public PointShapefile(
Shapefile shapefile,
Context context,
Ellipsoid globeShape,
ShapefileAppearance appearance)
{
Verify.ThrowIfNull(shapefile);
Verify.ThrowIfNull(context);
Verify.ThrowIfNull(globeShape);
Verify.ThrowIfNull(appearance);
_billboards = new BillboardCollection(context);
_billboards.Texture = Device.CreateTexture2D(appearance.Bitmap, TextureFormat.RedGreenBlueAlpha8, false);
foreach (Shape shape in shapefile)
{
if (shape.ShapeType != ShapeType.Point)
{
throw new NotSupportedException("The type of an individual shape does not match the Shapefile type.");
}
Vector2D point = ((PointShape)shape).Position;
Vector3D position = globeShape.ToVector3D(Trig.ToRadians(new Geodetic3D(point.X, point.Y)));
Billboard billboard = new Billboard();
billboard.Position = position;
_billboards.Add(billboard);
}
}
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);
}
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);
}
public LatitudeLongitudeGrid()
{
Ellipsoid globeShape = Ellipsoid.Wgs84;
_window = Device.CreateWindow(800, 600, "Chapter 4: Latitude Longitude Grid");
_window.Resize += OnResize;
_window.RenderFrame += OnRenderFrame;
_sceneState = new SceneState();
_camera = new CameraLookAtPoint(_sceneState.Camera, _window, globeShape);
_clearState = new ClearState();
_sceneState.Camera.PerspectiveNearPlaneDistance = 0.01 * globeShape.MaximumRadius;
_sceneState.Camera.PerspectiveFarPlaneDistance = 10.0 * globeShape.MaximumRadius;
_sceneState.Camera.ZoomToTarget(globeShape.MaximumRadius);
///////////////////////////////////////////////////////////////////
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)));
_globe = new LatitudeLongitudeGridGlobe(_window.Context);
_globe.Texture = Device.CreateTexture2D(new Bitmap("NE2_50M_SR_W_4096.jpg"), TextureFormat.RedGreenBlue8, false);
_globe.Shape = globeShape;
_globe.GridResolutions = new GridResolutionCollection(gridResolutions);
///////////////////////////////////////////////////////////////////
Vector3D vancouver = globeShape.ToVector3D(new Geodetic3D(Trig.ToRadians(-123.06), Trig.ToRadians(49.13), 0));
TextureAtlas atlas = new TextureAtlas(new Bitmap[]
{
new Bitmap("building.png"),
Device.CreateBitmapFromText("Vancouver", new Font("Arial", 24))
});
_vancouverLabel = new BillboardCollection(_window.Context);
_vancouverLabel.Texture = Device.CreateTexture2D(atlas.Bitmap, TextureFormat.RedGreenBlueAlpha8, false);
_vancouverLabel.DepthTestEnabled = false;
_vancouverLabel.Add(new Billboard()
{
Position = vancouver,
TextureCoordinates = atlas.TextureCoordinates[0]
});
_vancouverLabel.Add(new Billboard()
{
Position = vancouver,
TextureCoordinates = atlas.TextureCoordinates[1],
HorizontalOrigin = HorizontalOrigin.Left
});
atlas.Dispose();
}
public Curves()
{
_semiMinorAxis = Ellipsoid.ScaledWgs84.Radii.Z;
// 根据椭球对象的尺寸计算表面设定点的三维坐标
SetShape();
// 创建主窗口
_window = Device.CreateWindow(800, 600, "Chapter 2: Curves");
// 设置主窗口回调函数
_window.Resize += OnResize;
_window.RenderFrame += OnRenderFrame;
_window.Keyboard.KeyDown += OnKeyDown;
// 创建主场景OpenGL状态存储对象
_sceneState = new SceneState();
// 设置主场景照相机类型（固定观察一点的照相机）
_camera = new CameraLookAtPoint(_sceneState.Camera, _window, _globeShape);
