ui_SceneViewPerspective.cpp

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#include "ui_SceneViewPerspective.hpp"

// --- Perspective Scene View ------------------------------------------------

SceneViewPerspective::SceneViewPerspective()
  : SceneView(ProjectionType_PERSPECTIVE)
  , mSphereCoords(90,90)
  , mFOVY(45.0)
{
}

void SceneViewPerspective::setAspect(double aspect)
{
  mProjection.setAspect(aspect);
}

void SceneViewPerspective::dragBegin()
{
  if (mDragButton == GLUT_RIGHT_BUTTON)
  {
    mBaseSphereCoords = mSphereCoords;
  }
  else if (mDragButton == GLUT_MIDDLE_BUTTON)
  {
    mBaseFOVY = mProjection.getFOVY();
  }
}
void SceneViewPerspective::dragUpdate(const Vec2i& d)
{
  if (mDragButton == GLUT_RIGHT_BUTTON)
  {
    mSphereCoords = mBaseSphereCoords - Vec2d(d[0],d[1]);
    mSphereCoords[1] = clamp(mSphereCoords[1], 0.1, 179.9 );

    // update direction

    setDirection( spherical_coordinate_to_Vec3d( mSphereCoords[0], mSphereCoords[1] ) );
  
    // update up

    double a = Math::deg2Rad(mSphereCoords[0]);
    double b = Math::deg2Rad(mSphereCoords[1]);
    AxisAngled zrot(a,0,0,1);
    AxisAngled yrot(b,0,1,0);
  
    Matrix44d tm1 = make<Matrix44d>( zrot );
    Matrix44d tm2 = make<Matrix44d>( yrot );
    Vec3d up(-1,0,0);

    Matrix44d tm3 = tm1 * tm2;

    Vec3d upt = tm3 * up;
    setUp( upt );
  }
  else if (mDragButton == GLUT_MIDDLE_BUTTON)
  {      
    mFOVY = clamp( mBaseFOVY + d[1]*0.1, 0.01, 179.99 );
  }
}
void SceneViewPerspective::display()
{
  mProjection.setFOVY( clamp( mFOVY, 0.01, 179.99 ) );
  
  setDirection( spherical_coordinate_to_Vec3d( mSphereCoords[0], mSphereCoords[1] ) );     
  SceneView::display();
}

void SceneViewPerspective::setProjectionViewSize(const Vec2d& size)
{
  SceneView::setProjectionViewSize(size);
}