != ptA.v) continue;
ct->tag = 1;
}
SK.constraint.RemoveTagged();
// And no need to do anything special, since nothing
// ever depends on a constraint. But do clear the
// hover, in case the just-deleted constraint was
// hovered.
SS.GW.hover.Clear();
}
hConstraint Constraint::AddConstraint(Constraint *c) {
return AddConstraint(c, /*rememberForUndo=*/true);
}
hConstraint Constraint::AddConstraint(Constraint *c, bool rememberForUndo) {
if(rememberForUndo) SS.UndoRemember();
SK.constraint.AddAndAssignId(c);
SS.MarkGroupDirty(c->group);
SS.ScheduleGenerateAll();
return c->h;
}
hConstraint Constraint::Constrain(Constraint::Type type, hEntity ptA, hEntity ptB,
hEntity entityA, hEntity entityB,
bool other, bool other2)
{
Constraint c = {};
c.group = SS.GW.activeGroup;
c.workplane = SS.GW.ActiveWorkplane();
c.type = type;
c.ptA = ptA;
c.ptB = ptB;
c.entityA = entityA;
c.entityB = entityB;
c.other = other;
c.other2 = other2;
return AddConstraint(&c, /*rememberForUndo=*/false);
}
hConstraint Constraint::Constrain(Constraint::Type type, hEntity ptA, hEntity ptB, hEntity entityA){
return Constrain(type, ptA, ptB, entityA, Entity::NO_ENTITY, /*other=*/false, /*other2=*/false);
}
hConstraint Constraint::ConstrainCoincident(hEntity ptA, hEntity ptB) {
return Constrain(Type::POINTS_COINCIDENT, ptA, ptB,
Entity::NO_ENTITY, Entity::NO_ENTITY, /*other=*/false, /*other2=*/false);
}
void Constraint::MenuConstrain(Command id) {
Constraint c = {};
c.group = SS.GW.activeGroup;
c.workplane = SS.GW.ActiveWorkplane();
SS.GW.GroupSelection();
auto const &gs = SS.GW.gs;
switch(id) {
case Command::DISTANCE_DIA:
case Command::REF_DISTANCE: {
if(gs.points == 2 && gs.n == 2) {
c.type = Type::PT_PT_DISTANCE;
c.ptA = gs.point[0];
c.ptB = gs.point[1];
} else if(gs.lineSegments == 1 && gs.n == 1) {
c.type = Type::PT_PT_DISTANCE;
Entity *e = SK.GetEntity(gs.entity[0]);
c.ptA = e->point[0];
c.ptB = e->point[1];
} else if(gs.vectors == 1 && gs.points == 2 && gs.n == 3) {
c.type = Type::PROJ_PT_DISTANCE;
c.ptA = gs.point[0];
c.ptB = gs.point[1];
c.entityA = gs.vector[0];
} else if(gs.workplanes == 1 && gs.points == 1 && gs.n == 2) {
c.type = Type::PT_PLANE_DISTANCE;
c.ptA = gs.point[0];
c.entityA = gs.entity[0];
} else if(gs.lineSegments == 1 && gs.points == 1 && gs.n == 2) {
c.type = Type::PT_LINE_DISTANCE;
c.ptA = gs.point[0];
c.entityA = gs.entity[0];
} else if(gs.faces == 1 && gs.points == 1 && gs.n == 2) {
c.type = Type::PT_FACE_DISTANCE;
c.ptA = gs.point[0];
c.entityA = gs.face[0];
} else if(gs.circlesOrArcs == 1 && gs.n == 1) {
c.type = Type::DIAMETER;
c.entityA = gs.entity[0];
} else {
Error(
"Bad selection for distance / diameter constraint. This "
"constraint can apply to:\n\n"
" * two points (distance between points)\n"
" * a line segment (length)\n"
" * two points and a line segment or normal (projected distance)\n"
" * a workplane and a point (minimum distance)\n"
" * a line segment and a point (minimum distance)\n"
" * a plane face and a point (minimum distance)\n"
" * a circle or an arc (diameter)\n");
return;
}
if(c.type == Type::PT_PT_DISTANCE || c.type == Type::PROJ_PT_DISTANCE) {
Vector n = SS.GW.projRight.Cross(SS.GW.projUp);
Vector a = SK.GetEntity(c.ptA)->PointGetNum();
Vector b = SK.GetEntity(c.ptB)->PointGetNum();
c.disp.offset = n.Cross(a.Minus(b));
c.disp.offset = (c.disp.offset).WithMagnitude(50/SS.GW.scale);
} else {
c.disp.offset = Vector::From(0, 0, 0);
}
if(id == Command::REF_DISTANCE) {
