Line data Source code
1 : /*
2 : Minetest
3 : Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
4 :
5 : This program is free software; you can redistribute it and/or modify
6 : it under the terms of the GNU Lesser General Public License as published by
7 : the Free Software Foundation; either version 2.1 of the License, or
8 : (at your option) any later version.
9 :
10 : This program is distributed in the hope that it will be useful,
11 : but WITHOUT ANY WARRANTY; without even the implied warranty of
12 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 : GNU Lesser General Public License for more details.
14 :
15 : You should have received a copy of the GNU Lesser General Public License along
16 : with this program; if not, write to the Free Software Foundation, Inc.,
17 : 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 : */
19 :
20 : #include "cpp_api/s_entity.h"
21 : #include "cpp_api/s_internal.h"
22 : #include "log.h"
23 : #include "object_properties.h"
24 : #include "common/c_converter.h"
25 : #include "common/c_content.h"
26 :
27 0 : bool ScriptApiEntity::luaentity_Add(u16 id, const char *name)
28 : {
29 0 : SCRIPTAPI_PRECHECKHEADER
30 :
31 0 : verbosestream<<"scriptapi_luaentity_add: id="<<id<<" name=\""
32 0 : <<name<<"\""<<std::endl;
33 :
34 : // Get core.registered_entities[name]
35 0 : lua_getglobal(L, "core");
36 0 : lua_getfield(L, -1, "registered_entities");
37 0 : luaL_checktype(L, -1, LUA_TTABLE);
38 0 : lua_pushstring(L, name);
39 0 : lua_gettable(L, -2);
40 : // Should be a table, which we will use as a prototype
41 : //luaL_checktype(L, -1, LUA_TTABLE);
42 0 : if (lua_type(L, -1) != LUA_TTABLE){
43 0 : errorstream<<"LuaEntity name \""<<name<<"\" not defined"<<std::endl;
44 0 : return false;
45 : }
46 0 : int prototype_table = lua_gettop(L);
47 : //dump2(L, "prototype_table");
48 :
49 : // Create entity object
50 0 : lua_newtable(L);
51 0 : int object = lua_gettop(L);
52 :
53 : // Set object metatable
54 0 : lua_pushvalue(L, prototype_table);
55 0 : lua_setmetatable(L, -2);
56 :
57 : // Add object reference
58 : // This should be userdata with metatable ObjectRef
59 0 : objectrefGet(L, id);
60 0 : luaL_checktype(L, -1, LUA_TUSERDATA);
61 0 : if (!luaL_checkudata(L, -1, "ObjectRef"))
62 0 : luaL_typerror(L, -1, "ObjectRef");
63 0 : lua_setfield(L, -2, "object");
64 :
65 : // core.luaentities[id] = object
66 0 : lua_getglobal(L, "core");
67 0 : lua_getfield(L, -1, "luaentities");
68 0 : luaL_checktype(L, -1, LUA_TTABLE);
69 0 : lua_pushnumber(L, id); // Push id
70 0 : lua_pushvalue(L, object); // Copy object to top of stack
71 0 : lua_settable(L, -3);
72 :
73 0 : return true;
74 : }
75 :
76 0 : void ScriptApiEntity::luaentity_Activate(u16 id,
77 : const std::string &staticdata, u32 dtime_s)
78 : {
79 0 : SCRIPTAPI_PRECHECKHEADER
80 :
81 0 : verbosestream << "scriptapi_luaentity_activate: id=" << id << std::endl;
82 :
83 : // Get core.luaentities[id]
84 0 : luaentity_get(L, id);
85 0 : int object = lua_gettop(L);
86 :
87 : // Get on_activate function
88 0 : lua_getfield(L, -1, "on_activate");
