private void CameraResized()
{
OpenGL gl = sceneControl.OpenGL;
var h = this.sceneControl.Height;
var w = this.sceneControl.Width;
if (h == 0)
{
h = 1;
}
{
IPerspectiveCamera camera = this.camera;
camera.AspectRatio = (double)w / (double)h;
}
{
IOrthoCamera camera = this.camera;
if (w < h)
{
camera.Bottom = camera.Left * h / w;
camera.Top = camera.Right * h / w;
}
else
{
camera.Left = camera.Bottom * w / h;
camera.Right = camera.Top * w / h;
}
}
gl.Viewport(0, 0, w, h);
this.camera.Project(gl);
}
///// <summary>
///// 默认目标为vec3(0, 0, -1)
///// </summary>
//public static readonly vec3 defaultTarget = new vec3(0, 0, -1);
///// <summary>
///// 默认位置为vec3(0, 0, 0)
///// </summary>
//public static readonly vec3 defaultPosition = new vec3(0, 0, 0);
///// <summary>
///// 默认上方为vec3(0, 1, 0)
///// </summary>
//public static readonly vec3 defaultUpVector = new vec3(0, 1, 0);
/// <summary>
/// Camera.
/// </summary>
/// <param name="position">position in world space</param>
/// <param name="target">target in world space.</param>
/// <param name="up">up in world space.</param>
/// <param name="cameraType">perspective or ortho?</param>
/// <param name="width">canvas' width.</param>
/// <param name="height">canvas' height.</param>
public Camera(vec3 position, vec3 target, vec3 up, CameraType cameraType, double width, double height)
{
this.Position = position;
this.Target = target;
this.UpVector = up;
IPerspectiveCamera perspectiveCamera = this;
perspectiveCamera.FieldOfView = 60.0f;
perspectiveCamera.AspectRatio = width / height;
perspectiveCamera.Near = 0.1;
perspectiveCamera.Far = 10000;
const int factor = 100;
IOrthoCamera orthoCamera = this;
orthoCamera.Left = -width / 2 / factor;
orthoCamera.Right = width / 2 / factor;
orthoCamera.Bottom = -height / 2 / factor;
orthoCamera.Top = height / 2 / factor;
orthoCamera.Near = -10000;
orthoCamera.Far = 10000;
this.CameraType = cameraType;
}
/// <summary>
/// Apply specifed viewType to camera according to bounding box's size and position.
/// <para> +-------+ </para>
/// <para> /| /| </para>
/// <para> +-------+ | </para>
/// <para> | | | | </para>
/// <para> | O-----|-+---X</para>
/// <para> |/ |/ </para>
/// <para> +-------+ </para>
/// <para> / | </para>
/// <para>Y Z </para>
/// <para>其边长为(2 * Math.Sqrt(3)), 所在的坐标系如下</para>
/// <para> O---X</para>
/// <para> /| </para>
/// <para> Y | </para>
/// <para> Z </para>
/// </summary>
/// <param name="camera"></param>
/// <param name="boundingBox"></param>
/// <param name="viewType"></param>
public static void ApplyViewType(this IPerspectiveViewCamera camera, IBoundingBox boundingBox,
ViewTypes viewType)
{
vec3 length = boundingBox.MaxPosition - boundingBox.MinPosition;
float size = Math.Max(Math.Max(length.x, length.y), length.z);
{
vec3 target = boundingBox.MaxPosition / 2 + boundingBox.MinPosition / 2;
vec3 target2Position;
vec3 upVector;
GetBackAndUp(out target2Position, out upVector, viewType);
vec3 position = target + target2Position * (size * 2 + 1);
camera.Position = position;
camera.Target = target;
camera.UpVector = upVector;
}
{
int[] viewport = new int[4];
OpenGL.GetInteger(GetTarget.Viewport, viewport);
int width = viewport[2]; int height = viewport[3];
IPerspectiveCamera perspectiveCamera = camera;
perspectiveCamera.FieldOfView = 60;
perspectiveCamera.AspectRatio = (double)width / (double)height;
perspectiveCamera.Near = 0.01;
perspectiveCamera.Far = size * 3 + 1;// double.MaxValue;
}
}
public FormFontElement()
{
InitializeComponent();
//if (CameraDictionary.Instance.ContainsKey(this.GetType().Name))
//{
// this.camera = CameraDictionary.Instance[this.GetType().Name];
//}
//else
{
this.camera = new ScientificCamera(CameraTypes.Perspecitive, this.glCanvas1.Width, this.glCanvas1.Height);
