Пример #1
0
        public TerrainRayCasting()
        {
            _window = Device.CreateWindow(800, 600, "Chapter 11:  Terrain Ray Casting");
            _window.Resize += OnResize;
            _window.RenderFrame += OnRenderFrame;
            _window.Keyboard.KeyDown += OnKeyDown;
            _sceneState = new SceneState();
            _sceneState.Camera.PerspectiveFarPlaneDistance = 4096;
            _clearState = new ClearState();

            ///////////////////////////////////////////////////////////////////

            TerrainTile terrainTile = TerrainTile.FromBitmap(new Bitmap(@"ps-e.lg.png"));
            _tile = new RayCastedTerrainTile(terrainTile);
            _tile.HeightExaggeration = 30;

            ///////////////////////////////////////////////////////////////////

            double tileRadius = Math.Max(terrainTile.Resolution.X, terrainTile.Resolution.Y) * 0.5;
            _camera = new CameraLookAtPoint(_sceneState.Camera, _window, Ellipsoid.UnitSphere);
            _camera.CenterPoint = new Vector3D(terrainTile.Resolution.X * 0.5, terrainTile.Resolution.Y * 0.5, 0.0);
            _camera.MinimumRotateRate = 1.0;
            _camera.MaximumRotateRate = 1.0;
            _camera.RotateRateRangeAdjustment = 0.0;
            _camera.RotateFactor = 0.0;
            _sceneState.Camera.ZoomToTarget(tileRadius);
            
            ///////////////////////////////////////////////////////////////////

            _hudFont = new Font("Arial", 16);
            _hud = new HeadsUpDisplay();
            _hud.Color = Color.Black;
            UpdateHUD();
        }
        public EllipsoidSurfaceNormals()
        {
            _globeShape = new Ellipsoid(1, 1, _semiMinorAxis);

            _window = Device.CreateWindow(800, 600, "Chapter 2:  Ellipsoid Surface Normals");
            _window.Resize += OnResize;
            _window.RenderFrame += OnRenderFrame;
            _window.Keyboard.KeyDown += OnKeyDown;
            _sceneState = new SceneState();
            _camera = new CameraLookAtPoint(_sceneState.Camera, _window, _globeShape);

            _instructions = new HeadsUpDisplay();
            _instructions.Texture = Device.CreateTexture2D(
                Device.CreateBitmapFromText("Up - Increase semi-minor axis\nDown - Decrease semi-minor axis", 
                    new Font("Arial", 24)),
                TextureFormat.RedGreenBlueAlpha8, false);
            _instructions.Color = Color.Black;

            _clearState = new ClearState();

            CreateScene();
            
            ///////////////////////////////////////////////////////////////////

            _sceneState.Camera.Eye = Vector3D.UnitY;
            _sceneState.Camera.ZoomToTarget(2 * _globeShape.MaximumRadius);
        }
Пример #3
0
        public DepthBufferPrecision()
        {
            _globeShape = Ellipsoid.Wgs84;
            _nearDistance = 1;
            _cubeRootFarDistance = 300;

            _window = Device.CreateWindow(800, 600, "Chapter 6:  Depth Buffer Precision");
            _window.Resize += OnResize;
            _window.RenderFrame += OnRenderFrame;
            _window.Keyboard.KeyUp += OnKeyUp;
            _window.Keyboard.KeyDown += OnKeyDown;
            _sceneState = new SceneState();
            _sceneState.DiffuseIntensity = 0.45f;
            _sceneState.SpecularIntensity = 0.05f;
            _sceneState.AmbientIntensity = 0.5f;

            _camera = new CameraLookAtPoint(_sceneState.Camera, _window, _globeShape);

            _sceneState.Camera.ZoomToTarget(_globeShape.MaximumRadius);

            ///////////////////////////////////////////////////////////////////

            _globe = new TessellatedGlobe();
            _globe.Shape = _globeShape;
            _globe.NumberOfSlicePartitions = 64;
            _globe.NumberOfStackPartitions = 32;
            _globe.Texture = Device.CreateTexture2D(new Bitmap("world_topo_bathy_200411_3x5400x2700.jpg"), TextureFormat.RedGreenBlue8, false);
            _globe.Textured = true;

