/// <summary>
/// Initializes a new instance of <see cref="Plane"/> from a <see cref="PlaneShape"/>.
/// </summary>
/// <param name="planeShape">
/// The <see cref="PlaneShape"/> from which normal vector and distance from origin are copied.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="planeShape"/> is <see langword="null"/>.
/// </exception>
public Plane(PlaneShape planeShape)
{
if (planeShape == null)
{
throw new ArgumentNullException("planeShape");
}
Normal = planeShape.Normal;
DistanceFromOrigin = planeShape.DistanceFromOrigin;
}
private void Update(bool invalidateRenderData)
{
if (invalidateRenderData)
RenderData.SafeDispose();
// Update shape.
if (Volume == null)
{
// Use a PlaneShape for an infinite ocean.
var planeShape = Shape as PlaneShape;
if (planeShape != null)
{
planeShape.Normal = new Vector3F(0, 1, 0);
planeShape.DistanceFromOrigin = ExtraHeight;
}
else
{
Shape = new PlaneShape(new Vector3F(0, 1, 0), ExtraHeight);
}
return;
}
// Check if we have a valid AABB.
var aabb = Volume.GetAabb();
if (!Numeric.IsZeroOrPositiveFinite(aabb.Extent.LengthSquared))
throw new GraphicsException("Invalid water volume. The water volume must be a finite shape or null.");
// Apply ExtraHeight. We also apply it horizontally because choppy waves
// move vertices horizontally too.
aabb.Minimum.X -= ExtraHeight;
// Minimum y should be at least max y - ExtraHeight.
aabb.Minimum.Y = Math.Min(aabb.Minimum.Y, aabb.Maximum.Y - ExtraHeight);
aabb.Minimum.Z -= ExtraHeight;
aabb.Maximum.X += ExtraHeight;
aabb.Maximum.Y += ExtraHeight;
aabb.Maximum.Z += ExtraHeight;
// Create shape from volume AABB.
if (aabb.Center.IsNumericallyZero)
{
// Use BoxShape.
var boxShape = Shape as BoxShape;
if (boxShape != null)
boxShape.Extent = aabb.Extent;
else
Shape = new BoxShape(aabb.Extent);
}
else
{
BoxShape boxShape = null;
var transformedShape = Shape as TransformedShape;
if (transformedShape != null)
boxShape = transformedShape.Child.Shape as BoxShape;
if (boxShape != null)
{
boxShape.Extent = aabb.Extent;
((GeometricObject)transformedShape.Child).Pose = new Pose(aabb.Center);
}
else
{
Shape = new TransformedShape(
new GeometricObject(new BoxShape(aabb.Extent), new Pose(aabb.Center)));
}
}
}
