Method _renderMoon

Engine/source/environment/scatterSky.cpp:1124–1215

}

void ScatterSky::_renderMoon( ObjectRenderInst *ri, SceneRenderState *state, BaseMatInstance *overrideMat )
{
   if ( !mMoonMatInst )
      return;

   Point3F moonlightPosition = state->getCameraPosition() - /*mLight->getDirection()*/ mMoonLightDir * state->getFarPlane() * 0.9f;
   F32 dist = (moonlightPosition - state->getCameraPosition()).len();

   // worldRadius = screenRadius * dist / worldToScreen
   // screenRadius = worldRadius / dist * worldToScreen

   //
   F32 screenRadius = GFX->getViewport().extent.y * mMoonScale * 0.5f;
   F32 worldRadius = screenRadius * dist / state->getWorldToScreenScale().y;

   // 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 = worldRadius;


   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] += moonlightPosition;
   }

   // Vertex color.
   LinearColorF moonVertColor( 1.0f, 1.0f, 1.0f, mNightInterpolant );