            _plane = new Plane(_window.Context);
            _plane.XAxis = 0.6 * _globeShape.MaximumRadius * Vector3D.UnitX;
            _plane.YAxis = 0.6 * _globeShape.MinimumRadius * Vector3D.UnitZ;
            _plane.OutlineWidth = 3;
            _cubeRootPlaneHeight = 100.0;
            UpdatePlaneOrigin();

            _viewportQuad = new ViewportQuad(_window.Context, null);

            _framebuffer = _window.Context.CreateFramebuffer();
            _depthFormatIndex = 1;
            _depthTestLess = true;
            _logarithmicDepthConstant = 1;
            UpdatePlanesAndDepthTests();

            _clearState = new ClearState();

            ///////////////////////////////////////////////////////////////////

            _hudFont = new Font("Arial", 16);
            _hud = new HeadsUpDisplay();
            _hud.Color = Color.Blue;
            UpdateHUD();
        }
Пример #4
0
        public Jitter()
        {
            _window = Device.CreateWindow(800, 600, "Chapter 5:  Jitter");
            _window.Resize += OnResize;
            _window.RenderFrame += OnRenderFrame;
            _window.Keyboard.KeyUp += OnKeyUp;
            _sceneState = new SceneState();
            _clearState = new ClearState();

            _hudFont = new Font("Arial", 16);
            _hud = new HeadsUpDisplay();
            _hud.Color = Color.Black;

            CreateCamera();
            CreateAlgorithm();
        }
        public ClipmapTerrainOnGlobe()
        {
            _window = Device.CreateWindow(800, 600, "Chapter 13:  Clipmap Terrain on a Globe");

            _ellipsoid = Ellipsoid.Wgs84;

            WorldWindTerrainSource terrainSource = new WorldWindTerrainSource();
            EsriRestImagery imagery = new EsriRestImagery();
            _clipmap = new GlobeClipmapTerrain(_window.Context, terrainSource, imagery, _ellipsoid, 511);
            _clipmap.HeightExaggeration = 1.0f;

            _sceneState = new SceneState();
            _sceneState.DiffuseIntensity = 0.90f;
            _sceneState.SpecularIntensity = 0.05f;
            _sceneState.AmbientIntensity = 0.05f;
            _sceneState.Camera.FieldOfViewY = Math.PI / 3.0;

            _clearState = new ClearState();
            _clearState.Color = Color.White;

            _sceneState.Camera.PerspectiveNearPlaneDistance = 0.000001 * _ellipsoid.MaximumRadius;
            _sceneState.Camera.PerspectiveFarPlaneDistance = 10.0 * _ellipsoid.MaximumRadius;
            _sceneState.SunPosition = new Vector3D(200000, 300000, 200000) * _ellipsoid.MaximumRadius;

             _lookCamera = new CameraLookAtPoint(_sceneState.Camera, _window, _ellipsoid);
             _lookCamera.Range = 1.5 * _ellipsoid.MaximumRadius;

             _globe = new RayCastedGlobe(_window.Context);
             _globe.Shape = _ellipsoid;
             Bitmap bitmap = new Bitmap("NE2_50M_SR_W_4096.jpg");
             _globe.Texture = Device.CreateTexture2D(bitmap, TextureFormat.RedGreenBlue8, false);

             _clearDepth = new ClearState();
             _clearDepth.Buffers = ClearBuffers.DepthBuffer | ClearBuffers.StencilBuffer;

            _window.Keyboard.KeyDown += OnKeyDown;

            _window.Resize += OnResize;
            _window.RenderFrame += OnRenderFrame;
            _window.PreRenderFrame += OnPreRenderFrame;

            _hudFont = new Font("Arial", 16);
            _hud = new HeadsUpDisplay();
            _hud.Color = Color.Blue;
            UpdateHUD();
        }
Пример #6
0
        public Curves()
        {
            _semiMinorAxis = Ellipsoid.ScaledWgs84.Radii.Z;
            SetShape();

            _window = Device.CreateWindow(800, 600, "Chapter 2:  Curves");
            _window.Resize += OnResize;
            _window.RenderFrame += OnRenderFrame;
            _window.Keyboard.KeyDown += OnKeyDown;
            _sceneState = new SceneState();
            _camera = new CameraLookAtPoint(_sceneState.Camera, _window, _globeShape);

            _clearState = new ClearState();

