From 6b2f049704b6a03f583c9ec3404af7dc6774ed3d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dominik=20Madar=C3=A1sz?= <zaklaus@outlook.com>
Date: Tue, 27 Jul 2021 15:01:17 +0200
Subject: [PATCH] camera: instant follow on the first entity

---
 code/game/header/camera.h | 3 +++
 code/game/source/camera.c | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/code/game/header/camera.h b/code/game/header/camera.h
index 61dab7f..14776e6 100644
--- a/code/game/header/camera.h
+++ b/code/game/header/camera.h
@@ -11,6 +11,9 @@ typedef struct {
     camera_mode mode;
     uint64_t ent_id;
     double x, y;
+    
+    // HACK(zaklaus): Don't lerp if this is the first time we follow any entity.
+    bool first_time;
 } camera;
 
 void camera_reset(void);
diff --git a/code/game/source/camera.c b/code/game/source/camera.c
index ec15240..44800ef 100644
--- a/code/game/source/camera.c
+++ b/code/game/source/camera.c
@@ -10,6 +10,7 @@ static camera main_camera;
 void camera_reset(void) {
     zpl_zero_item(&main_camera);
     main_camera.mode = CAMERA_MODE_STATIONARY;
+    main_camera.first_time = true;
 }
 
 void camera_update(void) {
@@ -22,6 +23,12 @@ void camera_update(void) {
             
             main_camera.x = zpl_lerp(main_camera.x, view->x, CAMERA_LERP_FACTOR);
             main_camera.y = zpl_lerp(main_camera.y, view->y, CAMERA_LERP_FACTOR);
+            
+            if (main_camera.first_time) {
+                main_camera.first_time = false;
+                main_camera.x = view->x;
+                main_camera.y = view->y;
+            }
         }break;
         
         default: {