public void Process(object sender, MessageQueueEventArgs e)
{
#if !SINGLE_THREADED
_context.MakeCurrent();
#endif
ShapefileRequest request = (ShapefileRequest)e.Message;
ShapefileRenderer shapefile = new ShapefileRenderer(
request.Filename, _context, _globeShape, request.Appearance);
#if !SINGLE_THREADED
Fence fence = Device.CreateFence();
while (fence.ClientWait(0) == ClientWaitResult.TimeoutExpired)
{
Thread.Sleep(10); // Other work, etc.
}
#endif
_doneQueue.Post(shapefile);
}
public VectorData()
{
Ellipsoid globeShape = Ellipsoid.ScaledWgs84;
_window = Device.CreateWindow(800, 600, "Chapter 7: Vector Data");
_window.Resize += OnResize;
_window.RenderFrame += OnRenderFrame;
_window.Keyboard.KeyDown += OnKeyDown;
_window.Keyboard.KeyUp += OnKeyUp;
_sceneState = new SceneState();
_camera = new CameraLookAtPoint(_sceneState.Camera, _window, globeShape);
Context context = _window.Context;
// 创建帧缓冲对象
_framebuffer = context.CreateFramebuffer();
_clearBlack = new ClearState();
_clearBlack.Color = Color.Black;
_clearWhite = new ClearState();
_clearWhite.Color = Color.White;
// 创建视口矩形
_quad = new DayNightViewportQuad(context);
_globe = new DayNightGlobe(context);
_globe.Shape = globeShape;
_globe.UseAverageDepth = true;
_globe.DayTexture = Device.CreateTexture2D(new Bitmap("NE2_50M_SR_W_4096.jpg"), TextureFormat.RedGreenBlue8, false);
_globe.NightTexture = Device.CreateTexture2D(new Bitmap("land_ocean_ice_lights_2048.jpg"), TextureFormat.RedGreenBlue8, false);
_countries = new ShapefileRenderer("110m_admin_0_countries.shp", context, globeShape,
new ShapefileAppearance()
{
PolylineWidth = 1.0,
PolylineOutlineWidth = 1.0
});
_states = new ShapefileRenderer("110m_admin_1_states_provinces_lines_shp.shp", context, globeShape,
new ShapefileAppearance()
{
PolylineWidth = 1.0,
PolylineOutlineWidth = 1.0
});
_rivers = new ShapefileRenderer("50m-rivers-lake-centerlines.shp", context, globeShape,
new ShapefileAppearance()
{
PolylineColor = Color.LightBlue,
PolylineOutlineColor = Color.LightBlue,
PolylineWidth = 1.0,
PolylineOutlineWidth = 0.0
});
_populatedPlaces = new ShapefileRenderer("110m_populated_places_simple.shp", context, globeShape,
new ShapefileAppearance()
{
Bitmap = new Bitmap("032.png")
});
_airports = new ShapefileRenderer("airprtx020.shp", context, globeShape,
new ShapefileAppearance()
{
Bitmap = new Bitmap("car-red.png")
});
_amtrakStations = new ShapefileRenderer("amtrakx020.shp", context, globeShape,
new ShapefileAppearance()
{
Bitmap = new Bitmap("paper-plane--arrow.png")
});
_hudFont = new Font("Arial", 16);
_hud = new HeadsUpDisplay();
_hud.Color = Color.Blue;
_showVectorData = true;
_sceneState.DiffuseIntensity = 0.5f;
_sceneState.SpecularIntensity = 0.1f;
_sceneState.AmbientIntensity = 0.4f;
_sceneState.Camera.ZoomToTarget(globeShape.MaximumRadius);
UpdateHUD();
}
