public void ResetRotation()
{
ScientificCamera camera = this.Camera;
if (camera == null) { return; }
ScientificCamera originalCamera = this.originalCamera;
if (originalCamera == null) { return; }
camera.Position = originalCamera.Position;
camera.UpVector = originalCamera.UpVector;
}
public void MouseMove(int x, int y)
{
if (this.mouseDownFlag)
{
ScientificCamera camera = this.Camera;
if (camera == null) { return; }
Vertex back = this.back;
Vertex right = this.right;
Vertex up = this.up;
Size bound = this.bound;
Point downPosition = this.downPosition;
{
float deltaX = -horizontalRotationFactor * (x - downPosition.X) / bound.Width;
float cos = (float)Math.Cos(deltaX);
float sin = (float)Math.Sin(deltaX);
Vertex newBack = new Vertex(
back.X * cos + right.X * sin,
back.Y * cos + right.Y * sin,
back.Z * cos + right.Z * sin);
back = newBack;
right = up.VectorProduct(back);
back.Normalize();
right.Normalize();
}
{
float deltaY = verticalRotationFactor * (y - downPosition.Y) / bound.Height;
float cos = (float)Math.Cos(deltaY);
float sin = (float)Math.Sin(deltaY);
Vertex newBack = new Vertex(
back.X * cos + up.X * sin,
back.Y * cos + up.Y * sin,
back.Z * cos + up.Z * sin);
back = newBack;
up = back.VectorProduct(right);
back.Normalize();
up.Normalize();
}
camera.Position = camera.Target +
back * (float)((camera.Position - camera.Target).Magnitude());
camera.UpVector = up;
this.back = back;
this.right = right;
this.up = up;
this.downPosition.X = x;
this.downPosition.Y = y;
}
}
/// <summary>
/// Handles the Resized event of the openGLControl control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
private void openGLControl_Resized(object sender, EventArgs e)
{
// TODO: Set the projection matrix here.
ScientificCamera camera = this.camera;
camera.AspectRatio = (double)Width / (double)Height;
camera.Far = 100;
camera.Near = 0.01;
camera.FieldOfView = 60;
// Get the OpenGL object.
OpenGL gl = openGLControl.OpenGL;
camera.Project(gl);
}
/// <summary>
/// Initializes a new instance of the <see cref="SharpGLForm"/> class.
/// </summary>
public SharpGLForm()
{
InitializeComponent();
ScientificCamera camera = this.camera;
this.satelliteRotation.Camera = camera;
camera.Position = new SharpGL.SceneGraph.Vertex(-2, 2, -2);
camera.Target = new SharpGL.SceneGraph.Vertex();
camera.UpVector = new SharpGL.SceneGraph.Vertex(0, 1, 0);
this.openGLControl_Resized(this.openGLControl, EventArgs.Empty);
this.openGLControl.MouseDown += openGLControl_MouseDown;
this.openGLControl.MouseMove += openGLControl_MouseMove;
this.openGLControl.MouseUp += openGLControl_MouseUp;
this.openGLControl.MouseWheel += openGLControl_MouseWheel;
this.openGLControl.KeyDown += openGLControl_KeyDown;
}
public void Scale(int delta)
{
ScientificCamera camera = this;
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.
camera.Far += lengthDiff;
//camera.Near += lengthDiff;
}
private void PrepareCamera()
{
var camera = this.Camera;
if (camera != null)
{
Vertex back = camera.Position - camera.Target;
Vertex right = Camera.UpVector.VectorProduct(back);
Vertex up = back.VectorProduct(right);
back.Normalize();
right.Normalize();
up.Normalize();
this.back = back;
this.right = right;
this.up = up;
if (this.originalCamera == null)
{ this.originalCamera = new ScientificCamera(); }
this.originalCamera.Position = camera.Position;
this.originalCamera.UpVector = camera.UpVector;
}
}
/// <summary>
/// Rotates a camera on a sphere, whose center is camera's Target.
/// <para>Just like a satellite moves around a fixed star.</para>
/// </summary>
/// <param name="camera"></param>
public SatelliteRotation(ScientificCamera camera = null)
{
this.Camera = camera;
}
