Example #1
0
        /// <summary>
        /// Gets the angle this vector is at in relationship to another Vector.
        /// Take note that 0 degrees increases clockwise.
        /// </summary>
        /// <param name="src"></param>
        /// <returns></returns>
        public double GetAngleFromClockwise(Vector2D src)
        {
            double angle = 0.0d;

            // We are within 0° - 180°.
            if (this.Y > src.Y)
            {
                // We are in Quadrant I (0° - 90°).
                if (this.X > src.X)
                {
                    angle = (double)(this.X - src.X) / (double)(this.Y - src.Y);
                    angle = Math.Atan(angle);
                    angle = 90 - Mathlib.ToDegrees(angle);
                }
                else if (this.X < src.X)
                {
                    // We are in Quadrant II (91° - 180°).
                    angle = (double)(src.X - this.X) / (double)(this.Y - src.Y);
                    angle = Math.Atan(-angle);
                    angle = 90 - Mathlib.ToDegrees(angle);
                }
                else if (this.X == src.X)
                {
                    // We are between Quadrant I and II (90°).
                    angle = 90;
                }
            }
            else if (this.Y < src.Y)
            {
                // We are in Quadrant III (180° - 270°).
                if (this.X < src.X)
                {
                    angle = (double)(src.X - this.X) / (double)(src.Y - this.Y);
                    angle = Math.Atan(angle);
                    angle = 270 - Mathlib.ToDegrees(angle);
                }
                // We are in Quadrant IV (271° - 360°).
                else if (this.X > src.X)
                {
                    angle = (double)(this.X - src.X) / (double)(src.Y - this.Y);
                    angle = Math.Atan(-angle);
                    angle = 270 - Mathlib.ToDegrees(angle);
                }
                // We are between Quadrant III and IV (270°).
                else if (this.X == src.X)
                {
                    angle = 270;
                }
            }
            else if (this.Y == src.Y)
            {
                // We are at 180°.
                if (this.X < src.X)
                {
                    angle = 180;
                }
                // We are at 0° or 360°.
                else if (this.X > src.X)
                {
                    angle = 0;
                }
            }

            return(angle);
        }
Example #2
0
        /// <summary>
        /// Returns the current theta (facing) of this vector in Degrees.
        /// </summary>
        /// <returns></returns>
        public double GetThetaAsDegree()
        {
            double angle = GetThetaAsRadian();

            return(Mathlib.ToDegrees(angle));
        }