/// <summary>
/// 计算同一容器中一组控件的最小外接矩形。
/// </summary>
/// <param name="ctrls">控件数组。</param>
/// <param name="edgeDist">矩形的每边到控件边缘的距离。</param>
/// <returns>Point 结构，表示同一容器中一组控件的最小外接矩形。</returns>
public static Rectangle GetMinimumBoundingRectangleOfControls(Control[] ctrls, int edgeDist)
{
if (InternalMethod.IsNullOrEmpty(ctrls))
{
return(Rectangle.Empty);
}
else
{
int L = int.MaxValue, R = int.MinValue, T = int.MaxValue, B = int.MinValue;
foreach (Control Ctrl in ctrls)
{
if (!(Ctrl is null))
{
L = Math.Min(L, Ctrl.Left);
T = Math.Min(T, Ctrl.Top);
R = Math.Max(R, Ctrl.Right);
B = Math.Max(B, Ctrl.Bottom);
}
}
edgeDist = Math.Max(0, edgeDist);
return(Rectangle.FromLTRB(L - edgeDist, T - edgeDist, R + edgeDist - 1, B + edgeDist - 1));
}
}
/// <summary>
/// 返回一个以 "d° m′ s″ " 格式表示角度的字符串。
/// </summary>
/// <param name="degree">以角度为单位的角度。</param>
/// <param name="decimalDigits">保留的小数位数，0 表示不保留小数，-1 表示保留所有小数。</param>
/// <param name="cutdownIdleZeros">是否删除小数点后所有不必要的 "0"。</param>
/// <returns>字符串，表示以 "d° m′ s″ " 格式表示的角度。</returns>
public static string GetAngleStringOfDegree(double degree, int decimalDigits, bool cutdownIdleZeros)
{
if (InternalMethod.IsNaNOrInfinity(degree))
{
return("N/A");
}
else
{
string Sign = (degree < 0 ? "-" : string.Empty);
degree = Math.Abs(degree);
double DegF = degree;
double DegD = Math.Floor(DegF);
double MinF = (DegF - DegD) * 60;
double MinD = Math.Floor(MinF);
double SecF = (MinF - MinD) * 60;
string DegStr = DegD + "° ";
string MinStr = MinD + "′ ";
string SecStr = SecF.ToString(decimalDigits >= 0 ? "N" + Math.Min(16, decimalDigits) : string.Empty) + "″ ";
if (cutdownIdleZeros)
{
int DotIndex = SecStr.IndexOf('.');
if (DotIndex >= 0)
{
int LastPartIndex = DotIndex + 1;
while (LastPartIndex < SecStr.Length && char.IsDigit(SecStr, LastPartIndex))
{
LastPartIndex++;
}
string HeadPart = SecStr.Substring(0, DotIndex);
string MiddlePart = SecStr.Substring(DotIndex, LastPartIndex - DotIndex);
string LastPart = (LastPartIndex < SecStr.Length ? SecStr.Substring(LastPartIndex) : string.Empty);
if (MiddlePart.Length > 0)
{
while (MiddlePart[MiddlePart.Length - 1] == '0')
{
MiddlePart = MiddlePart.Substring(0, MiddlePart.Length - 1);
}
if (MiddlePart.Length == 1)
{
MiddlePart = string.Empty;
}
}
SecStr = string.Concat(HeadPart, MiddlePart, LastPart);
}
}
return(string.Concat(Sign, DegStr, MinStr, SecStr));
}
}
/// <summary>
/// 判断在一个圆内部能否看到一个点。
/// </summary>
/// <param name="pt">点。</param>
/// <param name="offset">圆的圆心。</param>
/// <param name="radius">圆的半径。</param>
/// <returns>布尔值，表示在一个圆内部能否看到一个点。</returns>
public static bool PointIsVisibleInCircle(PointD pt, PointD offset, double radius)
{
if (pt.IsNaNOrInfinity || offset.IsNaNOrInfinity || (InternalMethod.IsNaNOrInfinity(radius) || radius <= 0))
{
return(false);
}
else
{
return(pt.DistanceFrom(offset) < radius);
}
}
/// <summary>
/// 计算椭圆在指定相位的焦半径。
/// </summary>
/// <param name="semiMajorAxis">椭圆的半长轴。</param>
/// <param name="eccentricity">椭圆的离心率。</param>
/// <param name="phase">椭圆的相位（弧度）（以近焦点相位为 0 弧度，从 +X 轴指向 +Y 轴的方向为正方向）。</param>
/// <returns>双精度浮点数，表示椭圆在指定相位的焦半径。</returns>
public static double GetFocalRadiusOfEllipse(double semiMajorAxis, double eccentricity, double phase)
{
if ((InternalMethod.IsNaNOrInfinity(semiMajorAxis) || semiMajorAxis <= 0) || (InternalMethod.IsNaNOrInfinity(eccentricity) || eccentricity < 0 || eccentricity >= 1) || InternalMethod.IsNaNOrInfinity(phase))
{
return(double.NaN);
}
else
{
return(semiMajorAxis * Math.Sqrt(Math.Pow(Math.Cos(phase) - eccentricity, 2) + (1 - Math.Pow(eccentricity, 2)) * Math.Pow(Math.Sin(phase), 2)));
}
}
/// <summary>
/// 将椭圆的圆心角转换为相位（弧度）（以近焦点相位为 0 弧度，从 +X 轴指向 +Y 轴的方向为正方向）。
/// </summary>
/// <param name="centralAngle">椭圆的圆心角（弧度）。</param>
/// <param name="eccentricity">椭圆的离心率。</param>
/// <returns>双精度浮点数，表示将椭圆的圆心角转换为相位（弧度）（以近焦点相位为 0 弧度，从 +X 轴指向 +Y 轴的方向为正方向）得到的结果。</returns>
