From 42b0d16593dd10088b15245e63dd0f34f2e67a51 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20GUEZO?= <loicguezo@gmail.com>
Date: Fri, 29 Aug 2025 21:52:25 +0200
Subject: [PATCH] feat: add rotation function and add functions to cam.h

---
 src/cam.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 src/cam.h |  8 +++++++-
 2 files changed, 49 insertions(+), 1 deletion(-)

diff --git a/src/cam.c b/src/cam.c
index 957f87a..091d5e3 100644
--- a/src/cam.c
+++ b/src/cam.c
@@ -59,4 +59,46 @@ Mat4f_t lookAt(Vec4f_t* eye, Vec4f_t* center, Vec4f_t* up)
     };
 
     return mat4f_from_array(m);
+}
+
+Mat4f_t rotateX(float angle)
+{
+    Mat4f_t r = mat4f_identity();
+    float c = cosf(angle);
+    float s = sinf(angle);
+
+    r.m[5] = c;
+    r.m[6] = -s;
+    r.m[9] = s;
+    r.m[10] = c;
+
+    return r;
+}
+
+Mat4f_t rotateY(float angle)
+{
+    Mat4f_t r = mat4f_identity();
+    float c = cosf(angle);
+    float s = sinf(angle);
+
+    r.m[0] = c;
+    r.m[2] = s;
+    r.m[8] = -s;
+    r.m[10] = c;
+
+    return r;
+}
+
+Mat4f_t rotateZ(float angle)
+{
+    Mat4f_t r = mat4f_identity();
+    float c = cosf(angle);
+    float s = sinf(angle);
+
+    r.m[0] = c;
+    r.m[1] = -s;
+    r.m[4] = s;
+    r.m[5] = c;
+
+    return r;
 }
\ No newline at end of file
diff --git a/src/cam.h b/src/cam.h
index f533b32..366dbb3 100644
--- a/src/cam.h
+++ b/src/cam.h
@@ -3,4 +3,10 @@
 
 Mat4f_t perspCam(float fov, float asp, float near, float far);
 Vec4f_t* normCoord_r(Vec4f_t* vec);
-Vec4f_t* viewport_r(Vec4f_t* vec, float width, float height);
\ No newline at end of file
+Vec4f_t* viewport_r(Vec4f_t* vec, float width, float height);
+
+Mat4f_t lookAt(Vec4f_t* eye, Vec4f_t* center, Vec4f_t* up);
+
+Mat4f_t rotateX(float angle);
+Mat4f_t rotateY(float angle);
+Mat4f_t rotateZ(float angle);
\ No newline at end of file