Method _renderCorona

Engine/source/environment/sun.cpp:461–538

}

void Sun::_renderCorona( ObjectRenderInst *ri, SceneRenderState *state, BaseMatInstance *overrideMat )
{   
   // Calculate Billboard Radius (in world units) to be constant, independent of distance.
   // Takes into account distance, viewport size, and specified size in editor
   F32 BBRadius = mCoronaWorldRadius;

   mMatrixSet->restoreSceneViewProjection();   
   
   if ( state->isReflectPass() )
      mMatrixSet->setProjection( state->getSceneManager()->getNonClipProjection() );

   //mMatrixSet->setWorld( MatrixF::Identity );

   // Initialize points with basic info
   Point3F points[4];
   points[0] = Point3F(-BBRadius, 0.0, -BBRadius);
   points[1] = Point3F( -BBRadius, 0.0, BBRadius);
   points[2] = Point3F( BBRadius, 0.0,  -BBRadius);
   points[3] = Point3F(BBRadius, 0.0, BBRadius);

   static const Point2F sCoords[4] = 
   {
      Point2F( 0.0f, 0.0f ),
      Point2F( 0.0f, 1.0f ),      
      Point2F( 1.0f, 0.0f ),
      Point2F(1.0f, 1.0f)
   };

   // Get info we need to adjust points
   const MatrixF &camView = state->getCameraTransform();

   // Finalize points
   for(S32 i = 0; i < 4; i++)
   {
      // align with camera
      camView.mulV(points[i]);
      // offset
      points[i] += mLightWorldPos;
   }

   LinearColorF vertColor;
   if ( mCoronaUseLightColor )
      vertColor = mLightColor;
   else
      vertColor = mCoronaTint;

   GFXVertexBufferHandle< GFXVertexPCT > vb;
   vb.set( GFX, 4, GFXBufferTypeVolatile );
   GFXVertexPCT *pVert = vb.lock();
   if(!pVert) return;

   for ( S32 i = 0; i < 4; i++ )
   {
      pVert->color.set( vertColor.toColorI());
      pVert->point.set( points[i] );
      pVert->texCoord.set( sCoords[i].x, sCoords[i].y );
      pVert++;
   }