Added more math functionsto the vectors and matrix classes.

matrix.py

@@ -10,13 +10,25 @@ class Matrix3x3:
 	def row1(self):
 		return self.rows[0]
 		
+	@row1.setter
+	def row1(self, value):
+		self.rows[0] = value
+		
 	@property
 	def row2(self):
 		return self.rows[1]
 		
+	@row2.setter
+	def row2(self, value):
+		self.rows[1] = value
+		
 	@property
 	def row3(self):
 		return self.rows[2]
+		
+	@row3.setter
+	def row3(self, value):
+		self.rows[2] = value
 
 	def __getitem__(self, key):
 		return self.rows[key]
@@ -42,6 +54,10 @@ class Matrix4x4(Matrix3x3):
 	def row4(self):
 		return self.rows[3]
 		
+	@row4.setter
+	def row4(self, value):
+		self.rows[3] = value
+		
 	def multiply_3d(self, vector3d):
 		x = vector3d.x * self.row1.x + vector3d.y * self.row2.x + vector3d.z * self.row3.x + self.row4.x
 		y = vector3d.x * self.row1.y + vector3d.y * self.row2.y + vector3d.z * self.row3.y + self.row4.y