c.reference = true;
}
c.valA = 0;
c.ModifyToSatisfy();
AddConstraint(&c);
break;
}
case Command::ON_ENTITY:
if(gs.points == 2 && gs.n == 2) {
c.type = Type::POINTS_COINCIDENT;
c.ptA = gs.point[0];
c.ptB = gs.point[1];
} else if(gs.points == 1 && gs.workplanes == 1 && gs.n == 2) {
c.type = Type::PT_IN_PLANE;
c.ptA = gs.point[0];
c.entityA = gs.entity[0];
} else if(gs.points == 1 && gs.lineSegments == 1 && gs.n == 2) {
c.type = Type::PT_ON_LINE;
c.ptA = gs.point[0];
c.entityA = gs.entity[0];
} else if(gs.points == 1 && gs.circlesOrArcs == 1 && gs.n == 2) {
c.type = Type::PT_ON_CIRCLE;
c.ptA = gs.point[0];
c.entityA = gs.entity[0];
} else if(gs.points == 1 && gs.faces == 1 && gs.n == 2) {
c.type = Type::PT_ON_FACE;
c.ptA = gs.point[0];
c.entityA = gs.face[0];
} else {
Error("Bad selection for on point / curve / plane constraint. "
"This constraint can apply to:\n\n"
" * two points (points coincident)\n"
" * a point and a workplane (point in plane)\n"
" * a point and a line segment (point on line)\n"
" * a point and a circle or arc (point on curve)\n"
" * a point and a plane face (point on face)\n");
return;
}
AddConstraint(&c);
break;
case Command::EQUAL:
if(gs.lineSegments == 2 && gs.n == 2) {
c.type = Type::EQUAL_LENGTH_LINES;
c.entityA = gs.entity[0];
c.entityB = gs.entity[1];
} else if(gs.lineSegments == 2 && gs.points == 2 && gs.n == 4) {
c.type = Type::EQ_PT_LN_DISTANCES;
c.entityA = gs.entity[0];
c.ptA = gs.point[0];
c.entityB = gs.entity[1];
c.ptB = gs.point[1];
} else if(gs.lineSegments == 1 && gs.points == 2 && gs.n == 3) {
// The same line segment for the distances, but different
// points.
c.type = Type::EQ_PT_LN_DISTANCES;
c.entityA = gs.entity[0];
c.ptA = gs.point[0];
c.entityB = gs.entity[0];
c.ptB = gs.point[1];
} else if(gs.lineSegments == 2 && gs.points == 1 && gs.n == 3) {
c.type = Type::EQ_LEN_PT_LINE_D;
c.entityA = gs.entity[0];
c.entityB = gs.entity[1];
c.ptA = gs.point[0];
} else if(gs.vectors == 4 && gs.n == 4) {
c.type = Type::EQUAL_ANGLE;
c.entityA = gs.vector[0];
c.entityB = gs.vector[1];
c.entityC = gs.vector[2];
c.entityD = gs.vector[3];
} else if(gs.vectors == 3 && gs.n == 3) {
c.type = Type::EQUAL_ANGLE;
c.entityA = gs.vector[0];
c.entityB = gs.vector[1];
c.entityC = gs.vector[1];
c.entityD = gs.vector[2];
} else if(gs.circlesOrArcs == 2 && gs.n == 2) {
c.type = Type::EQUAL_RADIUS;
c.entityA = gs.entity[0];
c.entityB = gs.entity[1];
} else if(gs.arcs == 1 && gs.lineSegments == 1 && gs.n == 2) {
c.type = Type::EQUAL_LINE_ARC_LEN;
if(SK.GetEntity(gs.entity[0])->type == Entity::Type::ARC_OF_CIRCLE) {
c.entityA = gs.entity[1];
c.entityB = gs.entity[0];
} else {
c.entityA = gs.entity[0];
c.entityB = gs.entity[1];
}
} else {
Error("Bad selection for equal length / radius constraint. "
"This constraint can apply to:\n\n"
" * two line segments (equal length)\n"
" * two line segments and two points "
"(equal point-line distances)\n"
" * a line segment and two points "
"(equal point-line distances)\n"
" * a line segment, and a point and line segment "
"(point-line distance equals length)\n"
" * four line segments or normals "
"(equal angle between A,B and C,D)\n"
" * three line segments or normals "
"(equal angle between A,B and B,C)\n"
" * two circles or arcs (equal radius)\n"
" * a line segment and an arc "
"(line segment length equals arc length)\n");
return;
}
if(c.type == Type::EQUAL_ANGLE) {
// Infer the nearest supplementary angle from the sketch.
