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我想根据控制点列表绘制曲线。 这是我所期待的: 如何根据3点以上的控制点列表绘制曲线
这里是控制点: (0,90) (1100) (-3,145) (10150) (23155) (73108) (80,120) (86131) (40210) (50220) (60230) (148185) (140180) (131175) (23188) (0190)
这里是我的代码:
public List<PointType> controlPoints;
public void render(Canvas canvas, Paint paint) {
int size = controlPoints.size();
if (size < 2) {
return;
}
paint.setColor(this.color);
paint.setStyle(this.style);
Path curvePath = new Path();
PointType firstPoint = null;
PointType beginPoint = null;
for (PointType point : controlPoints) {
if (firstPoint == null) {
firstPoint = point;
} else if (beginPoint == null) {
beginPoint = point;
} else {
curvePath.moveTo(firstPoint.x, firstPoint.y);
curvePath.quadTo(beginPoint.x, beginPoint.y, point.x, point.y);
firstPoint = beginPoint;
beginPoint = point;
}
}
canvas.drawPath(curvePath, paint);
}
但结果是这样的:
什么是错的,我怎么能得出正确的曲线?
看到http://stackoverflow.com/a/3813349/794088 – petey
你需要平滑的曲线出来,用线总是会接近它类似的东西。看看贝塞尔样条作为第一次尝试 –
https://github.com/autotrace也许你可以从这个链接拿东西..看起来你需要更多的点,因为它画直线... – Setar