public static double EllipseCentralAngleToPhase(double centralAngle, double eccentricity)
{
if (InternalMethod.IsNaNOrInfinity(centralAngle) || (InternalMethod.IsNaNOrInfinity(eccentricity) || eccentricity < 0 || eccentricity >= 1))
{
return(double.NaN);
}
else
{
return(Math.Atan(Math.Tan(centralAngle) / Math.Sqrt(1 - Math.Pow(eccentricity, 2))) + Math.Round(centralAngle / Constant.Pi) * Constant.Pi);
}
}
/// <summary>
/// 计算同一容器中一组控件的最小外接矩形。
/// </summary>
/// <param name="ctrls">控件数组。</param>
/// <returns>Point 结构，表示同一容器中一组控件的最小外接矩形。</returns>
public static Rectangle GetMinimumBoundingRectangleOfControls(Control[] ctrls)
{
if (InternalMethod.IsNullOrEmpty(ctrls))
{
return(Rectangle.Empty);
}
else
{
return(GetMinimumBoundingRectangleOfControls(ctrls, 0));
}
}
/// <summary>
/// 返回将一个时间间隔在合适的单位下保留指定位数有效数字的数值。
/// </summary>
/// <param name="seconds">时间间隔（秒）。</param>
/// <param name="significance">有效数字位数，0 表示保留所有有效数字。</param>
/// <returns>双精度浮点数，表示将一个时间间隔在合适的单位下保留指定位数有效数字的数值。</returns>
public static double GetStandardizationTimespanOfSecond(double seconds, int significance)
{
if (InternalMethod.IsNaNOrInfinity(seconds))
{
return(double.NaN);
}
else
{
if (seconds != 0 && significance > 0)
{
int sign = Math.Sign(seconds);
seconds = Math.Abs(seconds);
double unit = 1;
if (seconds >= 31557600.0)
{
seconds /= (unit = 31557600.0);
}
else if (seconds >= 86400.0)
{
seconds /= (unit = 86400.0);
}
else if (seconds >= 3600.0)
{
seconds /= (unit = 3600.0);
}
else if (seconds >= 60.0)
{
seconds /= (unit = 60.0);
}
else if (seconds < 1)
{
seconds /= (unit = 0.001);
}
int exp = (int)Math.Floor(Math.Log10(Math.Abs(seconds))) - Math.Max(0, significance - 1);
seconds = Math.Round(seconds / Math.Pow(10, exp));
while (seconds >= 10)
{
seconds /= 10;
exp++;
}
seconds *= (sign * Math.Pow(10, exp) * unit);
}
return(seconds);
}
}
/// <summary>
/// 判断在一个菱形内部能否看到一个点。
/// </summary>
/// <param name="pt">点。</param>
/// <param name="offset">菱形的中心。</param>
/// <param name="semiMajorAxis">菱形的半长轴。</param>
/// <param name="semiMinorAxis">菱形的半短轴。</param>
/// <param name="rotateAngle">菱形的旋转角（弧度）（以焦点为中心，以 +X 轴为 0 弧度，从 +X 轴指向 +Y 轴的方向为正方向，半长轴相对于 +X 轴的角度）。</param>
/// <returns>布尔值，表示在一个菱形内部能否看到一个点。</returns>
public static bool PointIsVisibleInRhombus(PointD pt, PointD offset, double semiMajorAxis, double semiMinorAxis, double rotateAngle)
{
if (pt.IsNaNOrInfinity || offset.IsNaNOrInfinity || (InternalMethod.IsNaNOrInfinity(semiMajorAxis) || semiMajorAxis <= 0) || (InternalMethod.IsNaNOrInfinity(semiMinorAxis) || semiMinorAxis <= 0) || InternalMethod.IsNaNOrInfinity(rotateAngle))
{
return(false);
}
else
{
pt.Rotate(-rotateAngle, offset);
return(Math.Abs(pt.X - offset.X) * semiMinorAxis + Math.Abs(pt.Y - offset.Y) * semiMajorAxis < semiMajorAxis * semiMinorAxis);
}
}
/// <summary>
/// 判断在一个椭圆内部能否看到一个点。
/// </summary>
/// <param name="pt">点。</param>
/// <param name="offset">椭圆的焦点。</param>
/// <param name="semiMajorAxis">椭圆的半长轴。</param>
/// <param name="eccentricity">椭圆的离心率。</param>
/// <param name="rotateAngle">椭圆的旋转角（弧度）（以焦点为中心，以 +X 轴为 0 弧度，从 +X 轴指向 +Y 轴的方向为正方向，焦点到近焦点连线相对于 +X 轴的角度）。</param>
/// <returns>布尔值，表示在一个椭圆内部能否看到一个点。</returns>
public static bool PointIsVisibleInEllipse(PointD pt, PointD offset, double semiMajorAxis, double eccentricity, double rotateAngle)
{
if (pt.IsNaNOrInfinity || offset.IsNaNOrInfinity || (InternalMethod.IsNaNOrInfinity(semiMajorAxis) || semiMajorAxis <= 0) || (InternalMethod.IsNaNOrInfinity(eccentricity) || eccentricity < 0 || eccentricity >= 1) || InternalMethod.IsNaNOrInfinity(rotateAngle))
{
return(false);
}
else
{
PointD _Offset = new PointD(offset.X - 2 * semiMajorAxis * eccentricity * Math.Cos(rotateAngle), offset.Y - 2 * semiMajorAxis * eccentricity * Math.Sin(rotateAngle));
double FocalDistSum = pt.DistanceFrom(offset) + pt.DistanceFrom(_Offset);
return(FocalDistSum < 2 * semiMajorAxis);
}
}
/// <summary>
