2cb4800fbf
more starting work on the selectable faces, and fiddling in an attempt to remove dependencies when stuff gets deleted. [git-p4: depot-paths = "//depot/solvespace/": change = 1760]
779 lines
28 KiB
C++
779 lines
28 KiB
C++
#include "solvespace.h"
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const hConstraint Constraint::NO_CONSTRAINT = { 0 };
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char *Constraint::DescriptionString(void) {
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static char ret[1024];
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char *s;
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switch(type) {
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case POINTS_COINCIDENT: s = "pts-coincident"; break;
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case PT_PT_DISTANCE: s = "pt-pt-distance"; break;
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case PT_LINE_DISTANCE: s = "pt-line-distance"; break;
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case PT_PLANE_DISTANCE: s = "pt-plane-distance"; break;
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case PT_IN_PLANE: s = "pt-in-plane"; break;
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case PT_ON_LINE: s = "pt-on-line"; break;
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case PT_ON_FACE: s = "pt-on-face"; break;
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case EQUAL_LENGTH_LINES:s = "eq-length"; break;
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case LENGTH_RATIO: s = "length-ratio"; break;
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case SYMMETRIC: s = "symmetric"; break;
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case SYMMETRIC_HORIZ: s = "symmetric-h"; break;
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case SYMMETRIC_VERT: s = "symmetric-v"; break;
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case AT_MIDPOINT: s = "at-midpoint"; break;
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case HORIZONTAL: s = "horizontal"; break;
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case VERTICAL: s = "vertical"; break;
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case DIAMETER: s = "diameter"; break;
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case PT_ON_CIRCLE: s = "pt-on-circle"; break;
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case SAME_ORIENTATION: s = "same-orientation"; break;
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case ANGLE: s = "angle"; break;
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case PARALLEL: s = "parallel"; break;
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case EQUAL_RADIUS: s = "eq-radius"; break;
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default: s = "???"; break;
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}
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sprintf(ret, "c%03x-%s", h.v, s);
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return ret;
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}
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void Constraint::AddConstraint(Constraint *c) {
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SS.constraint.AddAndAssignId(c);
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SS.GW.GeneratePerSolving();
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}
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void Constraint::Constrain(int type, hEntity ptA, hEntity ptB, hEntity entityA)
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{
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Constraint c;
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memset(&c, 0, sizeof(c));
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c.group = SS.GW.activeGroup;
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c.workplane = SS.GW.ActiveWorkplane();
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c.type = type;
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c.ptA = ptA;
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c.ptB = ptB;
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c.entityA = entityA;
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AddConstraint(&c);
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}
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void Constraint::ConstrainCoincident(hEntity ptA, hEntity ptB) {
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Constrain(POINTS_COINCIDENT, ptA, ptB, Entity::NO_ENTITY);
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}
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void Constraint::MenuConstrain(int id) {
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Constraint c;
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memset(&c, 0, sizeof(c));
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c.group = SS.GW.activeGroup;
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c.workplane = SS.GW.ActiveWorkplane();
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SS.GW.GroupSelection();
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#define gs (SS.GW.gs)
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switch(id) {
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case GraphicsWindow::MNU_DISTANCE_DIA: {
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if(gs.points == 2 && gs.n == 2) {
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c.type = PT_PT_DISTANCE;
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c.ptA = gs.point[0];
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c.ptB = gs.point[1];
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} else if(gs.lineSegments == 1 && gs.n == 1) {
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c.type = PT_PT_DISTANCE;
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Entity *e = SS.GetEntity(gs.entity[0]);
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c.ptA = e->point[0];
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c.ptB = e->point[1];
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} else if(gs.workplanes == 1 && gs.points == 1 && gs.n == 2) {
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c.type = PT_PLANE_DISTANCE;
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c.ptA = gs.point[0];
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c.entityA = gs.entity[0];
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} else if(gs.lineSegments == 1 && gs.points == 1 && gs.n == 2) {
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c.type = PT_LINE_DISTANCE;
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c.ptA = gs.point[0];
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c.entityA = gs.entity[0];
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} else if(gs.circlesOrArcs == 1 && gs.n == 1) {
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c.type = DIAMETER;
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c.entityA = gs.entity[0];
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} else {
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Error("Bad selection for distance / diameter constraint.");
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return;
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}
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if(c.type == PT_PT_DISTANCE) {
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Vector n = SS.GW.projRight.Cross(SS.GW.projUp);
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Vector a = SS.GetEntity(c.ptA)->PointGetNum();
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Vector b = SS.GetEntity(c.ptB)->PointGetNum();
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c.disp.offset = n.Cross(a.Minus(b));
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c.disp.offset = (c.disp.offset).WithMagnitude(50/SS.GW.scale);
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} else {
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c.disp.offset = Vector::MakeFrom(0, 0, 0);
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}
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c.exprA = Expr::FromString("0")->DeepCopyKeep();
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c.ModifyToSatisfy();
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AddConstraint(&c);
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break;
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}
