public static Vector3D VectorBetweenPointsOnPlane(Viewport3D viewport, Plane3D plane, Point initialPoint, Point endPoint)
{
Size viewportSize = new Size(viewport.ActualWidth, viewport.ActualHeight);
Ray3D ray1 = CameraRayHelpers.RayFromViewportPoint(viewportSize, viewport.Camera, initialPoint);
Ray3D ray2 = CameraRayHelpers.RayFromViewportPoint(viewportSize, viewport.Camera, endPoint);
double t1;
double t2;
if (!plane.IntersectWithRay(ray1, out t1) || !plane.IntersectWithRay(ray2, out t2))
{
return(new Vector3D(0.0, 0.0, 0.0));
}
return(ray2.Evaluate(t2) - ray1.Evaluate(t1));
}
protected override void UpdateModelFromMouse(Base3DElement selected3DElement, Vector mousePositionDelta)
{
Vector3D normal = this.CalculateTransformationForSpotLightAdorner().Transform(new Vector3D(0.0, 0.0, 1.0));
normal.Normalize();
Plane3D plane3D = new Plane3D(normal, this.centerOfCone);
Viewport3DVisual adorningViewport3D = this.ActiveView.AdornerLayer.GetAdornerSet3DContainer(this.ActiveAdorner.Element.Viewport).ShadowAdorningViewport3D;
Ray3D ray = CameraRayHelpers.RayFromViewportPoint(adorningViewport3D.Viewport.Size, adorningViewport3D.Camera, this.LastMousePosition + mousePositionDelta);
double t;
if (!plane3D.IntersectWithRay(ray, out t))
{
return;
}
double num1 = Math.Atan((ray.Evaluate(t) - this.centerOfCone).Length / 1.0) / Math.PI * 180.0;
SpotLight spotLight = (SpotLight)this.Selected3DElement.ViewObject.PlatformSpecificObject;
if (this.ActiveAdorner.TypeOfConeAngle == SpotLightAdornerBehavior3D.TypeOfConeAngle.InnerConeAngle)
{
double num2 = spotLight.OuterConeAngle - spotLight.InnerConeAngle;
this.Selected3DElement.SetValue(SpotLightElement.InnerConeAngleProperty, (object)num1);
this.Selected3DElement.SetValue(SpotLightElement.OuterConeAngleProperty, (object)(num1 + num2));
}
else
{
this.Selected3DElement.SetValue(SpotLightElement.OuterConeAngleProperty, (object)num1);
}
this.ActiveAdorner.PositionAndOrientGeometry();
}
public static Vector3 CameraViewportPositionToScenePosition(
Camera camScene,
Vector2 viewportPos, // form 0 to 1
Plane3D plane
)
{
var ray = camScene.ViewportPointToRay(viewportPos);
return(plane.IntersectWithRay(ray));
}
