/// <summary>
/// Default constructor.
/// </summary>
public Camera(Scene scene)
{
_scene = scene;
// set default positioning
_position = new Vector(0.0, 0.0, 9.0);
_upVec = new Vector(0.0, 1.0, 0.0);
_center = new Vector();
// set default field of view
fov = new Angle();
fov["deg"] = 28.0;
// set default interaction factors
dollyFactor = 0.15;
panFactor = 0.05;
lastDirection = ViewDirection.Front;
Frustum = new FrustumDef();
DefaultAnimationOptions.Duration = 4.0;
DefaultAnimationOptions.EaseType = EaseType.Quadratic;
UseInertia = true;
InertiaAnimationOptions = new AnimationOptions() {
Duration = 6.0,
EaseType = EaseType.Linear
};
InertiaType = InteractionType.None;
}
/// <summary>
/// Configures the viewport based on its width and height.
/// </summary>
public virtual void Configure()
{
// initialize the projection matrix
gl.glMatrixMode(gl.GL_PROJECTION);
gl.glLoadIdentity();
// set the viewport
var width = _scene.Width;
var height = _scene.Height;
if (height == 0)
// prevent divide by zero
height = 1;
double ar = width / height;
if (projection == Projection.Perspective)
{
// store the frustum
Frustum = new FrustumDef(fov, 0.0001*Distance, 1000*Distance, ar);
// set the perspective projection matrix
glu.gluPerspective((float)fov["deg"], (float)Frustum.AR, (float)Frustum.NearDist, (float)Frustum.FarDist);
}
else // parallel
{
// determine the size of the viewing box
double h = (fov*0.5).Tan() * Distance;
gl.glOrtho(-ar*h, ar*h, -h, h, 0.001*Distance, 100*Distance);
}
// store the projection matrix for later setup
gl.glGetDoublev(gl.GL_PROJECTION_MATRIX, projectionMatrix);
// store the viewport size
//gl.glGetIntegerv(gl.GL_VIEWPORT, viewportSize);
viewportSize = new int[] {0, 0, (int)width, (int)height};
}
