# Convert Two Vector3 to Plane then find point where Ray intersects

Page 1 of 1

## 0 Replies - 2457 Views - Last Post: 21 September 2012 - 06:12 PM

### #1 rex64

Reputation: 6
• Posts: 168
• Joined: 31-January 12

# Convert Two Vector3 to Plane then find point where Ray intersects

Posted 21 September 2012 - 06:12 PM

I would like to convert Two Vector3 to Plane then find the point where ray intersects. I am looking for C, so that I can calculate the reflected velocity in the diagram. The reflected velocity Let me know if you see an easier way?

I am assuming that the wall continues infinitely (is a plane), even though the wall actually has a start and stop point.

I know:
A
Ships direction of travel (velocity)
Wall Point 1
Wall Point 2

I can easily find:
B (but my method may be slow)

```        public Vector3 getCollisionPointOnWall(Vector3 shipPointCenter, Vector3 shipVelocityAngle, Vector3 wallPoint1, Vector3 wallPoint2)
{
Vector3 pointOnWall = Vector3.Zero;

Plane wallPlane;
//wallPlane.Normal = Vector3.Normalize(wallPoint1);  //this will not be perpinducluar, we need to find a poitn on the plane that is perpinduclar.
//wallPlane.D=wallPoint1.
return pointOnWall;
}

/// <summary>
/// Finds the point (vector3) where the ray intersects the plane.
/// </summary>
Vector3 GetRayPlaneIntersectionPoint(Ray ray, Plane plane)
{
float? distance = ray.Intersects(plane);
return distance.HasValue ? ray.Position + ray.Direction * distance.Value : Vector3.Zero;
}

```

#### Attached image(s)

Is This A Good Question/Topic? 0

Page 1 of 1

 .related ul { list-style-type: circle; font-size: 12px; font-weight: bold; } .related li { margin-bottom: 5px; background-position: left 7px !important; margin-left: -35px; } .related h2 { font-size: 18px; font-weight: bold; } .related a { color: blue; }