/// 返回将一个距离在合适的单位下保留指定位数有效数字的数值。
/// </summary>
/// <param name="meters">距离（米）。</param>
/// <param name="significance">有效数字位数，0 表示保留所有有效数字。</param>
/// <returns>双精度浮点数，表示将一个距离在合适的单位下保留指定位数有效数字的数值。</returns>
public static double GetStandardizationDistanceOfMeter(double meters, int significance)
{
if (InternalMethod.IsNaNOrInfinity(meters))
{
return(double.NaN);
}
else
{
if (meters != 0 && significance > 0)
{
int sign = Math.Sign(meters);
meters = Math.Abs(meters);
double unit = 1;
if (meters >= 9460730472580800.0)
{
meters /= (unit = 9460730472580800.0);
}
else if (meters >= 149597870700.0)
{
meters /= (unit = 149597870700.0);
}
else if (meters >= 1000.0)
{
meters /= (unit = 1000.0);
}
int exp = (int)Math.Floor(Math.Log10(Math.Abs(meters))) - Math.Max(0, significance - 1);
meters = Math.Round(meters / Math.Pow(10, exp));
while (meters >= 10)
{
meters /= 10;
exp++;
}
meters *= (sign * Math.Pow(10, exp) * unit);
}
return(meters);
}
}
/// <summary>
/// 计算平面直角坐标系中过一个定点到一条直线的距离。
/// </summary>
/// <param name="pt">定点。</param>
/// <param name="A">直线的一般式方程的第一个参数。</param>
/// <param name="B">直线的一般式方程的第二个参数。</param>
/// <param name="C">直线的一般式方程的第三个参数。</param>
/// <returns>双精度浮点数，表示平面直角坐标系中过一个定点到一条直线的距离。</returns>
public static double GetDistanceBetweenPointAndLine(PointD pt, double A, double B, double C)
{
if (pt.IsNaNOrInfinity || InternalMethod.IsNaNOrInfinity(A) || InternalMethod.IsNaNOrInfinity(B) || InternalMethod.IsNaNOrInfinity(C))
{
return(double.NaN);
}
else
{
if (A == 0 && B == 0)
{
return(double.NaN);
}
else
{
return((A * pt.X + B * pt.Y + C) / Math.Sqrt(A * A + B * B));
}
}
}
//
private static double _CheckProportion(double proportion) // 对双精度浮点数表示的比例的值进行合法性检查，返回合法的值。
{
if (InternalMethod.IsNaNOrInfinity(proportion))
{
throw new ArgumentOutOfRangeException();
}
//
if (proportion < 0)
{
if (proportion <= -5E-13)
{
throw new ArgumentOutOfRangeException();
}
return(0);
}
else if (proportion > 100)
{
if (proportion >= 100 + 5E-11)
{
throw new ArgumentOutOfRangeException();
}
return(1);
}
else
{
if (proportion > 1)
{
return(proportion / 100);
}
else
{
return(proportion);
}
}
}
/// <summary>
/// 返回一个表示时间间隔的字符串。
/// </summary>
/// <param name="seconds">时间间隔（秒）。</param>
/// <returns>字符串，表示时间间隔。</returns>
public static string GetLargeTimespanStringOfSecond(double seconds)
{
if (InternalMethod.IsNaNOrInfinity(seconds))
{
return("N/A");
}
else
{
if (seconds == 0)
{
return("0");
}
else
{
int Sign = Math.Sign(seconds);
seconds = Math.Abs(seconds);
return((Sign == -1 ? "-" : string.Empty) + (seconds >= 31557600E12 ? seconds / (31557600E12) + " Ta" : (seconds >= 31557600E9 ? seconds / (31557600E9) + " Ga" : (seconds >= 31557600E6 ? seconds / (31557600E6) + " Ma" : (seconds >= 31557600E3 ? seconds / (31557600E3) + " ka" : (seconds >= 31557600.0 ? seconds / 31557600.0 + " a" : (seconds >= 86400.0 ? seconds / 86400.0 + " d" : (seconds >= 3600.0 ? seconds / 3600.0 + " h" : (seconds >= 60 ? seconds / 60.0 + " min" : (seconds >= 1 ? seconds + " s" : seconds * 1000.0 + " ms"))))))))));
}
}
}
/// <summary>
/// 返回一个表示距离的字符串。
/// </summary>
/// <param name="meters">距离（米）。</param>
/// <returns>字符串，表示距离。</returns>
public static string GetLargeDistanceStringOfMeter(double meters)
{
if (InternalMethod.IsNaNOrInfinity(meters))
{
return("N/A");
}
else
{
if (meters == 0)
{
return("0");
}
else
{
int Sign = Math.Sign(meters);
meters = Math.Abs(meters);
return((Sign == -1 ? "-" : string.Empty) + (meters >= 9460730472580800E12 ? meters / 9460730472580800E12 + " Tly" : (meters >= 9460730472580800E9 ? meters / 9460730472580800E9 + " Gly" : (meters >= 9460730472580800E6 ? meters / 9460730472580800E6 + " Mly" : (meters >= 9460730472580800E3 ? meters / 9460730472580800E3 + " kly" : (meters >= 9460730472580800.0 ? meters / 9460730472580800.0 + " ly" : (meters >= 149597870700.0 ? meters / 149597870700.0 + " AU" : (meters >= 1000.0 ? meters / 1000.0 + " km" : meters + " m"))))))));
