Line vs Plane: Difference between revisions
Nikitaivanov (talk | contribs) (Created page with "Finds the point at which a line intersects a plane. /uploads/Line vs Plane.png Inputs: * Line From: Line's starting position * Line To: Line's end position * Plane Point: A position in the plane (defaults to 0,0,0 if unwired) * Plane Normal: A vector perpendicular to the plane (i.e. the direction the plane is pointing at, or the angle of the plane) Outputs: * Intersection: The point where the line intersects the plane (or nan if there...") |
(Updated and revisited the page) |
||
| Line 1: | Line 1: | ||
{{Block | |||
|image=Line vs Plane.png | |||
|type=s | |||
|folder=math | |||
|input1={{Port|v|Line From}} | |||
|input2={{Port|v|Line To}} | |||
|input3={{Port|v|Plane Point}} | |||
|input4={{Port|v|Plane Normal}} | |||
|output1={{Port|v|Intersection}} | |||
}} | |||
Finds the point at which a line intersects a plane. | Finds the point at which a line intersects a plane. | ||
== Notes == | == Notes == | ||
* It's a line, not a line segment, so the intersection will be found even if it's not in-between the line's from/to positions. | * It's a line, not a line segment, so the intersection will be found even if it's not in-between the line's from/to positions. | ||
* Plane Point is a position on the plane. | |||
: Plane Normal is a vector perpendicular to the plane (i.e. the direction the plane is pointing at, or the angle of the plane). | |||
* The output is NaN if the line does not intersect the plane. | |||
: This happens if the line is parallel to the plane or plane normal is (0,0,0) | |||
== Example == | == Example == | ||
| Line 20: | Line 24: | ||
A common use case for Line vs Plane is to find the world coordinate of the user's finger: | A common use case for Line vs Plane is to find the world coordinate of the user's finger: | ||
{{Image|Line vs plane example1.png|Place a block on the floor where the player touches}} | |||
The finger touches a 2D screen, but there's a whole bunch 3D points along a line | The finger touches a 2D screen, but there's a whole bunch 3D points along a line ''into'' the scene, which are all at that 2D coordinate. | ||
So the above script first uses [[Screen To World]] to get two points on that line, and then Line vs Plane to pick out the ''one'' position that lies on the floor plane (point 0,0,0 and normal 0,1,0). | |||
As a result, the Wood block will move to the finger! | |||
[[Category:Blocks]] | [[Category:Blocks]] | ||
Latest revision as of 21:09, 19 May 2024
Line vs Plane
| Type | Script block |
| Collider | None |
| Folder | Math |
| Ports | |
|---|---|
| Inputs | Line From Line To Plane Point Plane Normal |
| Outputs | Intersection |
Finds the point at which a line intersects a plane.
Notes
- It's a line, not a line segment, so the intersection will be found even if it's not in-between the line's from/to positions.
- Plane Point is a position on the plane.
- Plane Normal is a vector perpendicular to the plane (i.e. the direction the plane is pointing at, or the angle of the plane).
- The output is NaN if the line does not intersect the plane.
- This happens if the line is parallel to the plane or plane normal is (0,0,0)
Example
A common use case for Line vs Plane is to find the world coordinate of the user's finger:
The finger touches a 2D screen, but there's a whole bunch 3D points along a line into the scene, which are all at that 2D coordinate. So the above script first uses Screen To World to get two points on that line, and then Line vs Plane to pick out the one position that lies on the floor plane (point 0,0,0 and normal 0,1,0). As a result, the Wood block will move to the finger!