2 files changed, 10 insertions, 0 deletions
diff --git a/include/SSystem/SComponent/c_lib.h b/include/SSystem/SComponent/c_lib.h
index 8ff0092bc1..cdbfb6356e 100644
--- a/include/SSystem/SComponent/c_lib.h
+++ b/include/SSystem/SComponent/c_lib.h
@@ -4,6 +4,11 @@
 #include "SSystem/SComponent/c_xyz.h"
 #include "dolphin/mtx/mtx.h"
 #include "dolphin/types.h"
+#include "msl_c/math.h"
+
+inline bool cLib_IsZero(f32 f) {
+    return fabsf(f) < 8e-11;
+}
 
 void cLib_memCpy(void* dst, const void* src, unsigned long size);
 void cLib_memSet(void* ptr, int value, unsigned long size);
diff --git a/include/SSystem/SComponent/c_xyz.h b/include/SSystem/SComponent/c_xyz.h
index 0f28e22048..5cef049e7f 100644
--- a/include/SSystem/SComponent/c_xyz.h
+++ b/include/SSystem/SComponent/c_xyz.h
@@ -3,6 +3,7 @@
 
 #include "dolphin/mtx/vec.h"
 #include "global.h"
+#include "msl_c/math.h"
 
 struct cXyz : Vec {
     static const cXyz Zero;
@@ -50,11 +51,13 @@ struct cXyz : Vec {
         y -= f;
         z -= f;
     }
+    void operator-=(const Vec& other) { PSVECSubtract(this, &other, this); }
     void operator+=(const Vec& vec) {
         x += vec.x;
         y += vec.y;
         z += vec.z;
     }
+    void operator*=(f32 scale) { PSVECScale(this, this, scale); }
     /* 80266C6C */ cXyz getCrossProduct(Vec const&) const;
     /* 80266CBC */ cXyz outprod(Vec const&) const;
     /* 80266CE4 */ cXyz norm() const;
@@ -116,6 +119,8 @@ struct cXyz : Vec {
         cXyz tmp2(other.x, 0, other.z);
         return tmp.abs2(tmp2);
     }
+    f32 abs() const { return sqrtf(this->abs2()); }
+    f32 abs(const Vec& other) const { return sqrtf(this->abs2(other)); }
     f32 getMagXZ() const { return cXyz(this->x, 0, this->z).getSquareMag(); }
 };