}
}
}
//
private static double _CheckLevel(double level) // 对双精度浮点数表示的调整程度的值进行合法性检查，返回合法的值。
{
if (InternalMethod.IsNaNOrInfinity(level))
{
throw new ArgumentOutOfRangeException();
}
//
if (level < -100)
{
if (level <= -100 - 5E-11)
{
throw new ArgumentOutOfRangeException();
}
return(-1);
}
else if (level > 100)
{
if (level >= 100 + 5E-11)
{
throw new ArgumentOutOfRangeException();
}
return(1);
}
else
{
if (level < -1 || level > 1)
{
return(level / 100);
}
else
{
return(level);
}
}
}
//
/// <summary>
/// 将一个角度映射到范围为一个周角的区间。
/// </summary>
/// <param name="angle">用于转换的角度。</param>
/// <param name="asDegree">用于转换的角度是否以角度制表示。</param>
/// <param name="zeroCentered">目标区间是否以 0 为中心。</param>
/// <returns>双精度浮点数，表示将一个角度映射到范围为一个周角的区间得到的结果。</returns>
public static double AngleMapping(double angle, bool asDegree, bool zeroCentered)
{
if (InternalMethod.IsNaNOrInfinity(angle))
{
return(double.NaN);
}
else
{
double result = angle;
double perigon = (asDegree ? 360 : Constant.DoublePi);
if (angle < 0 || angle >= perigon)
{
result = angle - Math.Floor(angle / perigon) * perigon;
}
if (zeroCentered)
{
double flat = (asDegree ? 180 : Constant.Pi);
if (result >= flat)
{
return(result - flat);
}
else
{
return(result);
}
}
else
{
return(result);
}
}
}
/// <summary>
/// 将位图的副本按顺时针方向旋转一个角度，返回旋转后得到的位图。
/// </summary>
/// <param name="bmp">用于旋转的位图。</param>
/// <param name="rotateAngle">按顺时针方向旋转的角度（弧度）。</param>
/// <param name="antiAlias">是否使用抗锯齿模式绘图。</param>
/// <returns>Bitmap 对象，表示将位图的副本按顺时针方向旋转一个角度得到的结果。</returns>
public static Bitmap RotateBitmap(Bitmap bmp, double rotateAngle, bool antiAlias)
{
if (bmp is null || InternalMethod.IsNaNOrInfinity(rotateAngle))
{
return(null);
}
/// <summary>
/// 判断在一个矩形内部能否看到一个圆的圆周的部分或全部。
/// </summary>
/// <param name="offset">圆的圆心。</param>
/// <param name="radius">圆的半径。</param>
/// <param name="rect">矩形。</param>
/// <returns>布尔值，表示在一个矩形内部能否看到一个圆的圆周的部分或全部。</returns>
public static bool CircumferenceIsVisibleInRectangle(PointD offset, double radius, RectangleF rect)
{
if (offset.IsNaNOrInfinity || (InternalMethod.IsNaNOrInfinity(radius) || radius <= 0) || rect.Size.IsEmpty)
{
return(false);
}
else
{
if (offset.X < rect.X && offset.Y < rect.Y)
{
if (Math.Pow(offset.X - rect.X, 2) + Math.Pow(offset.Y - rect.Y, 2) < Math.Pow(radius, 2) && Math.Pow(offset.X - rect.Right, 2) + Math.Pow(offset.Y - rect.Bottom, 2) > Math.Pow(radius, 2))
{
return(true);
}
else
{
return(false);
}
}
else if (offset.X > rect.Right && offset.Y < rect.Y)
{
if (Math.Pow(offset.X - rect.Right, 2) + Math.Pow(offset.Y - rect.Y, 2) < Math.Pow(radius, 2) && Math.Pow(offset.X - rect.X, 2) + Math.Pow(offset.Y - rect.Bottom, 2) > Math.Pow(radius, 2))
{
return(true);
}
else
{
return(false);
}
}
else if (offset.X < rect.X && offset.Y > rect.Bottom)
{
if (Math.Pow(offset.X - rect.X, 2) + Math.Pow(offset.Y - rect.Bottom, 2) < Math.Pow(radius, 2) && Math.Pow(offset.X - rect.Right, 2) + Math.Pow(offset.Y - rect.Y, 2) > Math.Pow(radius, 2))
{
return(true);
}
else
{
return(false);
}
}
else if (offset.X > rect.Right && offset.Y > rect.Bottom)
{
if (Math.Pow(offset.X - rect.Right, 2) + Math.Pow(offset.Y - rect.Bottom, 2) < Math.Pow(radius, 2) && Math.Pow(offset.X - rect.X, 2) + Math.Pow(offset.Y - rect.Y, 2) > Math.Pow(radius, 2))
{
return(true);
}
else
{
return(false);
}
}
else
{
if (2 * radius >= Math.Sqrt(Math.Pow(rect.Width, 2) + Math.Pow(rect.Height, 2)))
{
if (((offset.X >= rect.X - radius && offset.X <= rect.Right + radius) && (offset.Y >= rect.Y - radius && offset.Y <= rect.Bottom + radius)) && !((offset.X >= rect.Right - Constant.HalfSqrt2 * radius && offset.X <= rect.X + Constant.HalfSqrt2 * radius) && (offset.Y >= rect.Bottom - Constant.HalfSqrt2 * radius && offset.Y <= rect.Y + Constant.HalfSqrt2 * radius)))
{
return(true);
}
else
{
return(false);
}
}
else
{
