Mesh.BuildFromTriangles

function ENT:Initialize()
	self.mesh = NewMesh();
	local meshexample = {}
	--top left triangle 
	meshexample[1] = { pos = Vector(-1, -1,-1), normal = Vector(0,-2,2), u=0, v=0  }
	meshexample[2] = { pos = Vector(-1, -1, 1),normal = Vector(0,-2,2), u=0, v=1  }
	meshexample[3] = { pos = Vector( 1,-1 , 1), normal = Vector(0,-2,2), u=1, v=1  }
	--bottom right triangle , we change the normal so you can see the 2 triangles better 
	meshexample[4] = { pos = Vector(-1, -1, -1 ),normal = Vector(0,-2,0), u=0, v=0  }
	meshexample[5] = { pos = Vector( 1,-1,1), normal = Vector(0,-2,0), u=1, v=1  }
	meshexample[6] = { pos = Vector(1,-1,-1), normal = Vector(0,-2,0),  u=1, v=0  }
	-- normal is where the light source is located, think of this as positioning the sun
	-- u is the horizontal texture cord , v is the vertical, they are floats
	-- u = 0 , v = 0 would be the bottom left of the texture , 0,1 is top left
	self.mesh:BuildFromTriangles(meshexample);
end
function ENT:Draw()
	self:DrawModel();
	local scale = 50;
 
	mat = Matrix();
	mat:Translate( self:GetPos() );
	mat:Rotate(Angle(0,0,-45));
	mat:Scale( Vector( 1, 1, 1 ) * scale );
 
 
	render.SetMaterial( Material("models/props_wasteland/wood_fence01a") );
	cam.PushModelMatrix ( mat );
		self.mesh:Draw();
	cam.PopModelMatrix();
end