89 0 : if (!lua_isnil(L, -1)) {
90 0 : luaL_checktype(L, -1, LUA_TFUNCTION);
91 0 : lua_pushvalue(L, object); // self
92 0 : lua_pushlstring(L, staticdata.c_str(), staticdata.size());
93 0 : lua_pushinteger(L, dtime_s);
94 : // Call with 3 arguments, 0 results
95 0 : if (lua_pcall(L, 3, 0, m_errorhandler))
96 0 : scriptError();
97 : } else {
98 0 : lua_pop(L, 1);
99 : }
100 0 : lua_pop(L, 1); // Pop object
101 0 : }
102 :
103 0 : void ScriptApiEntity::luaentity_Remove(u16 id)
104 : {
105 0 : SCRIPTAPI_PRECHECKHEADER
106 :
107 0 : verbosestream << "scriptapi_luaentity_rm: id=" << id << std::endl;
108 :
109 : // Get core.luaentities table
110 0 : lua_getglobal(L, "core");
111 0 : lua_getfield(L, -1, "luaentities");
112 0 : luaL_checktype(L, -1, LUA_TTABLE);
113 0 : int objectstable = lua_gettop(L);
114 :
115 : // Set luaentities[id] = nil
116 0 : lua_pushnumber(L, id); // Push id
117 0 : lua_pushnil(L);
118 0 : lua_settable(L, objectstable);
119 :
120 0 : lua_pop(L, 2); // pop luaentities, core
121 0 : }
122 :
123 0 : std::string ScriptApiEntity::luaentity_GetStaticdata(u16 id)
124 : {
125 0 : SCRIPTAPI_PRECHECKHEADER
126 :
127 : //infostream<<"scriptapi_luaentity_get_staticdata: id="<<id<<std::endl;
128 :
129 : // Get core.luaentities[id]
130 0 : luaentity_get(L, id);
131 0 : int object = lua_gettop(L);
132 :
133 : // Get get_staticdata function
134 0 : lua_getfield(L, -1, "get_staticdata");
135 0 : if (lua_isnil(L, -1)) {
136 0 : lua_pop(L, 2); // Pop entity and get_staticdata
137 0 : return "";
138 : }
139 :
140 0 : luaL_checktype(L, -1, LUA_TFUNCTION);
141 0 : lua_pushvalue(L, object); // self
142 : // Call with 1 arguments, 1 results
143 0 : if (lua_pcall(L, 1, 1, m_errorhandler))
144 0 : scriptError();
145 0 : lua_remove(L, object); // Remove object
146 :
147 0 : size_t len = 0;
148 0 : const char *s = lua_tolstring(L, -1, &len);
149 0 : lua_pop(L, 1); // Pop static data
150 0 : return std::string(s, len);
151 : }
152 :
153 0 : void ScriptApiEntity::luaentity_GetProperties(u16 id,
154 : ObjectProperties *prop)
155 : {
156 0 : SCRIPTAPI_PRECHECKHEADER
157 :
158 : //infostream<<"scriptapi_luaentity_get_properties: id="<<id<<std::endl;
159 :
160 : // Get core.luaentities[id]
161 0 : luaentity_get(L, id);
162 :
163 : // Set default values that differ from ObjectProperties defaults
164 0 : prop->hp_max = 10;
165 :
166 : /* Read stuff */
167 :
168 0 : prop->hp_max = getintfield_default(L, -1, "hp_max", 10);
169 :
170 0 : getboolfield(L, -1, "physical", prop->physical);
171 0 : getboolfield(L, -1, "collide_with_objects", prop->collideWithObjects);
172 :
173 0 : getfloatfield(L, -1, "weight", prop->weight);
174 :
175 0 : lua_getfield(L, -1, "collisionbox");
176 0 : if (lua_istable(L, -1))
177 0 : prop->collisionbox = read_aabb3f(L, -1, 1.0);
178 0 : lua_pop(L, 1);
179 :
180 0 : getstringfield(L, -1, "visual", prop->visual);
181 :
182 0 : getstringfield(L, -1, "mesh", prop->mesh);
183 :
184 : // Deprecated: read object properties directly
185 0 : read_object_properties(L, -1, prop);
186 :
