public static void OrbitYZ(this Camera camera, double alpha)
{
var offset = camera.Frame.Offset;
var ex = camera.Frame.Ex;
var ey = camera.Frame.Ey;
var ez = camera.Frame.Ez;
var target = offset + ey * camera.Distance;
var back = Matrix44D.CreateCoordinateSystem(target, ex, ey, ez);
var trans = back.Inverse();
ey = new Vector3D(0.0, 1.0, 0.0);
ez = new Vector3D(0.0, 0.0, 1.0);
offset = trans * offset;
var rotateYZ = Matrix44D.CreateRotation(new Vector3D(1, 0, 0), alpha);
ey = rotateYZ * ey;
ez = rotateYZ * ez;
offset = rotateYZ * offset;
offset = back * offset;
ey = back * ey;
ez = back * ez;
ey.Normalize();
ez.Normalize();
var newFrame = Matrix44D.CreateCoordinateSystem(offset, ex, ez);
camera.Frame = newFrame;
}
public static void MoveTargetTo(this Camera camera, Position3D target)
{
var offset = target - (camera.Target - camera.Frame.Offset);
var ex = camera.Frame.Ex;
var ey = camera.Frame.Ey;
var ez = camera.Frame.Ez;
camera.Target = target;
camera.Frame = Matrix44D.CreateCoordinateSystem(offset, ex, ey, ez);
}
public void InverseTest_WhenStandardCoordinateSystemIsGiven_ThenInverseMultiplyWithCoordinateSystemIsIdentity()
{
var vec = Matrix44D.CreateCoordinateSystem(new Position3D(0.0, 0.0, 0.0), new Vector3D(1.0, 0.0, 0.0), new Vector3D(0.0, 0.0, 1.0));
var inverse = vec.Inverse();
var ident = inverse * vec;
Assert.Equal(Matrix44D.Identity, ident);
}
public void MultiplicationOperatorTest_WhenMatrixMultpliedWithYAxis_ThenResultVectorIsEyOfMatrix()
{
var ex = new Vector3D(1.0, 1.0, 0.0);
var ey = new Vector3D(-1.0, 1.0, 0.0);
var ez = new Vector3D(0.0, 0.0, 1.0);
var mat = Matrix44D.CreateCoordinateSystem(new Position3D(), ex, ey, ez);
var yAxis = new Vector3D(0.0, 1.0, 0.0);
var eyNew = mat * yAxis;
Assert.Equal(ey, eyNew);
}
public static void Zoom(this Camera camera, double delta)
{
if (delta >= camera.Distance)
{
delta = camera.Distance;
}
var offset = camera.Frame.Offset;
var ex = camera.Frame.Ex;
var ey = camera.Frame.Ey;
var ez = camera.Frame.Ez;
offset = offset + ey * delta;
camera.Frame = Matrix44D.CreateCoordinateSystem(offset, ex, ey, ez);
}
public void CreateCoordinateSystemTest_WhenCoordinateSystemIsCalledExEz_ThenExEyEzAreEqualToParametersAndAndTranslationIsOrigin()
{
var ex = new Vector3D(1.0, 0.0, 0.0);
var ez = new Vector3D(-1.0, 1.0, 0.0);
var mat = Matrix44D.CreateCoordinateSystem(ex, ez);
var ey = new Vector3D(0.0, 0.0, -1.0);
Assert.Equal(ex, mat.Ex);
Assert.Equal(ey, mat.Ey);
Assert.Equal(ez, mat.Ez);
Assert.Equal(new Position3D(), mat.Offset);
Assert.Equal(new Vector3D(), mat.Translation);
}
public void CreateCoordinateSystemTest_WhenCoordinateSystemIsCalledWithExEyEzAndTranslation_ThenExEyEzAndTranslationAreEqualToParameters()
{
var ex = new Vector3D(1.0, 0.0, 0.0);
var ey = new Vector3D(0.0, 0.0, -1.0);
var ez = new Vector3D(-1.0, 1.0, 0.0);
var offset = new Position3D(2, 3, 4);
var mat = Matrix44D.CreateCoordinateSystem(offset, ex, ey, ez);
Assert.Equal(ex, mat.Ex);
Assert.Equal(ey, mat.Ey);
Assert.Equal(ez, mat.Ez);
Assert.Equal(offset, mat.Offset);
Assert.Equal(offset.ToVector3D(), mat.Translation);
}
public static double CounterClockwiseAngleWith(this Vector3D first, Vector3D second)
{
double alpha = 0.0f;
// Calculates coordinate system of t_vecA as X axis
var ex = first.Normalize();
var ez = ex & second.Normalize();
var len = ez.Length;
if (len > ConstantsMath.Epsilon)
{
ez = ez.Normalize();
// Vectors are linear independent
var ey = ez & ex;
ey = ey.Normalize();
// Transforms t_vecB to this coordinate system
var origin = new Position3D(0.0f, 0.0f, 0.0f);
var matrix = Matrix44D.CreateCoordinateSystem(origin, ex, ey, ez).Inverse();
second = matrix * second;
// Angle between t_vecA as X-Axis and t_vecB
alpha = (second.X, second.Y).ToAngle();
}
else
{
// Vectors lies on same line
if (ex == second)
{
// Vectors have same direction
alpha = 0.0f;
}
else
{
// Vectors have opposite direction
alpha = ConstantsMath.Pi;
}
}
return(alpha);
}
public SceneStateDto GetScene(int canvasWidth, int canvasHeight)
{
var camera = new Camera();
camera.NearPlane = 1.0;
camera.Frame = Matrix44D.CreateCoordinateSystem(
new Position3D(-56.19932556152344, 77.98228454589844, 50.94441223144531),
new Vector3D(-0.7851186990737915, -0.6140340566635132, 0.07365952432155609),
new Vector3D(0.34082478284835815, -0.3296760022640228, 0.8801576495170593));
_scene.SetBodyStates(_bodyStates);
var sceneState = new SceneStateDto()
{
Camera = camera.ToCameraDto(),
BodyStates = _bodyStates,
DrawLines = _hiddenLineService.GetHiddenLineGraphics(_scene, camera, canvasWidth, canvasHeight).ToArray()
};
return(sceneState);
}
