Use the Physics Engine (Compact 7)

3/12/2014

The following example code shows how the default gesture handler uses the physics engine to process scroll gestures.

#include “physicsengine.h” // under public\common\oak\inc
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case GID_SCROLL: 
    ProcessFlick((int)GID_SCROLL_VELOCITY(pGestureInfo->ullArguments), 
       (int)GID_SCROLL_ANGLE(pGestureInfo->ullArguments) ); 
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HPHYSICSENGINE hPE; 
ProcessFlick(TransitionSpeed, TransitionAngle) 
{ 
     PHYSICSENGINEINIT initState; // fill initState with effect desire 
     CreatePhysicsEngine(&initState, &hPE); 
     SetTimer(NULL, NULL, GESTURE_ANIMATION_FRAME_DELAY_MS,
       AnimationProc); 
} 

AnimationProc() 
{ 
     PHYSICSENGINESTATE state = {sizeof(state)}; 
     QueryPhysicsEngine(hPE, &state); 
     // Scroll to state.ptPosition.x and state.ptPosition.y 
}
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DestroyPhysicsEngine(hPE);

See Also

Concepts

Physics Engine