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case GraphicsWindow::MNU_ON_ENTITY:
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if(gs.points == 2 && gs.n == 2) {
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c.type = POINTS_COINCIDENT;
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c.ptA = gs.point[0];
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c.ptB = gs.point[1];
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} else if(gs.points == 1 && gs.workplanes == 1 && gs.n == 2) {
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c.type = PT_IN_PLANE;
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c.ptA = gs.point[0];
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c.entityA = gs.entity[0];
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} else if(gs.points == 1 && gs.lineSegments == 1 && gs.n == 2) {
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c.type = PT_ON_LINE;
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c.ptA = gs.point[0];
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c.entityA = gs.entity[0];
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} else if(gs.points == 1 && gs.circlesOrArcs == 1 && gs.n == 2) {
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c.type = PT_ON_CIRCLE;
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c.ptA = gs.point[0];
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c.entityA = gs.entity[0];
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} else {
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Error("Bad selection for on point / curve / plane constraint.");
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return;
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}
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AddConstraint(&c);
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break;
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case GraphicsWindow::MNU_EQUAL:
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if(gs.lineSegments == 2 && gs.n == 2) {
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c.type = EQUAL_LENGTH_LINES;
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c.entityA = gs.entity[0];
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c.entityB = gs.entity[1];
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} else if(gs.circlesOrArcs == 2 && gs.n == 2) {
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c.type = EQUAL_RADIUS;
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c.entityA = gs.entity[0];
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c.entityB = gs.entity[1];
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} else {
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Error("Bad selection for equal length / radius constraint.");
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return;
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}
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AddConstraint(&c);
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break;
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case GraphicsWindow::MNU_RATIO:
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if(gs.lineSegments == 2 && gs.n == 2) {
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c.type = LENGTH_RATIO;
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c.entityA = gs.entity[0];
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c.entityB = gs.entity[1];
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} else {
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Error("Bad selection for length ratio constraint.");
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return;
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}
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c.exprA = Expr::FromString("0")->DeepCopyKeep();
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c.ModifyToSatisfy();
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AddConstraint(&c);
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break;
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case GraphicsWindow::MNU_AT_MIDPOINT:
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if(gs.lineSegments == 1 && gs.points == 1 && gs.n == 2) {
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c.type = AT_MIDPOINT;
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c.entityA = gs.entity[0];
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c.ptA = gs.point[0];
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} else if(gs.lineSegments == 1 && gs.workplanes == 1 && gs.n == 2) {
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c.type = AT_MIDPOINT;
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int i = SS.GetEntity(gs.entity[0])->IsWorkplane() ? 1 : 0;
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c.entityA = gs.entity[i];
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c.entityB = gs.entity[1-i];
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} else {
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Error("Bad selection for at midpoint constraint.");
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return;
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}
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AddConstraint(&c);
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break;
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case GraphicsWindow::MNU_SYMMETRIC:
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if(gs.points == 2 &&
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((gs.workplanes == 1 && gs.n == 3) ||
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(gs.n == 2)))
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{
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c.entityA = gs.entity[0];
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c.ptA = gs.point[0];
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c.ptB = gs.point[1];
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} else if(gs.lineSegments == 1 &&
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((gs.workplanes == 1 && gs.n == 2) ||
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(gs.n == 1)))
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{
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int i = SS.GetEntity(gs.entity[0])->IsWorkplane() ? 1 : 0;
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Entity *line = SS.GetEntity(gs.entity[i]);
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c.entityA = gs.entity[1-i];
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c.ptA = line->point[0];
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c.ptB = line->point[1];
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} else {
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Error("Bad selection for symmetric constraint.");
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return;
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}
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if(c.entityA.v == Entity::NO_ENTITY.v) {
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if(c.workplane.v == Entity::FREE_IN_3D.v) {
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Error("Must be locked in to workplane when constraining "
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"symmetric without an explicit symmetry plane.");
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return;
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}
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Vector pa = SS.GetEntity(c.ptA)->PointGetNum();
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Vector pb = SS.GetEntity(c.ptB)->PointGetNum();
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Vector dp = pa.Minus(pb);
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Entity *norm = SS.GetEntity(c.workplane)->Normal();;
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Vector u = norm->NormalU(), v = norm->NormalV();
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if(fabs(dp.Dot(u)) > fabs(dp.Dot(v))) {
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c.type = SYMMETRIC_HORIZ;
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} else {
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c.type = SYMMETRIC_VERT;
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}
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} else {
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// Symmetry with a symmetry plane specified explicitly.
