请用opencvsharp编写 初定义圆心、半径,将圆分成360等分,从外到内,找出圆与法线交点 编写函数
时间: 2024-01-16 17:04:39 浏览: 160
好的,我会为您编写这个函数。以下是用C#和OpenCVSharp库的代码实现:
```csharp
using OpenCvSharp;
public static Point[] GetCirclePoints(Point center, int radius)
{
Point[] points = new Point[360];
double angle = 0.0;
double angleStep = Math.PI / 180.0;
for (int i = 0; i < 360; i++)
{
int x = (int)(center.X + radius * Math.Cos(angle));
int y = (int)(center.Y + radius * Math.Sin(angle));
points[i] = new Point(x, y);
angle += angleStep;
}
return points;
}
public static Point[] GetCircleNormalIntersections(Point center, int radius)
{
Point[] circlePoints = GetCirclePoints(center, radius);
Point[] intersections = new Point[360];
for (int i = 0; i < 360; i++)
{
Point p1 = circlePoints[i];
Point p2 = circlePoints[(i + 90) % 360]; // 90 degrees is the normal
double a1 = p2.Y - p1.Y;
double b1 = p1.X - p2.X;
double c1 = a1 * p1.X + b1 * p1.Y;
double a2 = center.X - p1.X;
double b2 = center.Y - p1.Y;
double det = a1 * b2 - a2 * b1;
if (det != 0) // Lines are not parallel
{
double x = (b2 * c1 - b1 * (a2 * center.X + b2 * center.Y)) / det;
double y = (a1 * (a2 * center.X + b2 * center.Y) - a2 * c1) / det;
intersections[i] = new Point((int)x, (int)y);
}
else // Lines are parallel, no intersection
{
intersections[i] = new Point(-1, -1);
}
}
return intersections;
}
```
`GetCirclePoints`函数接受圆心坐标和半径作为参数,并返回一个包含360个点的数组,这些点是圆周上均匀分布的点。我们使用角度步长来计算每个点的位置。然后,`GetCircleNormalIntersections`函数使用`GetCirclePoints`函数获取圆周上的点,并计算每个点与法线的交点。我们使用线性方程组求解来计算交点。如果两条线是平行的,则没有交点。在这种情况下,我们将交点设置为(-1, -1)。最后,该函数返回一个包含360个交点的数组。
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