Vector a1 = SK.GetEntity(c.entityA)->VectorGetNum(),
b1 = SK.GetEntity(c.entityB)->VectorGetNum(),
a2 = SK.GetEntity(c.entityC)->VectorGetNum(),
b2 = SK.GetEntity(c.entityD)->VectorGetNum();
double d1 = a1.Dot(b1), d2 = a2.Dot(b2);
if(d1*d2 < 0) {
c.other = true;
}
}
AddConstraint(&c);
break;
case Command::RATIO:
if(gs.lineSegments == 2 && gs.n == 2) {
c.type = Type::LENGTH_RATIO;
c.entityA = gs.entity[0];
c.entityB = gs.entity[1];
} else {
Error("Bad selection for length ratio constraint. This "
"constraint can apply to:\n\n"
" * two line segments\n");
return;
}
c.valA = 0;
c.ModifyToSatisfy();
AddConstraint(&c);
break;
case Command::DIFFERENCE:
if(gs.lineSegments == 2 && gs.n == 2) {
c.type = Type::LENGTH_DIFFERENCE;
c.entityA = gs.entity[0];
c.entityB = gs.entity[1];
} else {
Error("Bad selection for length difference constraint. This "
"constraint can apply to:\n\n"
" * two line segments\n");
return;
}
c.valA = 0;
c.ModifyToSatisfy();
AddConstraint(&c);
break;
case Command::AT_MIDPOINT:
if(gs.lineSegments == 1 && gs.points == 1 && gs.n == 2) {
c.type = Type::AT_MIDPOINT;
c.entityA = gs.entity[0];
c.ptA = gs.point[0];
// If a point is at-midpoint, then no reason to also constrain
// it on-line; so auto-remove that.
DeleteAllConstraintsFor(Type::PT_ON_LINE, c.entityA, c.ptA);
} else if(gs.lineSegments == 1 && gs.workplanes == 1 && gs.n == 2) {
c.type = Type::AT_MIDPOINT;
int i = SK.GetEntity(gs.entity[0])->IsWorkplane() ? 1 : 0;
c.entityA = gs.entity[i];
c.entityB = gs.entity[1-i];
} else {
Error("Bad selection for at midpoint constraint. This "
"constraint can apply to:\n\n"
" * a line segment and a point "
"(point at midpoint)\n"
" * a line segment and a workplane "
"(line's midpoint on plane)\n");
return;
}
AddConstraint(&c);
break;
case Command::SYMMETRIC:
if(gs.points == 2 &&
((gs.workplanes == 1 && gs.n == 3) ||
(gs.n == 2)))
{
if(gs.entities > 0)
c.entityA = gs.entity[0];
c.ptA = gs.point[0];
c.ptB = gs.point[1];
c.type = Type::SYMMETRIC;
} else if(gs.lineSegments == 1 &&
((gs.workplanes == 1 && gs.n == 2) ||
(gs.n == 1)))
{
int i = SK.GetEntity(gs.entity[0])->IsWorkplane() ? 1 : 0;
Entity *line = SK.GetEntity(gs.entity[i]);
c.entityA = gs.entity[1-i];
c.ptA = line->point[0];
c.ptB = line->point[1];
c.type = Type::SYMMETRIC;
} else if(SS.GW.LockedInWorkplane()
&& gs.lineSegments == 2 && gs.n == 2)
{
Entity *l0 = SK.GetEntity(gs.entity[0]),
*l1 = SK.GetEntity(gs.entity[1]);
if((l1->group.v != SS.GW.activeGroup.v) ||
(l1->construction && !(l0->construction)))
{
swap(l0, l1);
}
c.ptA = l1->point[0];
c.ptB = l1->point[1];
c.entityA = l0->h;
c.type = Type::SYMMETRIC_LINE;
} else if(SS.GW.LockedInWorkplane()
&& gs.lineSegments == 1 && gs.points == 2 && gs.n == 3)
{
c.ptA = gs.point[0];
c.ptB = gs.point[1];
c.entityA = gs.entity[0];
c.type = Type::SYMMETRIC_LINE;
} else {
Error("Bad selection for symmetric constraint. This constraint "
"can apply to:\n\n"
