C++ Point2d::DistanceTo方法代码示例

//.........这里部分代码省略.........
                // Draw the diameter symbol
                Vector dc = topLeft;
                dc = dc.Plus(gu.WithMagnitude(5/SS.GW.scale));
                dc = dc.Plus(gr.WithMagnitude(9/SS.GW.scale));
                double dr = 5/SS.GW.scale;
                double theta, dtheta = (2*PI)/12;
                for(theta = 0; theta < 2*PI-0.01; theta += dtheta) {
                    LineDrawOrGetDistance(
                        dc.Plus(gu.WithMagnitude(cos(theta)*dr)).Plus(
                                gr.WithMagnitude(sin(theta)*dr)),
                        dc.Plus(gu.WithMagnitude(cos(theta+dtheta)*dr)).Plus(
                                gr.WithMagnitude(sin(theta+dtheta)*dr)));
                }
                theta = 25*(PI/180);
                dr *= 1.7;
                dtheta = PI;
                LineDrawOrGetDistance(
                    dc.Plus(gu.WithMagnitude(cos(theta)*dr)).Plus(
                            gr.WithMagnitude(sin(theta)*dr)),
                    dc.Plus(gu.WithMagnitude(cos(theta+dtheta)*dr)).Plus(
                            gr.WithMagnitude(sin(theta+dtheta)*dr)));
            }
            break;
        }

        case POINTS_COINCIDENT: {
            if(!dogd.drawing) {
                for(int i = 0; i < 2; i++) {
                    Vector p = SK.GetEntity(i == 0 ? ptA : ptB)-> PointGetNum();
                    Point2d pp = SS.GW.ProjectPoint(p);
                    // The point is selected within a radius of 7, from the
                    // same center; so if the point is visible, then this
                    // constraint cannot be selected. But that's okay.
                    dogd.dmin = min(dogd.dmin, pp.DistanceTo(dogd.mp) - 3);
                    dogd.refp = p;
                }
                break;
            }

            if(dogd.drawing) {
                // Let's adjust the color of this constraint to have the same
                // rough luma as the point color, so that the constraint does not
                // stand out in an ugly way.
                RgbaColor cd = Style::Color(Style::DATUM),
                         cc = Style::Color(Style::CONSTRAINT);
                // convert from 8-bit color to a vector
                Vector vd = Vector::From(cd.redF(), cd.greenF(), cd.blueF()),
                       vc = Vector::From(cc.redF(), cc.greenF(), cc.blueF());
                // and scale the constraint color to have the same magnitude as
                // the datum color, maybe a bit dimmer
                vc = vc.WithMagnitude(vd.Magnitude()*0.9);
                // and set the color to that.
                ssglColorRGB(RGBf(vc.x, vc.y, vc.z));

                for(int a = 0; a < 2; a++) {
                    Vector r = SS.GW.projRight.ScaledBy((a+1)/SS.GW.scale);
                    Vector d = SS.GW.projUp.ScaledBy((2-a)/SS.GW.scale);
                    for(int i = 0; i < 2; i++) {
                        Vector p = SK.GetEntity(i == 0 ? ptA : ptB)-> PointGetNum();
                        glBegin(GL_QUADS);
                            ssglVertex3v(p.Plus (r).Plus (d));
                            ssglVertex3v(p.Plus (r).Minus(d));
                            ssglVertex3v(p.Minus(r).Minus(d));
                            ssglVertex3v(p.Minus(r).Plus (d));
                        glEnd();
                    }

void GraphicsWindow::MouseMoved(double x, double y, bool leftDown,
            bool middleDown, bool rightDown, bool shiftDown, bool ctrlDown)
{
    if(GraphicsEditControlIsVisible()) return;
    if(context.active) return;

    SS.extraLine.draw = false;

    if(!orig.mouseDown) {
        // If someone drags the mouse into our window with the left button
        // already depressed, then we don't have our starting point; so
        // don't try.
        leftDown = false;
    }

    if(rightDown) {
        middleDown = true;
        shiftDown = !shiftDown;
    }

    if(SS.showToolbar) {
        if(ToolbarMouseMoved((int)x, (int)y)) {
            hover.Clear();
            return;
        }
    }

    if(!leftDown && (pending.operation == DRAGGING_POINTS ||
                     pending.operation == DRAGGING_MARQUEE))
    {
        ClearPending();
        InvalidateGraphics();
    }

    Point2d mp = Point2d::From(x, y);
    currentMousePosition = mp;

    if(rightDown && orig.mouse.DistanceTo(mp) < 5 && !orig.startedMoving) {
        // Avoid accidentally panning (or rotating if shift is down) if the
        // user wants a context menu.
        return;
    }
    orig.startedMoving = true;

    // If the middle button is down, then mouse movement is used to pan and
    // rotate our view. This wins over everything else.
    if(middleDown) {
        hover.Clear();

        double dx = (x - orig.mouse.x) / scale;
        double dy = (y - orig.mouse.y) / scale;

        if(!(shiftDown || ctrlDown)) {
            double s = 0.3*(PI/180)*scale; // degrees per pixel
            projRight = orig.projRight.RotatedAbout(orig.projUp, -s*dx);
            projUp = orig.projUp.RotatedAbout(orig.projRight, s*dy);

            NormalizeProjectionVectors();
        } else if(ctrlDown) {
            double theta = atan2(orig.mouse.y, orig.mouse.x);
            theta -= atan2(y, x);
            SS.extraLine.draw = true;
            SS.extraLine.ptA = UnProjectPoint(Point2d::From(0, 0));
            SS.extraLine.ptB = UnProjectPoint(mp);

