Mirai's Miscellaneous Misadventures

M43 / core / cameras.c

1/* license: AGPLv3 or later */
2/* copyright 2023 zamfofex */
3
4#include <mimimi.h>
5
6void mimimi_camera_tick(struct mimimi_position *camera, struct mimimi_position *position, int ox, int oy)
7{
8	camera->x *= 3;
9	camera->y *= 3;
10	camera->x += position->x + ox;
11	camera->y += position->y + oy;
12	camera->x /= 4;
13	camera->y /= 4;
14}
15
16void mimimi_clamped_camera_tick(struct mimimi_clamped_camera *camera)
17{
18	struct mimimi_position *origin;
19	struct mimimi_position *position;
20	struct mimimi_position *input;
21	struct mimimi_position *output;
22	int i;
23	int left, right;
24	int top, bottom;
25	int count;
26	struct mimimi_clamped_camera_threshold *thresholds;
27	
28	origin = camera->origin;
29	position = camera->position;
30	input = camera->input;
31	output = &camera->output;
32	count = camera->count;
33	thresholds = camera->thresholds;
34	
35	i = 1;
36	while (i < count)
37	{
38		if (position->x / 128 < thresholds[i].x + origin->x)
39			break;
40		i++;
41	}
42	
43	left = (thresholds[i - 1].x + origin->x + 16) * 128;
44	right = (thresholds[i].x + origin->x - 16) * 128;
45	
46	top = (thresholds[i].top + origin->y - 4) * 128;
47	bottom = (thresholds[i].bottom + origin->y - 4) * 128;
48	
49	*output = *input;
50	
51	if (output->x < left) output->x = left;
52	if (output->x > right) output->x = right;
53	if (output->y < top) output->y = top;
54	if (output->y > bottom) output->y = bottom;
55}