private static IGraphSource CreatePascalTriangleGraphSource(int levels)
{
var graph = new PascalTriangleGraphSource();
for (var i = 0; i < levels; i++)
{
for (var j = 0; j < i + 1; j++)
{
var node = new PascalNode {
Position = new Point {
Y = RootYPosition + (i * YDelimiterHeight),
X = RootXPosition - (i * XStartNegativeOffset) + (j * XDelimiterWidth)
},
PascalNumber = Binom(i, j),
IsTextBoxType = j % 2 == 0
};
graph.InternalItems.Add(node);
var currIndex = (i * (i + 1) / 2) + j;
if (j == 0) graph.InternalEdges.Add(new PascalEdge { Source = graph.InternalItems[currIndex - i], Target = node });
if (j == i && i != 0) graph.InternalEdges.Add(new PascalEdge { Source = graph.InternalItems[currIndex - i - 1], Target = node });
if (0 < j && j < i)
{
graph.InternalEdges.Add(new PascalEdge { Source = graph.InternalItems[currIndex - i - 1], Target = node });
graph.InternalEdges.Add(new PascalEdge { Source = graph.InternalItems[currIndex - i], Target = node });
}
}
}
return graph;
}
private static IGraphSource CreatePascalTriangleGraphSource(int levels)
{
var graph = new PascalTriangleGraphSource();
for (var i = 0; i < levels; i++)
{
for (var j = 0; j < i + 1; j++)
{
var node = new PascalNode {
Position = new Point {
Y = RootYPosition + (i * YDelimiterHeight),
X = RootXPosition - (i * XStartNegativeOffset) + (j * XDelimiterWidth)
},
PascalNumber = Binom(i, j),
IsTextBoxType = j % 2 == 0
};
graph.InternalItems.Add(node);
var currIndex = (i * (i + 1) / 2) + j;
if (j == 0)
{
graph.InternalEdges.Add(new PascalEdge {
Source = graph.InternalItems[currIndex - i], Target = node
});
}
if (j == i && i != 0)
{
graph.InternalEdges.Add(new PascalEdge {
Source = graph.InternalItems[currIndex - i - 1], Target = node
});
}
if (0 < j && j < i)
{
graph.InternalEdges.Add(new PascalEdge {
Source = graph.InternalItems[currIndex - i - 1], Target = node
});
graph.InternalEdges.Add(new PascalEdge {
Source = graph.InternalItems[currIndex - i], Target = node
});
}
}
}
return(graph);
}