187 : // Read initial_properties
188 0 : lua_getfield(L, -1, "initial_properties");
189 0 : read_object_properties(L, -1, prop);
190 0 : lua_pop(L, 1);
191 0 : }
192 :
193 0 : void ScriptApiEntity::luaentity_Step(u16 id, float dtime)
194 : {
195 0 : SCRIPTAPI_PRECHECKHEADER
196 :
197 : //infostream<<"scriptapi_luaentity_step: id="<<id<<std::endl;
198 :
199 : // Get core.luaentities[id]
200 0 : luaentity_get(L, id);
201 0 : int object = lua_gettop(L);
202 : // State: object is at top of stack
203 : // Get step function
204 0 : lua_getfield(L, -1, "on_step");
205 0 : if (lua_isnil(L, -1)) {
206 0 : lua_pop(L, 2); // Pop on_step and entity
207 0 : return;
208 : }
209 0 : luaL_checktype(L, -1, LUA_TFUNCTION);
210 0 : lua_pushvalue(L, object); // self
211 0 : lua_pushnumber(L, dtime); // dtime
212 : // Call with 2 arguments, 0 results
213 0 : if (lua_pcall(L, 2, 0, m_errorhandler))
214 0 : scriptError();
215 0 : lua_pop(L, 1); // Pop object
216 : }
217 :
218 : // Calls entity:on_punch(ObjectRef puncher, time_from_last_punch,
219 : // tool_capabilities, direction)
220 0 : void ScriptApiEntity::luaentity_Punch(u16 id,
221 : ServerActiveObject *puncher, float time_from_last_punch,
222 : const ToolCapabilities *toolcap, v3f dir)
223 : {
224 0 : SCRIPTAPI_PRECHECKHEADER
225 :
226 : //infostream<<"scriptapi_luaentity_step: id="<<id<<std::endl;
227 :
228 : // Get core.luaentities[id]
229 0 : luaentity_get(L,id);
230 0 : int object = lua_gettop(L);
231 : // State: object is at top of stack
232 : // Get function
233 0 : lua_getfield(L, -1, "on_punch");
234 0 : if (lua_isnil(L, -1)) {
235 0 : lua_pop(L, 2); // Pop on_punch and entitu
236 0 : return;
237 : }
238 0 : luaL_checktype(L, -1, LUA_TFUNCTION);
239 0 : lua_pushvalue(L, object); // self
240 0 : objectrefGetOrCreate(L, puncher); // Clicker reference
241 0 : lua_pushnumber(L, time_from_last_punch);
242 0 : push_tool_capabilities(L, *toolcap);
243 0 : push_v3f(L, dir);
244 : // Call with 5 arguments, 0 results
245 0 : if (lua_pcall(L, 5, 0, m_errorhandler))
246 0 : scriptError();
247 0 : lua_pop(L, 1); // Pop object
248 : }
249 :
250 : // Calls entity:on_rightclick(ObjectRef clicker)
251 0 : void ScriptApiEntity::luaentity_Rightclick(u16 id,
252 : ServerActiveObject *clicker)
253 : {
254 0 : SCRIPTAPI_PRECHECKHEADER
255 :
256 : //infostream<<"scriptapi_luaentity_step: id="<<id<<std::endl;
257 :
258 : // Get core.luaentities[id]
259 0 : luaentity_get(L, id);
260 0 : int object = lua_gettop(L);
261 : // State: object is at top of stack
262 : // Get function
263 0 : lua_getfield(L, -1, "on_rightclick");
264 0 : if (lua_isnil(L, -1)) {
265 0 : lua_pop(L, 2); // Pop on_rightclick and entity
266 0 : return;
267 : }
268 0 : luaL_checktype(L, -1, LUA_TFUNCTION);
269 0 : lua_pushvalue(L, object); // self
270 0 : objectrefGetOrCreate(L, clicker); // Clicker reference
271 : // Call with 2 arguments, 0 results
272 0 : if (lua_pcall(L, 2, 0, m_errorhandler))
273 0 : scriptError();
274 0 : lua_pop(L, 1); // Pop object
275 3 : }
276 :
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