我想要做的是從Java繪製一個多邊形到一個直接的2d C++窗口。我有2個包含多邊形的x點和y點的數組。打印數組時,除了兩個數組中的第一個元素外,數組顯示正確。JNI jintArray的第一個值不正確
在Java方面:
Polygon fillPoly = new Polygon(new int[] {200, 250, 300}, new int[] {400, 350, 400}, 3);
// 200, 400 | 250, 350 | 300, 400
g.fillPolygon(fillPoly);
//...
public void fillPolygon(final Polygon polygon) {
fillPoly(polygon.xpoints, polygon.ypoints, polygon.npoints);
}
private native void fillPoly(final int[] xpoints, final int ypoints[], final int numPoints);
但在data
字符串輸出是一樣的東西:
start: 693635144, 693771992 | Path: 693635144, 693771992 - 0, 0 - 718079568, 693635144 - | numPoints: 3
start: 35, 29 | Path: 35, 29 - 250, 350 - 300, 400 - | numPoints: 3
start: 35, 32 | Path: 35, 32 - 250, 350 - 300, 400 - | numPoints: 3
start: 35, -1437401059 | Path: 35, -1437401059 - 250, 4 - 300, 2949120 - | numPoints: 3
start: 35, 39573896 | Path: 35, 39573896 - 250, 1 - 300, 0 - | numPoints: 3
start: 47, 44 | Path: 47, 44 - 250, 350 - 300, 400 - | numPoints: 3
start: 53, 47 | Path: 53, 47 - 250, 350 - 300, 400 - | numPoints: 3
start: 53, 39589128 | Path: 53, 39589128 - 250, 1 - 300, 0 - | numPoints: 3
start: 56, 53 | Path: 56, 53 - 250, 350 - 300, 400 - | numPoints: 3
start: 56, 50 | Path: 56, 50 - 250, 350 - 300, 400 - | numPoints: 3
start: 39591176, 39591176 | Path: 39591176, 39591176 - 1, 12 - 99607256, 0 - | numPoints: 3
start: 71, 59 | Path: 71, 59 - 250, 350 - 300, 400 - | numPoints: 3
start: 71, 68 | Path: 71, 68 - 250, 350 - 300, 400 - | numPoints: 3
如果我自己提供它的工作點,但不與jintArrays
。如何正確檢索jint*
的int值並從中創建D2D1::Point2F
?
在本地代碼中有什麼'xpoints'和'ypoints'?我可以看到'xpoint' /'ypoint'和'jxpoints' /'jypoints'是什麼,但是我沒有看到'xpoints' /'ypoints'在任何地方被聲明。 – Michael
我添加了標題信息 – MircoProgram
我仍然看不到'xpoints'和'ypoints'在你顯示的C++代碼中的任何地方被聲明。 – Michael