53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
#include "zpl.h"
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#include "camera.h"
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#include "platform.h"
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#include "entity_view.h"
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#include "game.h"
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#define CAMERA_LERP_FACTOR 11.2f
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static camera main_camera;
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void camera_reset(void) {
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zpl_zero_item(&main_camera);
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main_camera.mode = CAMERA_MODE_STATIONARY;
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main_camera.first_time = true;
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}
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void camera_update(void) {
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switch (main_camera.mode) {
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case CAMERA_MODE_FOLLOW: {
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world_view *world = game_world_view_get_active();
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if (!world) break;
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entity_view *view = entity_view_get(&world->entities, main_camera.ent_id);
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if (!view) break;
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float smooth_ms = zpl_clamp((float)platform_frametime(), 0.0f, 1.0f);
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main_camera.x = zpl_lerp((float)main_camera.x, view->x, CAMERA_LERP_FACTOR*smooth_ms);
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main_camera.y = zpl_lerp((float)main_camera.y, view->y, CAMERA_LERP_FACTOR*smooth_ms);
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if (main_camera.first_time) {
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main_camera.first_time = false;
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main_camera.x = view->x;
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main_camera.y = view->y;
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}
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}break;
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default: {
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}break;
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}
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}
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void camera_set_follow(uint64_t ent_id) {
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main_camera.mode = CAMERA_MODE_FOLLOW;
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main_camera.ent_id = ent_id;
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}
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void camera_set_pos(double x, double y) {
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main_camera.mode = CAMERA_MODE_STATIONARY;
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main_camera.x = x;
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main_camera.y = y;
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}
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camera camera_get(void) {
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return main_camera;
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}
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