Method Chain

s2/shape.go:217–217 · view source on GitHub ↗

Chain returns the range of edge IDs corresponding to the given edge chain. Edge chains must form contiguous, non-overlapping ranges that cover the entire range of edge IDs. This is spelled out more formally below: 0 <= i < NumChains() Chain(i).length > 0, for all i Chain(0).start == 0 Chain(i).star

(chainID int)

Source from the content-addressed store, hash-verified

215	// Chain(i).start + Chain(i).length == Chain(i+1).start, for i < NumChains()-1
216	// Chain(i).start + Chain(i).length == NumEdges(), for i == NumChains()-1
217	Chain(chainID int) Chain
218
219	// ChainEdge returns the edge at offset "offset" within edge chain "chainID".
220	// Equivalent to "shape.Edge(shape.Chain(chainID).start + offset)"

Callers 14

TestPolylineShapeFunction · 0.95

TestLaxLoopNonEmptyLoopFunction · 0.65

TestPointVectorBasicsFunction · 0.65

TestLaxPolylineEdgeAccessFunction · 0.65

visitContainingShapesMethod · 0.65

referencePointForShapeFunction · 0.65

TestLoopBasicFunction · 0.65

TestPolygonFullFunction · 0.65

TestPolygonShapeFunction · 0.65

shapeIndexDebugStringFunction · 0.65

visitContainingShapesMethod · 0.65

TestLaxPolygonSingleVertexPolygonFunction · 0.65

Implementers 6

Loops2/loop.go

LaxLoops2/lax_loop.go

Polygons2/polygon.go

LaxPolylines2/lax_polyline.go

edgeVectorShapes2/edge_vector_shape_test.go

LaxPolygons2/lax_polygon.go

Calls

no outgoing calls

Tested by 11

TestPolylineShapeFunction · 0.76

TestLaxLoopNonEmptyLoopFunction · 0.52

TestPointVectorBasicsFunction · 0.52

TestLaxPolylineEdgeAccessFunction · 0.52

TestLoopBasicFunction · 0.52

TestPolygonFullFunction · 0.52

TestPolygonShapeFunction · 0.52

shapeIndexDebugStringFunction · 0.52

TestLaxPolygonSingleVertexPolygonFunction · 0.52

TestLaxPolygonShapeSingleLoopPolygonFunction · 0.52

TestLaxPolygonShapeMultiLoopPolygonFunction · 0.52