opencv/modules/viz/src/simple_widgets.cpp

#include "precomp.hpp"

///////////////////////////////////////////////////////////////////////////////////////////////
/// line widget implementation
temp_viz::LineWidget::LineWidget(const Point3f &pt1, const Point3f &pt2, const Color &color)
{
    vtkSmartPointer<vtkLineSource> line = vtkSmartPointer<vtkLineSource>::New();
    line->SetPoint1 (pt1.x, pt1.y, pt1.z);
    line->SetPoint2 (pt2.x, pt2.y, pt2.z);
    line->Update ();

    vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New ();
    mapper->SetInput(line->GetOutput ());

    vtkSmartPointer<vtkLODActor> actor = vtkLODActor::SafeDownCast(WidgetAccessor::getActor(*this));
    actor->SetMapper(mapper);

    setColor(color);
}

void temp_viz::LineWidget::setLineWidth(float line_width)
{
    vtkSmartPointer<vtkLODActor> actor = vtkLODActor::SafeDownCast(WidgetAccessor::getActor(*this));
    actor->GetProperty()->SetLineWidth(line_width);
}

float temp_viz::LineWidget::getLineWidth()
{
    vtkSmartPointer<vtkLODActor> actor = vtkLODActor::SafeDownCast(WidgetAccessor::getActor(*this));
    return actor->GetProperty()->GetLineWidth();
}

///////////////////////////////////////////////////////////////////////////////////////////////
/// plane widget implementation

temp_viz::PlaneWidget::PlaneWidget(const Vec4f& coefs, double size, const Color &color)
{
    vtkSmartPointer<vtkPlaneSource> plane = vtkSmartPointer<vtkPlaneSource>::New ();
    plane->SetNormal (coefs[0], coefs[1], coefs[2]);
    double norm = cv::norm(cv::Vec3f(coefs.val));
    plane->Push (-coefs[3] / norm);
    
    vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New ();
    mapper->SetInput(plane->GetOutput ());
    
    vtkSmartPointer<vtkLODActor> actor = vtkLODActor::SafeDownCast(WidgetAccessor::getActor(*this));
    actor->SetMapper(mapper);
    actor->SetScale(size);
    
    setColor(color);
}

temp_viz::PlaneWidget::PlaneWidget(const Vec4f& coefs, const Point3f& pt, double size, const Color &color)
{
    vtkSmartPointer<vtkPlaneSource> plane = vtkSmartPointer<vtkPlaneSource>::New ();
    cv::Point3f coefs3(coefs[0], coefs[1], coefs[2]);
    double norm_sqr = 1.0 / coefs3.dot (coefs3);
    plane->SetNormal(coefs[0], coefs[1], coefs[2]);

    double t = coefs3.dot(pt) + coefs[3];
    cv::Vec3f p_center = pt - coefs3 * t * norm_sqr;
    plane->SetCenter (p_center[0], p_center[1], p_center[2]);
    
    vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New ();
    mapper->SetInput(plane->GetOutput ());

    vtkSmartPointer<vtkLODActor> actor = vtkLODActor::SafeDownCast(WidgetAccessor::getActor(*this));
    actor->SetMapper(mapper);
    actor->SetScale(size);

    setColor(color);
}

///////////////////////////////////////////////////////////////////////////////////////////////
/// sphere widget implementation

temp_viz::SphereWidget::SphereWidget(const cv::Point3f &center, float radius, int sphere_resolution, const Color &color)
{
    vtkSmartPointer<vtkSphereSource> sphere = vtkSmartPointer<vtkSphereSource>::New ();
    sphere->SetRadius (radius);
    sphere->SetCenter (center.x, center.y, center.z);
    sphere->SetPhiResolution (sphere_resolution);
    sphere->SetThetaResolution (sphere_resolution);
    sphere->LatLongTessellationOff ();
    sphere->Update ();
    
    vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New ();
    mapper->SetInput(sphere->GetOutput ());

    vtkSmartPointer<vtkLODActor> actor = vtkLODActor::SafeDownCast(WidgetAccessor::getActor(*this));
    actor->SetMapper(mapper);

    setColor(color);
}

///////////////////////////////////////////////////////////////////////////////////////////////
/// arrow widget implementation

temp_viz::ArrowWidget::ArrowWidget(const Point3f& pt1, const Point3f& pt2, const Color &color)
{
    vtkSmartPointer<vtkArrowSource> arrowSource = vtkSmartPointer<vtkArrowSource>::New ();
    
    float startPoint[3], endPoint[3];
    startPoint[0] = pt1.x;
    startPoint[1] = pt1.y;
    startPoint[2] = pt1.z;
    endPoint[0] = pt2.x;
    endPoint[1] = pt2.y;
    endPoint[2] = pt2.z;
    float normalizedX[3], normalizedY[3], normalizedZ[3];
    
