From be76a975de342649e0eff3f0c39ae8ae90c98236 Mon Sep 17 00:00:00 2001
From: Mylloon <kennel.anri@tutanota.com>
Date: Fri, 19 May 2023 11:13:37 +0200
Subject: [PATCH] idk? rotate lights so it move

---
 includes/utils.h |  3 +++
 src/manif.c      |  5 +++--
 src/utils.c      | 11 +++++++++++
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/includes/utils.h b/includes/utils.h
index 3f4ee18..4cdac30 100644
--- a/includes/utils.h
+++ b/includes/utils.h
@@ -25,4 +25,7 @@ void bindAndLoadf(const char *name);
  * `-z` => move away */
 void move(GLfloat x, GLfloat y, GLfloat z);
 
+/* Rotate a vector XYZ */
+void rotate_vec(GLfloat *, GLfloat);
+
 #endif
diff --git a/src/manif.c b/src/manif.c
index 74b0c4f..2b8492e 100644
--- a/src/manif.c
+++ b/src/manif.c
@@ -101,8 +101,9 @@ static void draw(void) {
   for (int i = 0; i < HEROS_NUMBER; ++i) {
     // Torchs
     // Position
-    const GLfloat lumpos_i[] = {(_herosId[i].ox / 10) + (deplacement / 10), 1,
-                                (_herosId[i].oz / 20) - 1, 0};
+    GLfloat lumpos_i[] = {(_herosId[i].ox / 10) + (deplacement / 10), 1,
+                          ((_herosId[i].oz / 20) - 1)};
+    rotate_vec(lumpos_i, 2 * ((float)sin(deplacement) + 1) / 2);
     memcpy(lumpos[i], lumpos_i, sizeof(lumpos_i));
 
     // Color
diff --git a/src/utils.c b/src/utils.c
index e3cc442..cf035fc 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -15,3 +15,14 @@ void bindAndLoadf(const char *name) {
 }
 
 void move(GLfloat x, GLfloat y, GLfloat z) { gl4duTranslatef(x, y, z); }
+
+void rotate_vec(GLfloat *vec, GLfloat angle) {
+  GLfloat y = vec[1];
+  GLfloat z = vec[2];
+
+  GLfloat cosTheta = (GLfloat)cos(angle);
+  GLfloat sinTheta = (GLfloat)sin(angle);
+
+  vec[1] = y * cosTheta - z * sinTheta;
+  vec[2] = y * sinTheta + z * cosTheta;
+}