Record TRenderStatistics

How many shapes were rendered (send to OpenGL) versus all shapes that were potentially visible. Potentially visible shapes are the ones with TShape.Visible inside a TCastleTransform with TCastleTransform.Exists.

When ShapesRendered is much smaller than ShapesVisible, it means that various algorithm(s) designed to reject invisible scene parts do a good job. This includes per-shape frustum culling (TCastleScene.ShapeFrustumCulling), distance culling (TCastleScene.DistanceCulling), occlusion culling (see TCastleViewport.OcclusionCulling).

How many shapes were rendered (send to OpenGL) versus all shapes that were potentially visible. Potentially visible shapes are the ones with TShape.Visible inside a TCastleTransform with TCastleTransform.Exists.

When ShapesRendered is much smaller than ShapesVisible, it means that various algorithm(s) designed to reject invisible scene parts do a good job. This includes per-shape frustum culling (TCastleScene.ShapeFrustumCulling), distance culling (TCastleScene.DistanceCulling), occlusion culling (see TCastleViewport.OcclusionCulling).

Subset of shapes counted in ShapesRendered that have been rendered using blending (partial transparency).

The number of shapes that were not rendered, but their bounding box was rendered to check occlusion culling. This is always zero when not using occlusion culling (TCastleViewport.OcclusionCulling). Basically, this measures the "invisible overhead" of occlusion culling.

TCastleScene rendered vs all visible.

TCastleScene rendered vs all visible.

Draw calls done, in case of OpenGL this literally counts the number of calls to glDrawElements and glDrawArrays.

Present the statistics information as a string (without any newlines). Display it e.g. by assigning to TCastleLabel.Caption.