/// <summary>Calculate the interpolation list for a bezier curve.</summary>
/// <param name="inputPoints">The bezier points [Start][Control1]...[End].<see cref="System.Windows.Point[]"/></param>
/// <param name="resultPointNumber">The number of requested result points.<see cref="System.Int32"/></param>
/// <param name="resultPoints">The calculated result points.<see cref="System.Windows.Point[]"/></param>
public static void CalculateInterpolationPoints(System.Windows.Point[] inputPoints, int resultPointNumber, System.Windows.Point[] resultPoints)
{
if (resultPointNumber <= 0)
{
SimpleLog.LogLine(TraceEventType.Error, CLASS_NAME + "::CalculateInterpolationPoints () Requires a positive number of result points!");
return;
}
int inputPointLength = (inputPoints.Length);
double step, t;
t = 0;
step = (double)1.0 / (resultPointNumber - 1);
for (int resultPointIndex = 0; resultPointIndex < resultPointNumber; resultPointIndex++)
{
if ((1.0 - t) < 5e-6)
{
t = 1.0;
}
resultPoints[resultPointIndex].X = 0.0;
resultPoints[resultPointIndex].Y = 0.0;
for (int i = 0; i < inputPointLength; i++)
{
double basis = Bernstein(inputPointLength - 1, i, t);
resultPoints[resultPointIndex].X += basis * inputPoints[i].X;
resultPoints[resultPointIndex].Y += basis * inputPoints[i].Y;
}
t += step;
}
}
// ###############################################################################
// ### M E T H O D S
// ###############################################################################
#region Methods
/// <summary>Add an item to the end of the list.</summary>
/// <param name="item">The style to add to the list.<see cref="ITextStyle"/></param>
/// <remarks>The list is limited to a maximum of 32 styles.</remarks>
public void Add(ITextStyle item)
{
if (_styles.Count >= 32)
{
SimpleLog.LogLine(TraceEventType.Error, CLASS_NAME + "::Add () Can't handle more than 32 styles!");
}
else
{
_styles.Add(item);
}
}
/// <summary>Calculate the interpolation list for a arc curve.</summary>
/// <param name="centerX">The arc center point x coordinate.<see cref="System.Double"/></param>
/// <param name="centerY">The arc center point y coordinate.<see cref="System.Double"/></param>
/// <param name="radiusX">The arc radius at x axis.<see cref="System.Double"/></param>
/// <param name="radiusY">The arc radius at y axis.<see cref="System.Double"/></param>
/// <param name="startAngle">The arc start angle in radiants relative to the 12 o'clock position.<see cref="System.Double"/></param>
/// <param name="endAngle">The arc end angle in radiants relative to the 12 o'clock position.<see cref="System.Double"/></param>
/// <param name="reverseDirection">The arc has to be drawn in reverse direction (counterclockwise).<see cref="System.Boolean"/></param>
/// <param name="resultPointNumber">The number of requested result points.<see cref="System.Int32"/></param>
/// <param name="resultPoints">The calculated result points.<see cref="System.Windows.Point[]"/></param>
public static void CalculateInterpolationPoints(double centerX, double centerY, double radiusX, double radiusY, double startAngle, double endAngle,
bool reverseDirection, int resultPointNumber, System.Windows.Point[] resultPoints)
{
if (resultPointNumber <= 0)
{
SimpleLog.LogLine(TraceEventType.Error, CLASS_NAME + "::CalculateInterpolationPoints () Requires a positive number of result points!");
return;
}
double angle = Math.Abs(endAngle - startAngle);
if (reverseDirection)
{
angle = Math.PI * 2 - angle;
}
if (endAngle < startAngle)
{
angle = -angle;
}
double angleStep = angle / (resultPointNumber - 1);
if (reverseDirection)
{
angleStep = -angleStep;
}
double currentAngle = startAngle;
for (int resultPointIndex = 0; resultPointIndex < resultPointNumber; resultPointIndex++)
{
resultPoints[resultPointIndex].X = centerX + (radiusX * Math.Sin(currentAngle));
// Y-axis has negative direction!
resultPoints[resultPointIndex].Y = centerY - (radiusY * Math.Cos(currentAngle));
if (resultPointIndex == resultPointNumber - 2)
{
currentAngle = endAngle;
}
else
{
currentAngle += angleStep;
}
}
}
/// <summary>Add the elements of the specified collection to the end of the list.</summary>
/// <param name="collection">The collection whose elements are added to the end of the list.<see cref="IEnumerable<ITextStyle>"/></param>
/// <remarks>The list is limited to a maximum of 32 styles.</remarks>
public void AddRange(IEnumerable <ITextStyle> collection)
{
if (collection == null)
{
throw new ArgumentNullException("collection");
}
foreach (ITextStyle item in collection)
{
if (_styles.Count >= 32)
{
SimpleLog.LogLine(TraceEventType.Error, CLASS_NAME + "::AddRange () Can't handle more than 32 styles!");
return;
}
else
{
_styles.Add(item);
}
}
}