// 创建状态（scissor/color/depth/stencil）清除对象
_clearState = new ClearState();
// 创建单色纹理对象（用于对椭球着色）
// 因为RayCastedGlobe对象的颜色只能通过其Texture接口设置
_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);
// 创建窗口表面的信息显示对象
_instructions = new HeadsUpDisplay();
// 设置信息显示前景色
_instructions.Color = Color.Black;
// 创建椭球表面采样点billboard显示集合对象
_sampledPoints = new BillboardCollection(_window.Context);
// 创建并设置billboard显示纹理为直径8个窗口像素的点
_sampledPoints.Texture = Device.CreateTexture2D(Device.CreateBitmapFromPoint(8), TextureFormat.RedGreenBlueAlpha8, false);
// 关闭采样点billboard集合显示对象的深度测试（使其在任何角度都可见）
_sampledPoints.DepthTestEnabled = false;
// 创建RayCastedGlobe椭球绘制对象并设置纹理
_ellipsoid = new RayCastedGlobe(_window.Context);
_ellipsoid.Texture = _texture;
// 创建椭球表面曲线显示对象
_polyline = new Polyline();
// 设置线宽并关闭深度测试
_polyline.Width = 3;
_polyline.DepthTestEnabled = false;
// 创建参考面显示对象
_plane = new Plane(_window.Context);
_plane.Origin = Vector3D.Zero;
_plane.OutlineWidth = 3;
// 创建主场景
CreateScene();
///////////////////////////////////////////////////////////////////
// 设置主照相机观察方向
_sceneState.Camera.Eye = Vector3D.UnitY;
// 根据视场重新调整相机位置
_sceneState.Camera.ZoomToTarget(2 * _globeShape.MaximumRadius);
}
public BillboardCollectionTest()
{
_window = Device.CreateWindow(1, 1);
_group = new BillboardCollection(_window.Context);
}
public LatitudeLongitudeGrid()
{
Ellipsoid globeShape = Ellipsoid.Wgs84;
_window = Device.CreateWindow(800, 600, "Chapter 4: Latitude Longitude Grid");
_window.Resize += OnResize;
_window.RenderFrame += OnRenderFrame;
_sceneState = new SceneState();
_camera = new CameraLookAtPoint(_sceneState.Camera, _window, globeShape);
_clearState = new ClearState();
_sceneState.Camera.PerspectiveNearPlaneDistance = 0.01 * globeShape.MaximumRadius;
_sceneState.Camera.PerspectiveFarPlaneDistance = 10.0 * globeShape.MaximumRadius;
_sceneState.Camera.ZoomToTarget(globeShape.MaximumRadius);
///////////////////////////////////////////////////////////////////
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)));
_globe = new LatitudeLongitudeGridGlobe(_window.Context);
_globe.Texture = Device.CreateTexture2D(new Bitmap("NE2_50M_SR_W_4096.jpg"), TextureFormat.RedGreenBlue8, false);
_globe.Shape = globeShape;
_globe.GridResolutions = new GridResolutionCollection(gridResolutions);
///////////////////////////////////////////////////////////////////
Vector3D vancouver = globeShape.ToVector3D(new Geodetic3D(Trig.ToRadians(-123.06), Trig.ToRadians(49.13), 0));
TextureAtlas atlas = new TextureAtlas(new Bitmap[]
{
new Bitmap("building.png"),
Device.CreateBitmapFromText("Vancouver", new Font("Arial", 24))
});
_vancouverLabel = new BillboardCollection(_window.Context);
_vancouverLabel.Texture = Device.CreateTexture2D(atlas.Bitmap, TextureFormat.RedGreenBlueAlpha8, false);
_vancouverLabel.DepthTestEnabled = false;
_vancouverLabel.Add(new Billboard()
{
Position = vancouver,
TextureCoordinates = atlas.TextureCoordinates[0]
});
_vancouverLabel.Add(new Billboard()
{
Position = vancouver,
TextureCoordinates = atlas.TextureCoordinates[1],
HorizontalOrigin = HorizontalOrigin.Left
});
atlas.Dispose();
}
private void CreateScene()