            _texture = Device.CreateTexture2D(new Texture2DDescription(1, 1, TextureFormat.RedGreenBlue8));
            WritePixelBuffer pixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream, 3);
            pixelBuffer.CopyFromSystemMemory(new byte[] { 0, 255, 127 });
            _texture.CopyFromBuffer(pixelBuffer, ImageFormat.RedGreenBlue, ImageDatatype.UnsignedByte, 1);

            _instructions = new HeadsUpDisplay();
            _instructions.Color = Color.Black;
            
            _sampledPoints = new BillboardCollection(_window.Context);
            _sampledPoints.Texture = Device.CreateTexture2D(Device.CreateBitmapFromPoint(8), TextureFormat.RedGreenBlueAlpha8, false);
            _sampledPoints.DepthTestEnabled = false;
            
            _ellipsoid = new RayCastedGlobe(_window.Context);
            _ellipsoid.Texture = _texture;

            _polyline = new Polyline();
            _polyline.Width = 3;
            _polyline.DepthTestEnabled = false;

            _plane = new Plane(_window.Context);
            _plane.Origin = Vector3D.Zero;
            _plane.OutlineWidth = 3;

            CreateScene();
            
            ///////////////////////////////////////////////////////////////////

            _sceneState.Camera.Eye = Vector3D.UnitY;
            _sceneState.Camera.ZoomToTarget(2 * _globeShape.MaximumRadius);
        }
Пример #7
0
        private void myButton1_Click(object sender, EventArgs e)
        {
            _window = Device.CreateWindow(800, 600, "Chapter 13:  Clipmap Terrain on a Globe");

            _ellipsoid = Ellipsoid.Wgs84;

            WorldWindTerrainSource terrainSource = new WorldWindTerrainSource();
            GMapRestImagery imagery = new GMapRestImagery();
            _clipmap = new GlobeClipmapTerrain(_window.Context, terrainSource, imagery, _ellipsoid, 511);
            _clipmap.HeightExaggeration = 1.0f;

            IList<GridResolution> gridResolutions = new List<GridResolution>();
            gridResolutions.Add(new GridResolution(
                new Interval(0, 1000000, IntervalEndpoint.Closed, IntervalEndpoint.Open),
                new Vector2D(0.005, 0.005)));
            gridResolutions.Add(new GridResolution(
                new Interval(1000000, 2000000, IntervalEndpoint.Closed, IntervalEndpoint.Open),
                new Vector2D(0.01, 0.01)));
            gridResolutions.Add(new GridResolution(
                new Interval(2000000, 20000000, IntervalEndpoint.Closed, IntervalEndpoint.Open),
                new Vector2D(0.05, 0.05)));
            gridResolutions.Add(new GridResolution(
                new Interval(20000000, double.MaxValue, IntervalEndpoint.Closed, IntervalEndpoint.Open),
                new Vector2D(0.1, 0.1)));

            _sceneState = new SceneState();
            _sceneState.DiffuseIntensity = 0.90f;
            _sceneState.SpecularIntensity = 0.05f;
            _sceneState.AmbientIntensity = 0.05f;
            _sceneState.Camera.FieldOfViewY = Math.PI / 3.0;

            _clearState = new ClearState();
            _clearState.Color = Color.White;

            _sceneState.Camera.PerspectiveNearPlaneDistance = 0.000001 * _ellipsoid.MaximumRadius;
            _sceneState.Camera.PerspectiveFarPlaneDistance = 10.0 * _ellipsoid.MaximumRadius;
            _sceneState.SunPosition = new Vector3D(200000, 300000, 200000) * _ellipsoid.MaximumRadius;

            _lookCamera = new CameraLookAtPoint(_sceneState.Camera, _window, _ellipsoid);
            _lookCamera.Range = 1.5 * _ellipsoid.MaximumRadius;

            _globe = new RayCastedGlobe(_window.Context);
            _globe.Shape = _ellipsoid;
            Bitmap bitmap = new Bitmap("NE2_50M_SR_W_4096.jpg");
            _globe.Texture = Device.CreateTexture2D(bitmap, TextureFormat.RedGreenBlue8, false);
            //_globe.GridResolutions = new GridResolutionCollection(gridResolutions);

