Implement gravity, move orientation update to own function, fix cart stopping in process_acceleration
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@ -363,20 +363,28 @@ local function register_entity(entity_id, mesh, textures, drop, on_rightclick, o
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local passenger_attach_position = vector.new(0, -1.75, 0)
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local function distance_to_next_block( dir, pos )
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if dir.x == 1 then
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return 1 - ( pos.x - math.floor(pos.x) )
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elseif dir.x == -1 then
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return pos.x - math.floor(pos.x)
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elseif dir.z == 1 then
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return 1 - ( pos.z - math.floor(pos.z) )
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elseif dir.z == -1 then
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return pos.z - math.floor(pos.z)
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elseif dir.y == 1 then
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return 1 - ( pos.y - math.floor(pos.z) )
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local function update_cart_orientation(self,staticdata)
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local rot = self.object:get_rotation()
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local dir = staticdata.dir
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if dir.x < 0 then
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rot.y = 0.5 * math.pi
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elseif dir.x > 0 then
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rot.y = 1.5 * math.pi
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elseif dir.z < 0 then
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rot.y = 1 * math.pi
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else
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return pos.y - math.floor(pos.y)
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rot.y = 0
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end
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-- Forward/backwards tilt (pitch)
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if dir.y < 0 then
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rot.x = -0.25 * math.pi
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elseif dir.y > 0 then
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rot.x = 0.25 * math.pi
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else
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rot.x = 0
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end
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self.object:set_rotation(rot)
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end
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local function do_movement_step(self, remaining_distance)
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@ -419,20 +427,23 @@ local function register_entity(entity_id, mesh, textures, drop, on_rightclick, o
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local under_pos = pos - vector.new(0,1,0)
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local under_node_name = minetest.get_node(under_pos).name
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local under_node_def = minetest.registered_nodes[under_node_name]
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print( "under_node_name="..under_node_name..", hopper="..tostring(under_node_def.groups.hopper))
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if DEBUG then print( "under_node_name="..under_node_name..", hopper="..tostring(under_node_def.groups.hopper)) end
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if under_node_def and under_node_def.groups.hopper ~= 0 then
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print( "Attempt pull_from_minecart" )
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if DEBUG then print( "Attempt pull_from_minecart" ) end
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if mcl_hoppers.pull_from_minecart( self, under_pos, self._inv_size or 0 ) then
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staticdata.delay = 1.5
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end
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end
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-- Get the next direction
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next_dir,last_switch = mcl_minecarts:get_rail_direction(pos, staticdata.dir, nil, nil, staticdata.railtype)
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local next_dir,_ = mcl_minecarts:get_rail_direction(pos, staticdata.dir, nil, nil, staticdata.railtype)
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if DEBUG and next_dir ~= staticdata.dir then
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print( "Changing direction from "..tostring(staticdata.dir).." to "..tostring(next_dir))
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end
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-- Handle end of track
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if next_dir == staticdata.dir * -1 then
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print("Stopping cart at "..tostring(pos))
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if DEBUG then print("Stopping cart at "..tostring(pos)) end
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staticdata.velocity = 0
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distence = remaining_distance
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end
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@ -444,16 +455,7 @@ local function register_entity(entity_id, mesh, textures, drop, on_rightclick, o
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self.object:move_to(pos)
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-- Update cart orientation
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local yaw = 0
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local dir = staticdata.dir
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if dir.x < 0 then
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yaw = 0.5
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elseif dir.x > 0 then
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yaw = 1.5
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elseif dir.z < 0 then
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yaw = 1
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end
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self.object:set_yaw( yaw * math.pi )
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update_cart_orientation(self,staticdata)
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-- Report distance traveled
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return distance
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@ -463,33 +465,39 @@ local function register_entity(entity_id, mesh, textures, drop, on_rightclick, o
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local staticdata = self._staticdata
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if not staticdata.connected_at then return end
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local acceleration = 0
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local friction = 0.1
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if DEBUG and staticdata.velocity > 0 then
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print( " acceleration="..tostring(acceleration)..",velocity="..tostring(staticdata.velocity)..