{
DisposeScene();
_ellipsoid = new TessellatedGlobe();
_ellipsoid.Shape = _globeShape;
_ellipsoid.NumberOfSlicePartitions = 64;
_ellipsoid.NumberOfStackPartitions = 32;
///////////////////////////////////////////////////////////////////
// 计算椭球网格
Mesh mesh = GeographicGridEllipsoidTessellator.Compute(_globeShape,
64, 32, GeographicGridEllipsoidVertexAttributes.Position);
// 创建椭球网格线框显示对象
_wireframe = new Wireframe(_window.Context, mesh);
_wireframe.Width = 2;
///////////////////////////////////////////////////////////////////
// 创建坐标轴显示对象
_axes = new Axes();
_axes.Length = 1.5;
_axes.Width = 3;
///////////////////////////////////////////////////////////////////
// 计算p点椭球表面坐标
Vector3D p = _globeShape.ToVector3D(new Geodetic3D(0, Trig.ToRadians(45), 0));
// 计算p点地理法线向量
Vector3D deticNormal = _globeShape.GeodeticSurfaceNormal(p);
// 计算p点地心法线向量
Vector3D centricNormal = Ellipsoid.CentricSurfaceNormal(p);
double normalLength = _globeShape.MaximumRadius;
// 计算地理法线末端点三维坐标
Vector3D pDetic = p + (normalLength * deticNormal);
Vector3D pCentric = p + (normalLength * centricNormal);
VertexAttributeFloatVector3 positionAttribute = new VertexAttributeFloatVector3("position", 4);
// 创建地理法线段顶点
positionAttribute.Values.Add(p.ToVector3F());
positionAttribute.Values.Add(pDetic.ToVector3F());
// 创建地心法线段顶点
positionAttribute.Values.Add(p.ToVector3F());
positionAttribute.Values.Add(pCentric.ToVector3F());
VertexAttributeRGBA colorAttribute = new VertexAttributeRGBA("color", 4);
// 创建地理法线段顶点颜色
colorAttribute.AddColor(Color.DarkGreen);
colorAttribute.AddColor(Color.DarkGreen);
// 创建地心法线段顶点颜色
colorAttribute.AddColor(Color.DarkCyan);
colorAttribute.AddColor(Color.DarkCyan);
// 创建地理/地心发现段图形显示元语
Mesh polyline = new Mesh();
polyline.PrimitiveType = PrimitiveType.Lines;
polyline.Attributes.Add(positionAttribute);
polyline.Attributes.Add(colorAttribute);
_normals = new Polyline();
_normals.Set(_window.Context, polyline);
_normals.Width = 3;
///////////////////////////////////////////////////////////////////
Font font = new Font("Arial", 24);
IList <Bitmap> labelBitmaps = new List <Bitmap>(2);
labelBitmaps.Add(Device.CreateBitmapFromText("Geodetic", font));
labelBitmaps.Add(Device.CreateBitmapFromText("Geocentric", font));
font.Dispose();
// 创建纹理压缩对象？
TextureAtlas atlas = new TextureAtlas(labelBitmaps);
_labels = new BillboardCollection(_window.Context, 2);
_labels.Texture = Device.CreateTexture2D(atlas.Bitmap, TextureFormat.RedGreenBlueAlpha8, false);
_labels.Add(new Billboard()
{
Position = pDetic,
// 取第一个纹理
TextureCoordinates = atlas.TextureCoordinates[0],
Color = Color.DarkGreen,
HorizontalOrigin = HorizontalOrigin.Right,
VerticalOrigin = VerticalOrigin.Bottom
});
_labels.Add(new Billboard()
{
Position = pCentric,
// 取第二个纹理
TextureCoordinates = atlas.TextureCoordinates[1],
Color = Color.DarkCyan,
HorizontalOrigin = HorizontalOrigin.Right,
VerticalOrigin = VerticalOrigin.Bottom
});
atlas.Dispose();
///////////////////////////////////////////////////////////////////
Vector3D east = Vector3D.UnitZ.Cross(deticNormal);
Vector3D north = deticNormal.Cross(east);
// 创建p点切平面
_tangentPlane = new Plane(_window.Context);
_tangentPlane.Origin = p;
