more camera movement

src/game/Global.cpp

@@ -9,6 +9,21 @@ namespace
     Game::GameInstance* GameInst = nullptr;
 } // namespace
 
+void Vec2::Normalize()
+{
+    float len = bx::sqrt(X * X + Y * Y);
+    X /= len;
+    Y /= len;
+}
+
+void Vec3::Normalize()
+{
+    float len = bx::sqrt(X * X + Y * Y + Z * Z);
+    X /= len;
+    Y /= len;
+    Z /= len;
+}
+
 Quat Quat::FromEuler(float x, float y, float z)
 {
     x *= bx::kPi / 180.0f;
@@ -47,13 +62,23 @@ void Mat4::CreateTransform(float* out, Vec3 pos, Quat rot, Vec3 scale)
     bx::mtxMul(out, buf, tMat);
 }
 
-void Mat4::Translate(Vec3 offset)
+void Mat4::TranslateLocal(Vec3 offset)
 {
     M[12] += offset.X;
     M[13] += offset.Y;
     M[14] += offset.Z;
 }
 
+void Mat4::Rotate(Vec3 rotation)
+{
+    float rot[16]{0};
+    bx::mtxRotateXYZ(rot, rotation.X, rotation.Y, rotation.Z);
+    float temp[16]{0};
+    bx::mtxMul(temp, M, rot);
+    for (int32_t i = 0; i < 16; ++i)
+        M[i] = temp[i];
+}
+
 Vec3 Mat4::Right()
 {
     return {M[0], M[1], M[2]};