/// <summary>
/// 设置平移的初态
/// </summary>
/// <param name="length">待平移的线的长度</param>
/// <param name="distance">待平移的距离</param>
public static void SetTranslationStartState(int length, int distance)
{
TranslationLinelength = length;
TranslationDistance = distance;
StraitLineAlgo.DrawStraitLineDDA(new pointLoc(0, 0), new pointLoc(0, length));
}
/// <summary>
/// 开始平移
/// </summary>
public static void BeginTranslation()
{
for (int i = 0; i < TranslationDistance; i++)
{
CSys.RefreshCordinateSys();
StraitLineAlgo.DrawStraitLineDDA(new pointLoc(i + 1, 0), new pointLoc(i + 1, TranslationLinelength));
CSys.DrawDots();
}
}
/// <summary>
/// 顶点画三角形法。此方法画出的三角形边长比需得到的底边略长。
/// </summary>
/// <param name="edgeLength">待画的三角形边长</param>
/// <param name="Sx">顶点横坐标</param>
/// <param name="Sy">顶点横坐标</param>
private static void RegularTriangleFixedTopPoint(double edgeLength, double Sx, double Sy)
{
double length = Math.Round(edgeLength); //得到最接近输入边长的近似边长
double x1, y1, x2, y2; //x1,y1是左侧点的横纵坐标值，x2,y2是右侧点的横纵坐标值。左右是相对于正三角形顶点而言的
x1 = Math.Round(Sx - length / 2); //计算另外两个点的坐标,并将其转换为最接近的整数坐标值
y1 = Math.Round(Sy + Math.Sqrt(3) * length / 2);
x2 = Math.Round(Sx + length / 2);
y2 = Math.Round(Sy + Math.Sqrt(3) * length / 2);
StraitLineAlgo.DrawStraitLineDDA(Sx, Sy, x1, y1);//逆时针方向连接三点
StraitLineAlgo.DrawStraitLineDDA(x1, y1, x2, y2);
StraitLineAlgo.DrawStraitLineDDA(x2, y2, Sx, Sy);
}
/// <summary>
/// 固定底边画三角形法。
/// </summary>
/// <param name="edgeLength">待画的三角形边长</param>
/// <param name="Sx">底边左端定点横坐标</param>
/// <param name="Sy">底边左端定点纵坐标</param>
private static void RegularTriangleFixedBottomEdge(double edgeLength, double Sx, double Sy)
{
double length = Math.Round(edgeLength); //得到最接近输入边长的近似边长
double x0, y0, x2, y2; //x0,y0是顶点的横纵坐标值，x2,y2是右侧顶点的横纵坐标值。左右是相对于正三角形顶点而言的
x0 = Math.Round(Sx + length / 2); //计算另外两个点的坐标,并将其转换为最接近的整数坐标值
y0 = Math.Round(Sy - Math.Sqrt(3) * length / 2);
x2 = Math.Round(Sx + length);
y2 = Sy;
StraitLineAlgo.DrawStraitLineDDA(Sx, Sy, x2, y2);//逆时针方向连接三点
StraitLineAlgo.DrawStraitLineDDA(x2, y2, x0, y0);
StraitLineAlgo.DrawStraitLineDDA(x0, y0, Sx, Sy);
}
/// <summary>
/// 画任意个定点的多边形
/// </summary>
/// <param name="pointLoc">存储了多个定点信息的pointLoc型数组</param>
public static void CreateGenericPolygon(pointLoc[] pointLocArr)
{
int polyNum = pointLocArr.Length;//顶点数
//连接各个点
for (int i = 0; i < pointLocArr.Length; i++)
{
if (i + 1 < pointLocArr.Length)
{
StraitLineAlgo.DrawStraitLineDDA(pointLocArr[i], pointLocArr[i + 1]);
}
else
{
StraitLineAlgo.DrawStraitLineDDA(pointLocArr[i], pointLocArr[0]);//闭合首尾
}
}
}