            Vector normal = orig.projRight.Cross(orig.projUp);
            projRight = orig.projRight.RotatedAbout(normal, theta);
            projUp = orig.projUp.RotatedAbout(normal, theta);

            NormalizeProjectionVectors();
        } else {
            offset.x = orig.offset.x + dx*projRight.x + dy*projUp.x;
            offset.y = orig.offset.y + dx*projRight.y + dy*projUp.y;
            offset.z = orig.offset.z + dx*projRight.z + dy*projUp.z;
        }

        orig.projRight = projRight;
        orig.projUp = projUp;
        orig.offset = offset;
        orig.mouse.x = x;
        orig.mouse.y = y;

        if(SS.TW.shown.screen == TextWindow::SCREEN_EDIT_VIEW) {
            if(havePainted) {
                SS.ScheduleShowTW();
            }
        }
        InvalidateGraphics();
        havePainted = false;
        return;
    }

    if(pending.operation == 0) {
        double dm = orig.mouse.DistanceTo(mp);
        // If we're currently not doing anything, then see if we should
        // start dragging something.
        if(leftDown && dm > 3) {
            Entity *e = NULL;
            if(hover.entity.v) e = SK.GetEntity(hover.entity);
            if(e && e->type != Entity::WORKPLANE) {
//.........这里部分代码省略.........

void Entity::DrawOrGetDistance(void) {
    if(!IsVisible()) return;

    Group *g = SK.GetGroup(group);

    switch(type) {
        case POINT_N_COPY:
        case POINT_N_TRANS:
        case POINT_N_ROT_TRANS:
        case POINT_N_ROT_AA:
        case POINT_IN_3D:
        case POINT_IN_2D: {
            Vector v = PointGetNum();
            dogd.refp = v;

            if(dogd.drawing) {
                double s = 3.5;
                Vector r = SS.GW.projRight.ScaledBy(s/SS.GW.scale);
                Vector d = SS.GW.projUp.ScaledBy(s/SS.GW.scale);

                ssglColorRGB(Style::Color(Style::DATUM));
                ssglDepthRangeOffset(6);
                glBegin(GL_QUADS);
                    ssglVertex3v(v.Plus (r).Plus (d));
                    ssglVertex3v(v.Plus (r).Minus(d));
                    ssglVertex3v(v.Minus(r).Minus(d));
                    ssglVertex3v(v.Minus(r).Plus (d));
                glEnd();
                ssglDepthRangeOffset(0);
            } else {
                Point2d pp = SS.GW.ProjectPoint(v);
                dogd.dmin = pp.DistanceTo(dogd.mp) - 6;
            }
            break;
        }

        case NORMAL_N_COPY:
        case NORMAL_N_ROT:
        case NORMAL_N_ROT_AA:
        case NORMAL_IN_3D:
        case NORMAL_IN_2D: {
            int i;
            for(i = 0; i < 2; i++) {
                if(i == 0 && !SS.GW.showNormals) {
                    // When the normals are hidden, we will continue to show
                    // the coordinate axes at the bottom left corner, but
                    // not at the origin.
                    continue;
                }

                hRequest hr = h.request();
                // Always draw the x, y, and z axes in red, green, and blue;
                // brighter for the ones at the bottom left of the screen,
                // dimmer for the ones at the model origin.
                int f = (i == 0 ? 100 : 255);
                if(hr.v == Request::HREQUEST_REFERENCE_XY.v) {
                    ssglColorRGB(RGBi(0, 0, f));
                } else if(hr.v == Request::HREQUEST_REFERENCE_YZ.v) {
                    ssglColorRGB(RGBi(f, 0, 0));
                } else if(hr.v == Request::HREQUEST_REFERENCE_ZX.v) {
                    ssglColorRGB(RGBi(0, f, 0));
                } else {
                    ssglColorRGB(Style::Color(Style::NORMALS));
                    if(i > 0) break;
                }

                Quaternion q = NormalGetNum();
                Vector tail;
                if(i == 0) {
                    tail = SK.GetEntity(point[0])->PointGetNum();
                    glLineWidth(1);
                } else {
                    // Draw an extra copy of the x, y, and z axes, that's
                    // always in the corner of the view and at the front.
                    // So those are always available, perhaps useful.
                    double s = SS.GW.scale;
                    double h = 60 - SS.GW.height/2;
                    double w = 60 - SS.GW.width/2;
                    tail = SS.GW.projRight.ScaledBy(w/s).Plus(
                           SS.GW.projUp.   ScaledBy(h/s)).Minus(SS.GW.offset);
                    ssglDepthRangeLockToFront(true);
                    glLineWidth(2);
                }

                Vector v = (q.RotationN()).WithMagnitude(50/SS.GW.scale);
                Vector tip = tail.Plus(v);
                LineDrawOrGetDistance(tail, tip);

                v = v.WithMagnitude(12/SS.GW.scale);
                Vector axis = q.RotationV();
                LineDrawOrGetDistance(tip,tip.Minus(v.RotatedAbout(axis, 0.6)));
                LineDrawOrGetDistance(tip,tip.Minus(v.RotatedAbout(axis,-0.6)));
            }
            ssglDepthRangeLockToFront(false);
            break;
        }

        case DISTANCE:
        case DISTANCE_N_COPY:
            // These are used only as data structures, nothing to display.
//.........这里部分代码省略.........