    // The X axis is a vector from start to end
    vtkMath::Subtract(endPoint, startPoint, normalizedX);
    float length = vtkMath::Norm(normalizedX);
    vtkMath::Normalize(normalizedX);

    // The Z axis is an arbitrary vecotr cross X
    float arbitrary[3];
    arbitrary[0] = vtkMath::Random(-10,10);
    arbitrary[1] = vtkMath::Random(-10,10);
    arbitrary[2] = vtkMath::Random(-10,10);
    vtkMath::Cross(normalizedX, arbitrary, normalizedZ);
    vtkMath::Normalize(normalizedZ);

    // The Y axis is Z cross X
    vtkMath::Cross(normalizedZ, normalizedX, normalizedY);
    vtkSmartPointer<vtkMatrix4x4> matrix = vtkSmartPointer<vtkMatrix4x4>::New();

    // Create the direction cosine matrix
    matrix->Identity();
    for (unsigned int i = 0; i < 3; i++)
    {
        matrix->SetElement(i, 0, normalizedX[i]);
        matrix->SetElement(i, 1, normalizedY[i]);
        matrix->SetElement(i, 2, normalizedZ[i]);
    }    

    // Apply the transforms
    vtkSmartPointer<vtkTransform> transform = vtkSmartPointer<vtkTransform>::New();
    transform->Translate(startPoint);
    transform->Concatenate(matrix);
    transform->Scale(length, length, length);

    // Transform the polydata
    vtkSmartPointer<vtkTransformPolyDataFilter> transformPD = vtkSmartPointer<vtkTransformPolyDataFilter>::New();
    transformPD->SetTransform(transform);
    transformPD->SetInputConnection(arrowSource->GetOutputPort());
    
    vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New ();
    mapper->SetInput(transformPD->GetOutput ());

    vtkSmartPointer<vtkLODActor> actor = vtkLODActor::SafeDownCast(WidgetAccessor::getActor(*this));
    actor->SetMapper(mapper);
    
    setColor(color);
}

///////////////////////////////////////////////////////////////////////////////////////////////
/// circle widget implementation

temp_viz::CircleWidget::CircleWidget(const temp_viz::Point3f& pt, double radius, double thickness, const temp_viz::Color& color)
{
    vtkSmartPointer<vtkDiskSource> disk = vtkSmartPointer<vtkDiskSource>::New ();
    // Maybe the resolution should be lower e.g. 50 or 25
    disk->SetCircumferentialResolution (50);
    disk->SetInnerRadius (radius - thickness);
    disk->SetOuterRadius (radius + thickness);

    // Set the circle origin
    vtkSmartPointer<vtkTransform> t = vtkSmartPointer<vtkTransform>::New ();
    t->Identity ();
    t->Translate (pt.x, pt.y, pt.z);

    vtkSmartPointer<vtkTransformPolyDataFilter> tf = vtkSmartPointer<vtkTransformPolyDataFilter>::New ();
    tf->SetTransform (t);
    tf->SetInputConnection (disk->GetOutputPort ());
    
    vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New ();
    mapper->SetInput(tf->GetOutput ());

    vtkSmartPointer<vtkLODActor> actor = vtkLODActor::SafeDownCast(WidgetAccessor::getActor(*this));
    actor->SetMapper(mapper);
    
    setColor(color);
}

///////////////////////////////////////////////////////////////////////////////////////////////
/// cylinder widget implementation

temp_viz::CylinderWidget::CylinderWidget(const Point3f& pt_on_axis, const Point3f& axis_direction, double radius, int numsides, const Color &color)
{
    const cv::Point3f pt2 = pt_on_axis + axis_direction;
    vtkSmartPointer<vtkLineSource> line = vtkSmartPointer<vtkLineSource>::New ();
    line->SetPoint1 (pt_on_axis.x, pt_on_axis.y, pt_on_axis.z);
    line->SetPoint2 (pt2.x, pt2.y, pt2.z);
    
