/// <summary>
/// Adjusts the height of the specified vertex, updating the terrain.
/// </summary>
/// <param name="vert">The adjusted vertex.</param>
/// <param name="h">The height that will be added.</param>
public void AdjustVertexHeight(GridVertex vert, float h)
{
HeightMap[vert.U, vert.V] += h;
Body.Shape.Heights[vert.U, vert.V] += h;
int index = ((vert.U - 1) * Size + vert.V) * 3;
int s3 = Size * 3;
Vector3 point = vert.ToCartesianCoords3D(HeightMap);
Builder.Vertices[index - s3 - 1] = point;
Builder.Vertices[index - 3] = point;
Builder.Vertices[index + s3 - 2] = point;
Builder.Vertices[index - s3 + 1] = point;
Builder.Vertices[index] = point;
Builder.Vertices[index + s3 + 2] = point;
Rend.GenerateVBO(Builder);
}