public static bool SetupFrustum(ViewportInfo vp, ClippingInfo clipping)
{
double n0 = vp.FrustumNear;
double f0 = vp.FrustumFar;
// Because picking relies heavily on the projection, we first set the
// viewport frustum here, capture and save it, then let the conduits
// do what ever they want with it...eventually the viewport will be put
// back to the captured state before leaving the pipeline...
ClippingInfo m_SavedClipping = clipping;
vp.SetFrustumNearFar(clipping.bbox_near, clipping.bbox_far,
clipping.min_near_dist, clipping.min_near_over_far,
clipping.target_dist
);
vp.GetFrustum(out m_SavedClipping.left,
out m_SavedClipping.right,
out m_SavedClipping.bottom,
out m_SavedClipping.top,
out m_SavedClipping.bbox_near,
out m_SavedClipping.bbox_far);
// Next, set the values that the pipeline will actually use...
if (!(AdjustFrustum(vp, clipping)))
{
return(false);
}
return(true);
}
/// <summary>
/// Find the Perspective viewport in the 3dm file and sets up the default view.
/// </summary>
public void LoadCamera()
{
if (App.Manager.CurrentModel == null)
{
return;
}
Camera = new ViewportInfo();
bool cameraIsInitialized = false;
int viewCount = App.Manager.CurrentModel.ModelFile.Views.Count;
// find first perspective viewport projection in file
if (viewCount > 0)
{
foreach (var view in App.Manager.CurrentModel.ModelFile.Views)
{
if (view.Viewport.IsPerspectiveProjection)
{
cameraIsInitialized = true;
Camera = view.Viewport;
Camera.TargetPoint = view.Viewport.TargetPoint;
Camera.SetScreenPort(0, (int)View.Bounds.Size.Width, 0, (int)View.Bounds.Size.Height, 1, 1000);
Camera.FrustumAspect = Camera.ScreenPortAspect;
Camera.SetFrustumNearFar(App.Manager.CurrentModel.BBox);
break;
}
}
}
// If there isn't one, then cook up a viewport from scratch...
if (!cameraIsInitialized)
{
Camera.SetScreenPort(0, (int)View.Bounds.Size.Width, 0, (int)View.Bounds.Size.Height, 1, 1000);
Camera.TargetPoint = new Rhino.Geometry.Point3d(0, 0, 0);
var plane = new Rhino.Geometry.Plane(Rhino.Geometry.Point3d.Origin, new Rhino.Geometry.Vector3d(-1, -1, -1));
Camera.SetCameraLocation(new Rhino.Geometry.Point3d(10, 10, 10));
var dir = new Rhino.Geometry.Vector3d(-1, -1, -1);
dir.Unitize();
Camera.SetCameraDirection(dir);
Camera.SetCameraUp(plane.YAxis);
Camera.SetFrustum(-1, 1, -1, 1, 0.1, 1000);
Camera.FrustumAspect = Camera.ScreenPortAspect;
Camera.IsPerspectiveProjection = true;
Camera.Camera35mmLensLength = 50;
if (App.Manager.CurrentModel != null)
{
if (App.Manager.CurrentModel.AllMeshes != null)
{
Camera.DollyExtents(App.Manager.CurrentModel.AllMeshes, 1.0);
}
}
}
}
private static bool AdjustFrustum(ViewportInfo vp, ClippingInfo clipping)
{
vp.SetFrustumNearFar(vp.FrustumNear * 0.1, vp.FrustumFar * 10);
return(true);
}