Match daObj_hole

include/SSystem/SComponent/c_m3d_g_pla.h

@@ -2,6 +2,7 @@
 #define C_M3D_G_PLA_H_
 
 #include "SSystem/SComponent/c_xyz.h"
+#include "SSystem/SComponent/c_m3d.h"
 #include "dolphin/mtx/vec.h"
 
 // Plane with a normal
@@ -14,10 +15,19 @@ public:
     cM3dGPla() {}
     void CalcAngleXz(short* pAngleX, short* pAngleY) const;
     void SetupNP0(const Vec&, const Vec&);
+    
     f32 getPlaneFunc(const Vec *p) const {
         return mD + VECDotProduct(&mNormal, p);
     }
+
     const cXyz * GetNP() const { return &mNormal; }
+    f32 getCrossY(const cXyz& i_axis, float* i_value) const {
+        if (!cM3d_IsZero(mNormal.y)) {
+            *i_value = (-mNormal.x * i_axis.x -
+                         mNormal.z * i_axis.z -
+                         mD) / mNormal.y;
+        }
+    }
     
     virtual ~cM3dGPla() {}
 };