if (offset.X >= rect.X - radius && offset.X <= rect.Right + radius && offset.Y >= rect.Y - radius && offset.Y <= rect.Bottom + radius)
{
return(true);
}
else
{
return(false);
}
}
}
}
}
/// <summary>
/// 判断在一个矩形内部能否看到一个圆的内部或者圆周的部分或全部。
/// </summary>
/// <param name="offset">圆的圆心。</param>
/// <param name="radius">圆的半径。</param>
/// <param name="rect">矩形。</param>
/// <returns>布尔值，表示在一个矩形内部能否看到一个圆的内部或者圆周的部分或全部。</returns>
public static bool CircleInnerIsVisibleInRectangle(PointD offset, double radius, RectangleF rect)
{
if (offset.IsNaNOrInfinity || (InternalMethod.IsNaNOrInfinity(radius) || radius <= 0) || rect.Size.IsEmpty)
{
return(false);
}
else
{
if (offset.X < rect.X && offset.Y < rect.Y)
{
if (Math.Pow(offset.X - rect.X, 2) + Math.Pow(offset.Y - rect.Y, 2) < Math.Pow(radius, 2))
{
return(true);
}
else
{
return(false);
}
}
else if (offset.X > rect.Right && offset.Y < rect.Y)
{
if (Math.Pow(offset.X - rect.Right, 2) + Math.Pow(offset.Y - rect.Y, 2) < Math.Pow(radius, 2))
{
return(true);
}
else
{
return(false);
}
}
else if (offset.X < rect.X && offset.Y > rect.Bottom)
{
if (Math.Pow(offset.X - rect.X, 2) + Math.Pow(offset.Y - rect.Bottom, 2) < Math.Pow(radius, 2))
{
return(true);
}
else
{
return(false);
}
}
else if (offset.X > rect.Right && offset.Y > rect.Bottom)
{
if (Math.Pow(offset.X - rect.Right, 2) + Math.Pow(offset.Y - rect.Bottom, 2) < Math.Pow(radius, 2))
{
return(true);
}
else
{
return(false);
}
}
else if (offset.X >= rect.X - radius && offset.X <= rect.Right + radius && offset.Y >= rect.Y - radius && offset.Y <= rect.Bottom + radius)
{
return(true);
}
else
{
return(false);
}
}
}
/// <summary>
/// 判断在一个圆内部能否看到一个直线段的部分或全部。
/// </summary>
/// <param name="pt1">直线段的第一个端点。</param>
/// <param name="pt2">直线段的第二个端点。</param>
/// <param name="offset">圆的圆心。</param>
/// <param name="radius">圆的半径。</param>
/// <returns>布尔值，表示在一个圆内部能否看到一个直线段的部分或全部。</returns>
public static bool LineIsVisibleInCircle(PointD pt1, PointD pt2, PointD offset, double radius)
{
if (pt1.IsNaNOrInfinity || pt2.IsNaNOrInfinity || offset.IsNaNOrInfinity || (InternalMethod.IsNaNOrInfinity(radius) || radius <= 0))
{
return(false);
}
else
{
double Dist_Off_P1 = offset.DistanceFrom(pt1);
double Dist_Off_P2 = offset.DistanceFrom(pt2);
if (Dist_Off_P1 <= radius || Dist_Off_P2 <= radius)
{
return(true);
}
else
{
double A, B, C;
CalcLineGeneralFunction(pt1, pt2, out A, out B, out C);
double Dist_Off_FP = GetDistanceBetweenPointAndLine(offset, A, B, C);
if (Dist_Off_FP > radius)
{
return(false);
}
else
{
if ((A * pt1.X + B * pt1.Y + C) * (A * pt2.X + B * pt2.Y + C) > 0)
{
return(false);
}
else
{
return(true);
}
}
}
}
}
private static readonly PointD3D _NormalVectorPZX = new PointD3D(0, 1, 0); // 正方体表面的 +ZX 法向量。
//
/// <summary>
/// 绘制一个长方体，并返回表示是否已经实际完成绘图的布尔值。
/// </summary>
/// <param name="bmp">用于绘制的位图。</param>
/// <param name="center">长方体的中心坐标。</param>
/// <param name="size">长方体的大小。</param>
/// <param name="color">长方体的颜色。</param>
/// <param name="edgeWidth">长方体的棱的宽度。</param>
/// <param name="affineMatrices">仿射矩阵（左矩阵）列表。</param>
/// <param name="focalLength">焦距。</param>
/// <param name="illuminationDirection">光照方向。</param>
/// <param name="illuminationDirectionIsAfterAffineTransform">光照方向是否基于仿射变换之后的坐标系。</param>
/// <param name="exposure">曝光，取值范围为 [-100, 100]。</param>
/// <param name="antiAlias">是否使用抗锯齿模式绘图。</param>
/// <returns>布尔值，表示是否已经实际完成绘图。</returns>
public static bool PaintCuboid(Bitmap bmp, PointD3D center, PointD3D size, Color color, float edgeWidth, List <Matrix> affineMatrices, double focalLength, PointD3D illuminationDirection, bool illuminationDirectionIsAfterAffineTransform, double exposure, bool antiAlias)
{
try
{
if (bmp is null || center.IsNaNOrInfinity || (size.IsNaNOrInfinity || size.IsZero) || (color.IsEmpty || color.A == 0) || InternalMethod.IsNaNOrInfinity(edgeWidth) || InternalMethod.IsNullOrEmpty(affineMatrices) || (InternalMethod.IsNaNOrInfinity(focalLength) || focalLength < 0) || illuminationDirection.IsNaNOrInfinity || InternalMethod.IsNaNOrInfinity(exposure))
