private float[] TargetProjectionHits(Vector3 target, ProjectionEdgeHits alongAxis, float projectionPlaneDistance, float halfFovRad)
{
float distanceFromProjectionPlane = projectionPlaneDistance - target.z;
float projectionHalfSpan = Mathf.Tan(halfFovRad) * distanceFromProjectionPlane;
if (alongAxis == ProjectionEdgeHits.LEFT_RIGHT)
{
return(new[] { target.x + projectionHalfSpan, target.x - projectionHalfSpan });
}
else
{
return(new[] { target.y + projectionHalfSpan, target.y - projectionHalfSpan });
}
}
private ProjectionHits ViewProjectionEdgeHits(IEnumerable <Vector3> targetsRotatedToCameraIdentity, ProjectionEdgeHits alongAxis, float projectionPlaneZ, float halfFovRad)
{
float[] projectionHits = targetsRotatedToCameraIdentity
.SelectMany(target => TargetProjectionHits(target, alongAxis, projectionPlaneZ, halfFovRad))
.ToArray();
return(new ProjectionHits(projectionHits.Max(), projectionHits.Min()));
}
