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comparison src/haptic/linux/SDL_syshaptic.c @ 2500:5251d0510b7e gsoc2008_force_feedback

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Implemented polar coordinates in linux. SDL_ConditionEffect now takes into account both axes.
author Edgar Simo <bobbens@gmail.com>
date Sun, 06 Jul 2008 21:47:41 +0000
parents 8f840a6cdf01
children 5356ca0c36a3
comparison
equal deleted inserted replaced
2499:cc2b270608b2 2500:5251d0510b7e
109 EV_TEST(FF_AUTOCENTER, SDL_HAPTIC_AUTOCENTER); 109 EV_TEST(FF_AUTOCENTER, SDL_HAPTIC_AUTOCENTER);
110 110
111 return ret; 111 return ret;
112 } 112 }
113 113
114 /*
115 * Initializes the haptic subsystem by finding available devices.
116 */
114 int 117 int
115 SDL_SYS_HapticInit(void) 118 SDL_SYS_HapticInit(void)
116 { 119 {
117 const char joydev_pattern[] = "/dev/input/event%d"; 120 const char joydev_pattern[] = "/dev/input/event%d";
118 dev_t dev_nums[MAX_HAPTICS]; 121 dev_t dev_nums[MAX_HAPTICS];
326 SDL_free(SDL_hapticlist[i].fname); 329 SDL_free(SDL_hapticlist[i].fname);
327 } 330 }
328 SDL_hapticlist[0].fname = NULL; 331 SDL_hapticlist[0].fname = NULL;
329 } 332 }
330 333
334 /*
335 * Returns the ff_effect usable direction from a SDL_HapticDirection.
336 */
337 static Uint16
338 SDL_SYS_ToDirection( SDL_HapticDirection * dir )
339 {
340 Uint32 tmp;
341
342 switch (dir->type) {
343 case SDL_HAPTIC_POLAR:
344 tmp = ((dir->dir[0] % 36000) * 0xFFFF) / 36000;
345 return (Uint16) tmp;
346 break;
347 case SDL_HAPTIC_CARTESIAN:
348 /* TODO implement cartesian for linux since it's not supported
349 * by driver */
350 break;
351
352 default:
353 return -1;
354 }
355
356 return 0;
357 }
358
331 #define CLAMP(x) (((x) > 32767) ? 32767 : x) 359 #define CLAMP(x) (((x) > 32767) ? 32767 : x)
332 /* 360 /*
333 * Initializes the linux effect struct from a haptic_effect. 361 * Initializes the linux effect struct from a haptic_effect.
334 * Values above 32767 (for unsigned) are unspecified so we must clamp. 362 * Values above 32767 (for unsigned) are unspecified so we must clamp.
335 */ 363 */
349 case SDL_HAPTIC_CONSTANT: 377 case SDL_HAPTIC_CONSTANT:
350 constant = &src->constant; 378 constant = &src->constant;
351 379
352 /* Header */ 380 /* Header */
353 dest->type = FF_CONSTANT; 381 dest->type = FF_CONSTANT;
354 dest->direction = CLAMP(constant->direction); 382 dest->direction = SDL_SYS_ToDirection(&constant->direction);
355 383
356 /* Replay */ 384 /* Replay */
357 dest->replay.length = CLAMP(constant->length); 385 dest->replay.length = CLAMP(constant->length);
358 dest->replay.delay = CLAMP(constant->delay); 386 dest->replay.delay = CLAMP(constant->delay);
359 387
379 case SDL_HAPTIC_SAWTOOTHDOWN: 407 case SDL_HAPTIC_SAWTOOTHDOWN:
380 periodic = &src->periodic; 408 periodic = &src->periodic;
381 409
382 /* Header */ 410 /* Header */
383 dest->type = FF_PERIODIC; 411 dest->type = FF_PERIODIC;
384 dest->direction = CLAMP(periodic->direction); 412 dest->direction = SDL_SYS_ToDirection(&periodic->direction);
385 413
386 /* Replay */ 414 /* Replay */
