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Add function for adding an edge between nodes referenced by their IDs

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This commit is contained in:
Robert Machmer 2016-01-09 03:41:31 +01:00
parent 732037bd04
commit 9017b40da9
1 changed files with 26 additions and 8 deletions
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34
fd/Graph.lua
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@ -36,6 +36,23 @@ function Graph.new()
return math.min( minX or nx, nx ), math.max( maxX or nx, nx ), math.min( minY or ny, ny ), math.max( maxY or ny, ny );
end
---
-- Adds a new edge between two nodes.
-- @param origin - The node from which the edge originates.
-- @param target - The node to which the edge is pointing to.
--
local function addEdge( origin, target )
for _, edge in pairs( edges ) do
if edge.origin == origin and edge.target == target then
error "Trying to connect nodes which are already connected.";
end
end
assert( origin ~= target, "Tried to connect a node with itself." );
edges[edgeIDs] = Edge.new( edgeIDs, origin, target );
edgeIDs = edgeIDs + 1;
end
-- ------------------------------------------------
-- Public Functions
-- ------------------------------------------------
@ -96,15 +113,16 @@ function Graph.new()
-- @param target - The node to which the edge is pointing to.
--
function self:connectNodes( origin, target )
for _, edge in pairs(edges) do
if edge.origin == origin and edge.target == target then
error "Trying to connect nodes which are already connected.";
end
end
addEdge( origin, target );
end
assert(origin ~= target, "Tried to connect a node with itself.");
edges[edgeIDs] = Edge.new( edgeIDs, origin, target );
edgeIDs = edgeIDs + 1;
---
-- Adds a new edge between two nodes referenced by their IDs.
-- @param origin - The node id from which the edge originates.
-- @param target - The node id to which the edge is pointing to.
--
function self:connectIDs( originID, targetID )
addEdge( nodes[originID], nodes[targetID] );
end
---