274 lines
7.9 KiB
Lua
274 lines
7.9 KiB
Lua
-------------------------------------------------------------------------------
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-- Mob Framework Mod by Sapier
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--
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-- You may copy, use, modify or do nearly anything except removing this
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-- copyright notice.
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-- And of course you are NOT allow to pretend you have written it.
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--
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--! @file path_based_movement_gen.lua
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--! @brief component containing a path based movement generator
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--! @copyright Sapier
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--! @author Sapier
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--! @date 2012-08-09
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--
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--! @defgroup mgen_path_based MGEN: Path based movement generator
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--! @ingroup framework_int
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--! @{
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-- Contact sapier a t gmx net
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-------------------------------------------------------------------------------
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--! @class p_mov_gen
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--! @brief a movement generator evaluating a path to a target and following it
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--!@}
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p_mov_gen = {}
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--! @brief movement generator identifier
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--! @memberof p_mov_gen
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p_mov_gen.name = "mgen_path"
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-------------------------------------------------------------------------------
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-- name: callback(entity,now)
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--
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--! @brief path based movement generator callback
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--! @memberof p_mov_gen
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--
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-- param1: mob to do movement
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-- param2: current time
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-- retval: -
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-------------------------------------------------------------------------------
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function p_mov_gen.callback(entity,now,dstep)
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mobf_assert_backtrace(entity ~= nil)
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mobf_assert_backtrace(entity.dynamic_data ~= nil)
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mobf_assert_backtrace(entity.dynamic_data.p_movement ~= nil)
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if entity.dynamic_data.p_movement.eta ~= nil then
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if now < entity.dynamic_data.p_movement.eta then
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return
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end
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end
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local current_pos = entity.object:getpos()
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local handled = false
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if entity.dynamic_data.p_movement.path == nil then
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dbg_mobf.path_mov_lvl1(
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"MOBF: path movement but mo path set!!")
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return
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end
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local max_distance = entity.data.movement.max_distance
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if entity.dynamic_data.movement.max_distance ~= nil then
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max_distance = entity.dynamic_data.movement.max_distance
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end
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mobf_assert_backtrace(entity.dynamic_data.p_movement.next_path_index ~= nil)
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mobf_assert_backtrace(max_distance ~= nil)
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--check if target is reached
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if p_mov_gen.distance_to_next_point(entity,current_pos)
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< max_distance then
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dbg_mobf.path_mov_lvl1("MOBF: pathmov next to next point switching target")
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local update_target = true
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--return to begining of path
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if entity.dynamic_data.p_movement.next_path_index
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== #entity.dynamic_data.p_movement.path then
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if entity.data.patrol ~= nil and
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entity.data.patrol.cycle_path then
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--0 is correct as it's incremented by one later
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entity.dynamic_data.p_movement.next_path_index = 0
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else
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dbg_mobf.path_mov_lvl1("MOBF: cycle not set not updating point")
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update_target = false
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end
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end
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if update_target then
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entity.dynamic_data.p_movement.next_path_index =
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entity.dynamic_data.p_movement.next_path_index + 1
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entity.dynamic_data.movement.target =
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entity.dynamic_data.p_movement.path
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[entity.dynamic_data.p_movement.next_path_index]
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dbg_mobf.path_mov_lvl1("MOBF: (1) setting new target to index: " ..
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entity.dynamic_data.p_movement.next_path_index .. " pos: " ..
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printpos(entity.dynamic_data.movement.target))
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handled = true
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end
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end
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if not handled and
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entity.dynamic_data.movement.target == nil then
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entity.dynamic_data.movement.target =
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entity.dynamic_data.p_movement.path
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[entity.dynamic_data.p_movement.next_path_index]
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dbg_mobf.path_mov_lvl1("MOBF: (2) setting new target to index: " ..
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entity.dynamic_data.p_movement.next_path_index .. " pos: " ..