{
return(false);
}
else
{
PointD3D P3D_000 = _Vertex000;
PointD3D P3D_100 = _Vertex100;
PointD3D P3D_010 = _Vertex010;
PointD3D P3D_110 = _Vertex110;
PointD3D P3D_001 = _Vertex001;
PointD3D P3D_101 = _Vertex101;
PointD3D P3D_011 = _Vertex011;
PointD3D P3D_111 = _Vertex111;
P3D_000.Scale(size);
P3D_100.Scale(size);
P3D_010.Scale(size);
P3D_110.Scale(size);
P3D_001.Scale(size);
P3D_101.Scale(size);
P3D_011.Scale(size);
P3D_111.Scale(size);
P3D_000.Offset(center);
P3D_100.Offset(center);
P3D_010.Offset(center);
P3D_110.Offset(center);
P3D_001.Offset(center);
P3D_101.Offset(center);
P3D_011.Offset(center);
P3D_111.Offset(center);
P3D_000.AffineTransform(affineMatrices);
P3D_100.AffineTransform(affineMatrices);
P3D_010.AffineTransform(affineMatrices);
P3D_110.AffineTransform(affineMatrices);
P3D_001.AffineTransform(affineMatrices);
P3D_101.AffineTransform(affineMatrices);
P3D_011.AffineTransform(affineMatrices);
P3D_111.AffineTransform(affineMatrices);
PointD3D PrjCenter = new PointD3D(bmp.Width / 2, bmp.Height / 2, 0);
PointD P2D_000 = P3D_000.ProjectToXY(PrjCenter, focalLength);
PointD P2D_100 = P3D_100.ProjectToXY(PrjCenter, focalLength);
PointD P2D_010 = P3D_010.ProjectToXY(PrjCenter, focalLength);
PointD P2D_110 = P3D_110.ProjectToXY(PrjCenter, focalLength);
PointD P2D_001 = P3D_001.ProjectToXY(PrjCenter, focalLength);
PointD P2D_101 = P3D_101.ProjectToXY(PrjCenter, focalLength);
PointD P2D_011 = P3D_011.ProjectToXY(PrjCenter, focalLength);
PointD P2D_111 = P3D_111.ProjectToXY(PrjCenter, focalLength);
PointF P_000 = P2D_000.ToPointF();
PointF P_100 = P2D_100.ToPointF();
PointF P_010 = P2D_010.ToPointF();
PointF P_110 = P2D_110.ToPointF();
PointF P_001 = P2D_001.ToPointF();
PointF P_101 = P2D_101.ToPointF();
PointF P_011 = P2D_011.ToPointF();
PointF P_111 = P2D_111.ToPointF();
PointD3D[][] Element3D = new PointD3D[][]
{
// XY 面
new PointD3D[] { P3D_000, P3D_010, P3D_110, P3D_100 },
new PointD3D[] { P3D_001, P3D_011, P3D_111, P3D_101 },
// YZ 面
new PointD3D[] { P3D_000, P3D_001, P3D_011, P3D_010 },
new PointD3D[] { P3D_100, P3D_101, P3D_111, P3D_110 },
// ZX 面
new PointD3D[] { P3D_000, P3D_001, P3D_101, P3D_100 },
new PointD3D[] { P3D_010, P3D_011, P3D_111, P3D_110 },
// X 棱
new PointD3D[] { P3D_000, P3D_100 },
new PointD3D[] { P3D_010, P3D_110 },
new PointD3D[] { P3D_001, P3D_101 },
new PointD3D[] { P3D_011, P3D_111 },
// Y 棱
new PointD3D[] { P3D_000, P3D_010 },
new PointD3D[] { P3D_100, P3D_110 },
new PointD3D[] { P3D_001, P3D_011 },
new PointD3D[] { P3D_101, P3D_111 },
// Z 棱
new PointD3D[] { P3D_000, P3D_001 },
new PointD3D[] { P3D_100, P3D_101 },
new PointD3D[] { P3D_010, P3D_011 },
new PointD3D[] { P3D_110, P3D_111 }
};
PointF[][] Element2D = new PointF[][]
{
// XY 面
new PointF[] { P_000, P_010, P_110, P_100 },
new PointF[] { P_001, P_011, P_111, P_101 },
// YZ 面
new PointF[] { P_000, P_001, P_011, P_010 },
new PointF[] { P_100, P_101, P_111, P_110 },
// ZX 面
new PointF[] { P_000, P_001, P_101, P_100 },
new PointF[] { P_010, P_011, P_111, P_110 },
// X 棱
new PointF[] { P_000, P_100 },
new PointF[] { P_010, P_110 },
new PointF[] { P_001, P_101 },
new PointF[] { P_011, P_111 },
// Y 棱
new PointF[] { P_000, P_010 },
new PointF[] { P_100, P_110 },
new PointF[] { P_001, P_011 },
new PointF[] { P_101, P_111 },
// Z 棱
new PointF[] { P_000, P_001 },
new PointF[] { P_100, P_101 },
new PointF[] { P_010, P_011 },
new PointF[] { P_110, P_111 }
};
//
bool CuboidIsVisible = false;
bool[] ElementVisible = new bool[Element2D.Length];
for (int i = 0; i < Element2D.Length; i++)
{
bool EVisible = false;
foreach (PointF P in Element2D[i])
{
PointD P2D = P;
if (P2D.IsNaNOrInfinity)
{
EVisible = false;
break;
}
else
{
if (Geometry.PointIsVisibleInRectangle(P2D, new RectangleF(new Point(0, 0), bmp.Size)))
{
EVisible = true;
}
