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Merge pull request #15 from Thomas--S/positions
PR merged : Allow a greater object offset
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commit
aa319e4144
@ -49,7 +49,10 @@ This is a helper to register entities used for display.
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### Display_entities fields
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`on_display_update` is a callback in charge of setting up entity texture. If not set, entity will have no texture and will be displayed as unknown item.
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`depth`, `right` and `heigh` : Entity position regarding to node facedir/wallmounted main axis. Values for these fields can be any number between -0.5 and 0.5 (default value is 0). Position 0,0,0 is the center of the node. `depth` goes from front (-0.5) to rear (0.5), `height` goes from bottom (-0.5) to top (0.5) and `right` goes from left (-0.5) to right (0.5).
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`depth`, `right` and `height` : Entity position regarding to node facedir/wallmounted main axis.
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Values for these fields can be any number between -1.5 and 1.5 (default value is 0).
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Position 0,0,0 is the center of the node.
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`depth` goes from front (-0.5) to rear (0.5), `height` goes from bottom (-0.5) to top (0.5) and `right` goes from left (-0.5) to right (0.5).
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In order to avoid flickering text, it's better to have text a little behind node surface. A good spacing value is given by `display_api.entity_spacing` variable.
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@ -79,14 +79,25 @@ local function get_values(node)
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end
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end
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--- Checks if the object is related to the given position
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local function check_entity_pos(pos, objref)
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local real_pos = vector.round(objref:get_pos())
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local pos_hash = objref:get_luaentity().pos
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if pos_hash == nil then
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return vector.equals(real_pos, vector.round(pos))
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else
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return vector.equals(minetest.get_position_from_hash(pos_hash), pos)
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end
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end
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--- Gets the display entities attached with a node. Removes extra ones
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local function get_entities(pos)
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local objrefs = {}
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local ndef = minetest.registered_nodes[minetest.get_node(pos).name]
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if ndef and ndef.display_entities then
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for _, objref in ipairs(minetest.get_objects_inside_radius(pos, 0.5)) do
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for _, objref in ipairs(minetest.get_objects_inside_radius(pos, 1.5)) do
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local entity = objref:get_luaentity()
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if entity and ndef.display_entities[entity.name] then
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if entity and ndef.display_entities[entity.name] and check_entity_pos(pos, objref) then
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if objrefs[entity.name] then
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objref:remove()
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else
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@ -100,7 +111,7 @@ end
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local function clip_pos_prop(posprop)
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if posprop then
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return math.max(-0.5, math.min(0.5, posprop))
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return math.max(-1.5, math.min(1.5, posprop))
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else
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return 0
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end
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@ -147,6 +158,7 @@ end
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function display_api.update_entities(pos)
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local objrefs = place_entities(pos)
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for _, objref in pairs(objrefs) do
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objref:get_luaentity().pos = minetest.hash_node_position(pos)
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call_node_on_display_update(pos, objref)
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end
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end
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@ -154,10 +166,22 @@ end
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--- On_activate callback for display_api entities. Calls on_display_update callbacks
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--- of corresponding node for each entity.
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function display_api.on_activate(entity, staticdata)
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if entity then
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entity.object:set_armor_groups({immortal=1})
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call_node_on_display_update(entity.object:getpos(), entity.object)
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end
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if entity then
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if string.sub(staticdata, 1, string.len("return")) == "return" then
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local data = core.deserialize(staticdata)
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if data and type(data) == "table" then
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entity.pos = data.pos
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end
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end
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entity.object:set_armor_groups({immortal=1})
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local pos
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if entity.pos then
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pos = minetest.get_position_from_hash(entity.pos)
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else
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pos = entity.object:getpos()
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end
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display_api.update_entities(pos)
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end
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end
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--- On_place callback for display_api items. Does nothing more than preventing item
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@ -226,6 +250,11 @@ function display_api.register_display_entity(entity_name)
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visual = "upright_sprite",
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textures = {},
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on_activate = display_api.on_activate,
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get_staticdata = function(self)
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return minetest.serialize({
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pos = self.pos,
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})
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end,
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})
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end
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end
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