如何使用 JavaFX 创建三角形？
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How do I create a triangle using JavaFX?
提问by Malik
How can I create a triangle using JavaFX? I have already tried these but I don't know how to fix it exactly :
如何使用 JavaFX 创建三角形？我已经尝试过这些，但我不知道如何准确修复它：
Polygon triangle = new Polygon();
triangle.getPoints().setAll(
50, 50,
60, 60,
20, 40
);
采纳答案by ΦXoc? ? Пepeúpa ツ
Replace triangle.getPoints().setAll.. with triangle.getPoints().addAll(
将triangle.getPoints().setAll..替换 为triangle.getPoints().addAll(
Explanation:
解释：
You are adding 3 points, the x0=50,y0=50 then the x0=60,y0=60 and then x0=20,y0=40, those are the vertices of the triangle...
您要添加 3 个点，x0=50,y0=50 然后 x0=60,y0=60 然后 x0=20,y0=40，这些是三角形的顶点...
this represents a triangle like this (Be careful of not plotting a line or a weird figure)
这代表一个像这样的三角形（小心不要绘制一条线或一个奇怪的图形）
The following snippet will generate a polygon like the image below.
以下代码段将生成如下图所示的多边形。
public class Main extends Application {
@Override
public void start(Stage stage) {
Group root = new Group();
Scene scene = new Scene(root, 260, 80);
stage.setScene(scene);
Group g = new Group();
Polygon polygon = new Polygon();
polygon.getPoints().addAll(new Double[]{
0.0, 0.0,
20.0, 10.0,
10.0, 20.0 });
g.getChildren().add(polygon);
scene.setRoot(g);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
回答by iboisver
From the Javadoc for Polygon:
Polygon polygon = new Polygon();
polygon.getPoints().addAll(new Double[]{
0.0, 0.0,
20.0, 10.0,
10.0, 20.0 });
It looks like you are missing the new Double[] {...}
看起来你错过了 new Double[] {...}
