Method _renderAxisCircles

Engine/source/gui/worldEditor/gizmo.cpp:1622–1827

}

void Gizmo::_renderAxisCircles()
{
   if ( mProfile->hideDisabledAxes && !( mProfile->flags & GizmoProfile::CanRotate ) )
      return;

   // Setup the WorldMatrix for rendering in camera space.
   // Honestly not sure exactly why this works but it does...
   GFX->pushWorldMatrix();
   MatrixF cameraXfm = GFX->getWorldMatrix();   
   cameraXfm.inverse();
   const Point3F cameraPos = cameraXfm.getPosition();
   cameraXfm.setPosition( mOrigin );
   GFX->multWorld(cameraXfm);

   // Render the ScreenSpace rotation circle...
   if ( !( mProfile->hideDisabledAxes && !mScreenRotateHandleEnabled ) )
   {
      F32 radius = mProjLen * 0.7f;
      U32 segments = 40;
      F32 step = mDegToRad(360.0f)/ segments;
      Point3F pnt;

      PrimBuild::color( ( mHighlightAll || mSelectionIdx == Custom1 ) ? mProfile->activeColor : mProfile->inActiveColor );
      PrimBuild::begin( GFXLineStrip, segments+1 );

      for(U32 i = 0; i <= segments; i++)
      {
         F32 angle = i * step;

         pnt.x = mCos(angle) * radius;
         pnt.y = 0.0f;
         pnt.z = mSin(angle) * radius;

         PrimBuild::vertex3fv( pnt );
      }

      PrimBuild::end();
   }

   // Render the gizmo/sphere bounding circle...
   {
      F32 radius = mProjLen * 0.5f;   
      U32 segments = 40;
      F32 step = mDegToRad(360.0f) / segments;
      Point3F pnt;
      
      // Render as solid (with transparency) when the sphere is selected
      if ( mSelectionIdx == Custom2 )
      {
         ColorI color = mProfile->inActiveColor;
         color.alpha = 100;
         PrimBuild::color( color );
         PrimBuild::begin( GFXTriangleStrip, segments+2 );
         
         PrimBuild::vertex3fv( Point3F(0,0,0) );

         for(U32 i = 0; i <= segments; i++)
         {