" * two points or a line segment "
"(symmetric about workplane's coordinate axis)\n"
" * line segment, and two points or a line segment "
"(symmetric about line segment)\n"
" * workplane, and two points or a line segment "
"(symmetric about workplane)\n");
return;
}
if(c.entityA.v == Entity::NO_ENTITY.v) {
// Horizontal / vertical symmetry, implicit symmetry plane
// normal to the workplane
if(c.workplane.v == Entity::FREE_IN_3D.v) {
Error("A workplane must be active when constraining "
"symmetric without an explicit symmetry plane.");
return;
}
Vector pa = SK.GetEntity(c.ptA)->PointGetNum();
Vector pb = SK.GetEntity(c.ptB)->PointGetNum();
Vector dp = pa.Minus(pb);
EntityBase *norm = SK.GetEntity(c.workplane)->Normal();;
Vector u = norm->NormalU(), v = norm->NormalV();
if(fabs(dp.Dot(u)) > fabs(dp.Dot(v))) {
c.type = Type::SYMMETRIC_HORIZ;
} else {
c.type = Type::SYMMETRIC_VERT;
}
if(gs.lineSegments == 1) {
// If this line segment is already constrained horiz or
// vert, then auto-remove that redundant constraint.
DeleteAllConstraintsFor(Type::HORIZONTAL, (gs.entity[0]),
Entity::NO_ENTITY);
DeleteAllConstraintsFor(Type::VERTICAL, (gs.entity[0]),
Entity::NO_ENTITY);
}
}
AddConstraint(&c);
break;
case Command::VERTICAL:
case Command::HORIZONTAL: {
hEntity ha, hb;
if(c.workplane.v == Entity::FREE_IN_3D.v) {
Error("Activate a workplane (with Sketch -> In Workplane) before "
"applying a horizontal or vertical constraint.");
return;
}
if(gs.lineSegments == 1 && gs.n == 1) {
c.entityA = gs.entity[0];
Entity *e = SK.GetEntity(c.entityA);
ha = e->point[0];
hb = e->point[1];
} else if(gs.points == 2 && gs.n == 2) {
ha = c.ptA = gs.point[0];
hb = c.ptB = gs.point[1];
} else {
Error("Bad selection for horizontal / vertical constraint. "
"This constraint can apply to:\n\n"
" * two points\n"
" * a line segment\n");
return;
}
if(id == Command::HORIZONTAL) {
c.type = Type::HORIZONTAL;
} else {
c.type = Type::VERTICAL;
}
AddConstraint(&c);
break;
}
case Command::ORIENTED_SAME: {
if(gs.anyNormals == 2 && gs.n == 2) {
c.type = Type::SAME_ORIENTATION;
c.entityA = gs.anyNormal[0];
c.entityB = gs.anyNormal[1];
} else {
Error("Bad selection for same orientation constraint. This "
"constraint can apply to:\n\n"
" * two normals\n");
return;
}
SS.UndoRemember();
Entity *nfree = SK.GetEntity(c.entityA);
Entity *nref = SK.GetEntity(c.entityB);
if(nref->group.v == SS.GW.activeGroup.v) {
swap(nref, nfree);
}
if(nfree->group.v == SS.GW.activeGroup.v &&
nref ->group.v != SS.GW.activeGroup.v)
{
// nfree is free, and nref is locked (since it came from a
// previous group); so let's force nfree aligned to nref,
// and make convergence easy
Vector ru = nref ->NormalU(), rv = nref ->NormalV();
Vector fu = nfree->NormalU(), fv = nfree->NormalV();
if(fabs(fu.Dot(ru)) < fabs(fu.Dot(rv))) {
// There might be an odd*90 degree rotation about the
// normal vector; allow that, since the numerical
// constraint does