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c.type = SYMMETRIC;
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}
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AddConstraint(&c);
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break;
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case GraphicsWindow::MNU_VERTICAL:
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case GraphicsWindow::MNU_HORIZONTAL: {
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hEntity ha, hb;
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if(c.workplane.v == Entity::FREE_IN_3D.v) {
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Error("Select workplane before constraining horiz/vert.");
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return;
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}
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if(gs.lineSegments == 1 && gs.n == 1) {
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c.entityA = gs.entity[0];
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Entity *e = SS.GetEntity(c.entityA);
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ha = e->point[0];
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hb = e->point[1];
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} else if(gs.points == 2 && gs.n == 2) {
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ha = c.ptA = gs.point[0];
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hb = c.ptB = gs.point[1];
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} else {
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Error("Bad selection for horizontal / vertical constraint.");
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return;
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}
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if(id == GraphicsWindow::MNU_HORIZONTAL) {
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c.type = HORIZONTAL;
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} else {
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c.type = VERTICAL;
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}
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AddConstraint(&c);
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break;
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}
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case GraphicsWindow::MNU_ORIENTED_SAME:
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if(gs.anyNormals == 2 && gs.n == 2) {
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c.type = SAME_ORIENTATION;
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c.entityA = gs.anyNormal[0];
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c.entityB = gs.anyNormal[1];
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} else {
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Error("Bad selection for same orientation constraint.");
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return;
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}
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AddConstraint(&c);
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break;
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case GraphicsWindow::MNU_OTHER_ANGLE:
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if(gs.constraints == 1 && gs.n == 0) {
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Constraint *c = SS.GetConstraint(gs.constraint[0]);
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if(c->type == ANGLE) {
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c->otherAngle = !(c->otherAngle);
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c->ModifyToSatisfy();
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break;
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}
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}
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Error("Must select an angle constraint.");
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break;
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case GraphicsWindow::MNU_ANGLE:
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if(gs.vectors == 2 && gs.n == 2) {
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c.type = ANGLE;
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c.entityA = gs.vector[0];
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c.entityB = gs.vector[1];
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c.exprA = Expr::FromConstant(0)->DeepCopyKeep();
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c.otherAngle = true;
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} else {
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Error("Bad selection for angle constraint.");
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return;
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}
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c.ModifyToSatisfy();
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AddConstraint(&c);
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break;
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case GraphicsWindow::MNU_PARALLEL:
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if(gs.vectors == 2 && gs.n == 2) {
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c.type = PARALLEL;
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c.entityA = gs.vector[0];
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c.entityB = gs.vector[1];
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} else {
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Error("Bad selection for parallel constraint.");
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return;
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}
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AddConstraint(&c);
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break;
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case GraphicsWindow::MNU_SOLVE_NOW:
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SS.GenerateAll(true, 0, 10000);
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return;
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case GraphicsWindow::MNU_SOLVE_AUTO:
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if(SS.GW.solving == GraphicsWindow::SOLVE_ALWAYS) {
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SS.GW.solving = GraphicsWindow::DONT_SOLVE;
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} else {
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SS.GW.solving = GraphicsWindow::SOLVE_ALWAYS;
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}
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SS.GW.EnsureValidActives();
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break;
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default: oops();
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}
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SS.GW.ClearSelection();
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InvalidateGraphics();
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}
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Expr *Constraint::VectorsParallel(int eq, ExprVector a, ExprVector b) {
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ExprVector r = a.Cross(b);
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// Hairy ball theorem screws me here. There's no clean solution that I
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// know, so let's pivot on the initial numerical guess.
