Initial commit

sim/port.lua

@@ -0,0 +1,67 @@
+PortTypes = {
+	output = 0,
+	input = 1
+}
+
+PortDirections = {
+	[0] = {-1, 0, 0},
+	[1] = {0, 1, 0},
+	[2] = {1, 0, 0},
+	[3] = {0, -1, 0},
+	[4] = {0, 0, 1},
+	[5] = {0, 0, -1}
+}
+
+Port = {
+	logictype = 1,
+}
+
+function Port:new(type, direction, position, causeupdate)
+	local o = {
+		type = type,
+		direction = direction,
+		position = position,
+		causeupdate = causeupdate,
+		state = false,
+		gate = nil,
+		group = nil,
+	}
+	setmetatable(o, self)
+	self.__index = self
+	return o
+end
+
+function Port:setstate(state)
+	if state ~= self.state then
+		self.state = state
+		sim:queuegroup(self.group)
+	end
+end
+
+function Port:setinputstate(state)
+	if state ~= self.state then
+		self.state = state
+		if self.causeupdate then
+			sim:queuegate(self.gate)
+		end
+	end
+end
+
+function Port:getconnectionposition()
+	local offset = PortDirections[self.direction]
+	return {self.position[1]+offset[1], self.position[2]+offset[2], self.position[3]+offset[3]}
+end
+
+function Port:isrising()
+	if self.group == nil then
+		return false
+	end
+	return self.group.state and (self.group.updatetick == sim.currenttick)
+end
+
+function Port:isfalling()
+	if self.group == nil then
+		return false
+	end
+	return self.group.state == false and (self.group.updatetick == sim.currenttick)
+end