Ben NanoNote 3D scans
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Ben NanoNote 3D scans Commit Details
| Date: | 2010-09-24 22:28:48 (8 years 10 months ago) |
|---|---|
| Author: | Werner Almesberger |
| Commit: | 2764155d15eeca9715b2428fa8653cc35ed7cb79 |
| Message: | Increase dynamic range of rotation and follow "far from center
= faster" paradigm. - solidify/overlap.c (scroll_event): make weighting of rotation exponential, so we can both adjust precisely and spin rapidly. Also reverse weighting to rotate more quickly on the outside. - solidify/style.h (SLOWEST_ROT, FASTEST_ROT): parameters for weighting of rotation |
| Files: |
solidify/overlap.c (1 diff) solidify/style.h (1 diff) |
Change Details
| solidify/overlap.c | ||
|---|---|---|
| 362 | 362 | int dy = event->y-sy(s)/2; |
| 363 | 363 | double r = hypot(dx, dy); |
| 364 | 364 | double rc = r_center(s); |
| 365 | double rs, rot; | |
| 365 | 366 | int center = r < rc; |
| 366 | 367 | int osd = osd_proximity(s, dx, dy); |
| 367 | 368 | |
| 368 | 369 | if (r < 1) |
| 369 | 370 | return TRUE; |
| 371 | ||
| 372 | /* | |
| 373 | * rot goes exponentially from SLOWEST_ROT*rs to FASTEST_ROT for | |
| 374 | * r = rc to rs, with rs being half the canvas diagonal. | |
| 375 | * | |
| 376 | * The values are picked such that we achieve sufficient precision at | |
| 377 | * a reasonably large distance from the circle (for accidently entering | |
| 378 | * the circle would change the mode) but can also spin quickly, e.g., | |
| 379 | * when a 180 degrees rotation is needed. | |
| 380 | * | |
| 381 | * First, normalize to 0 ... 1 | |
| 382 | * Then, we start at exp(0) and end at | |
| 383 | * exp(ln(SLOWEST_ROT*rs/FASTEST_ROT))) | |
| 384 | */ | |
| 385 | rs = hypot(sx(s), sy(s))/2; | |
| 386 | rot = (r-rc)/(rs-rc); | |
| 387 | rot = SLOWEST_ROT*rs*exp(-rot*log(SLOWEST_ROT*rs/FASTEST_ROT)); | |
| 388 | ||
| 370 | 389 | switch (event->direction) { |
| 371 | 390 | case GDK_SCROLL_UP: |
| 372 | 391 | if (center) |
| 373 | 392 | shift(&s->a->m, dx, dy, 1); |
| 374 | 393 | else |
| 375 | rotate(&s->a->m, dx > 0 ? r : -r); | |
| 394 | rotate(&s->a->m, dx > 0 ? rot : -rot); | |
| 376 | 395 | draw_image(darea, s, osd); |
| 377 | 396 | break; |
| 378 | 397 | case GDK_SCROLL_DOWN: |
| 379 | 398 | if (center) |
| 380 | 399 | shift(&s->a->m, dx, dy, -1); |
| 381 | 400 | else |
| 382 | rotate(&s->a->m, dx > 0 ? -r : r); | |
| 401 | rotate(&s->a->m, dx > 0 ? -rot : rot); | |
| 383 | 402 | draw_image(darea, s, osd); |
| 384 | 403 | break; |
| 385 | 404 | default: |
| solidify/style.h | ||
|---|---|---|
| 23 | 23 | #define LEVEL_CENTER_DIV 5 /* fraction of diagonal */ |
| 24 | 24 | #define OVERLAP_BORDER 10 /* pixels around min. drawing area */ |
| 25 | 25 | #define OVERLAP_CENTER_DIV 5 /* fraction of diagonal */ |
| 26 | #define SLOWEST_ROT 3 /* thrice the half-diagonal */ | |
| 27 | #define FASTEST_ROT 2 /* one pixel in distance of 2 pixels */ | |
| 26 | 28 | |
| 27 | 29 | |
| 28 | 30 | void init_style(GdkDrawable *da); |
Branches:
master
