public void TestRayAABBIntersect()
{
Vector3 rayStart = new Vector3(0, 0, 0);
Vector3 rayDir = new Vector3(0, 0, 1);
double s, t;
Bounds bounds = new Bounds(new Vector3(-1, -1, -1), new Vector3(1, 1, 1));
// Check that ray hits AABB (ray starts inside the bounds)
Assert.IsTrue(GeometryMath.IntersectAABB(rayStart, rayDir, bounds.Min, bounds.Max, out s, out t), "Expected to hit AABB but did not (ray starts inside AABB)");
rayStart = new Vector3(0, 0, -2);
// Check that ray hits AABB (ray starts outside the bounds)
Assert.IsTrue(GeometryMath.IntersectAABB(rayStart, rayDir, bounds.Min, bounds.Max, out s, out t), "Expected to hit AABB but did not (ray starts outside AABB)");
rayDir = new Vector3(0, 0, -1);
// Check that ray does not hit AABB (ray goes to other direction)
Assert.IsFalse(GeometryMath.IntersectAABB(rayStart, rayDir, bounds.Min, bounds.Max, out s, out t), "Expected to miss AABB but did not (ray goes away from AABB)");
rayStart = new Vector3(1, 0, -2);
rayDir = new Vector3(1, 0, 1);
// Check that ray does not hit AABB (ray is co-linear with one side of the AABB)
Assert.IsFalse(GeometryMath.IntersectAABB(rayStart, rayDir, bounds.Min, bounds.Max, out s, out t), "Expected to miss AABB but did not (ray is co-linear with one side of the AABB)");
}
protected virtual bool RayCheckInternal(int time, Vector3 rayStart, Vector3 rayDirection, out int triangleIndex, out bool hitOpaque, out Vector3 intersection)
{
hitOpaque = false;
triangleIndex = -1;
double tmin, tmax;
Bounds bounds = WorldBounds;
GeometryMath.IntersectAABB(rayStart, rayDirection, bounds.Min, bounds.Max, out tmin, out tmax);
intersection = WorldBounds.Center - rayDirection.GetNormalized() * Math.Min(tmin, tmax);
return(true);
}
public bool RayCheck(int time, Vector3 rayStart, Vector3 rayDirection, out int triangleIndex, out bool hitOpaque, out Vector3 intersection)
{
hitOpaque = false;
triangleIndex = 0;
intersection = new Vector3(0, 0, 0);
double tmin, tmax;
Bounds bounds = WorldBounds;
if (GeometryMath.IntersectAABB(rayStart, rayDirection, bounds.Min, bounds.Max, out tmin, out tmax))
{
return(RayCheckInternal(time, rayStart, rayDirection, out triangleIndex, out hitOpaque, out intersection));
}
return(false);
}
