public TerrainShading()
{
_window = Device.CreateWindow(800, 600, "Chapter 11: Terrain Shading");
_window.Resize += OnResize;
_window.RenderFrame += OnRenderFrame;
_window.Keyboard.KeyDown += OnKeyDown;
_window.Keyboard.KeyUp += OnKeyUp;
_sceneState = new SceneState();
_sceneState.Camera.PerspectiveFarPlaneDistance = 4096;
_sceneState.DiffuseIntensity = 0.9f;
_sceneState.SpecularIntensity = 0.05f;
_sceneState.AmbientIntensity = 0.05f;
_clearState = new ClearState();
///////////////////////////////////////////////////////////////////
TerrainTile terrainTile = TerrainTile.FromBitmap(new Bitmap("ps-e.lg.png"));
_tile = new VertexDisplacementMapTerrainTile(_window.Context, terrainTile);
_tile.HeightExaggeration = 30;
_tile.ColorMapTexture = Device.CreateTexture2D(new Bitmap("ps_texture_1k.png"), TextureFormat.RedGreenBlue8, false);
_tile.ColorRampHeightTexture = Device.CreateTexture2D(new Bitmap("ColorRamp.jpg"), TextureFormat.RedGreenBlue8, false);
_tile.ColorRampSlopeTexture = Device.CreateTexture2D(new Bitmap("ColorRampSlope.jpg"), TextureFormat.RedGreenBlue8, false);
_tile.BlendRampTexture = Device.CreateTexture2D(new Bitmap("BlendRamp.jpg"), TextureFormat.Red8, false);
_tile.GrassTexture = Device.CreateTexture2D(new Bitmap("Grass.jpg"), TextureFormat.RedGreenBlue8, false);
_tile.StoneTexture = Device.CreateTexture2D(new Bitmap("Stone.jpg"), TextureFormat.RedGreenBlue8, false);
_tile.BlendMaskTexture = Device.CreateTexture2D(new Bitmap("BlendMask.jpg"), TextureFormat.Red8, false);
///////////////////////////////////////////////////////////////////
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 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();
///////////////////////////////////////////////////////////////////
// 创建地形高程对象
TerrainTile terrainTile = TerrainTile.FromBitmap(new Bitmap(@"ps-e.lg.png"));
// 创建地形图形可渲染对象
_tile = new RayCastedTerrainTile(terrainTile);
// 地形高度缩放因子（可以使高山更高）
_tile.HeightExaggeration = 30;
///////////////////////////////////////////////////////////////////
// 根据地形设置相机位置
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 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);
}