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7f23d71b6a
This function is useful for accumulating relative mouse motion if you want to only handle whole pixel movement.
e.g.
static float dx_frac, dy_frac;
float dx, dy;
/* Accumulate new motion with previous sub-pixel motion */
dx = event.motion.xrel + dx_frac;
dy = event.motion.yrel + dy_frac;
/* Split the integral and fractional motion, dx and dy will contain whole pixel deltas */
dx_frac = SDL_modff(dx, &dx);
dy_frac = SDL_modff(dy, &dy);
if (dx != 0.0f || dy != 0.0f) {
...
}
23 lines
2.3 KiB
Plaintext
23 lines
2.3 KiB
Plaintext
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This is a list of major changes in SDL's version history.
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---------------------------------------------------------------------------
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3.2.0:
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---------------------------------------------------------------------------
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General:
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* SDL headers should now be included as `#include <SDL3/SDL.h>`
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* Many functions and symbols have changed since SDL 2.0, see the [migration guide](docs/README-migration.md) for details
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* The preprocessor symbol __MACOSX__ has been renamed __MACOS__
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* The preprocessor symbol __IPHONEOS__ has been renamed __IOS__
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* SDL_stdinc.h no longer includes stdio.h, stdlib.h, etc., it only provides the SDL C runtime functionality
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* Added SDL_CreateSurface() and SDL_CreateSurfaceFrom() which replace SDL_CreateRGBSurface*(), and can also be used to create YUV surfaces
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* Added SDL_HasJoysticks(), SDL_GetJoysticks(), SDL_GetJoystickInstanceName(), SDL_GetJoystickInstancePath(), SDL_GetJoystickInstancePlayerIndex(), SDL_GetJoystickInstanceGUID(), SDL_GetJoystickInstanceVendor(), SDL_GetJoystickInstanceProduct(), SDL_GetJoystickInstanceProductVersion(), and SDL_GetJoystickInstanceType() to directly query the list of available joysticks
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* Added SDL_HasGamepads(), SDL_GetGamepads(), SDL_GetGamepadInstanceName(), SDL_GetGamepadInstancePath(), SDL_GetGamepadInstancePlayerIndex(), SDL_GetGamepadInstanceGUID(), SDL_GetGamepadInstanceVendor(), SDL_GetGamepadInstanceProduct(), SDL_GetGamepadInstanceProductVersion(), and SDL_GetGamepadInstanceType() to directly query the list of available gamepads
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* Added SDL_HasSensors(), SDL_GetSensors(), SDL_GetSensorInstanceName(), SDL_GetSensorInstanceType(), and SDL_GetSensorInstanceNonPortableType() to directly query the list of available sensors
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* SDL_GetTicks() now returns a 64-bit value and the tick values should be directly compared instead of using the SDL_TICKS_PASSED macro
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* Added SDL_GetTicksNS() to return the number of nanoseconds since the SDL library initialized
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* Added SDL_DelayNS() to specify a delay in nanoseconds, to the highest precision the system will support
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* The timestamp member of the SDL_Event structure is now in nanoseconds, filled in with the time the event was generated, or the time it was queued if that's not available
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* Added SDL_modf() and SDL_modff() to separate the whole and fractional portions of a floating point number
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