//CameraDictionary.Instance.Add(this.GetType().Name, this.camera);
}
IPerspectiveCamera perspectiveCamera = this.camera;
perspectiveCamera.FieldOfView = 60f;
perspectiveCamera.AspectRatio = (double)this.glCanvas1.Width / (double)this.glCanvas1.Height;
perspectiveCamera.Near = 0.01;
perspectiveCamera.Far = 10000;
IOrthoCamera orthoCamera = this.camera;
orthoCamera.Left = -this.glCanvas1.Width / 2;
orthoCamera.Right = this.glCanvas1.Width / 2;
orthoCamera.Bottom = -this.glCanvas1.Height / 2;
orthoCamera.Top = this.glCanvas1.Height / 2;
orthoCamera.Near = -10000;
orthoCamera.Far = 10000;
this.camera.Position = new vec3(0, 0, 9.23f);
satelliteRoration = new SatelliteRotator(camera);
//element = new ModernSingleTextureFont("simsun.ttf", 48, '祝', '神');//char.MinValue, char.MaxValue);
//element = new FontElement("simsun.ttf", 48, '一', '龟');//包含了几乎所有汉字字符
element = new FontElement("simsun.ttf", 48, (char)0, '~');
element.Initialize();
//element.SetText("祝神");
//element.SetText("一龟");
element.SetText("The quick brown fox jumps over the lazy dog!");
element.BeforeRendering += element_BeforeRendering;
element.AfterRendering += element_AfterRendering;
uiAxisElement = new SimpleUIAxis(
new IUILayoutParam(AnchorStyles.Left | AnchorStyles.Bottom,
new Padding(0, 0, 0, 0), new System.Drawing.Size(100, 100)));
uiAxisElement.Initialize();
this.glCanvas1.MouseWheel += glCanvas1_MouseWheel;
this.glCanvas1.KeyPress += glCanvas1_KeyPress;
this.glCanvas1.MouseDown += glCanvas1_MouseDown;
this.glCanvas1.MouseMove += glCanvas1_MouseMove;
this.glCanvas1.MouseUp += glCanvas1_MouseUp;
this.glCanvas1.OpenGLDraw += glCanvas1_OpenGLDraw;
this.glCanvas1.Resize += glCanvas1_Resize;
}
/// <summary>
/// Extension method for <see cref="IPerspectiveCamera"/> to get projection matrix.
/// </summary>
/// <param name="camera"></param>
/// <returns></returns>
public static mat4 GetProjectionMat4(this IPerspectiveCamera camera)
{
GlmNet.mat4 perspective = GlmNet.glm.perspective(
(float)(camera.FieldOfView / 360.0 * Math.PI * 2),
(float)camera.AspectRatio, (float)camera.Near, (float)camera.Far);
return(perspective);
}
/// <summary>
/// 摄像机。
/// </summary>
/// <param name="cameraType">类型</param>
/// <param name="width">OpenGL窗口的宽度</param>
/// <param name="height">OpenGL窗口的高度</param>
public Camera(CameraType cameraType, double width, double height)
{
this.lastWidth = width;
this.lastHeight = height;
IPerspectiveCamera perspectiveCamera = this;
perspectiveCamera.FieldOfView = 60.0f;
perspectiveCamera.AspectRatio = width / height;
perspectiveCamera.Near = 0.1;
perspectiveCamera.Far = 1000;
const int factor = 100;
IOrthoCamera orthoCamera = this;
orthoCamera.Left = -width / 2 / factor;
orthoCamera.Right = width / 2 / factor;
orthoCamera.Bottom = -height / 2 / factor;
orthoCamera.Top = height / 2 / factor;
orthoCamera.Near = -1000;
orthoCamera.Far = 1000;
this.Target = defaultTarget;
this.Position = defaultPosition;
this.UpVector = defaultUpVector;
this.CameraType = cameraType;
}
public ScientificCamera(CameraTypes cameraType = CameraTypes.Perspecitive)
{
Name = "Scientific Camera: " + count++;
IPerspectiveCamera perspectiveCamera = this;
perspectiveCamera.FieldOfView = 60f;
perspectiveCamera.AspectRatio = 1f;
perspectiveCamera.Near = 0.01;
perspectiveCamera.Far = 1000;
IOrthoCamera orthoCamera = this;
orthoCamera.Left = -100;
orthoCamera.Right = 100;
orthoCamera.Bottom = -100;
orthoCamera.Top = 100;
orthoCamera.Near = -1000;
orthoCamera.Far = 1000;
this.Target = new Vertex(0, 0, 0);
this.UpVector = new Vertex(0, 1, 0);
this.Position = new Vertex(0, 0, 1);
this.CameraType = cameraType;
}
/// <summary>
/// 实施传统方式的投影
/// </summary>
/// <param name="camera"></param>
public static void LegacyGLProjection(this ICamera camera)
{
// Load the projection identity matrix.
