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comparison src/haptic/linux/SDL_syshaptic.c @ 2523:366d84fdf8d1 gsoc2008_force_feedback

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Haptic subsystem handles haptic axes now. Support for SDL_HAPTIC_SPHERICAL on linux. More error checking. Improved documentation. Added missing SDLCALLs to SDL_haptic.h.
author Edgar Simo <bobbens@gmail.com>
date Thu, 17 Jul 2008 11:47:48 +0000
parents af9df9662807
children 1a55848ce198
comparison
equal deleted inserted replaced
2522:0877146be013 2523:366d84fdf8d1
253 SDL_memset(haptic->hwdata, 0, sizeof(*haptic->hwdata)); 253 SDL_memset(haptic->hwdata, 0, sizeof(*haptic->hwdata));
254 254
255 /* Set the data */ 255 /* Set the data */
256 haptic->hwdata->fd = fd; 256 haptic->hwdata->fd = fd;
257 haptic->supported = EV_IsHaptic(fd); 257 haptic->supported = EV_IsHaptic(fd);
258 haptic->naxes = 2; /* Hardcoded for now, not sure if it's possible to find out. */
258 259
259 /* Set the effects */ 260 /* Set the effects */
260 if (ioctl(fd, EVIOCGEFFECTS, &haptic->neffects) < 0) { 261 if (ioctl(fd, EVIOCGEFFECTS, &haptic->neffects) < 0) {
261 SDL_SetError("Haptic: Unable to query device memory: %s", strerror(errno)); 262 SDL_SetError("Haptic: Unable to query device memory: %s", strerror(errno));
262 goto open_err; 263 goto open_err;
417 switch (dir->type) { 418 switch (dir->type) {
418 case SDL_HAPTIC_POLAR: 419 case SDL_HAPTIC_POLAR:
419 /* Linux directions are inverted. */ 420 /* Linux directions are inverted. */
420 tmp = (((18000 + dir->dir[0]) % 36000) * 0xFFFF) / 36000; 421 tmp = (((18000 + dir->dir[0]) % 36000) * 0xFFFF) / 36000;
421 return (Uint16) tmp; 422 return (Uint16) tmp;
423
422 case SDL_HAPTIC_CARTESIAN: 424 case SDL_HAPTIC_CARTESIAN:
423 /* We must invert "x" and "y" to go clockwise. */ 425 /* We must invert "x" and "y" to go clockwise. */
424 f = atan2(dir->dir[0], dir->dir[1]); 426 f = atan2(dir->dir[0], dir->dir[1]);
425 tmp = (int)(f*18000./M_PI) % 36000; 427 tmp = (int)(f*18000./M_PI) % 36000;
426 tmp = (tmp * 0xFFFF) / 36000; 428 tmp = (tmp * 0xFFFF) / 36000;
427 return (Uint16) tmp; 429 return (Uint16) tmp;
428 430
431 case SDL_HAPTIC_SPHERICAL:
432 tmp = (36000 - dir->dir[0]) + 27000; /* Convert to polars */
433 tmp = (((18000 + tmp) % 36000) * 0xFFFF) / 36000;
434 return (Uint16) tmp;
435
429 default: 436 default:
437 SDL_SetError("Haptic: Unsupported direction type.");
430 return -1; 438 return -1;
431 } 439 }
432 440
433 return 0; 441 return 0;
434 } 442 }
454 constant = &src->constant; 462 constant = &src->constant;
455 463
456 /* Header */ 464 /* Header */
457 dest->type = FF_CONSTANT; 465 dest->type = FF_CONSTANT;
458 dest->direction = SDL_SYS_ToDirection(&constant->direction); 466 dest->direction = SDL_SYS_ToDirection(&constant->direction);
467 if (dest->direction < 0) return -1;
459 468
460 /* Replay */ 469 /* Replay */
461 dest->replay.length = CLAMP(constant->length); 470 dest->replay.length = CLAMP(constant->length);
462 dest->replay.delay = CLAMP(constant->delay); 471 dest->replay.delay = CLAMP(constant->delay);
463 472
484 periodic = &src->periodic; 493 periodic = &src->periodic;
485 494
486 /* Header */ 495 /* Header */
487 dest->type = FF_PERIODIC; 496 dest->type = FF_PERIODIC;
488 dest->direction = SDL_SYS_ToDirection(&periodic->direction); 497 dest->direction = SDL_SYS_ToDirection(&periodic->direction);
498 if (dest->direction < 0) return -1;
489 499
490 /* Replay */ 500 /* Replay */
491 dest->replay.length = CLAMP(periodic->length); 501 dest->replay.length = CLAMP(periodic->length);
492 dest->replay.delay = CLAMP(periodic->delay); 502 dest->replay.delay = CLAMP(periodic->delay);
493 503
566 ramp = &src->ramp; 576 ramp = &src->ramp;
567 577
568 /* Header */ 578 /* Header */
569 dest->type = FF_RAMP; 579 dest->type = FF_RAMP;
570 dest->direction = SDL_SYS_ToDirection(&ramp->direction); 580 dest->direction = SDL_SYS_ToDirection(&ramp->direction);
581 if (dest->direction < 0) return -1;
571 582
572 /* Replay */ 583 /* Replay */
573 dest->replay.length = CLAMP(ramp->length); 584 dest->replay.length = CLAMP(ramp->length);
574 dest->replay.delay = CLAMP(ramp->delay); 585 dest->replay.delay = CLAMP(ramp->delay);
575 586