            _clearDepth = new ClearState();
            _clearDepth.Buffers = ClearBuffers.DepthBuffer | ClearBuffers.StencilBuffer;

            //_window.Keyboard.KeyDown += OnKeyDown;

            _window.Resize += OnResize;
            _window.RenderFrame += OnRenderFrame;
            _window.PreRenderFrame += OnPreRenderFrame;

            _hudFont = new Font("Arial", 16);
            _hud = new HeadsUpDisplay();
            _hud.Color = Color.Blue;

            //_flyCamera = new CameraFly(_sceneState.Camera, _window);
            //_flyCamera.MovementRate = 1200.0;
            //_flyCamera.InputEnabled = true;

            _sceneState.Camera.Target = new Vector3D(115, -35, 100.0);

            _window.Run(30);
        }
Пример #8
0
        public LinesOnTerrain()
        {
            _window = Device.CreateWindow(800, 600, "Research:  Lines on Terrain");
            _window.Resize += OnResize;
            _window.RenderFrame += OnRenderFrame;
            _window.Keyboard.KeyDown += OnKeyDown;
            _sceneState = new SceneState();
            _sceneState.Camera.PerspectiveFarPlaneDistance = 4096;
            _sceneState.Camera.PerspectiveNearPlaneDistance = 10;
            
            _instructions = new HeadsUpDisplay();
            _instructions.Texture = Device.CreateTexture2D(
                Device.CreateBitmapFromText(
                    "u - Use silhouette\ns - Show silhouette\n",
                    new Font("Arial", 24)),
                TextureFormat.RedGreenBlueAlpha8, false);
            _instructions.Color = Color.LightBlue;

            ///////////////////////////////////////////////////////////////////

            TerrainTile terrainTile = TerrainTile.FromBitmap(new Bitmap(@"ps-e.lg.png"));
            _tile = new TriangleMeshTerrainTile(_window.Context, terrainTile);
            _tile.HeightExaggeration = 30.0f;

            ///////////////////////////////////////////////////////////////////

            double tileRadius = Math.Max(terrainTile.Resolution.X, terrainTile.Resolution.Y) * 0.5;
            _camera = new CameraLookAtPoint(_sceneState.Camera, _window, Ellipsoid.UnitSphere);
            _camera.CenterPoint = new Vector3D(terrainTile.Resolution.X * 0.5, terrainTile.Resolution.Y * 0.5, 0.0);
            _sceneState.Camera.ZoomToTarget(tileRadius);
            _sceneState.Camera.Eye = new Vector3D(_xPos, 256, 0);
            
            //
            // Positions
            //
            IList<Vector3D> positions = new List<Vector3D>();
            double temp = 1.2 * _tile.HeightExaggeration;
            positions.Add(new Vector3D(0.0, 0.0, -temp));
            positions.Add(new Vector3D(0.0, 0.0, temp));
            positions.Add(new Vector3D(100.0, 100.0, -temp));
            positions.Add(new Vector3D(100.0, 100.0, temp));
            positions.Add(new Vector3D(200.0, 100.0, -temp));
            positions.Add(new Vector3D(200.0, 100.0, temp));
            positions.Add(new Vector3D(256.0, 256.0, -temp));
            positions.Add(new Vector3D(256.0, 256.0, temp));
            positions.Add(new Vector3D(512.0, 512.0, -temp));
            positions.Add(new Vector3D(512.0, 512.0, temp));

            //
            // junk 
            _polylineOnTerrain = new PolylineOnTerrain();
            _polylineOnTerrain.Set(_window.Context, positions);


            _clearState = new ClearState();

            // junk
            string fs =
                @"#version 330

                uniform sampler2D og_texture0;
                in vec2 fsTextureCoordinates;
                out vec4 fragmentColor;

                void main()
                {
                    if (texture(og_texture0, fsTextureCoordinates).r == 0.0)
                    {
                        fragmentColor = vec4(0.0, 0.0, 0.0, 1.0);
                    }
                    else
                    {
                        discard;
                    }
                }";

            _viewportQuad = new ViewportQuad(_window.Context, fs);
        }
Пример #9
0
        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;

            _framebuffer = context.CreateFramebuffer();

            _clearBlack = new ClearState();
            _clearBlack.Color = Color.Black;

            _clearWhite = new ClearState();
            _clearWhite.Color = Color.White;

            _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();
        }