Snaps (nodes) all interacting segments to this hot pixel. The hot pixel may represent a vertex of an edge, in which case this routine uses the optimization of not noding the vertex itself
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Parameters:
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hotPixel - hotPixel the hot pixel to snap to
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parentEdge - parentEdge the edge containing the vertex, if applicable, or
null
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hotPixelVertexIndex - hotPixelVertexIndex the index of the hotPixel vertex, if applicable, or -1
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Returns:
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true if a node was added for this pixel