如何根据与之碰撞的路径旋转拍子

如何解决如何根据与之碰撞的路径旋转拍子

我想在我的绘图应用程序中应用物理，即使用自定义画布进行绘图，我想做什么：假设有两个rect，rect_a和rect_b，假设用户用手指移动rect_a（我通过应用偏移到路径），并在一段时间后rect_a与rect_b碰撞（按区域检查碰撞），现在我想要的是rect_b应该以与rect_a正在移动的偏移相同的偏移量移动（即我已成功执行此操作），因此rect_b和rect_a永不重叠彼此并且rect_b也应该相对于rect_a方向旋转（我做过一切，但是失败了，如果path是未旋转的矩形，则旋转仅在正向发生，如果我旋转矩形路径，则旋转将是wron ），有人明白我的意思吗？我想要的是像现实生活中那样的推动力，假设某个地方有两个东西在我推动第一个与第二个碰撞时推动它，第二个在现实生活中也将向前移动并旋转，这是我想要实现的，我尝试了一切，但失败了， 我要如何旋转，请参见以下代码。

//rectf is the path which is being moving by user through finger
PointF pointCMoving =  new PointF(rectF.centerX(),rectF.centerY());
//rectf1 is the second path to which path 1(rectf) collides.
PointF pointCMove =  new PointF(rectF1.centerX(),rectF1.centerY());
//getting the angle between rect1,and rect2 through their center points
double an = angleOf(pointCMoving,pointCMove);
boolean rotation = false;
Matrix matrix = new Matrix();
//dividing path in to 8 quadric  (360/45) 
//assuming 0-45 collide from left side,45-90 collide from top left side and 
so on
//rotatepathvalue = 1 means matrix will rotate on right side and -1 means 
//matrix will rotate on left side


                    if(an >10 && an <= 45){
                        rotatePathValue = 1;
                        rotation = true;
                    }
                    if(an >55 && an <= 85){
                        rotatePathValue = -1;
                        rotation = true;
                    }
                    if(an > 100 && an <= 135){

                        rotatePathValue = 1;
                        rotation = true;
                    }
                    if(an >135 && an <= 175){
                        rotatePathValue = -1;
                        rotation = true;
                    }
                    if(an > 180 && an <= 220){
                        rotatePathValue = 1;
                        rotation = true;
                    }
                    if(an > 225 && an <= 270){
                        rotatePathValue = -1;
                        rotation = true;
                    }
                    if(an > 270 && an <= 315){
                        rotatePathValue = 1;
                        rotation = true;

                    }
                    if(an > 315 && an <= 355){
                        rotatePathValue = -1;
                        rotation = true;

                    }
                    if(rotation){
                        matrix.postRotate(rotatePathValue,rectF1.centerX(),rectF1.centerY());
                        movepath.transform(matrix);
                        matrix.mapRect(rectF1);
                    }