Added some methods

include/Mat4x4.hh

@@ -26,13 +26,14 @@ class vlMatrix4x4 : public vlObject
   vlMatrix4x4 ();
   void operator= (float element);
   void operator= (vlMatrix4x4& source);
+  float *operator[](const unsigned int i) const {return &(Element[i][0]);};
 
   //  Calculate the inverse of in and
   //  return it in out.
   void Invert (vlMatrix4x4 in,vlMatrix4x4 & out);
   void Invert (void) { Invert(*this,*this);};
 
-  void VectorMultiply(float,float,float,float,float a[4]);
+  void VectorMultiply(float in[4], float out[4]);
   void Adjoint (vlMatrix4x4 & in,vlMatrix4x4 & out);
   float Determinant (vlMatrix4x4 & in);
   char *GetClassName () {return "vlMatrix4x4";};

src/Mat4x4.cc

@@ -33,17 +33,21 @@ void vlMatrix4x4::operator= (float element)
   this->Modified ();
 }
 
-void vlMatrix4x4::VectorMultiply(float,float,float,float,float result[4])
+void vlMatrix4x4::VectorMultiply(float in[4],float result[4])
 {
   int i;
+  float v1 = in[0];
+  float v2 = in[1];
+  float v3 = in[2];
+  float v4 = in[3];
   
   for (i = 0; i < 4; i++)
     {
     result[i] = 
-      result[0] * this->Element[0][3] +
-      result[1] * this->Element[1][3] +
-      result[2] * this->Element[2][3] +
-      result[3] * this->Element[3][3];
+      v1 * this->Element[0][i] +
+      v2 * this->Element[1][i] +
+      v3 * this->Element[2][i] +
+      v4 * this->Element[3][i];
     }
   
 }