GL.MatrixMode(GL.GL_PROJECTION);
GL.LoadIdentity();
// Perform the projection.
switch (camera.CameraType)
{
case CameraType.Perspecitive:
IPerspectiveCamera perspectiveCamera = camera;
GL.gluPerspective(perspectiveCamera.FieldOfView, perspectiveCamera.AspectRatio, perspectiveCamera.Near, perspectiveCamera.Far);
break;
case CameraType.Ortho:
IOrthoCamera orthoCamera = camera;
GL.Ortho(orthoCamera.Left, orthoCamera.Right, orthoCamera.Bottom, orthoCamera.Top, orthoCamera.Near, orthoCamera.Far);
break;
default:
break;
}
// Perform the look at transformation.
GL.gluLookAt((double)camera.Position.x, (double)camera.Position.y, (double)camera.Position.z,
(double)camera.Target.x, (double)camera.Target.y, (double)camera.Target.z,
(double)camera.UpVector.x, (double)camera.UpVector.y, (double)camera.UpVector.z);
// Back to the modelview matrix.
GL.MatrixMode(GL.GL_MODELVIEW);
}
/// <summary>
/// Extension method for <see cref="IPerspectiveCamera"/> to get projection matrix.
/// </summary>
/// <param name="camera"></param>
/// <returns></returns>
public static mat4 GetProjectionMat4(this IPerspectiveCamera camera)
{
mat4 perspective = glm.perspective(
(float)(camera.FieldOfView * Math.PI / 180.0f),
(float)camera.AspectRatio, (float)camera.Near, (float)camera.Far);
return(perspective);
}
/// <summary>
/// opengl控件的大小改变时调整camera.
/// Adjust camera when OpenGL canvas's size changed.
/// </summary>
/// <param name="camera"></param>
/// <param name="lastSize">canvas' last size.</param>
/// <param name="currentSize">canvas' current size.</param>
public static void Resize(this ICamera camera, Size lastSize, Size currentSize)
{
IPerspectiveCamera perspectiveCamera = camera;
double lastAspectRatio = perspectiveCamera.AspectRatio;
// update perspective camera.
{
perspectiveCamera.AspectRatio = ((double)currentSize.Width) / ((double)currentSize.Height);
}
// update ortho camera.
