# 3.9.7: Line-Line Intersection

This component takes two lists of lines as input: "**Intersecting**" lines and lines "**ToIntersect**". It tests which of the lines in "**ToIntersect**" get intersected by lines in "**Intersecting**". Output-plug **“IP”** delivers a list of intersection points. **“LSS”** returns all the line-segments resulting from the intersection. There is a one-to-one correspondence between the list of input lines in "**ToIntersect**" and the data-tree branches with line-segments at **“LSS”**. The input-plug **“LDist”** sets the tolerance length in meter for finding intersections between lines that do not actually intersect. **“LDist”** is also the minimum length of segments at the ends of lines (e.g. at T-intersections). The component can deal with corner cases where intersecting line lie within lines to intersect or touch them (see fig. 3.9.7.1).

<figure><img src="/files/wLGMjh2SKuIgyXvlW0iC" alt=""><figcaption><p>Fig. 3.9.7.1: Intersection of sets of lines.</p></figcaption></figure>

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