private static Point3D?CastRay_Sphere(Point3D center, double radius, RayHitTestParameters mouseDownClickRay, RayHitTestParameters mouseDownCenterRay, RayHitTestParameters currentClickRay)
{
// Get points on the sphere
Point3D[] nearestSpherePoints, nearestLinePoints;
Math3D.GetClosestPoints_Sphere_Line(out nearestSpherePoints, out nearestLinePoints, center, radius, currentClickRay.Origin, currentClickRay.Direction, Math3D.RayCastReturn.ClosestToRay);
Point3D currentClickPoint = nearestSpherePoints[0];
//TODO: The rest of this method is flawed, it should be fixed (I don't think it's as simplistic as I'm making it - or there is just a flaw in the math)
// Actually, I think the flaw is taking it to world coords, rotating, and putting back?
return(currentClickPoint);
//Math3D.GetClosestPointsBetweenLineSphere(out nearestSpherePoints, out nearestLinePoints, center, radius, mouseDownClickRay.Origin, mouseDownClickRay.Direction, Math3D.RayCastReturn.ClosestToRay);
//Point3D mouseDownClickPoint = nearestSpherePoints[0];
//Math3D.GetClosestPointsBetweenLineSphere(out nearestSpherePoints, out nearestLinePoints, center, radius, mouseDownCenterRay.Origin, mouseDownCenterRay.Direction, Math3D.RayCastReturn.ClosestToRay);
//Point3D mouseDownCenterPoint = nearestSpherePoints[0];
//// Get the offset from mouse down click to center
//Vector3D mouseDownClickLine = mouseDownClickPoint - center;
//Vector3D mouseDownCenterLine = mouseDownCenterPoint - center;
//Quaternion offset = Math3D.GetRotation(mouseDownClickLine, mouseDownCenterLine);
//// Convert to local coords, rotate
//Vector3D currentClickLine = currentClickPoint - center;
//currentClickLine = new RotateTransform3D(new QuaternionRotation3D(offset)).Transform(currentClickLine);
//// Now convert back to world coords
//return center + currentClickLine;
}
/// <summary>
/// This overload is a straight ray cast, nothing extra
/// </summary>
public Point3D?CastRay(RayHitTestParameters ray)
{
Point3D?retVal = null;
switch (_shape)
{
case ShapeType.Line:
#region Line
Point3D?point1, point2;
if (Math3D.GetClosestPoints_Line_Line(out point1, out point2, _point, _direction, ray.Origin, ray.Direction))
{
retVal = point1.Value;
}
#endregion
break;
case ShapeType.Lines:
#region Lines
retVal = CastRay_LinesCircles(_lines, null, ray);
#endregion
break;
case ShapeType.Plane:
#region Plane
retVal = Math3D.GetIntersection_Plane_Line(_plane, ray.Origin, ray.Direction);
#endregion
break;
case ShapeType.Circle:
#region Circle
Point3D[] nearestCirclePoints, nearestLinePoints;
if (Math3D.GetClosestPoints_Circle_Line(out nearestCirclePoints, out nearestLinePoints, _plane, _point, _radius, ray.Origin, ray.Direction, Math3D.RayCastReturn.ClosestToRay))
{
retVal = nearestCirclePoints[0];
}
#endregion
break;
case ShapeType.Circles:
#region Circles
retVal = CastRay_LinesCircles(null, _circles, ray);
#endregion
break;
case ShapeType.LinesCircles:
#region LinesCircles
retVal = CastRay_LinesCircles(_lines, _circles, ray);
#endregion
break;
case ShapeType.Cylinder:
#region Cylinder
Point3D[] nearestCylinderPoints, nearestLinePoints2;
if (Math3D.GetClosestPoints_Cylinder_Line(out nearestCylinderPoints, out nearestLinePoints2, _point, _direction, _radius, ray.Origin, ray.Direction, Math3D.RayCastReturn.ClosestToRay))
{
retVal = nearestCylinderPoints[0];
}
#endregion
break;
case ShapeType.Sphere:
#region Sphere
Point3D[] nearestSpherePoints, nearestLinePoints3;
Math3D.GetClosestPoints_Sphere_Line(out nearestSpherePoints, out nearestLinePoints3, _point, _radius, ray.Origin, ray.Direction, Math3D.RayCastReturn.ClosestToRay);
{
retVal = nearestSpherePoints[0];
}
#endregion
break;
case ShapeType.Mesh:
throw new ApplicationException("finish this");
case ShapeType.None:
retVal = null;
break;
default:
throw new ApplicationException("Unknown ShapeType: " + _shape.ToString());
}
return(retVal);
}