{
IOrthoCamera orthoCamera = camera;
if (lastSize.Width != currentSize.Width)
{
double lastWidth = orthoCamera.Right - orthoCamera.Left;
double widthRatio = ((double)currentSize.Width) / ((double)lastSize.Width);
double currentWidth = lastWidth * widthRatio;
orthoCamera.Left = -currentWidth / 2.0;
orthoCamera.Right = currentWidth / 2.0;
}
if (lastSize.Height != currentSize.Height)
{
double lastHeight = orthoCamera.Top - orthoCamera.Bottom;
double heightRatio = ((double)currentSize.Height) / ((double)lastSize.Height);
double currentHeight = lastHeight * heightRatio;
orthoCamera.Bottom = -currentHeight / 2.0;
orthoCamera.Top = currentHeight / 2.0;
}
//if (aspectRatio > lastAspectRatio)
//{
// double top = orthoCamera.Top;
// double newRight = top * aspectRatio;
// orthoCamera.Left = -newRight;
// orthoCamera.Right = newRight;
//}
//else if (aspectRatio < lastAspectRatio)
//{
// double right = orthoCamera.Right;
// double newTop = right / aspectRatio;
// orthoCamera.Bottom = -newTop;
// orthoCamera.Top = newTop;
//}
//const int factor = 100;
//if (width / 2 / factor != orthoCamera.Right)
//{
// orthoCamera.Left = -width / 2 / factor;
// orthoCamera.Right = width / 2 / factor;
//}
//if (height / 2 / factor != orthoCamera.Top)
//{
// orthoCamera.Bottom = -height / 2 / factor;
// orthoCamera.Top = height / 2 / factor;
//}
}
}
/// <summary>
/// opengl控件的大小改变时调整camera.
/// Adjust camera when OpenGL canvas's size changed.
/// </summary>
/// <param name="camera"></param>
/// <param name="lastSize">canvas' last size.</param>
/// <param name="currentSize">canvas' current size.</param>
public static void Resize(this ICamera camera, Size lastSize, Size currentSize)
{
// update perspective camera.
{
IPerspectiveCamera perspectiveCamera = camera;
perspectiveCamera.AspectRatio = ((double)currentSize.Width) / ((double)currentSize.Height);
}
// update ortho camera.
{
IOrthoCamera orthoCamera = camera;
// fit window size.
if (lastSize.Width != currentSize.Width)
{
double lastWidth = orthoCamera.Right - orthoCamera.Left;
double widthRatio = ((double)currentSize.Width) / ((double)lastSize.Width);
double currentWidth = lastWidth * widthRatio;
double center = (orthoCamera.Left + orthoCamera.Right) / 2.0 * widthRatio;
orthoCamera.Left = center - currentWidth / 2.0;
orthoCamera.Right = center + currentWidth / 2.0;
}
// fit window size.
if (lastSize.Height != currentSize.Height)
{
double lastHeight = orthoCamera.Top - orthoCamera.Bottom;
double heightRatio = ((double)currentSize.Height) / ((double)lastSize.Height);
double currentHeight = lastHeight * heightRatio;
double center = (orthoCamera.Bottom + orthoCamera.Top) / 2.0 * heightRatio;
orthoCamera.Bottom = center - currentHeight / 2.0;
orthoCamera.Top = center + currentHeight / 2.0;
}
//// scale scene.
//if (currentSize.Width >= currentSize.Height)
//{
// double ratio1 = (double)currentSize.Width / (double)lastSize.Width;
// double ratio2 = (double)lastSize.Height / (double)currentSize.Height;
// double currentWidth = orthoCamera.Right - orthoCamera.Left;
// double center = (orthoCamera.Right + orthoCamera.Left) / 2.0;
// double newWidth = currentWidth * ratio1 * ratio2;
// orthoCamera.Left = center - newWidth / 2;
// orthoCamera.Right = center + newWidth / 2;
//}
//else
//{
// double ratio1 = (double)currentSize.Height / (double)lastSize.Height;
// double ratio2 = (double)lastSize.Width / (double)currentSize.Width;
// double currentHeight = orthoCamera.Top - orthoCamera.Bottom;
// double center = (orthoCamera.Top + orthoCamera.Bottom) / 2;
// double newHeight = currentHeight * ratio1 * ratio2;
// orthoCamera.Bottom = center - newHeight / 2;
// orthoCamera.Top = center + newHeight / 2;
//}
}
}
public void CopyFrom(IPerspectiveCamera fromCamera)
{
this._position = fromCamera.Position;
this._lookAt = fromCamera.LookAt;
this._up = fromCamera.Up;
this._nearPlane = fromCamera.NearPlane;
this._farPlane = fromCamera.FarPlane;
this._fieldOfView = fromCamera.FieldOfView;
this._aspectRatio = fromCamera.AspectRatio;
UpdateView();
UpdateProjection();
}
/// <summary>
/// Initialises the scene.