387 dest->replay.length = CLAMP(periodic->length); 415 dest->replay.length = CLAMP(periodic->length);
388 dest->replay.delay = CLAMP(periodic->delay); 416 dest->replay.delay = CLAMP(periodic->delay);
389 417
428 dest->type = FF_DAMPER; 456 dest->type = FF_DAMPER;
429 else if (dest->type == SDL_HAPTIC_INERTIA) 457 else if (dest->type == SDL_HAPTIC_INERTIA)
430 dest->type = FF_INERTIA; 458 dest->type = FF_INERTIA;
431 else if (dest->type == SDL_HAPTIC_FRICTION) 459 else if (dest->type == SDL_HAPTIC_FRICTION)
432 dest->type = FF_FRICTION; 460 dest->type = FF_FRICTION;
433 dest->direction = CLAMP(condition->direction); 461 dest->direction = 0; /* Handled by the condition-specifics. */
434 462
435 /* Replay */ 463 /* Replay */
436 dest->replay.length = CLAMP(condition->length); 464 dest->replay.length = CLAMP(condition->length);
437 dest->replay.delay = CLAMP(condition->delay); 465 dest->replay.delay = CLAMP(condition->delay);
438 466
439 /* Trigger */ 467 /* Trigger */
440 dest->trigger.button = CLAMP(condition->button); 468 dest->trigger.button = CLAMP(condition->button);
441 dest->trigger.interval = CLAMP(condition->interval); 469 dest->trigger.interval = CLAMP(condition->interval);
442 470
443 /* Condition - TODO handle axes */ 471 /* Condition */
444 dest->u.condition[0].right_saturation = CLAMP(condition->right_sat); 472 /* X axis */
445 dest->u.condition[0].left_saturation = CLAMP(condition->left_sat); 473 dest->u.condition[0].right_saturation = CLAMP(condition->right_sat[0]);
446 dest->u.condition[0].right_coeff = condition->right_coeff; 474 dest->u.condition[0].left_saturation = CLAMP(condition->left_sat[0]);
447 dest->u.condition[0].left_coeff = condition->left_coeff; 475 dest->u.condition[0].right_coeff = condition->right_coeff[0];
448 dest->u.condition[0].deadband = CLAMP(condition->deadband); 476 dest->u.condition[0].left_coeff = condition->left_coeff[0];
449 dest->u.condition[0].center = condition->center; 477 dest->u.condition[0].deadband = CLAMP(condition->deadband[0]);
478 dest->u.condition[0].center = condition->center[0];
479 /* Y axis */
480 dest->u.condition[1].right_saturation = CLAMP(condition->right_sat[1]);
481 dest->u.condition[1].left_saturation = CLAMP(condition->left_sat[1]);
482 dest->u.condition[1].right_coeff = condition->right_coeff[1];
483 dest->u.condition[1].left_coeff = condition->left_coeff[1];
484 dest->u.condition[1].deadband = CLAMP(condition->deadband[1]);
485 dest->u.condition[1].center = condition->center[1];
450 486
451 break; 487 break;
452 488
453 case SDL_HAPTIC_RAMP: 489 case SDL_HAPTIC_RAMP:
454 ramp = &src->ramp; 490 ramp = &src->ramp;
455 491
456 /* Header */ 492 /* Header */
457 dest->type = FF_RAMP; 493 dest->type = FF_RAMP;
458 dest->direction = CLAMP(ramp->direction); 494 dest->direction = SDL_SYS_ToDirection(&ramp->direction);
459 495
460 /* Replay */ 496 /* Replay */
461 dest->replay.length = CLAMP(ramp->length); 497 dest->replay.length = CLAMP(ramp->length);
462 dest->replay.delay = CLAMP(ramp->delay); 498 dest->replay.delay = CLAMP(ramp->delay);
463 499