public EllipsoidTangentPlane(Ellipsoid ellipsoid, IEnumerable<Vector3D> positions)
{
if (ellipsoid == null)
{
throw new ArgumentNullException("ellipsoid");
}
if (positions == null)
{
throw new ArgumentNullException("positions");
}
if (!CollectionAlgorithms.EnumerableCountGreaterThanOrEqual(positions, 1))
{
throw new ArgumentOutOfRangeException("positions", "At least one position is required.");
}
AxisAlignedBoundingBox box = new AxisAlignedBoundingBox(positions);
_origin = ellipsoid.ScaleToGeodeticSurface(box.Center);
_normal = ellipsoid.GeodeticSurfaceNormal(_origin);
_d = -_origin.Dot(_origin);
_yAxis = _origin.Cross(_origin.MostOrthogonalAxis).Normalize();
_xAxis = _yAxis.Cross(_origin).Normalize();
}
public void Simple()
{
Vector3D min = new Vector3D(-1, -1, -1);
Vector3D max = new Vector3D(1, 1, 1);
IList<Vector3D> positions = new List<Vector3D>();
positions.Add(min);
positions.Add(max);
AxisAlignedBoundingBox box = new AxisAlignedBoundingBox(positions);
Assert.AreEqual(min, box.Minimum);
Assert.AreEqual(max, box.Maximum);
Assert.AreEqual(Vector3D.Zero, box.Center);
}
public RelativeToCenter(Context context, Vector3D[] positions, byte[] colors)
{
_sp = Device.CreateShaderProgram(
EmbeddedResources.GetText("OpenGlobe.Examples.RelativeToCenter.Shaders.VS.glsl"),
EmbeddedResources.GetText("OpenGlobe.Examples.Shaders.FS.glsl"));
_modelViewPerspectiveMatrixRelativeToCenter = (Uniform<Matrix4F>)(_sp.Uniforms["u_modelViewPerspectiveMatrixRelativeToCenter"]);
_pointSize = (Uniform<float>)_sp.Uniforms["u_pointSize"];
///////////////////////////////////////////////////////////////////
Mesh mesh = new Mesh();
VertexAttributeFloatVector3 positionsAttribute = new VertexAttributeFloatVector3("position", positions.Length);
VertexAttributeRGB colorAttribute = new VertexAttributeRGB("color", positions.Length);
mesh.Attributes.Add(positionsAttribute);
mesh.Attributes.Add(colorAttribute);
_center = new AxisAlignedBoundingBox(positions).Center;
for (int i = 0; i < positions.Length; ++i)
{
positionsAttribute.Values.Add((positions[i] - _center).ToVector3F());
}
for (int i = 0; i < colors.Length; ++i)
{
colorAttribute.Values.Add(colors[i]);
}
_va = context.CreateVertexArray(mesh, _sp.VertexAttributes, BufferHint.StaticDraw);
///////////////////////////////////////////////////////////////////
RenderState renderState = new RenderState();
renderState.FacetCulling.Enabled = false;
renderState.DepthTest.Enabled = false;
renderState.ProgramPointSize = ProgramPointSize.Enabled;
_drawState = new DrawState(renderState, _sp, _va);
}
public void Empty()
{
AxisAlignedBoundingBox box = new AxisAlignedBoundingBox(new List<Vector3D>());
Assert.AreEqual(new Vector3D(double.MinValue, double.MinValue, double.MinValue), box.Minimum);
Assert.AreEqual(new Vector3D(double.MaxValue, double.MaxValue, double.MaxValue), box.Maximum);
}