/// </summary>
/// <param name="gl">The OpenGL instance.</param>
/// <param name="width">The width of the screen.</param>
/// <param name="height">The height of the screen.</param>
public void Initialise(OpenGL gl, float width, float height)
{
// Set a blue clear colour.
gl.ClearColor(0.4f, 0.6f, 0.9f, 0.5f);
{
// Create the shader program.
var vertexShaderSource = ManifestResourceLoader.LoadTextFile("Shader.vert");
var fragmentShaderSource = ManifestResourceLoader.LoadTextFile("Shader.frag");
var shaderProgram = new ShaderProgram();
shaderProgram.Create(gl, vertexShaderSource, fragmentShaderSource, null);
shaderProgram.BindAttributeLocation(gl, attributeIndexPosition, "in_Position");
shaderProgram.BindAttributeLocation(gl, attributeIndexColour, "in_Color");
shaderProgram.AssertValid(gl);
this.shaderProgram = shaderProgram;
}
{
// Create the shader program.
var vertexShaderSource = ColorCodedPickingShaderHelper.GetShaderSource(ColorCodedPickingShaderHelper.ShaderTypes.VertexShader);
var fragmentShaderSource = ColorCodedPickingShaderHelper.GetShaderSource(ColorCodedPickingShaderHelper.ShaderTypes.FragmentShader);
var shaderProgram = new ShaderProgram();
shaderProgram.Create(gl, vertexShaderSource, fragmentShaderSource, null);
shaderProgram.BindAttributeLocation(gl, attributeIndexPosition, "in_Position");
shaderProgram.BindAttributeLocation(gl, attributeIndexColour, "in_Color");
shaderProgram.AssertValid(gl);
this.pickingShaderProgram = shaderProgram;
}
// Create a perspective projection matrix.
const float rads = (60.0f / 360.0f) * (float)Math.PI * 2.0f;
projectionMatrix = glm.perspective(rads, width / height, 0.1f, 100.0f);
// Create a view matrix to move us back a bit.
viewMatrix = glm.translate(new mat4(1.0f), new vec3(0.0f, 0.0f, -5.0f));
// Create a model matrix to make the model a little bigger.
modelMatrix = glm.scale(new mat4(1.0f), new vec3(2.5f));
IPerspectiveCamera camera = this.cameraRotation.Camera;
projectionMatrix = camera.GetProjectionMat4();
viewMatrix = this.cameraRotation.Camera.GetViewMat4();
modelMatrix = mat4.identity();
// Now create the geometry for the square.
CreateVertices(gl);
}
/// <summary>
/// Draws the scene.
/// </summary>
/// <param name="gl">The OpenGL instance.</param>
public void Draw(OpenGL gl, RenderMode renderMode = RenderMode.Render)
{
var shader = (renderMode == RenderMode.HitTest) ? pickingShaderProgram : shaderProgram;
if (renderMode == RenderMode.HitTest)
{
gl.ClearColor(1, 1, 1, 1);
}
else
{
// Set a blue clear colour.
gl.ClearColor(0.4f, 0.6f, 0.9f, 0.5f);
}
// Clear the scene.
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT | OpenGL.GL_STENCIL_BUFFER_BIT);
gl.PointSize(3);
// Update matrices.
IPerspectiveCamera camera = this.cameraRotation.Camera;
projectionMatrix = camera.GetProjectionMat4();
viewMatrix = this.cameraRotation.Camera.GetViewMat4();
modelMatrix = mat4.identity();
// Bind the shader, set the matrices.
shader.Bind(gl);
shader.SetUniformMatrix4(gl, "projectionMatrix", projectionMatrix.to_array());
shader.SetUniformMatrix4(gl, "viewMatrix", viewMatrix.to_array());
shader.SetUniformMatrix4(gl, "modelMatrix", modelMatrix.to_array());
// Bind the out vertex array.
vertexBufferArray.Bind(gl);
// Draw the square.
//gl.DrawArrays(OpenGL.GL_TRIANGLES, 0, vertices.Length);
gl.DrawArrays(OpenGL.GL_POINTS, 0, vertices.Length);
// Unbind our vertex array and shader.
vertexBufferArray.Unbind(gl);
shader.Unbind(gl);
gl.Flush();
}
// TODO: This is not a good implemtation. rewrite it!
