Esempio n. 1
0
        public static bool Animate(
            Point3D currentValue, Vector3D currentVelocity, Point3D targetValue,
            double attractionFator, double dampening,
            double terminalVelocity, double minValueDelta, double minVelocityDelta,
            out Point3D newValue, out Vector3D newVelocity)
        {
            Debug.Assert(currentValue.IsValid());
            Debug.Assert(currentVelocity.IsValid());
            Debug.Assert(targetValue.IsValid());

            Debug.Assert(dampening.IsValid());
            Debug.Assert(dampening > 0 && dampening < 1);

            Debug.Assert(attractionFator.IsValid());
            Debug.Assert(attractionFator > 0);

            Debug.Assert(terminalVelocity > 0);

            Debug.Assert(minValueDelta > 0);
            Debug.Assert(minVelocityDelta > 0);

            Vector3D diff = targetValue - currentValue;

            if (diff.Length > minValueDelta || currentVelocity.Length > minVelocityDelta)
            {
                newVelocity = currentVelocity * (1 - dampening);
                newVelocity += diff * attractionFator;
                newVelocity *= (currentVelocity.Length > terminalVelocity) ? terminalVelocity / currentVelocity.Length : 1;

                newValue = currentValue + newVelocity;

                return true;
            }
            else
            {
                newValue = targetValue;
                newVelocity = new Vector3D();
                return false;
            }
        }
Esempio n. 2
0
        /// <summary>
        /// Rotates the camera about the specified axis and center point by the specified angle in degrees.
        /// </summary>
        public void Rotate(Vector3D axis, double angle, Point3D center)
        {
            if (!center.IsValid())
                center = Math3D.Origin;

            Position = Position.Subtract(center);
            Rotate(axis, angle);
            Position = Position.Add(center);
        }