/// <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);
}
}
}
}
/// <summary>
/// Creates a default light and enables the active shader
/// </summary>
private void SetupShader(RhGLShaderProgram shader, RMModel model, ViewportInfo viewport)
{
// Check to make sure we actually have an active shader...
if (shader != null)
{
// Enable...
shader.Enable();
// Now setup and initialize frustum and lighting...
int near, far;
viewport.GetScreenPort(out near, out far);
viewport.SetScreenPort((int)Frame.Left, (int)Frame.Right, (int)Frame.Bottom, (int)Frame.Top, near, far);
shader.SetupViewport(viewport);
Rhino.Geometry.Light light = CreateDefaultLight();
shader.SetupLight(light);
light.Dispose();
}
}