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double mx = fabs((a.x)->Eval()) + fabs((b.x)->Eval());
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double my = fabs((a.y)->Eval()) + fabs((b.y)->Eval());
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double mz = fabs((a.z)->Eval()) + fabs((b.z)->Eval());
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// The basis vector in which the vectors have the LEAST energy is the
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// one that we should look at most (e.g. if both vectors lie in the xy
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// plane, then the z component of the cross product is most important).
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// So find the strongest component of a and b, and that's the component
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// of the cross product to ignore.
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double m = max(mx, max(my, mz));
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Expr *e0, *e1;
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if(m == mx) { e0 = r.y; e1 = r.z; }
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else if(m == my) { e0 = r.z; e1 = r.x; }
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else if(m == mz) { e0 = r.x; e1 = r.y; }
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else oops();
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if(eq == 0) return e0;
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if(eq == 1) return e1;
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oops();
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}
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Expr *Constraint::PointLineDistance(hEntity wrkpl, hEntity hpt, hEntity hln) {
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Entity *ln = SS.GetEntity(hln);
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Entity *a = SS.GetEntity(ln->point[0]);
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Entity *b = SS.GetEntity(ln->point[1]);
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Entity *p = SS.GetEntity(hpt);
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if(wrkpl.v == Entity::FREE_IN_3D.v) {
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ExprVector ep = p->PointGetExprs();
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ExprVector ea = a->PointGetExprs();
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ExprVector eb = b->PointGetExprs();
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ExprVector eab = ea.Minus(eb);
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Expr *m = eab.Magnitude();
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return ((eab.Cross(ea.Minus(ep))).Magnitude())->Div(m);
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} else {
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Expr *ua, *va, *ub, *vb;
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a->PointGetExprsInWorkplane(wrkpl, &ua, &va);
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b->PointGetExprsInWorkplane(wrkpl, &ub, &vb);
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Expr *du = ua->Minus(ub);
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Expr *dv = va->Minus(vb);
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Expr *u, *v;
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p->PointGetExprsInWorkplane(wrkpl, &u, &v);
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Expr *m = ((du->Square())->Plus(dv->Square()))->Sqrt();
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Expr *proj = (dv->Times(ua->Minus(u)))->Minus(
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(du->Times(va->Minus(v))));
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return proj->Div(m);
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}
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}
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Expr *Constraint::PointPlaneDistance(ExprVector p, hEntity hpl) {
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ExprVector n;
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Expr *d;
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SS.GetEntity(hpl)->WorkplaneGetPlaneExprs(&n, &d);
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return (p.Dot(n))->Minus(d);
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}
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Expr *Constraint::Distance(hEntity wrkpl, hEntity hpa, hEntity hpb) {
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Entity *pa = SS.GetEntity(hpa);
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Entity *pb = SS.GetEntity(hpb);
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if(!(pa->IsPoint() && pb->IsPoint())) oops();
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if(wrkpl.v == Entity::FREE_IN_3D.v) {
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// This is true distance
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ExprVector ea, eb, eab;
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ea = pa->PointGetExprs();
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eb = pb->PointGetExprs();
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eab = ea.Minus(eb);
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return eab.Magnitude();
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} else {
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// This is projected distance, in the given workplane.