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",timestep="..tostring(timestep)..
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",dir="..tostring(staticdata.dir))
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end
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local pos = staticdata.connected_at
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local node_name = minetest.get_node(pos).name
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local node_def = minetest.registered_nodes[node_name]
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local max_vel = mcl_minecarts.speed_max
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if self._go_forward then
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self._acceleration = 2
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acceleration = 2
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elseif self._brake then
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self._acceleration = -1.5
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acceleration = -1.5
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elseif self._punched then
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self._acceleration = 2
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if statcdata.velocity < 1 then
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staticdata.velocity = 1
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end
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acceleration = 2
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elseif self._fueltime and self._fueltime > 0 then
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self._acceleration = 0.6
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acceleration = 0.6
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elseif staticdata.velocity >= ( node_def._max_acceleration_velocity or max_vel ) then
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acceleration = 0
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else
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if staticdata.velocity >= ( node_def._max_acceleration_velocity or max_vel ) then
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self._acceleration = 0
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else
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self._acceleration = node_def._rail_acceleration or -0.4
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end
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acceleration = node_def._rail_acceleration or -friction
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end
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if self._acceleration > 0 and (staticdata.velocity or 0) < 0.1 then
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staticdata.velocity = 0.1
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end
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if math.abs(self._acceleration) > 0.1 then
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staticdata.velocity = ( staticdata.velocity or 0 ) + self._acceleration * timestep
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if math.abs(acceleration) > (friction / 5) then
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staticdata.velocity = ( staticdata.velocity or 0 ) + acceleration * timestep
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if staticdata.velocity > max_vel then
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staticdata.velocity = max_vel
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elseif staticdata.velocity < 0.1 then
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@ -497,12 +505,47 @@ local function register_entity(entity_id, mesh, textures, drop, on_rightclick, o
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end
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end
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if DEBUG and staticdata.velocity > 0 then
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print( " acceleration="..tostring(self._acceleration)..",velocity="..tostring(staticdata.velocity)..
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",timestep="..tostring(timestep))
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-- Factor in gravity after everything else
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local gravity_accel = 0
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local gravity_strength = friction + 0.2
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if staticdata.dir.y < 0 then
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gravity_accel = gravity_strength
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elseif staticdata.dir.y > 0 then
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gravity_accel = -gravity_strength
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end
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if DEBUG and gravity_accel ~= 0 then
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print("gravity_accel="..tostring(gravity_accel))
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end
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if gravity_accel ~= 0 then
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staticdata.velocity = (staticdata.velocity or 0) + gravity_accel
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if staticdata.velocity < 0 then
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if DEBUG then
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print("Gravity flipped direction")
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end
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staticdata.velocity = staticdata.velocity * -1
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-- Update direction
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local next_dir,_ = mcl_minecarts:get_rail_direction(pos + staticdata.dir, staticdata.dir * -1, nil, nil, staticdata.railtype)
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if DEBUG and next_dir ~= staticdata.dir then
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print( "Changing direction from "..tostring(staticdata.dir).." to "..tostring(next_dir))
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end
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staticdata.dir = next_dir
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update_cart_orientation(self,staticdata)
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end
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end
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-- Force the cart to stop if moving slowly enough
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if (staticdata.velocity or 0) < 0.1 then
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staticdata.velocity = 0
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end
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if DEBUG and staticdata.velocity > 0 then
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print( " acceleration="..tostring(acceleration)..",velocity="..tostring(staticdata.velocity)..
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",timestep="..tostring(timestep)..
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",dir="..tostring(staticdata.dir))
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end
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end
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local function do_movement( self, dtime )
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local staticdata = self._staticdata
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@ -523,6 +566,11 @@ local function register_entity(entity_id, mesh, textures, drop, on_rightclick, o
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process_acceleration(self,dtime * max_step_distance / total_distance)
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-- Skip processing stopped railcarts
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if not staticdata.velocity or math.abs(staticdata.velocity) < 0.05 then
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return
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end
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while remaining_distance > 0.1 do
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local step_distance = do_movement_step(self, remaining_distance)
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if step_distance > 0.1 then
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