_tangentPlane.XAxis = east;
_tangentPlane.YAxis = north;
_tangentPlane.OutlineWidth = 3;
}
private void CreateScene()
{
DisposeScene();
_ellipsoid = new TessellatedGlobe();
_ellipsoid.Shape = _globeShape;
_ellipsoid.NumberOfSlicePartitions = 64;
_ellipsoid.NumberOfStackPartitions = 32;
///////////////////////////////////////////////////////////////////
Mesh mesh = GeographicGridEllipsoidTessellator.Compute(_globeShape,
64, 32, GeographicGridEllipsoidVertexAttributes.Position);
_wireframe = new Wireframe(_window.Context, mesh);
_wireframe.Width = 2;
///////////////////////////////////////////////////////////////////
_axes = new Axes();
_axes.Length = 1.5;
_axes.Width = 3;
///////////////////////////////////////////////////////////////////
Vector3D p = _globeShape.ToVector3D(new Geodetic3D(0, Trig.ToRadians(45), 0));
Vector3D deticNormal = _globeShape.GeodeticSurfaceNormal(p);
Vector3D centricNormal = Ellipsoid.CentricSurfaceNormal(p);
double normalLength = _globeShape.MaximumRadius;
Vector3D pDetic = p + (normalLength * deticNormal);
Vector3D pCentric = p + (normalLength * centricNormal);
VertexAttributeFloatVector3 positionAttribute = new VertexAttributeFloatVector3("position", 4);
positionAttribute.Values.Add(p.ToVector3F());
positionAttribute.Values.Add(pDetic.ToVector3F());
positionAttribute.Values.Add(p.ToVector3F());
positionAttribute.Values.Add(pCentric.ToVector3F());
VertexAttributeRGBA colorAttribute = new VertexAttributeRGBA("color", 4);
colorAttribute.AddColor(Color.DarkGreen);
colorAttribute.AddColor(Color.DarkGreen);
colorAttribute.AddColor(Color.DarkCyan);
colorAttribute.AddColor(Color.DarkCyan);
Mesh polyline = new Mesh();
polyline.PrimitiveType = PrimitiveType.Lines;
polyline.Attributes.Add(positionAttribute);
polyline.Attributes.Add(colorAttribute);
_normals = new Polyline();
_normals.Set(_window.Context, polyline);
_normals.Width = 3;
///////////////////////////////////////////////////////////////////
Font font = new Font("Arial", 24);
IList<Bitmap> labelBitmaps = new List<Bitmap>(2);
labelBitmaps.Add(Device.CreateBitmapFromText("Geodetic", font));
labelBitmaps.Add(Device.CreateBitmapFromText("Geocentric", font));
font.Dispose();
TextureAtlas atlas = new TextureAtlas(labelBitmaps);
_labels = new BillboardCollection(_window.Context, 2);
_labels.Texture = Device.CreateTexture2D(atlas.Bitmap, TextureFormat.RedGreenBlueAlpha8, false);
_labels.Add(new Billboard()
{
Position = pDetic,
TextureCoordinates = atlas.TextureCoordinates[0],
Color = Color.DarkGreen,
HorizontalOrigin = HorizontalOrigin.Right,
VerticalOrigin = VerticalOrigin.Bottom
});
_labels.Add(new Billboard()
{
Position = pCentric,
TextureCoordinates = atlas.TextureCoordinates[1],
Color = Color.DarkCyan,
HorizontalOrigin = HorizontalOrigin.Right,
VerticalOrigin = VerticalOrigin.Bottom
});
atlas.Dispose();
///////////////////////////////////////////////////////////////////
Vector3D east = Vector3D.UnitZ.Cross(deticNormal);
Vector3D north = deticNormal.Cross(east);
_tangentPlane = new Plane(_window.Context);
_tangentPlane.Origin = p;
_tangentPlane.XAxis = east;
_tangentPlane.YAxis = north;
_tangentPlane.OutlineWidth = 3;
}