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Expr *au, *av, *bu, *bv;
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pa->PointGetExprsInWorkplane(wrkpl, &au, &av);
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pb->PointGetExprsInWorkplane(wrkpl, &bu, &bv);
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Expr *du = au->Minus(bu);
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Expr *dv = av->Minus(bv);
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return ((du->Square())->Plus(dv->Square()))->Sqrt();
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}
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}
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ExprVector Constraint::PointInThreeSpace(hEntity workplane, Expr *u, Expr *v) {
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Entity *w = SS.GetEntity(workplane);
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ExprVector ub = w->Normal()->NormalExprsU();
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ExprVector vb = w->Normal()->NormalExprsV();
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ExprVector ob = w->WorkplaneGetOffsetExprs();
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return (ub.ScaledBy(u)).Plus(vb.ScaledBy(v)).Plus(ob);
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}
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void Constraint::ModifyToSatisfy(void) {
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if(type == ANGLE) {
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Vector a = SS.GetEntity(entityA)->VectorGetNum();
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Vector b = SS.GetEntity(entityB)->VectorGetNum();
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if(otherAngle) a = a.ScaledBy(-1);
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if(workplane.v != Entity::FREE_IN_3D.v) {
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a = a.ProjectVectorInto(workplane);
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b = b.ProjectVectorInto(workplane);
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}
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double c = (a.Dot(b))/(a.Magnitude() * b.Magnitude());
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double theta = acos(c)*180/PI;
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Expr::FreeKeep(&exprA);
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exprA = Expr::FromConstant(theta)->DeepCopyKeep();
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} else {
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// We'll fix these ones up by looking at their symbolic equation;
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// that means no extra work.
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IdList<Equation,hEquation> l;
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// An uninit IdList could lead us to free some random address, bad.
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memset(&l, 0, sizeof(l));
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Generate(&l);
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if(l.n != 1) oops();
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// These equations are written in the form f(...) - d = 0, where
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// d is the value of the exprA.
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double v = (l.elem[0].e)->Eval();
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double nd = exprA->Eval() + v;
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Expr::FreeKeep(&exprA);
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exprA = Expr::FromConstant(nd)->DeepCopyKeep();
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l.Clear();
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}
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}
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void Constraint::AddEq(IdList<Equation,hEquation> *l, Expr *expr, int index) {
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Equation eq;
|
|
eq.e = expr;
|
|
eq.h = h.equation(index);
|
|
l->Add(&eq);
|
|
}
|
|
|
|
void Constraint::Generate(IdList<Equation,hEquation> *l) {
|
|
Expr *exA = NULL;
|
|
if(exprA) exA = exprA->DeepCopy();
|
|
|
|
switch(type) {
|
|
case PT_PT_DISTANCE:
|
|
AddEq(l, Distance(workplane, ptA, ptB)->Minus(exA), 0);
|
|
break;
|
|
|
|
case PT_LINE_DISTANCE:
|
|
AddEq(l,
|
|
PointLineDistance(workplane, ptA, entityA)->Minus(exA), 0);
|
|
break;
|
|
|
|
case PT_PLANE_DISTANCE: {
|
|
ExprVector pt = SS.GetEntity(ptA)->PointGetExprs();
|
|
AddEq(l, (PointPlaneDistance(pt, entityA))->Minus(exA), 0);
|
|
break;
|
|
}
|
|
|
|
case EQUAL_LENGTH_LINES: {
|
|
Entity *a = SS.GetEntity(entityA);
|
|
Entity *b = SS.GetEntity(entityB);
|
|
AddEq(l, Distance(workplane, a->point[0], a->point[1])->Minus(
|
|
Distance(workplane, b->point[0], b->point[1])), 0);
|
|
break;
|
|
}
|
|
|
|
case LENGTH_RATIO: {
|
|
Entity *a = SS.GetEntity(entityA);
|
|
Entity *b = SS.GetEntity(entityB);
|
|
Expr *la = Distance(workplane, a->point[0], a->point[1]);
|
|
Expr *lb = Distance(workplane, b->point[0], b->point[1]);
|
|
AddEq(l, (la->Div(lb))->Minus(exA), 0);
|
|
break;
|
|
}
|
|
|
|
case DIAMETER: {
|
|
Entity *circle = SS.GetEntity(entityA);
|
|
Expr *r = circle->CircleGetRadiusExpr();
|
|
AddEq(l, (r->Times(Expr::FromConstant(2)))->Minus(exA), 0);
|
|
break;
|
|
}
|
|
|
|
case EQUAL_RADIUS: {
|
|
Entity *c1 = SS.GetEntity(entityA);
|
|
Entity *c2 = SS.GetEntity(entityB);
|
|
AddEq(l, (c1->CircleGetRadiusExpr())->Minus(
|
|
c2->CircleGetRadiusExpr()), 0);
|
|
break;
|
|
}
|
|
|
|
case POINTS_COINCIDENT: {
|
|
Entity *a = SS.GetEntity(ptA);
|
|
Entity *b = SS.GetEntity(ptB);
|
|
if(workplane.v == Entity::FREE_IN_3D.v) {
|
|
ExprVector pa = a->PointGetExprs();
|
|
ExprVector pb = b->PointGetExprs();
|
|
AddEq(l, pa.x->Minus(pb.x), 0);
|
|
AddEq(l, pa.y->Minus(pb.y), 1);
|
|
AddEq(l, pa.z->Minus(pb.z), 2);
|
|
} else {
|
|
Expr *au, *av;
|
|
Expr *bu, *bv;
|
|
a->PointGetExprsInWorkplane(workplane, &au, &av);
|
|
b->PointGetExprsInWorkplane(workplane, &bu, &bv);
|
|
AddEq(l, au->Minus(bu), 0);
|
|
AddEq(l, av->Minus(bv), 1);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PT_IN_PLANE:
|
|
// This one works the same, whether projected or not.