/// <summary>
/// 对摄像机执行一次缩放操作
/// </summary>
/// <param name="camera"></param>
/// <param name="delta"></param>
public static void MouseWheel(this ICamera camera, int delta)
{
//if (camera.CameraType == CameraTypes.Perspecitive)
{
var target2Position = (camera.Position - camera.Target);
if (target2Position.length() < 0.01)
{
target2Position = target2Position.normalize();
target2Position.x *= 0.01f;
target2Position.y *= 0.01f;
target2Position.z *= 0.01f;
}
var scaledTarget2Position = target2Position * (1 - delta * 0.001f);
camera.Position = camera.Target + scaledTarget2Position;
double lengthDiff = scaledTarget2Position.length() - target2Position.length();
// Increase ortho camera's Near/Far property in case the camera's position changes too much.
IPerspectiveCamera perspectiveCamera = camera;
perspectiveCamera.Far += lengthDiff;
//perspectiveCamera.Near += lengthDiff;
IOrthoCamera orthoCamera = camera;
orthoCamera.Far += lengthDiff;
orthoCamera.Near += lengthDiff;
System.Console.WriteLine("camera pos:({0},{1},{2}) target:({3},{4},{5})",
camera.Position.x, camera.Position.y, camera.Position.z,
camera.Target.x, camera.Target.y, camera.Target.z);
}
//else if (camera.CameraType == CameraTypes.Ortho)
{
IOrthoCamera orthoCamera = camera;
double distanceX = orthoCamera.Right - orthoCamera.Left;
double distanceY = orthoCamera.Top - orthoCamera.Bottom;
double centerX = (orthoCamera.Left + orthoCamera.Right) / 2;
double centerY = (orthoCamera.Bottom + orthoCamera.Top) / 2;
orthoCamera.Left = centerX - distanceX * (1 - delta * 0.001) / 2;
orthoCamera.Right = centerX + distanceX * (1 - delta * 0.001) / 2;
orthoCamera.Bottom = centerY - distanceY * (1 - delta * 0.001) / 2;
orthoCamera.Top = centerX + distanceY * (1 - delta * 0.001) / 2;
}
}
/// <summary>
/// opengl控件的大小改变时调整camera
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
public void Resize(double width, double height)
{
double aspectRatio = width / height;
IPerspectiveCamera perspectiveCamera = this;
perspectiveCamera.AspectRatio = aspectRatio;
IOrthoCamera orthoCamera = this;
double lastAspectRatio = this.lastWidth / this.lastHeight;
if (aspectRatio > lastAspectRatio)
{
double top = orthoCamera.Top;
double newRight = top * aspectRatio;
orthoCamera.Left = -newRight;
orthoCamera.Right = newRight;
}
else if (aspectRatio < lastAspectRatio)
{
double right = orthoCamera.Right;
double newTop = right / aspectRatio;
orthoCamera.Bottom = -newTop;
orthoCamera.Top = newTop;
}
//const int factor = 100;
//if (width / 2 / factor != orthoCamera.Right)
//{
// orthoCamera.Left = -width / 2 / factor;
// orthoCamera.Right = width / 2 / factor;
//}
//if (height / 2 / factor != orthoCamera.Top)
//{
// orthoCamera.Bottom = -height / 2 / factor;
// orthoCamera.Top = height / 2 / factor;
//}
}
/// <summary>
/// This is the class' main function, to override this function and perform a
/// perspective transformation.
/// </summary>
public override void TransformProjectionMatrix(OpenGL gl)
{
// Perform the look at transformation.