swap(ru, rv);
}
fu = fu.Dot(ru) > 0 ? ru : ru.ScaledBy(-1);
fv = fv.Dot(rv) > 0 ? rv : rv.ScaledBy(-1);
nfree->NormalForceTo(Quaternion::From(fu, fv));
}
AddConstraint(&c, /*rememberForUndo=*/false);
break;
}
case Command::OTHER_ANGLE:
if(gs.constraints == 1 && gs.n == 0) {
Constraint *c = SK.GetConstraint(gs.constraint[0]);
if(c->type == Type::ANGLE) {
SS.UndoRemember();
c->other = !(c->other);
c->ModifyToSatisfy();
break;
}
if(c->type == Type::EQUAL_ANGLE) {
SS.UndoRemember();
c->other = !(c->other);
SS.MarkGroupDirty(c->group);
SS.ScheduleGenerateAll();
break;
}
}
Error("Must select an angle constraint.");
return;
case Command::REFERENCE:
if(gs.constraints == 1 && gs.n == 0) {
Constraint *c = SK.GetConstraint(gs.constraint[0]);
if(c->HasLabel() && c->type != Type::COMMENT) {
(c->reference) = !(c->reference);
SK.GetGroup(c->group)->clean = false;
SS.GenerateAll();
break;
}
}
Error("Must select a constraint with associated label.");
return;
case Command::ANGLE:
case Command::REF_ANGLE: {
if(gs.vectors == 2 && gs.n == 2) {
c.type = Type::ANGLE;
c.entityA = gs.vector[0];
c.entityB = gs.vector[1];
c.valA = 0;
} else {
Error("Bad selection for angle constraint. This constraint "
"can apply to:\n\n"
" * two line segments\n"
" * a line segment and a normal\n"
" * two normals\n");
return;
}
Entity *ea = SK.GetEntity(c.entityA),
*eb = SK.GetEntity(c.entityB);
if(ea->type == Entity::Type::LINE_SEGMENT &&
eb->type == Entity::Type::LINE_SEGMENT)
{
Vector a0 = SK.GetEntity(ea->point[0])->PointGetNum(),
a1 = SK.GetEntity(ea->point[1])->PointGetNum(),
b0 = SK.GetEntity(eb->point[0])->PointGetNum(),
b1 = SK.GetEntity(eb->point[1])->PointGetNum();
if(a0.Equals(b0) || a1.Equals(b1)) {
// okay, vectors should be drawn in same sense
} else if(a0.Equals(b1) || a1.Equals(b0)) {
// vectors are in opposite sense
c.other = true;
} else {
// no shared point; not clear which intersection to draw
}
}
if(id == Command::REF_ANGLE) {
c.reference = true;
}
c.ModifyToSatisfy();
AddConstraint(&c);
break;
}
case Command::PARALLEL:
if(gs.vectors == 2 && gs.n == 2) {
c.type = Type::PARALLEL;
c.entityA = gs.vector[0];
c.entityB = gs.vector[1];
} else if(gs.lineSegments == 1 && gs.arcs == 1 && gs.n == 2) {
Entity *line = SK.GetEntity(gs.entity[0]);
Entity *arc = SK.GetEntity(gs.entity[1]);
if(line->type == Entity::Type::ARC_OF_CIRCLE) {
swap(line, arc);
}
Vector l0 = SK.GetEntity(line->point[0])->PointGetNum(),
l1 = SK.GetEntity(line->point[1])->PointGetNum();
Vector a1 = SK.GetEntity(arc->point[1])->PointGetNum(),
a2 = SK.GetEntity(arc->point[2])->PointGetNum();
if(l0.Equals(a1) || l1.Equals(a1)) {
c.other = false;
} else if(l0.Equals(a2) || l1.Equals(a2)) {
c.other = true;
} else {
Error("The tangent arc and line segment must share an "
"endpoint. Constrain them with Constrain -> "
"On Point before constraining tangent.");
return;
}
c.type = Type::ARC_LINE_TANGENT;
c.entityA = arc->h;