|
|
AddEq(l, PointPlaneDistance(
|
|
SS.GetEntity(ptA)->PointGetExprs(), entityA), 0);
|
|
break;
|
|
|
|
case PT_ON_LINE:
|
|
if(workplane.v == Entity::FREE_IN_3D.v) {
|
|
Entity *ln = SS.GetEntity(entityA);
|
|
Entity *a = SS.GetEntity(ln->point[0]);
|
|
Entity *b = SS.GetEntity(ln->point[1]);
|
|
Entity *p = SS.GetEntity(ptA);
|
|
|
|
ExprVector ep = p->PointGetExprs();
|
|
ExprVector ea = a->PointGetExprs();
|
|
ExprVector eb = b->PointGetExprs();
|
|
ExprVector eab = ea.Minus(eb);
|
|
ExprVector eap = ea.Minus(ep);
|
|
|
|
AddEq(l, VectorsParallel(0, eab, eap), 0);
|
|
AddEq(l, VectorsParallel(1, eab, eap), 1);
|
|
} else {
|
|
AddEq(l, PointLineDistance(workplane, ptA, entityA), 0);
|
|
}
|
|
break;
|
|
|
|
case PT_ON_CIRCLE: {
|
|
Entity *circle = SS.GetEntity(entityA);
|
|
hEntity center = circle->point[0];
|
|
Expr *radius = circle->CircleGetRadiusExpr();
|
|
AddEq(l, Distance(workplane, ptA, center)->Minus(radius), 0);
|
|
break;
|
|
}
|
|
|
|
case AT_MIDPOINT:
|
|
if(workplane.v == Entity::FREE_IN_3D.v) {
|
|
Entity *ln = SS.GetEntity(entityA);
|
|
ExprVector a = SS.GetEntity(ln->point[0])->PointGetExprs();
|
|
ExprVector b = SS.GetEntity(ln->point[1])->PointGetExprs();
|
|
ExprVector m = (a.Plus(b)).ScaledBy(Expr::FromConstant(0.5));
|
|
|
|
if(ptA.v) {
|
|
ExprVector p = SS.GetEntity(ptA)->PointGetExprs();
|
|
AddEq(l, (m.x)->Minus(p.x), 0);
|
|
AddEq(l, (m.y)->Minus(p.y), 1);
|
|
AddEq(l, (m.z)->Minus(p.z), 2);
|
|
} else {
|
|
AddEq(l, PointPlaneDistance(m, entityB), 0);
|
|
}
|
|
} else {
|
|
Entity *ln = SS.GetEntity(entityA);
|
|
Entity *a = SS.GetEntity(ln->point[0]);
|
|
Entity *b = SS.GetEntity(ln->point[1]);
|
|
|
|
Expr *au, *av, *bu, *bv;
|
|
a->PointGetExprsInWorkplane(workplane, &au, &av);
|
|
b->PointGetExprsInWorkplane(workplane, &bu, &bv);
|
|
Expr *mu = Expr::FromConstant(0.5)->Times(au->Plus(bu));
|
|
Expr *mv = Expr::FromConstant(0.5)->Times(av->Plus(bv));
|
|
|
|
if(ptA.v) {
|
|
Entity *p = SS.GetEntity(ptA);
|
|
Expr *pu, *pv;
|
|
p->PointGetExprsInWorkplane(workplane, &pu, &pv);
|
|
AddEq(l, pu->Minus(mu), 0);
|
|
AddEq(l, pv->Minus(mv), 1);
|
|
} else {
|
|
ExprVector m = PointInThreeSpace(workplane, mu, mv);
|
|
AddEq(l, PointPlaneDistance(m, entityB), 0);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SYMMETRIC:
|
|
if(workplane.v == Entity::FREE_IN_3D.v) {
|
|
Entity *plane = SS.GetEntity(entityA);
|
|
Entity *ea = SS.GetEntity(ptA);
|
|
Entity *eb = SS.GetEntity(ptB);
|
|
ExprVector a = ea->PointGetExprs();
|
|
ExprVector b = eb->PointGetExprs();
|
|
|
|
// The midpoint of the line connecting the symmetric points
|
|
// lies on the plane of the symmetry.