    vtkSmartPointer<vtkTubeFilter> tuber = vtkSmartPointer<vtkTubeFilter>::New ();
    tuber->SetInputConnection (line->GetOutputPort ());
    tuber->SetRadius (radius);
    tuber->SetNumberOfSides (numsides);
    
    vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New ();
    mapper->SetInput(tuber->GetOutput ());

    vtkSmartPointer<vtkLODActor> actor = vtkLODActor::SafeDownCast(WidgetAccessor::getActor(*this));
    actor->SetMapper(mapper);
    
    setColor(color);
}

///////////////////////////////////////////////////////////////////////////////////////////////
/// cylinder widget implementation

temp_viz::CubeWidget::CubeWidget(const Point3f& pt_min, const Point3f& pt_max, bool wire_frame, const Color &color)
{
    vtkSmartPointer<vtkCubeSource> cube = vtkSmartPointer<vtkCubeSource>::New ();
    cube->SetBounds (pt_min.x, pt_max.x, pt_min.y, pt_max.y, pt_min.z, pt_max.z);
    
    vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New ();
    mapper->SetInput(cube->GetOutput ());

    vtkSmartPointer<vtkLODActor> actor = vtkLODActor::SafeDownCast(WidgetAccessor::getActor(*this));
    actor->SetMapper(mapper);
    
    if (wire_frame)
        actor->GetProperty ()->SetRepresentationToWireframe ();
    
    setColor(color);
}

///////////////////////////////////////////////////////////////////////////////////////////////
/// coordinate system widget implementation

temp_viz::CoordinateSystemWidget::CoordinateSystemWidget(double scale, const Affine3f& affine)
{
    vtkSmartPointer<vtkAxes> axes = vtkSmartPointer<vtkAxes>::New ();
    axes->SetOrigin (0, 0, 0);
    axes->SetScaleFactor (scale);

    vtkSmartPointer<vtkFloatArray> axes_colors = vtkSmartPointer<vtkFloatArray>::New ();
    axes_colors->Allocate (6);
    axes_colors->InsertNextValue (0.0);
    axes_colors->InsertNextValue (0.0);
    axes_colors->InsertNextValue (0.5);
    axes_colors->InsertNextValue (0.5);
    axes_colors->InsertNextValue (1.0);
    axes_colors->InsertNextValue (1.0);

    vtkSmartPointer<vtkPolyData> axes_data = axes->GetOutput ();
    axes_data->Update ();
    axes_data->GetPointData ()->SetScalars (axes_colors);

    vtkSmartPointer<vtkTubeFilter> axes_tubes = vtkSmartPointer<vtkTubeFilter>::New ();
    axes_tubes->SetInput (axes_data);
    axes_tubes->SetRadius (axes->GetScaleFactor () / 50.0);
    axes_tubes->SetNumberOfSides (6);
    
    vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New ();
    mapper->SetScalarModeToUsePointData ();
    mapper->SetInput(axes_tubes->GetOutput ());

    vtkSmartPointer<vtkLODActor> actor = vtkLODActor::SafeDownCast(WidgetAccessor::getActor(*this));
    actor->SetMapper(mapper);

    cv::Vec3d t = affine.translation();
    actor->SetPosition (t[0], t[1], t[2]);

    cv::Matx33f m = affine.rotation();

    cv::Vec3f rvec;
    cv::Rodrigues(m, rvec);

    float r_angle = cv::norm(rvec);
    rvec *= 1.f/r_angle;

    actor->SetOrientation(0,0,0);
    actor->RotateWXYZ(r_angle*180/CV_PI,rvec[0], rvec[1], rvec[2]);
}

temp_viz::TextWidget::TextWidget(const String &text, const Point2i &pos, int font_size, const Color &color) : Widget(true)
{
    vtkSmartPointer<vtkTextActor> actor = vtkTextActor::SafeDownCast(WidgetAccessor::getActor(*this));
    actor->SetPosition (pos.x, pos.y);
    actor->SetInput (text.c_str ());

    vtkSmartPointer<vtkTextProperty> tprop = actor->GetTextProperty ();
    tprop->SetFontSize (font_size);
    tprop->SetFontFamilyToArial ();
    tprop->SetJustificationToLeft ();
    tprop->BoldOn ();

    Color c = vtkcolor(color);
    tprop->SetColor (c.val);
}