Sketchup - 21.0.0

Load in SketchUp: Extensions > Ruby Console > File > Open or paste code. This requires the SDK. A minimal main.cpp for a command that prints selection count:

std::cout << "Selected entities: " << count << std::endl; sketchup 21.0.0

size_t count = 0; SUEntitiesGetNumSelected(entities, &count); Load in SketchUp: Extensions &gt; Ruby Console &gt;

SUEntitiesRef entities = SU_INVALID; SUModelGetEntities(model, &entities); Load in SketchUp: Extensions &gt

#include <SketchUpAPI/model/defs.h> #include <SketchUpAPI/initialize.h> #include <SketchUpAPI/application/application.h> #include <SketchUpAPI/model/model.h> #include <SketchUpAPI/model/entities.h> #include <iostream> void print_selection_count() SUModelRef model = SU_INVALID; SUApplicationGetActiveModel(&model); if (!model) return;

To develop a feature for (part of the 2021 release), you’ll work with the SketchUp C++ SDK or Ruby API , depending on what you need.