SDK mouse relative motion, weird results
- by zaftcoAgeiha
I have a simple SDL application that tracks the relative change in mouse position
But for some reason, the motion.xrel and motion.yrel give back massive numbers!
my code:
SDL_WM_GrabInput(SDL_GRAB_ON);
SDL_ShowCursor(false);
while(!quit){
// Draw the scene
if (invalidated == 1){
on_render();
invalidated = 0;
}
// And poll for events
SDL_PumpEvents();
SDL_Event event;
while ( SDL_PollEvent(&event) ) {
switch (event.type) {
case SDL_KEYDOWN:
case SDL_KEYUP:
on_key(event.key);
break;
case SDL_MOUSEMOTION:
std::cerr << event.motion.xrel << ":" << event.motion.yrel << std::endl;
invalidated = 1;
break;
...
and the printed results are ridiculous:
400:300
-11297:1705
-11215:1268
-10969:940
-10314:-43
-9986:-698
-9331:-1681
-9003:-2227
-8593:-2664
-8020:-3538
-7774:-3647
-7365:-4193
-7283:-4302
-7119:0
any idea why?? System is Ubuntu 12 running in virtual box