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);
}
