Use case A: Begin() called from constructor with items_height<0, then called again from Sync() in StepNo 1 Use case B: Begin() called from constructor

Save and compare stack sizes on Begin()/End() to detect usage errors

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Frustum culls meshes, and produces a buffer of visible mesh indices

FIXME: Adding support for clamping on boundaries of the data type would be nice.

Retursn true if a directory exists

This is normally called by Render(). You may want to call it directly if you want to avoid calling Render() but the gain will be very minimal.

Helper for computing the GGX visibility term

This is only used in rare/specific situations to manufacture an ID out of nowhere.

Load file content into memory Memory allocated with ImGui::MemAlloc(), must be freed by user using ImGui::MemFree()

Parse display precision back from the display format string FIXME: This is still used by some navigation code path to infer a minimum tweak step, but

IsPipeEmpty() is a utility function, not intended for general use Should only be used very prudently.

Scroll to keep newly navigated item fully into view NB: We modify rect_rel by the amount we scrolled for, so it is immediately updated.

Returns the number of mip levels given a texture size

Note: Anti-aliased filling requires points to be in clockwise order.

Helper for ColorPicker4()