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printpos(entity.dynamic_data.movement.target))
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end
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mgen_follow.callback(entity,now)
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end
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-------------------------------------------------------------------------------
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-- name: distance_to_next_point(entity)
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--
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--! @brief get distance to next target point (2d only)
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--! @memberof p_mov_gen
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--! @private
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--
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--! @param entity mob to check
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--! @param current_pos position mob is atm
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--
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--! @retval distance
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-------------------------------------------------------------------------------
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function p_mov_gen.distance_to_next_point(entity,current_pos)
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local index = entity.dynamic_data.p_movement.next_path_index
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mobf_assert_backtrace(entity.dynamic_data.p_movement.path ~= nil)
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mobf_assert_backtrace(index <= #entity.dynamic_data.p_movement.path)
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return mobf_calc_distance_2d(current_pos,
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entity.dynamic_data.p_movement.path[index])
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end
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-------------------------------------------------------------------------------
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-- name: init_dynamic_data(entity,now)
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--
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--! @brief initialize dynamic data required by movement generator
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--! @memberof p_mov_gen
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--
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--! @param entity to initialize
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--! @param now current time
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--! @param restored_data data restored on activate
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-------------------------------------------------------------------------------
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function p_mov_gen.init_dynamic_data(entity,now,restored_data)
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local pos = entity.object:getpos()
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local data = {
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path = nil,
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eta = nil,
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last_move_stop = now,
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next_path_index = 1,
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force_target = nil,
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pathowner = nil,
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pathname = nil,
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}
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if restored_data ~= nil then
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dbg_mobf.path_mov_lvl3(
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"MOBF: path movement reading stored data: " .. dump(restored_data))
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if restored_data.pathowner ~= nil and
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restored_data.pathname ~= nil then
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data.pathowner = restored_data.pathowner
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data.pathname = restored_data.pathname
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data.path = mobf_path.getpoints(data.pathowner,data.pathname)
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dbg_mobf.path_mov_lvl3(
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"MOBF: path movement restored points: " .. dump(data.path))
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end
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if restored_data.pathindex ~= nil and
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type(restored_data.pathindex) == "number" and
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restored_data.pathindex > 0 and
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data.path ~= nil and
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restored_data.pathindex < #data.path then
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data.next_path_index = restored_data.pathindex
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end
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end
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entity.dynamic_data.p_movement = data
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mgen_follow.init_dynamic_data(entity,now)
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end
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-------------------------------------------------------------------------------
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-- name: set_target(entity,target)
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--
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--! @brief set target for movgen
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--! @memberof p_mov_gen
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--! @public
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--
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--! @param entity mob to apply to
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--! @param target to set
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-------------------------------------------------------------------------------
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function p_mov_gen.set_target(entity,target)
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mobf_assert_backtrace(target ~= nil)
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local current_pos = entity.getbasepos(entity)
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local targetpos = nil
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if not mobf_is_pos(target) then
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if target:is_player() then
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targetpos = target:getpos()
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targetpos.y = targetpos.y +0.5
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else
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if type(target.getbasepos) == "function" then
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targetpos = target.getbasepos(target)
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else
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targetpos = target:getpos()
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end
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end
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else
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targetpos = target
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end
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if targetpos == nil then
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return false
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end
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if entity.dynamic_data.p_movement.lasttargetpos ~= nil then
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if mobf_pos_is_same(entity.dynamic_data.p_movement.lasttargetpos,
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targetpos) then
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return true
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end
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end
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entity.dynamic_data.p_movement.lasttargetpos = targetpos
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entity.dynamic_data.p_movement.path = nil
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entity.dynamic_data.p_movement.next_path_index = 1
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--on target mode max distance is always 0.5
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entity.dynamic_data.movement.max_distance = 0.5
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--try to find path on our own
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entity.dynamic_data.p_movement.path =
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minetest.find_path(current_pos,targetpos,5,1,1,nil)
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if entity.dynamic_data.p_movement.path ~= nil then
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--a valid path has at least 2 positions
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mobf_assert_backtrace(#entity.dynamic_data.p_movement.path > 1)
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entity.dynamic_data.movement.target =
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entity.dynamic_data.p_movement.path[2]
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return true
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end
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if entity.dynamic_data.p_movement.path == nil then
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print(
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"MOBF: no pathfinding support/ no path found directly setting targetpos as path")
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entity.dynamic_data.p_movement.path = {}
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table.insert(entity.dynamic_data.p_movement.path,targetpos)
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entity.dynamic_data.movement.target =
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entity.dynamic_data.p_movement.path[1]
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return true
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end
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return false
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end
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--register this movement generator
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registerMovementGen(p_mov_gen.name,p_mov_gen) |