public ModelPanel()
{
_camera = new GLCamera();
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.ModelPanel_MouseDown);
this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.ModelPanel_MouseMove);
this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.ModelPanel_MouseUp);
}
public Vector3 TraceZ(Vector3 point, float z)
{
GLCamera camera = CurrentViewport.Camera;
if (camera == null)
{
return(new Vector3());
}
double a = point._z - z;
//Perform trig functions, using camera for angles
//Get angle, truncating to MOD 180
//double angleX = _camera._rotation._y - ((int)(_camera._rotation._y / 180.0) * 180);
double angleX = Math.IEEERemainder(-camera._rotation._y, 180.0);
if (angleX < -90.0f)
{
angleX = -180.0f - angleX;
}
if (angleX > 90.0f)
{
angleX = 180.0f - angleX;
}
double angleY = Math.IEEERemainder(camera._rotation._x, 180.0);
if (angleY < -90.0f)
{
angleY = -180.0f - angleY;
}
if (angleY > 90.0f)
{
angleY = 180.0f - angleY;
}
float lenX = (float)(Math.Tan(angleX * Math.PI / 180.0) * a);
float lenY = (float)(Math.Tan(angleY * Math.PI / 180.0) * a);
return(new Vector3(point._x + lenX, point._y + lenY, z));
}