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POSimulating movement of a window and have it react to collisions
 

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  1. POSimulating movement of a window and have it react to collisions
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    <p>I was reading this <a href="https://stackoverflow.com/questions/932706/how-to-programmatically-move-a-window-slowly-as-if-the-user-were-doing-it">topic</a> and I decided to give it a shot. To my astonishment it really seemed easier than what I am making it I guess. I have some confusion about the "DesiredPos" variable. Well at least in my implementation. I am trying to move a window around constantly and have it react like a ball when it hits the monitors edges. Like the ball in the game Pong. I have made programs like this that move the mouse, But I can't seem to get my head around this one. </p> <p>This is what I have so far, I have limited experience when it comes to a lot of functions in the Windows API. Keep in mind this is a hardcore rough draft.</p> <p>EDIT I haven't implemented any of the collision detection yet I just wanted to get the moving portion working.</p> <pre><code>#include &lt;windows.h&gt; #include &lt;math.h&gt; int newX(int oldx); int newY(int oldy); double SmoothMoveELX(double x); int main() { int lengthInMs = 10*1000; HWND notepad = FindWindow("Notepad",NULL); RECT window; SetTimer( notepad, NULL, 30, (TIMERPROC)NULL ); int startTime = GetTickCount(); int pos = elap / lengthInMs; while(1) { RECT window; GetWindowRect(notepad,&amp;window); int elap = (GetTickCount() - startTime); if(elap &gt;= lengthInMs) { int NEWX = NewX(window.x); int NEWY = NewY(window.y); MoveWindow( notepad, NEWX, NEWY, 100, 100, TRUE ); } } } int NewX(int oldx) { int newx = oldx*(1-SmoothMoveELX(pos)) + 10 *SmoothMoveELX(pos)); return newx; } int newY(int oldy) { int newy = oldy*(1-SmoothMoveELX(pos)) + 10 *SmoothMoveELX(pos)); return newy; } double SmoothMoveELX(double x) { double PI = Atan(1) * 4; return ((cos(1 - x) * PI + 1) /2 ) } </code></pre>
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