Mercurial > MadButterfly
annotate src/rotate.c @ 905:e3a5e05f00c1
Roughly DirectFB backend porting.
| author | Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com> |
|---|---|
| date | Sun, 03 Oct 2010 18:12:11 +0800 |
| parents | 586e50f82c1f |
| children |
| rev | line source |
|---|---|
|
822
586e50f82c1f
Unify coding style tag for emacs and vim.
Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com>
parents:
186
diff
changeset
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1 // -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*- |
|
586e50f82c1f
Unify coding style tag for emacs and vim.
Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com>
parents:
186
diff
changeset
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2 // vim: sw=4:ts=8:sts=4 |
| 117 | 3 #include <stdio.h> |
| 4 #include <stdlib.h> | |
| 5 #include <string.h> | |
| 6 #include <math.h> | |
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186
530bb7728546
Move header files to $(top_srcdir)/include/ and prefixed with 'mb_'.
Thinker K.F. Li <thinker@branda.to>
parents:
185
diff
changeset
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7 #include "mb_animate.h" |
| 117 | 8 |
| 9 static float comp_mb_timeval_ratio(const mb_timeval_t *a, | |
| 10 const mb_timeval_t *b) { | |
| 11 float ratio; | |
| 12 | |
| 13 ratio = (float)MB_TIMEVAL_SEC(a) * 1000000.0 + (float)MB_TIMEVAL_USEC(a); | |
| 14 ratio /= (float)MB_TIMEVAL_SEC(b) * 1000000.0 + (float)MB_TIMEVAL_USEC(b); | |
| 15 return ratio; | |
| 16 } | |
| 17 | |
| 18 /*! \brief Animation action to rotate a coordinate. | |
| 19 */ | |
| 20 struct _mb_rotate { | |
| 21 mb_action_t action; | |
| 22 | |
| 23 co_aix angle1, angle2; | |
| 24 coord_t *coord; | |
| 25 | |
| 26 mb_timeval_t start_time; | |
| 27 const mb_timeval_t *playing_time; | |
| 28 }; | |
| 29 typedef struct _mb_rotate mb_rotate_t; | |
| 30 | |
| 31 static void mb_rotate_start(mb_action_t *act, | |
| 32 const mb_timeval_t *now, | |
| 33 const mb_timeval_t *playing_time, | |
| 34 redraw_man_t *rdman) { | |
| 35 mb_rotate_t *rotate = (mb_rotate_t *)act; | |
| 36 co_aix *matrix; | |
| 37 float _sin, _cos; | |
| 38 | |
| 39 _sin = sinf(rotate->angle1); | |
| 40 _cos = cosf(rotate->angle1); | |
| 41 | |
| 42 matrix = rotate->coord->matrix; | |
| 43 memset(matrix, 0, sizeof(co_aix) * 6); | |
| 44 matrix[0] = _cos; | |
| 45 matrix[1] = -_sin; | |
| 46 matrix[3] = _sin; | |
| 47 matrix[4] = _cos; | |
| 48 rdman_coord_changed(rdman, rotate->coord); | |
| 49 | |
| 50 MB_TIMEVAL_CP(&rotate->start_time, now); | |
| 51 rotate->playing_time = playing_time; | |
| 52 } | |
| 53 | |
| 54 static void mb_rotate_step(mb_action_t *act, const mb_timeval_t *now, | |
| 55 redraw_man_t *rdman) { | |
| 56 mb_rotate_t *rotate = (mb_rotate_t *)act; | |
| 57 mb_timeval_t diff; | |
| 58 co_aix *matrix; | |
| 59 float ratio; | |
| 60 float angle; | |
| 61 float _sin, _cos; | |
| 62 | |
| 63 MB_TIMEVAL_CP(&diff, now); | |
| 64 MB_TIMEVAL_DIFF(&diff, &rotate->start_time); | |
| 65 ratio = comp_mb_timeval_ratio(&diff, rotate->playing_time); | |
| 66 | |
| 67 angle = rotate->angle1 * (1 - ratio) + rotate->angle2 * ratio; | |
| 68 _sin = sinf(angle); | |
| 69 _cos = cosf(angle); | |
| 70 | |
| 71 matrix = rotate->coord->matrix; | |
| 72 matrix[0] = _cos; | |
| 73 matrix[1] = -_sin; | |
| 74 matrix[3] = _sin; | |
| 75 matrix[4] = _cos; | |
| 76 rdman_coord_changed(rdman, rotate->coord); | |
| 77 } | |
| 78 | |
| 79 static void mb_rotate_stop(mb_action_t *act, const mb_timeval_t *now, | |
| 80 redraw_man_t *rdman) { | |
| 81 mb_rotate_t *rotate = (mb_rotate_t *)act; | |
| 82 co_aix *matrix; | |
| 83 float _sin, _cos; | |
| 84 | |
| 85 _sin = sinf(rotate->angle2); | |
| 86 _cos = cosf(rotate->angle2); | |
| 87 | |
| 88 matrix = rotate->coord->matrix; | |
| 89 matrix[0] = _cos; | |
| 90 matrix[1] = -_sin; | |
| 91 matrix[3] = _sin; | |
| 92 matrix[4] = _cos; | |
| 93 rdman_coord_changed(rdman, rotate->coord); | |
| 94 } | |
| 95 | |
| 96 static void mb_rotate_free(mb_action_t *act) { | |
| 97 free(act); | |
| 98 } | |
| 99 | |
| 100 mb_action_t *mb_rotate_new(float angle1, float angle2, | |
| 101 coord_t *coord, | |
| 102 mb_word_t *word) { | |
| 103 mb_rotate_t *rotate; | |
| 104 | |
| 105 rotate = (mb_rotate_t *)malloc(sizeof(mb_rotate_t)); | |
| 106 if(rotate == NULL) | |
| 107 return NULL; | |
| 108 | |
| 109 rotate->angle1 = angle1; | |
| 110 rotate->angle2 = angle2; | |
| 111 rotate->coord = coord; | |
| 112 | |
| 113 rotate->action.start = mb_rotate_start; | |
| 114 rotate->action.step = mb_rotate_step; | |
| 115 rotate->action.stop = mb_rotate_stop; | |
| 116 rotate->action.free = mb_rotate_free; | |
| 117 | |
| 118 mb_word_add_action(word, (mb_action_t *)rotate); | |
| 119 | |
| 120 return (mb_action_t *)rotate; | |
| 121 } |