像素级别的多边形碰撞

boolean isCollisionPolygon(int[] xPoints, int[] yPoints, int posx, int posy) {int i, j;int y;int miny, maxy;int x1, y1;int x2, y2;int ind1, ind2;int ints;int[] polyInts;int nPoints &＃61; xPoints.length;if (nPoints <3) {return false;}polyInts &＃61; new int[nPoints];miny &＃61; yPoints[0];maxy &＃61; yPoints[0];for (i &＃61; 1; i maxy) {maxy &＃61; yPoints[i];}}for (y &＃61; miny; y <&＃61; maxy; y&＃43;&＃43;) {ints &＃61; 0;for (i &＃61; 0; i y2) {y2 &＃61; yPoints[ind1];y1 &＃61; yPoints[ind2];x2 &＃61; xPoints[ind1];x1 &＃61; xPoints[ind2];}else {continue;}if ( (y >&＃61; y1) && (y y1) && (y <&＃61; y2)) {polyInts[ints&＃43;&＃43;] &＃61; (y - y1) * (x2 - x1) / (y2 - y1) &＃43; x1;}}for (i &＃61; polyInts.length; --i >&＃61; 0; ) {for (j &＃61; 0; j polyInts[j &＃43; 1]) {int T &＃61; polyInts[j];polyInts[j] &＃61; polyInts[j &＃43; 1];polyInts[j &＃43; 1] &＃61; T;}}}for (i &＃61; 0; i &＃61; polyInts[i] && posx <&＃61; polyInts[i &＃43; 1]) {return true;}}}}return false;}

boolean isCollisionPolygon(int[] xPoints, int[] yPoints, int posx, int posy)
使用方法.
xPoints,是多边形的X坐标,yPoints是Y坐标
posx,posy是那个要检测点的坐标