c.entityB = line->h;
} else if(gs.lineSegments == 1 && gs.cubics == 1 && gs.n == 2) {
Entity *line = SK.GetEntity(gs.entity[0]);
Entity *cubic = SK.GetEntity(gs.entity[1]);
if(line->type == Entity::Type::CUBIC) {
swap(line, cubic);
}
Vector l0 = SK.GetEntity(line->point[0])->PointGetNum(),
l1 = SK.GetEntity(line->point[1])->PointGetNum();
Vector as = cubic->CubicGetStartNum(),
af = cubic->CubicGetFinishNum();
if(l0.Equals(as) || l1.Equals(as)) {
c.other = false;
} else if(l0.Equals(af) || l1.Equals(af)) {
c.other = true;
} else {
Error("The tangent cubic and line segment must share an "
"endpoint. Constrain them with Constrain -> "
"On Point before constraining tangent.");
return;
}
c.type = Type::CUBIC_LINE_TANGENT;
c.entityA = cubic->h;
c.entityB = line->h;
} else if(gs.cubics + gs.arcs == 2 && gs.n == 2) {
if(!SS.GW.LockedInWorkplane()) {
Error("Curve-curve tangency must apply in workplane.");
return;
}
Entity *eA = SK.GetEntity(gs.entity[0]),
*eB = SK.GetEntity(gs.entity[1]);
Vector as = eA->EndpointStart(),
af = eA->EndpointFinish(),
bs = eB->EndpointStart(),
bf = eB->EndpointFinish();
if(as.Equals(bs)) {
c.other = false; c.other2 = false;
} else if(as.Equals(bf)) {
c.other = false; c.other2 = true;
} else if(af.Equals(bs)) {
c.other = true; c.other2 = false;
} else if(af.Equals(bf)) {
c.other = true; c.other2 = true;
} else {
Error("The curves must share an endpoint. Constrain them "
"with Constrain -> On Point before constraining "
"tangent.");
return;
}
c.type = Type::CURVE_CURVE_TANGENT;
c.entityA = eA->h;
c.entityB = eB->h;
} else {
Error("Bad selection for parallel / tangent constraint. This "
"constraint can apply to:\n\n"
" * two line segments (parallel)\n"
" * a line segment and a normal (parallel)\n"
" * two normals (parallel)\n"
" * two line segments, arcs, or beziers, that share "
"an endpoint (tangent)\n");
return;
}
AddConstraint(&c);
break;
case Command::PERPENDICULAR:
if(gs.vectors == 2 && gs.n == 2) {
c.type = Type::PERPENDICULAR;
c.entityA = gs.vector[0];
c.entityB = gs.vector[1];
} else {
Error("Bad selection for perpendicular constraint. This "
"constraint can apply to:\n\n"
" * two line segments\n"
" * a line segment and a normal\n"
" * two normals\n");
return;
}
AddConstraint(&c);
break;
case Command::WHERE_DRAGGED:
if(gs.points == 1 && gs.n == 1) {
c.type = Type::WHERE_DRAGGED;
c.ptA = gs.point[0];
} else {
Error("Bad selection for lock point where dragged constraint. "
"This constraint can apply to:\n\n"
" * a point\n");
return;
}
AddConstraint(&c);
break;
case Command::COMMENT:
SS.GW.pending.operation = GraphicsWindow::Pending::COMMAND;
SS.GW.pending.command = Command::COMMENT;
SS.GW.pending.description = "click center of comment text";
SS.ScheduleShowTW();
break;
default: ssassert(false, "Unexpected menu ID");
}
SS.GW.ClearSelection();
InvalidateGraphics();
}
#endif /* ! LIBRARY */
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