16.03. Intersection
Description
Given two straight line segments (represented as a start point and an end point), compute the point of intersection, if any. If there's no intersection, return an empty array.
The absolute error should not exceed 10^-6. If there are more than one intersections, return the one with smallest X axis value. If there are more than one intersections that have same X axis value, return the one with smallest Y axis value.
Example 1:
Input:
line1 = {0, 0}, {1, 0}
line2 = {1, 1}, {0, -1}
Output: {0.5, 0}
Example 2:
Input:
line1 = {0, 0}, {3, 3}
line2 = {1, 1}, {2, 2}
Output: {1, 1}
Example 3:
Input:
line1 = {0, 0}, {1, 1}
line2 = {1, 0}, {2, 1}
Output: {} (no intersection)
Note:
- The absolute value of coordinate value will not exceed 2^7.
- All coordinates are valid 2D coordinates.