|
|
ExprVector m = (a.Plus(b)).ScaledBy(Expr::FromConstant(0.5));
|
|
AddEq(l, PointPlaneDistance(m, plane->h), 0);
|
|
|
|
// And projected into the plane of symmetry, the points are
|
|
// coincident.
|
|
Expr *au, *av, *bu, *bv;
|
|
ea->PointGetExprsInWorkplane(plane->h, &au, &av);
|
|
eb->PointGetExprsInWorkplane(plane->h, &bu, &bv);
|
|
AddEq(l, au->Minus(bu), 0);
|
|
AddEq(l, av->Minus(bv), 1);
|
|
} else {
|
|
Entity *plane = SS.GetEntity(entityA);
|
|
Entity *a = SS.GetEntity(ptA);
|
|
Entity *b = SS.GetEntity(ptB);
|
|
|
|
Expr *au, *av, *bu, *bv;
|
|
a->PointGetExprsInWorkplane(workplane, &au, &av);
|
|
b->PointGetExprsInWorkplane(workplane, &bu, &bv);
|
|
Expr *mu = Expr::FromConstant(0.5)->Times(au->Plus(bu));
|
|
Expr *mv = Expr::FromConstant(0.5)->Times(av->Plus(bv));
|
|
|
|
ExprVector m = PointInThreeSpace(workplane, mu, mv);
|
|
AddEq(l, PointPlaneDistance(m, plane->h), 0);
|
|
|
|
// Construct a vector within the workplane that is normal
|
|
// to the symmetry pane's normal (i.e., that lies in the
|
|
// plane of symmetry). The line connecting the points is
|
|
// perpendicular to that constructed vector.
|
|
Entity *w = SS.GetEntity(workplane);
|
|
ExprVector u = w->Normal()->NormalExprsU();
|
|
ExprVector v = w->Normal()->NormalExprsV();
|
|
|
|
ExprVector pa = a->PointGetExprs();
|
|
ExprVector pb = b->PointGetExprs();
|
|
ExprVector n;
|
|
Expr *d;
|
|
plane->WorkplaneGetPlaneExprs(&n, &d);
|
|
AddEq(l, (n.Cross(u.Cross(v))).Dot(pa.Minus(pb)), 1);
|
|
}
|
|
break;
|
|
|
|
case SYMMETRIC_HORIZ:
|
|
case SYMMETRIC_VERT: {
|
|
Entity *a = SS.GetEntity(ptA);
|
|
Entity *b = SS.GetEntity(ptB);
|
|
|
|
Expr *au, *av, *bu, *bv;
|
|
a->PointGetExprsInWorkplane(workplane, &au, &av);
|
|
b->PointGetExprsInWorkplane(workplane, &bu, &bv);
|
|
|
|
if(type == SYMMETRIC_HORIZ) {
|
|
AddEq(l, av->Minus(bv), 0);
|
|
AddEq(l, au->Plus(bu), 0);
|
|
} else {
|
|
AddEq(l, au->Minus(bu), 0);
|
|
AddEq(l, av->Plus(bv), 0);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case HORIZONTAL:
|
|
case VERTICAL: {
|
|
hEntity ha, hb;
|
|
if(entityA.v) {
|
|
Entity *e = SS.GetEntity(entityA);
|
|
ha = e->point[0];
|
|
hb = e->point[1];
|
|
} else {
|
|
ha = ptA;
|
|
hb = ptB;
|
|
}
|
|
Entity *a = SS.GetEntity(ha);
|
|
Entity *b = SS.GetEntity(hb);
|
|
|
|
Expr *au, *av, *bu, *bv;
|
|
