创建于Java 2D的复合形状 [英] Creating a composite Shape in Java 2D
问题描述
使用Java 2D我修补一些贝塞尔曲线（的CubicCurve2D ）共同打造的斑点。我现在面临的问题是如何：
Using Java 2D I've patched several Bezier curves (CubicCurve2D) together to create a "blob". The problem I now face is how to:
- 在有效地填充与给定的颜色的斑点。
- 在有效地确定一个给定的点是否在BLOB中。
我注意到THST 的CubicCurve2D 工具图形它提供了大量的包含方法确定insideness和的Graphics2D 可以通过<$ C $三来一补一图形 >填充（形状）（我相信使用图形的的getPathIterator 方法做本）。
I noticed thst CubicCurve2D implements Shape which provides numerous contains methods for determining "insideness" and that Graphics2D is able to fill a Shape via the fill(Shape) (which I believe uses Shape's getPathIterator methods to do this).
鉴于这一点，我希望我能创造一个复合图形，因此我的getPathIterator（的AffineTransform）方法只会链接底层的PathIterator 取值在一起。然而，这是产生 NoSuchElementException异常一旦我的形状包含多个的CubicCurve2D 。即使我不管理，以实现这一目标，我不相信它会正常运行，因为的CubicCurve2D 总是充满凸侧，和我的斑点是由凹凸曲线。 包含问题更是难上加难作为一个点可以合法地趴在BLOB内，但不是在任何个人曲线。
Given this I was hoping I could create a composite Shape, whereby my getPathIterator(AffineTransform) method would simply link the underlying PathIterators together. However, this is producing a NoSuchElementException once my shape contains more than one CubicCurve2D. Even if I do manage to achieve this I'm not convinced it will work as expected because a CubicCurve2D is always filled on the convex side, and my "blob" is composed of concave and convex curves. The "contains" problem is even harder as a point can legitimately lie within the blob but not within any of the individual curves.
- 我在正确的方式处理这个问题（试图实施
图形？）还是有一个惯用的方式，我不知道这样做呢？我本来以为合成几何形状的问题，将是相当普遍的。 - 有没有人有关于如何解决这个问题？ 任何建议
- Am I approaching this problem in the correct way (trying to implement
Shape?) or is there an idiomatic way to do this that I'm unaware of? I would have thought that the problem of compositing geometric shapes would be fairly common. - Does anyone have any suggestions regarding how to solve this problem?
在此先感谢。
推荐答案
我不知道我理解你的问题，但是的复合形状的可以与类的爪哇/ AWT / GEOM /地区。
I'm not sure I understand your question but composite shapes can be created with the class java/awt/geom/Area.
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