/// <summary>
/// Initializes a new instance of the <see cref="OrbitCameraAligned"/> class.
/// </summary>
/// <param name="view">The view from which to retrieve input and aspect ratio.</param>
/// <param name="rotationSpeedBase">The base (i.e. at default zoom distance) rotation speed of the camera, in radians per per update.</param>
/// <param name="fieldOfViewRadians">The camera's field of view, in radians.</param>
/// <param name="nearPlaneDistance">The distance of the near plane from the camera.</param>
/// <param name="farPlaneDistance">The ditance of the far plane from the camera.</param>
public OrbitCameraAligned(
MyOTKEWindow view,
float rotationSpeedBase,
float fieldOfViewRadians,
float nearPlaneDistance,
float farPlaneDistance)
{
this.view = view;
RotationSpeedBase = rotationSpeedBase;
FieldOfViewRadians = fieldOfViewRadians;
NearPlaneDistance = nearPlaneDistance;
FarPlaneDistance = farPlaneDistance;
}
/// <summary>
/// Initializes a new instance of the <see cref="PanningCamera"/> class.
/// </summary>
/// <param name="view">The view from which to retrieve input and aspect ratio.</param>
/// <param name="fieldOfViewRadians">The camera's field of view, in radians.</param>
/// <param name="nearPlaneDistance">The distance of the near plane from the camera.</param>
/// <param name="farPlaneDistance">The ditance of the far plane from the camera.</param>
/// <param name="initialTarget">The initial position at which the camera should point.</param>
/// <param name="movementSpeed">The movement speed of the camera, in units per second per unit distance from target.</param>
/// <param name="verticalAngle">The initial angle, in radians, between the camera's view direction and the Z-axis.</param>
public PanningCamera(
MyOTKEWindow view,
float fieldOfViewRadians, // = (float)Math.PI / 4.0f;
float nearPlaneDistance, // = 0.01f;
float farPlaneDistance, // = 100f;
Vector3 initialTarget,
float movementSpeed,
float verticalAngle)
{
this.view = view;
FieldOfViewRadians = fieldOfViewRadians;
NearPlaneDistance = nearPlaneDistance;
FarPlaneDistance = farPlaneDistance;
target = initialTarget;
this.movementSpeed = movementSpeed / Distance;
this.VerticalAngle = verticalAngle;
}
/// <summary>
/// Initializes a new instance of the <see cref="Ray"/> struct that originates from a given camera position,
/// and points in the direction as indicated by the current mouse cursor position in a view.
/// </summary>
/// <param name="camera">The camera to project the ray from.</param>
/// <param name="view">The view from which to retrieve the mouse position to determine the ray's direction.</param>
public Ray(ICamera camera, MyOTKEWindow view)
{
// http://antongerdelan.net/opengl/raycasting.html
float x = (2.0f * view.CenterOffset.X) / view.ClientSize.X;
float y = -(2.0f * view.CenterOffset.Y) / view.ClientSize.Y;
var ray_clip = new Vector4(x, y, -1.0f, 0f);
Matrix4.Invert(camera.Projection, out var projInverse);
var ray_eye = projInverse * ray_clip;
ray_eye = new Vector4(ray_eye.X, ray_eye.Y, -1.0f, 0.0f);
Matrix4.Invert(camera.View, out var viewInverse);
var ray_wor = viewInverse * ray_eye;
Direction = Vector3.Normalize(new Vector3(ray_wor.X, ray_wor.Y, ray_wor.Z));
Origin = camera.Position; // todo: do we really need a camera position?
}
/// <summary>
/// Initializes a new instance of the <see cref="FirstPersonCamera"/> class.
/// </summary>
/// <param name="view">The view from which to retrieve user input.</param>
/// <param name="movementSpeed">The movement speed of the camera, in units per second.</param>
/// <param name="rotationSpeed">The "rotation speed" of the camera - the multiplicand of the mouse cursor offset to radians.</param>
/// <param name="fieldOfViewRadians">The field of view of the camera, in radians.</param>
/// <param name="nearPlaneDistance">The distance of the near plane from the camera.</param>
/// <param name="farPlaneDistance">The distance of the far plane from the camera.</param>
/// <param name="initialPosition">The initial position of the camera.</param>
/// <param name="initialHorizontalAngleRadians">The initial angle between the camera direction and the Y axis, in radians.</param>
/// <param name="initialVerticalAngleRadians">The initial angle between between the camera direction and the X axis, in radians.</param>
public FirstPersonCamera(
MyOTKEWindow view,
float movementSpeed,
float rotationSpeed,
float fieldOfViewRadians,
float nearPlaneDistance,
float farPlaneDistance,
Vector3 initialPosition,
float initialHorizontalAngleRadians,
float initialVerticalAngleRadians)
{
this.view = view;
this.MovementSpeed = movementSpeed;
this.RotationSpeed = rotationSpeed;
this.FieldOfViewRadians = fieldOfViewRadians;
this.NearPlaneDistance = nearPlaneDistance;
this.FarPlaneDistance = farPlaneDistance;
this.Position = initialPosition;
this.horizontalAngle = initialHorizontalAngleRadians;
this.verticalAngle = initialVerticalAngleRadians;
}