Method updatePathSubdivision

src/cinder/GeomIo.cpp:3290–3320

}

void Extrude::updatePathSubdivision()
{
	mPathSubdivisionPositions.clear();
	mPathSubdivisionTangents.clear();

	// necessary for texcoord calculation
	bool capBoundsEmpty = true;

	// iterate all the paths of the shape and subdivide, calculating both positions and tangents
	for( const auto &path : mPaths ) {
		if( capBoundsEmpty ) {
			mCapBounds = path.calcPreciseBoundingBox();
			capBoundsEmpty = false;
		}
		else
			mCapBounds.include( path.calcPreciseBoundingBox() );
		mPathSubdivisionPositions.emplace_back( vector<vec2>() );
		mPathSubdivisionTangents.emplace_back( vector<vec2>() );
		path.subdivide( &mPathSubdivisionPositions.back(), &mPathSubdivisionTangents.back(), mApproximationScale );
		// normalize the tangents
		for( auto &tan : mPathSubdivisionTangents.back() )
			tan = normalize( tan );
	}

	// Each of the subdivided paths' positions constitute a new contour on our triangulation
	Triangulator triangulator;
	for( const auto &subdivision : mPathSubdivisionPositions )
		triangulator.addPolyLine( subdivision );
	
	mCap = triangulator.createMesh();
}

void Extrude::calculate( vector<vec3> *positions, vector<vec3> *normals, vector<vec3> *texCoords, vector<uint32_t> *indices ) const
{