private void GetBoundingSphere(ViewVolume viewVolume, out Vector3 center, out float radius)
{
float left = viewVolume.Left;
float top = viewVolume.Top;
float right = viewVolume.Right;
float bottom = viewVolume.Bottom;
float near = viewVolume.Near;
float far = viewVolume.Far;
_frustumCorners[0] = new Vector3(left, top, -near);
_frustumCorners[1] = new Vector3(right, top, -near);
_frustumCorners[2] = new Vector3(left, bottom, -near);
_frustumCorners[3] = new Vector3(right, bottom, -near);
float farOverNear = far / near;
left *= farOverNear;
top *= farOverNear;
right *= farOverNear;
bottom *= farOverNear;
_frustumCorners[4] = new Vector3(left, top, -far);
_frustumCorners[5] = new Vector3(right, top, -far);
_frustumCorners[6] = new Vector3(left, bottom, -far);
_frustumCorners[7] = new Vector3(right, bottom, -far);
GeometryHelper.ComputeBoundingSphere(_frustumCorners, out radius, out center);
}
public void SetOffCenter(float left, float right, float bottom, float top)
{
ViewVolume.Set(left, right, bottom, top);
Invalidate();
}
/// <summary>
/// Sets a symmetric, perspective projection based on size.
/// </summary>
/// <param name="width">The width of the frustum at the near clip plane.</param>
/// <param name="height">The height of the frustum at the near clip plane.</param>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="width"/> or <paramref name="height"/> is negative or 0.
/// </exception>
public void Set(float width, float height)
{
ViewVolume.SetWidthAndHeight(width, height);
Invalidate();
}
/// <overloads>
/// <summary>
/// Sets a symmetric, perspective projection based on width and height.
/// </summary>
/// </overloads>
///
/// <summary>
/// Sets a symmetric, perspective projection based on size and depth.
/// </summary>
/// <param name="width">The width of the frustum at the near clip plane.</param>
/// <param name="height">The height of the frustum at the near clip plane.</param>
/// <param name="near">The distance to the near clip plane.</param>
/// <param name="far">The distance to the far clip plane.</param>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="width"/> or <paramref name="height"/> is negative or 0.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="near"/> is greater than or equal to <paramref name="far"/>.
/// </exception>
public void Set(float width, float height, float near, float far)
{
ViewVolume.SetWidthAndHeight(width, height, near, far);
Invalidate();
}