switch (CameraType)
{
case CameraTypes.Perspecitive:
IPerspectiveCamera perspectiveCamera = this;
gl.Perspective(perspectiveCamera.FieldOfView, perspectiveCamera.AspectRatio, perspectiveCamera.Near, perspectiveCamera.Far);
break;
case CameraTypes.Ortho:
IOrthoCamera orthoCamera = this;
gl.Ortho(orthoCamera.Left, orthoCamera.Right, orthoCamera.Bottom, orthoCamera.Top, orthoCamera.Near, orthoCamera.Far);
break;
default:
break;
}
gl.LookAt((double)Position.X, (double)Position.Y, (double)Position.Z,
(double)Target.X, (double)Target.Y, (double)Target.Z,
(double)UpVector.X, (double)UpVector.Y, (double)UpVector.Z);
}
public void Scale(int delta)
{
ScientificCamera camera = this;
//if (camera.CameraType == CameraTypes.Perspecitive)
{
var target2Position = camera.Position - camera.Target;
if (target2Position.Magnitude() < 0.01)
{
target2Position.Normalize();
target2Position.X *= 0.01f;
target2Position.Y *= 0.01f;
target2Position.Z *= 0.01f;
}
var scaledTarget2Position = target2Position * (1 - delta * 0.001f);
camera.Position = camera.Target + scaledTarget2Position;
double lengthDiff = scaledTarget2Position.Magnitude() - target2Position.Magnitude();
// Increase ortho camera's Near/Far property in case the camera's position changes too much.
IPerspectiveCamera perspectiveCamera = camera;
perspectiveCamera.Far += lengthDiff;
//perspectiveCamera.Near += lengthDiff;
IOrthoCamera orthoCamera = camera;
orthoCamera.Far += lengthDiff;
orthoCamera.Near += lengthDiff;
}
//else if (camera.CameraType == CameraTypes.Ortho)
{
IOrthoCamera orthoCamera = camera;
double distanceX = orthoCamera.Right - orthoCamera.Left;
double distanceY = orthoCamera.Top - orthoCamera.Bottom;
double centerX = (orthoCamera.Left + orthoCamera.Right) / 2;
double centerY = (orthoCamera.Bottom + orthoCamera.Top) / 2;
orthoCamera.Left = centerX - distanceX * (1 - delta * 0.001) / 2;
orthoCamera.Right = centerX + distanceX * (1 - delta * 0.001) / 2;
orthoCamera.Bottom = centerY - distanceY * (1 - delta * 0.001) / 2;
orthoCamera.Top = centerX + distanceY * (1 - delta * 0.001) / 2;
}
}
/// <summary>
/// Apply specifed viewType to camera according to bounding box's size and position.
/// <para> +-------+ </para>
/// <para> /| /| </para>
/// <para> +-------+ | </para>
/// <para> | | | | </para>
/// <para> | O-----|-+---X</para>
/// <para> |/ |/ </para>
/// <para> +-------+ </para>
/// <para> / | </para>
/// <para>Y Z </para>
/// <para>其边长为(2 * Math.Sqrt(3)), 所在的坐标系如下</para>
/// <para> O---X</para>
/// <para> /| </para>
/// <para> Y | </para>
/// <para> Z </para>
/// </summary>
/// <param name="camera"></param>
/// <param name="boundingBox"></param>
/// <param name="openGL"></param>
/// <param name="viewType"></param>
public static void ApplyViewType(this IPerspectiveViewCamera camera, IBoundingBox boundingBox,
OpenGL openGL, ViewTypes viewType, CoordinateSystem coordinateSystem)
{
float sizeX, sizeY, sizeZ;
boundingBox.GetBoundDimensions(out sizeX, out sizeY, out sizeZ);
float size = Math.Max(Math.Max(sizeX, sizeY), sizeZ);
{
float centerX, centerY, centerZ;
boundingBox.GetCenter(out centerX, out centerY, out centerZ);
Vertex target = new Vertex(centerX, centerY, centerZ);
Vertex target2Position;
Vertex upVector;
GetBackAndUp(out target2Position, out upVector, viewType, coordinateSystem);
Vertex position = target + target2Position * (size * 2 + 1);
camera.Position = position;
camera.Target = target;
camera.UpVector = upVector;
}
{
int[] viewport = new int[4];
openGL.GetInteger(SharpGL.Enumerations.GetTarget.Viewport, viewport);
int width = viewport[2]; int height = viewport[3];
IPerspectiveCamera perspectiveCamera = camera;
perspectiveCamera.FieldOfView = 60;
perspectiveCamera.AspectRatio = (double)width / (double)height;
perspectiveCamera.Near = 0.01;
perspectiveCamera.Far = size * 3 + 1;// double.MaxValue;
}
}