starfall-data/koptilnya/engine_remastered/powertrain/wheel.txt

--@include ./powertrain_component.txt
--@include ../wheel/wheel.txt
--@include /koptilnya/libs/constants.txt
--@include /koptilnya/libs/entity.txt

local PowertrainComponent = require('./powertrain_component.txt')
local CustomWheel = require('../wheel/wheel.txt')

require('/koptilnya/libs/constants.txt')
require('/koptilnya/libs/entity.txt')

---@class WheelConfig: PowertrainComponentConfig
---@field Entity? Entity
---@field BrakePower? number
---@field HandbrakePower? number
---@field Model? string
---@field Offset? number In degrees
---@field CustomWheel? CustomWheelConfig

---@class Wheel: PowertrainComponent
---@field entity Entity
---@field brakePower number
---@field handbrakePower number
---@field direction integer
---@field private rot number
---@field model string
---@field holo Hologram | Entity
---@field customWheel CustomWheel
local Wheel = class('Wheel', PowertrainComponent)

---@private
---@param vehicle KPTLVehicle
---@param name string
---@param config WheelConfig
function Wheel:initialize(vehicle, name, config)
	PowertrainComponent.initialize(self, vehicle, name, config)

	if CLIENT and self.DEBUG then
		local mat = render.createMaterial('models/debug/debugwhite')

		local lerpLoad = 0
		local lerpForwardFrictionForce = 0
		local lerpSideFrictionForce = 0

		hook.add('PostDrawTranslucentRenderables', 'DEBUG_RENDER_' .. self.name, function()
			if next(self.DEBUG_DATA) == nil then
				return
			end
			if not isValid(self.DEBUG_DATA.entity) then
				return
			end

			local pos = self.DEBUG_DATA.entity:localToWorld(Vector(0, 0, -self.DEBUG_DATA.radius * UNITS_PER_METER))

			render.setMaterial(mat)
			render.setColor(Color(255, 0, 0, 200))
			lerpForwardFrictionForce = math.lerp(0.1, lerpForwardFrictionForce, self.DEBUG_DATA.forwardFrictionForce)
			render.draw3DBeam(pos, pos + ((lerpForwardFrictionForce / 500 + 16) * self.DEBUG_DATA.forward), 1, 0, 0)

			render.setColor(Color(0, 255, 0, 255))
			lerpSideFrictionForce = math.lerp(0.1, lerpSideFrictionForce, self.DEBUG_DATA.sideFrictionForce)
			render.draw3DBeam(pos, pos + ((lerpSideFrictionForce / 500 + 16) * self.DEBUG_DATA.right), 1, 0, 0)

			render.setColor(Color(0, 0, 255, 200))
			lerpLoad = math.lerp(0.1, lerpLoad, self.DEBUG_DATA.load)
			render.draw3DBeam(pos, pos + ((lerpLoad / 1000 * 4 + 16) * self.DEBUG_DATA.up), 1, 0, 0)
		end)

		if player() == owner() and not render.isHUDActive() then
			enableHud(owner(), true)
		end
		return
	end

	self.entity = config.Entity or NULL_ENTITY
	self.brakePower = config.BrakePower or 0
	self.handbrakePower = config.HandbrakePower or 0
	self.model = config.Model or ''

	self.direction = math.sign(math.cos(math.rad(config.Offset or 0)))

	self.wireInputs = {
		[self.name] = 'entity',
	}
	self.wireOutputs = {
		[string.format('%s_RPM', self.name)] = 'number',
		[string.format('%s_Fx', self.name)] = 'number',
		[string.format('%s_CTq', self.name)] = 'number',
	}

	self.rot = 0

	self.holo = self:createHolo(self.entity)

	self.customWheel = CustomWheel:new(table.merge(table.copy(config.CustomWheel), { Direction = self.direction, Name = self.name }))

	hook.add('Input', 'vehicle_wheel_update' .. self.name, function(name, value)
		if name == self.name then
			self.entity = value
			self.customWheel:setEntity(value)

