omni::visual::Box Class Reference

Box with subdivisions for drawing. More...

#include <Box.h>

Inheritance diagram for omni::visual::Box:

Collaboration diagram for omni::visual::Box:

Public Member Functions
	Box ()
	~Box ()
void	draw () const
	Draw box. More...
void	update ()
	Update box mesh. More...
Public Member Functions inherited from omni::visual::Interface
virtual	~Interface ()

Private Attributes
size_t	horizontal_ = 4
size_t	vertical_ = 4
VertexVBO	vbo_

Additional Inherited Members
Static Protected Member Functions inherited from omni::visual::Interface
static void	vertex3 (QVector3D const &)
	glVertex3f from QVector3D More...
static void	visualLine (QVector3D const &_from, QVector3D const &_to)
	Draws a line. More...
static void	color (QColor _color, float _alpha=1.0)
	glColor4f from QColor More...

Detailed Description

Box with subdivisions for drawing.

Constructor & Destructor Documentation

omni::visual::Box::Box

(

)

{}

omni::visual::Box::~Box

(

)

{}

Member Function Documentation

void omni::visual::Box::draw ( ) const

virtual

Draw box.

Implements omni::visual::Interface.

                         {
      vbo_.bindAndDraw(vbo_.numIndices(), GL_QUADS);
    }

void omni::visual::Box::update ( )

virtual

Update box mesh.

Reimplemented from omni::visual::Interface.

                     {
      size_t _resX        = horizontal_ + 1;
      size_t _resY        = vertical_ + 1;
      size_t _numVertices = _resX * _resY;
      VertexVBO::vertex_buffer_type _vertices(6 * _numVertices);
      VertexVBO::index_buffer_type  _indices(6 * 4 * _numVertices);

      auto _vertexIt = _vertices.begin();
      auto _indexIt  = _indices.begin();

      std::array<QVector3D, 6> _normals = {
        QVector3D(0.0,    1.0, 0.0),
        QVector3D(0.0,   -1.0, 0.0),
        QVector3D(1.0,    0.0, 0.0),
        QVector3D(-1.0,   0.0, 0.0),
        QVector3D(0.0,    0.0, 1.0),
        QVector3D(0.0,    0.0, -1.0)
      };

      for (size_t i = 0; i < 6; ++i) {
        auto& _normal = _normals[i];

        for (size_t x = 0; x < _resX; ++x) {
          for (size_t y = 0; y < _resY; ++y) {
            // index
            if (((x + 1) < _resX) && ((y + 1) < _resY)) {
              *(_indexIt++) = i * _numVertices  + (x + 0) * _resY + (y + 1);
              *(_indexIt++) = i * _numVertices +  (x + 1) * _resY + (y + 1);
              *(_indexIt++) = i * _numVertices + (x + 1) * _resY + (y + 0);
              *(_indexIt++) = i * _numVertices + (x + 0) * _resY + (y + 0);
            }

            // texCoords
            QVector2D _pos(x / float(_resX - 1), y / float(_resY - 1));
            QVector2D _texCoord((i + 1.0 - _pos.x()) / 6.0, _pos.y());
            _pos -= QVector2D(0.5, 0.5);

            switch (i)
            {
            case 0:
              _vertexIt->setPos(QVector3D(_pos.x(), _normal.y() * 0.5, _pos.y()));
              break;

            case 1:
              _vertexIt->setPos(QVector3D(-_pos.x(), _normal.y() * 0.5,
                                          _pos.y()));
              break;

            case 2:
              _vertexIt->setPos(QVector3D(_normal.x() * 0.5, -_pos.x(),
                                          _pos.y()));
              break;

            case 3:
              _vertexIt->setPos(QVector3D(_normal.x() * 0.5, _pos.x(), _pos.y()));
              break;

            case 4:
              _vertexIt->setPos(QVector3D(-_pos.x(), _pos.y(),
                                          _normal.z() * 0.5));
              break;

            case 5:
              _vertexIt->setPos(QVector3D(-_pos.x(), -_pos.y(),
                                          _normal.z() * 0.5));
              break;
            }

            _vertexIt->setTexCoord(_texCoord);

            _vertexIt->setNormal(_normals[i]);
            ++_vertexIt;
          }
        }
      }

      primaryContextSwitch([&](QOpenGLFunctions& _) {
        vbo_.buffer(_vertices, _indices);

      });
    }

Field Documentation

size_t omni::visual::Box::horizontal_ = 4

private

VertexVBO omni::visual::Box::vbo_

private

size_t omni::visual::Box::vertical_ = 4

private

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The documentation for this class was generated from the following files:

• include/omni/visual/Box.h
• src/lib/visual/Box.cpp