}
}
ElementVisible[i] = EVisible;
if (!CuboidIsVisible && EVisible)
{
CuboidIsVisible = true;
}
}
if (!CuboidIsVisible)
{
return(false);
}
else
{
double[] IlluminationIntensity = new double[Element3D.Length];
double Exposure = Math.Max(-2, Math.Min(exposure / 50, 2));
if (illuminationDirection.IsZero)
{
for (int i = 0; i < 6; i++)
{
IlluminationIntensity[i] = Exposure;
}
for (int i = 6; i < Element3D.Length; i++)
{
IlluminationIntensity[i] = Constant.HalfSqrt2 * (Exposure + 1) + (Exposure - 1);
}
}
else
{
PointD3D[] NormalVector = new PointD3D[]
{
// XY 面
_NormalVectorNXY,
_NormalVectorPXY,
// YZ 面
_NormalVectorNYZ,
_NormalVectorPYZ,
// ZX 面
_NormalVectorNZX,
_NormalVectorPZX
};
if (illuminationDirectionIsAfterAffineTransform)
{
PointD3D NewOriginOpposite = PointD3D.Zero.AffineTransformCopy(affineMatrices).Opposite;
for (int i = 0; i < NormalVector.Length; i++)
{
NormalVector[i].AffineTransform(affineMatrices);
NormalVector[i].Offset(NewOriginOpposite);
}
}
double[] Angle = new double[NormalVector.Length];
for (int i = 0; i < NormalVector.Length; i++)
{
Angle[i] = illuminationDirection.AngleFrom(NormalVector[i]);
}
for (int i = 0; i < Angle.Length; i++)
{
double A = Angle[i];
double CosA = Math.Cos(A);
double CosSqrA = CosA * CosA;
double _IlluminationIntensity = (A < Constant.HalfPi ? -CosSqrA : (A > Constant.HalfPi ? CosSqrA : 0));
if (color.A < 255 && A != Constant.HalfPi)
{
double Transmittance = 1 - (double)color.A / 255;
if (A < Constant.HalfPi)
{
_IlluminationIntensity += (Transmittance * Math.Abs(CosA) * CosSqrA);
}
else
{
_IlluminationIntensity -= ((1 - Transmittance) * (1 - Math.Abs(CosA)) * CosSqrA);
}
}
_IlluminationIntensity += Exposure;
IlluminationIntensity[i] = _IlluminationIntensity;
}
for (int i = 6; i < Element3D.Length; i++)
{
double _IlluminationIntensity = 0;
int Num = 0;
for (int j = 0; j < 6; j++)
{
bool Flag = true;
foreach (PointD3D P in Element3D[i])
{
if (!Element3D[j].Contains(P))
{
Flag = false;
break;
}
}
if (Flag)
{
_IlluminationIntensity += IlluminationIntensity[j];
Num++;
}
}
_IlluminationIntensity = Constant.HalfSqrt2 * (_IlluminationIntensity / Num + 1) + (Exposure - 1);
IlluminationIntensity[i] = _IlluminationIntensity;
}
}
for (int i = 0; i < IlluminationIntensity.Length; i++)
{
IlluminationIntensity[i] = Math.Max(-1, Math.Min(IlluminationIntensity[i], 1));
}
//
Color[] ElementColor = new Color[IlluminationIntensity.Length];
for (int i = 0; i < IlluminationIntensity.Length; i++)
{
double _IlluminationIntensity = IlluminationIntensity[i];
if (_IlluminationIntensity == 0)
{
ElementColor[i] = color;
}
else
{
ColorX EColor = color;
if (_IlluminationIntensity < 0)
{
EColor.Lightness_HSL += EColor.Lightness_HSL * _IlluminationIntensity;
}
else
{
EColor.Lightness_HSL += (100 - EColor.Lightness_HSL) * _IlluminationIntensity;
}
ElementColor[i] = EColor.ToColor();
}
}
//
double[] ElementZAvg = new double[Element3D.Length];
for (int i = 0; i < Element3D.Length; i++)
{
PointD3D[] Element = Element3D[i];
double ZAvg = 0;
foreach (PointD3D P in Element)
{
ZAvg += P.Z;
}
ZAvg /= Element.Length;
ElementZAvg[i] = ZAvg;
}
int[] ElementIndex = new int[ElementZAvg.Length];
for (int i = 0; i < ElementZAvg.Length; i++)
{
ElementIndex[i] = i;
}
for (int i = 0; i < ElementZAvg.Length; i++)
{
for (int j = i + 1; j < ElementZAvg.Length; j++)
{
if (ElementZAvg[ElementIndex[i]] < ElementZAvg[ElementIndex[j]] || (ElementZAvg[ElementIndex[i]] <= ElementZAvg[ElementIndex[j]] + edgeWidth && Element2D[ElementIndex[i]].Length < Element2D[ElementIndex[j]].Length))
{
int Temp = ElementIndex[i];
ElementIndex[i] = ElementIndex[j];
ElementIndex[j] = Temp;
}
}
}
//
using (Graphics Grph = Graphics.FromImage(bmp))
{
if (antiAlias)
{
Grph.SmoothingMode = SmoothingMode.AntiAlias;
}
//
for (int i = 0; i < ElementIndex.Length; i++)
{
int EIndex = ElementIndex[i];
if (ElementVisible[EIndex])
{
Color EColor = ElementColor[EIndex];