			if isValid(self.holo) then
				self.holo:remove()
			end

			self.holo = self:createHolo(self.entity)
			self.customWheel.radius = self:getEntityRadius()
		end
	end)

	self.steerVelocity = 0
end

function Wheel:getEntityRadius()
	if not isValid(self.entity) then
		return 0
	end

	return self.entity:getModelRadius() * UNITS_TO_METERS
end

---@return Hologram | Entity
function Wheel:createHolo(entity)
	if not isValid(entity) then
		return NULL_ENTITY
	end

	local holo = hologram.create(entity:getPos(), entity:getAngles(), self.model or '')

	if holo == nil or isValid(holo) then
		return NULL_ENTITY
	end

	holo:setParent(entity)

	entity:setColor(Color(0, 0, 0, 0))

	return holo
end

---@return nil
function Wheel:updateWireOutputs()
	PowertrainComponent.updateWireOutputs(self)

	wire.ports[string.format('%s_RPM', self.name)] = self.customWheel:getRPM()
	wire.ports[string.format('%s_Fx', self.name)] = self.customWheel.forwardFriction.force
	wire.ports[string.format('%s_CTq', self.name)] = self.customWheel.counterTorque
end

---@return number
function Wheel:queryInertia()
	return self.customWheel.inertia
end

---@return number
function Wheel:queryAngularVelocity()
	return self.angularVelocity
end

---@param torque number
---@param inertia number
---@return number
function Wheel:forwardStep(torque, inertia)
	if not isValid(self.customWheel) then
		return 0
	end

	self.customWheel.motorTorque = torque
	self.customWheel.brakeTorque = math.max(self.brakePower * self.vehicle.brake, self.handbrakePower * self.vehicle.handbrake)

	self.customWheel:update()

	self.angularVelocity = self.customWheel.angularVelocity

	if self.customWheel.hasHit and isValid(self.vehicle.basePhysObject) then
		local surfaceForceVector = self.customWheel.right * self.customWheel.sideFriction.force
			+ self.customWheel.forward * self.customWheel.forwardFriction.force

		self.vehicle.basePhysObject:applyForceOffset(
			surfaceForceVector,
			self.entity:localToWorld(Vector(0, 0, -self.customWheel.radius * UNITS_PER_METER))
		)
	end

	if isValid(self.holo) then
		-- Step 1: Update rotational state
		self.rot = self.rot + self.angularVelocity * TICK_INTERVAL * self.direction
		self.rot = self.rot % (2 * math.pi)

		-- Step 2: Apply spin (rolling) to forward and up directions
		local spunFwd = self.customWheel.forward:rotateAroundAxis(self.customWheel.right, nil, self.rot)
		local spunUp = self.customWheel.up:rotateAroundAxis(self.customWheel.right, nil, self.rot)

		-- Step 3: Get quaternion from spun directions
		local visualQuat = spunFwd:getQuaternion(spunUp)

		-- Step 4: Apply orientation to holo
		self.holo:setAngles(visualQuat:getEulerAngle())
	end

	return self.customWheel.counterTorque
end

---@return nil
function Wheel:serializeDebugData()
	net.writeEntity(self.entity)
	net.writeFloat(self.customWheel.radius)
	net.writeVector(self.customWheel.forward)
	net.writeVector(self.customWheel.right)
	net.writeVector(self.customWheel.up)
	net.writeFloat(self.customWheel.load)
	net.writeFloat(self.customWheel.forwardFriction.force)
	net.writeFloat(self.customWheel.sideFriction.force)
end

---@param result table
---@return nil
function Wheel:deserializeDebugData(result)
	net.readEntity(function(ent)
		result.entity = ent
	end)
	result.radius = net.readFloat()
	result.forward = net.readVector()
	result.right = net.readVector()
	result.up = net.readVector()
	result.load = net.readFloat()
	result.forwardFrictionForce = net.readFloat()
	result.sideFrictionForce = net.readFloat()
end

return Wheel