From a609bd9b56600b720a22f0c79b891ff91d0bc234 Mon Sep 17 00:00:00 2001 From: Sam Lantinga Date: Fri, 27 Nov 2009 19:29:27 +0000 Subject: [PATCH] Joe 2009-11-23 21:31:10 PST If type is ::SDL_HAPTIC_CARTESIAN, direction is encoded by three positions 367 * (X axis, Y axis and Z axis (with 3 axes)). ::SDL_HAPTIC_CARTESIAN uses 368 * the first three \c dir parameters. The cardinal directions would be: 369 * - North: 0,-1, 0 370 * - East: -1, 0, 0 371 * - South: 0, 1, 0 372 * - West: 1, 0, 0 typedef struct SDL_HapticDirection { Uint8 type; /**< The type of encoding. */ Uint16 dir[3]; /**< The encoded direction. */ } SDL_HapticDirection; An unsigned int can't store negative values and I don't see an alternate way to encode them in the docs or source. The best I have been able to come up with is using a negative magnitude for the effect but this will only get me 2 of the 4 quadrants in the plane for 2d effects. I looked at the win32 and linux implementations and I believe is is safe to use signed ints in the direction struct. I am unfamiliar with the darwin haptics API so I don't know if it is safe. --- include/SDL_haptic.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/SDL_haptic.h b/include/SDL_haptic.h index 5ad165d45..52f33f152 100644 --- a/include/SDL_haptic.h +++ b/include/SDL_haptic.h @@ -411,7 +411,7 @@ typedef struct _SDL_Haptic SDL_Haptic; typedef struct SDL_HapticDirection { Uint8 type; /**< The type of encoding. */ - Uint16 dir[3]; /**< The encoded direction. */ + Sint32 dir[3]; /**< The encoded direction. */ } SDL_HapticDirection;