if (!EColor.IsEmpty && EColor.A > 0)
{
PointF[] Element = Element2D[EIndex];
if (Element.Length >= 3)
{
try
{
using (SolidBrush Br = new SolidBrush(EColor))
{
Grph.FillPolygon(Br, Element);
}
}
catch { }
}
else if (Element.Length == 2)
{
if (edgeWidth > 0)
{
float EdgeWidth = (focalLength == 0 ? edgeWidth : (float)(focalLength / (ElementZAvg[EIndex] - PrjCenter.Z) * edgeWidth));
try
{
Brush Br;
Func <Color, double, int> GetAlpha = (Cr, Z) =>
{
int Alpha;
if (focalLength == 0)
{
Alpha = Cr.A;
}
else
{
if (Z - PrjCenter.Z <= focalLength)
{
Alpha = Cr.A;
}
else
{
Alpha = (int)Math.Max(0, Math.Min(focalLength / (Z - PrjCenter.Z) * Cr.A, 255));
}
}
if (EdgeWidth < 1)
{
Alpha = (int)(Alpha * EdgeWidth);
}
return(Alpha);
};
if (((PointD)Element[0]).DistanceFrom(Element[1]) > 1)
{
int Alpha0 = GetAlpha(EColor, Element3D[EIndex][0].Z), Alpha1 = GetAlpha(EColor, Element3D[EIndex][1].Z);
Br = new LinearGradientBrush(Element[0], Element[1], Color.FromArgb(Alpha0, EColor), Color.FromArgb(Alpha1, EColor));
}
else
{
int Alpha = GetAlpha(EColor, ElementZAvg[EIndex]);
Br = new SolidBrush(Color.FromArgb(Alpha, EColor));
}
using (Pen Pn = new Pen(Br, EdgeWidth))
{
Grph.DrawLines(Pn, Element);
}
if (!(Br is null))
{
Br.Dispose();
}
}
catch { }
}
}
}
}
}
}
//
return(true);
}
}
}
private const string _NegativeMagnitudeOrderCode = "mμnpfazy"; // 千进制负数量级符号。
/// <summary>
/// 返回一个以科学记数法表示数值的字符串。
/// </summary>
/// <param name="value">数值。</param>
/// <param name="significance">有效数字位数，0 表示保留所有有效数字。</param>
/// <param name="useNaturalExpression">是否使用 "m×10^n" 的格式，而不是 "mE+n"。</param>
/// <param name="useMagnitudeOrderCode">对于数量级介于 ±24 的数值，是否使用千进制数量级符号。</param>
/// <param name="unit">单位。</param>
/// <returns>字符串，表示以科学记数法表示的数值。</returns>
public static string GetScientificNotationString(double value, int significance, bool useNaturalExpression, bool useMagnitudeOrderCode, string unit)
{
if (InternalMethod.IsNaNOrInfinity(value))
{
return("N/A");
}
else
{
string part1 = string.Empty, part2 = string.Empty, part3 = string.Empty, part4 = string.Empty;
if (value == 0 || (value > -1E-308 && value < 1E-308))
{
part2 = "0";
part4 = (string.IsNullOrEmpty(unit) ? string.Empty : " " + unit);
}
else
{
int sign = Math.Sign(value);
part1 = (sign < 0 ? "-" : string.Empty);
value = Math.Abs(value);
significance = Math.Max(0, Math.Min(significance, 16));
int exp = (int)Math.Floor(Math.Log10(value));
if (significance > 0)
{
exp -= (significance - 1);
value = Math.Round(value / Math.Pow(10, exp));
}
else
{
value /= Math.Pow(10, exp);
}
while (value >= 10)
{
value /= 10;
exp++;
}
if (useMagnitudeOrderCode)
{
if (exp >= -24 && exp < 27)
{
int mod = 0;
if (exp >= 0)
{
mod = exp % 3;
}
else
{
mod = (-exp) % 3;
if (mod > 0)
{
mod = 3 - mod;
}
}
if (mod > 0)
{
value *= Math.Pow(10, mod);
}
part2 = (significance > 0 ? value.ToString("N" + Math.Max(0, significance - 1 - mod)) : value.ToString());
int mag = 0;
if (exp >= 0)
{
mag = exp / 3;
}
else
{
mag = (exp + 1) / 3 - 1;
}
string magCode = (mag > 0 ? _PositiveMagnitudeOrderCode[mag - 1].ToString() : (mag < 0 ? _NegativeMagnitudeOrderCode[-mag - 1].ToString() : string.Empty));
if (string.IsNullOrEmpty(unit))
{
part3 = magCode;
part4 = string.Empty;
}
else
{
part3 = " " + magCode;
part4 = unit;
}
}
else
{
part2 = (significance > 0 ? value.ToString("N" + Math.Max(0, significance - 1)) : value.ToString());
part3 = (useNaturalExpression ? "×10^" + exp : (exp > 0 ? "E+" + exp : "E" + exp));
part4 = (string.IsNullOrEmpty(unit) ? string.Empty : " " + unit);
}
}
else
{
part2 = (significance > 0 ? value.ToString("N" + Math.Max(0, significance - 1)) : value.ToString());
part3 = (exp == 0 ? string.Empty : (useNaturalExpression ? "×10^" + exp : (exp > 0 ? "E+" + exp : "E" + exp)));
part4 = (string.IsNullOrEmpty(unit) ? string.Empty : " " + unit);
}
}
return(string.Concat(part1, part2, part3, part4));
}
}
