forked from your-land-mirror/cmd_eval
79 lines
2.8 KiB
Lua
79 lines
2.8 KiB
Lua
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-- get actual eye_pos of the player (including eye_offset)
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local function player_get_eye_pos(player)
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local p_pos = player:get_pos()
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local p_eye_height = player:get_properties().eye_height
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p_pos.y = p_pos.y + p_eye_height
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local p_eye_pos = p_pos
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local p_eye_offset = vector.multiply(player:get_eye_offset(), 0.1)
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local yaw = player:get_look_horizontal()
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p_eye_pos = vector.add(p_eye_pos, vector.rotate_around_axis(p_eye_offset, {x=0,y=1,z=0}, yaw))
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return p_eye_pos
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end
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-- return first thing player is pointing at
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local function raycast_crosshair(player, range, point_to_objects, point_to_liquids)
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local p_eye_pos = player_get_eye_pos(player)
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local to = vector.add(p_eye_pos, vector.multiply(player:get_look_dir(), range))
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local ray = core.raycast(p_eye_pos, to, point_to_objects, point_to_liquids)
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local pointed_thing = ray:next()
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while pointed_thing do
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if pointed_thing.type == "object" and pointed_thing.ref == player then
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-- exclude the player themselves from the raycast
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pointed_thing = ray:next()
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else
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return pointed_thing
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end
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end
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-- FIXME return "nothing" pointed thing?
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return nil
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end
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-- return first object
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local function raycast_crosshair_to_object(player, range)
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local p_eye_pos = player_get_eye_pos(player)
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local to = vector.add(p_eye_pos, vector.multiply(player:get_look_dir(), range))
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local ray = core.raycast(p_eye_pos, to, point_to_objects, point_to_liquids)
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local pointed_thing = ray:next()
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while pointed_thing do
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if pointed_thing.type == "object" then
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if pointed_thing.ref ~= player then
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return pointed_thing
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end
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end
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pointed_thing = ray:next()
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end
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-- FIXME return "nothing" pointed thing?
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return nil
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end
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-- get position and thing that player is pointing at or nil
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local function get_pointed_position(player, range, point_to_objects, point_to_liquids)
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local pointed_thing = raycast_crosshair(player, range, point_to_objects, point_to_liquids)
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local pointed_pos = nil
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if pointed_thing then
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if pointed_thing.type == "node" then
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-- middle between "above" and "under"
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pointed_pos = vector.multiply(vector.add(pointed_thing.above, pointed_thing.under), 0.5)
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elseif pointed_thing.type == "object" then
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-- TODO point at the middle of collision box? (or not, ground may be better)
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pointed_pos = pointed_thing.ref:get_pos()
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end
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end
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return pointed_pos, pointed_thing
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end
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local util = {
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player_get_eye_pos = player_get_eye_pos,
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raycast_crosshair = raycast_crosshair,
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raycast_crosshair_to_object = raycast_crosshair_to_object,
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get_pointed_position = get_pointed_position,
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}
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return util
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