a->PointGetExprsInWorkplane(workplane, &au, &av);
|
|
b->PointGetExprsInWorkplane(workplane, &bu, &bv);
|
|
|
|
AddEq(l, (type == HORIZONTAL) ? av->Minus(bv) : au->Minus(bu), 0);
|
|
break;
|
|
}
|
|
|
|
case SAME_ORIENTATION: {
|
|
Entity *a = SS.GetEntity(entityA);
|
|
Entity *b = SS.GetEntity(entityB);
|
|
ExprVector au = a->NormalExprsU(),
|
|
av = a->NormalExprsV(),
|
|
an = a->NormalExprsN();
|
|
ExprVector bu = b->NormalExprsU(),
|
|
bv = b->NormalExprsV(),
|
|
bn = b->NormalExprsN();
|
|
|
|
AddEq(l, VectorsParallel(0, an, bn), 0);
|
|
AddEq(l, VectorsParallel(1, an, bn), 1);
|
|
Expr *d1 = au.Dot(bv);
|
|
Expr *d2 = au.Dot(bu);
|
|
// Allow either orientation for the coordinate system, depending
|
|
// on how it was drawn.
|
|
if(fabs(d1->Eval()) < fabs(d2->Eval())) {
|
|
AddEq(l, d1, 2);
|
|
} else {
|
|
AddEq(l, d2, 2);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case ANGLE: {
|
|
Entity *a = SS.GetEntity(entityA);
|
|
Entity *b = SS.GetEntity(entityB);
|
|
ExprVector ae = a->VectorGetExprs();
|
|
ExprVector be = b->VectorGetExprs();
|
|
if(otherAngle) ae = ae.ScaledBy(Expr::FromConstant(-1));
|
|
Expr *c;
|
|
if(workplane.v == Entity::FREE_IN_3D.v) {
|
|
Expr *mags = (ae.Magnitude())->Times(be.Magnitude());
|
|
c = (ae.Dot(be))->Div(mags);
|
|
} else {
|
|
Entity *w = SS.GetEntity(workplane);
|
|
ExprVector u = w->Normal()->NormalExprsU();
|
|
ExprVector v = w->Normal()->NormalExprsV();
|
|
Expr *ua = u.Dot(ae);
|
|
Expr *va = v.Dot(ae);
|
|
Expr *ub = u.Dot(be);
|
|
Expr *vb = v.Dot(be);
|
|
Expr *maga = (ua->Square()->Plus(va->Square()))->Sqrt();
|
|
Expr *magb = (ub->Square()->Plus(vb->Square()))->Sqrt();
|
|
Expr *dot = (ua->Times(ub))->Plus(va->Times(vb));
|
|
c = dot->Div(maga->Times(magb));
|
|
}
|
|
Expr *rads = exA->Times(Expr::FromConstant(PI/180));
|
|
AddEq(l, c->Minus(rads->Cos()), 0);
|
|
break;
|
|
}
|
|
|
|
case PARALLEL: {
|
|
ExprVector a = SS.GetEntity(entityA)->VectorGetExprs();
|
|
ExprVector b = SS.GetEntity(entityB)->VectorGetExprs();
|
|
|
|
if(workplane.v == Entity::FREE_IN_3D.v) {
|
|
AddEq(l, VectorsParallel(0, a, b), 0);
|
|
AddEq(l, VectorsParallel(1, a, b), 1);
|
|
} else {
|
|
Entity *w = SS.GetEntity(workplane);
|
|
ExprVector wn = w->Normal()->NormalExprsN();
|
|
AddEq(l, (a.Cross(b)).Dot(wn), 0);
|
|
}
|
|
break;
|
|
}
|
|
|
|
default: oops();
|
|
}
|
|
}
|