Contents
How do you Intersect a polygon?
Polygons can intersect in three ways:
- Overlap—Area of overlap can be produced by leaving the Output Type to its default value (LOWEST).
- Common boundary/touch at a line—This type of intersection can be produced by specifying LINE as the Output Type.
How do you know if two polygons Intersect?
To be able to decide whether two convex polygons are intersecting (touching each other) we can use the Separating Axis Theorem. Essentially: If two convex polygons are not intersecting, there exists a line that passes between them. Such a line only exists if one of the sides of one of the polygons forms such a line.
What are the examples of convex polygon?
Real-world examples of convex polygons are a signboard, a football, a circular plate, and many more. In geometry, there are many shapes that can be classified as convex polygons. For example, a hexagon is a closed polygon with six sides.
How does the Intersect tool work with Polygon neighbors?
Overlapping neighbors—polygons that have all or part of their areas overlapping Edge neighbors—polygons that have common or touching boundaries Node neighbors—polygons that touch at a point (boundary crossing or touching) Neighboring polygons are found according to the same rules for polygons as the Intersect tool.
How are polygons that touch at a point found?
Node neighbors—polygons that touch at a point (boundary crossing or touching) Neighboring polygons are found according to the same rules for polygons as the Intersect tool. The following discussion assumes use of the tool dialog box. See the Polygon Neighbors tool documentation for scripting syntax.
When to use collision detection in polygons and circles?
So now we can check if a circle is colliding with a single border line from our polygon but only when the circle is closest to the border line. we haven’t done any checks for when the circle is closest to the start or end point of our line.
How do you find the neighbors of a polygon?
Find all the polygons that intersect the source polygon (find the neighbors). Add the AREA field to the output table. Calculate the area of the overlap. Record the calculated area for use in the output table AREA field. Record 0 for use in the output table LENGTH field.