101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
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#include "iron_tilesheet.h"
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#include "iron_gc.h"
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#include <math.h>
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#include <string.h>
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tilesheet_data_t *tilesheet_datas = NULL;
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i32 tilesheet_datas_count = 0;
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f32 sys_real_delta(void);
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f32 math_floor(f32 x);
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tilesheet_t *tilesheet_create(char *scene_name, char *tilesheet_ref, char *tilesheet_action_ref) {
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tilesheet_t *t = gc_alloc(sizeof(tilesheet_t));
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t->ready = false;
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for (i32 i = 0; i < tilesheet_datas_count; ++i) {
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tilesheet_data_t *ts = &tilesheet_datas[i];
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if (strcmp(ts->name, tilesheet_ref) == 0) {
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t->raw = ts;
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tilesheet_play(t, tilesheet_action_ref, NULL);
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t->ready = true;
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break;
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}
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}
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return t;
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}
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void tilesheet_play(tilesheet_t *self, char *action_ref, void (*on_action_complete)(void)) {
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self->on_action_complete = on_action_complete;
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for (i32 i = 0; i < self->raw->actions_count; ++i) {
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tilesheet_action_t *a = &self->raw->actions[i];
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if (strcmp(a->name, action_ref) == 0) {
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self->action = a;
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break;
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}
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}
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tilesheet_set_frame(self, self->action->start);
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self->paused = false;
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self->time = 0.0f;
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}
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void tilesheet_pause(tilesheet_t *self) {
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self->paused = true;
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}
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void tilesheet_resume(tilesheet_t *self) {
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self->paused = false;
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}
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void tilesheet_set_frame_offset(tilesheet_t *self, i32 frame) {
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tilesheet_set_frame(self, self->action->start + frame);
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self->paused = false;
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}
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i32 tilesheet_get_frame_offset(tilesheet_t *self) {
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return self->frame - self->action->start;
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}
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void tilesheet_update(tilesheet_t *self) {
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if (!self->ready || self->paused) {
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return;
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}
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self->time += sys_real_delta();
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f32 frame_time = 1.0f / self->raw->framerate;
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i32 frames_to_advance = 0;
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while (self->time >= frame_time) {
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self->time -= frame_time;
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frames_to_advance++;
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}
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if (frames_to_advance != 0) {
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tilesheet_set_frame(self, self->frame + frames_to_advance);
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}
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}
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void tilesheet_set_frame(tilesheet_t *self, i32 f) {
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self->frame = f;
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// Action end
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if (self->frame > self->action->end) {
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if (self->on_action_complete != NULL) {
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self->on_action_complete();
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}
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if (self->action->loop) {
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tilesheet_set_frame(self, self->action->start);
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}
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else {
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self->paused = true;
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}
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return;
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}
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i32 tx = self->frame % self->raw->tiles_x;
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i32 ty = (i32)math_floor((f32)self->frame / self->raw->tiles_x);
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self->tile_x = tx * (1.0f / self->raw->tiles_x);
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self->tile_y = ty * (1.0f / self->raw->tiles_y);
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}
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