按照轨迹运动如何实现

[jsqinyinghao]

我准备做一个c++的项目。项目中，使用鼠标绘制一条运动线路，保存下来。然后用一个点，按照这个线路轨迹，从头移动到结尾处。请问有什么样的合适的方法？这个轨迹如何保存，如果轨迹可以交汇又怎么保存 移动的方法是什么

[cain-won]

mark一下，你这个问题难度不小

[赵4老师]

MSDN98_1.ISO http://pan.baidu.com/s/1dDF41ix, MSDN98_2.ISO http://pan.baidu.com/s/1bnGo0Vl 先下载安装MSDN98 再参考： MSDN98\SAMPLES\VC98\MFC\TUTORIAL\SCRIBBLE\STEP1～7\*.* 和 LineDDA The LineDDA function determines which pixels should be highlighted for a line defined by the specified starting and ending points. BOOL LineDDA( int nXStart, // x-coordinate of line's starting point int nYStart, // y-coordinate of line's starting point int nXEnd, // x-coordinate of line's ending point int nYEnd, // y-coordinate of line's ending point LINEDDAPROC lpLineFunc, // pointer to callback function LPARAM lpData // pointer to application-defined data ); Parameters nXStart Specifies the x-coordinate of the line's starting point. nYStart Specifies the y-coordinate of the line's starting point. nXEnd Specifies the x-coordinate of the line's ending point. nYEnd Specifies the y-coordinate of the line's ending point. lpLineFunc Pointer to an application-defined callback function. For more information, see the LineDDAProc callback function. lpData Pointer to the application-defined data. Return Values If the function succeeds, the return value is nonzero. If the function fails, the return value is zero. Windows NT: To get extended error information, callGetLastError. Remarks The LineDDA function passes the coordinates for each point along the line, except for the line's ending point, to the application-defined callback function. In addition to passing the coordinates of a point, this function passes any existing application-defined data. The coordinates passed to the callback function match pixels on a video display only if the default transformations and mapping modes are used. QuickInfo Windows NT: Requires version 3.1 or later. Windows: Requires Windows 95 or later. Windows CE: Unsupported. Header: Declared in wingdi.h. Import Library: Use gdi32.lib. See Also Lines and Curves Overview, Line and Curve Functions, LineDDAProc

[幻夢之葉]

WIN32开发 响应MouseMove， MouseDown，MouseUp等消息分别保存轨迹坐标和起始点 之后重绘，显示运动的点。速度控制那块可以计算全路径的长度/设定的时间，每时刻的点的位置也可以求出来

[幻夢之葉]

绘制线是MoveTo和LineTo等Win32函数

[真相重于对错]

前几天翻看高中数学，其中提到 3个函数的表示方法 1、公式法 2、图形法 3、数据列表法

[shiter]

轨迹保存主要使用点和时间，这样就是一个运动的数据结构了吧