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(); }
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); }