Function LuaParticlefxPlay

engine/gui/src/gui_script.cpp:4768–4808

Plays a particle fx * Plays the paricle fx for a gui node * * @name gui.play_particlefx * @param node [type:node] node to play particle fx for * @param [emitter_state_function] [type:function(self, node, emitter, state)] optional callback function that will be called when an emitter attached to this particlefx changes state. * * `self` * : [type:object] The

     * ```
     */
    static int LuaParticlefxPlay(lua_State* L)
    {
        DM_LUA_STACK_CHECK(L, 0);

        HNode hnode;
        Scene* scene = GuiScriptInstance_Check(L);
        LuaCheckNodeInternal(L, 1, &hnode);

        GuiEmitterStateChangedData* script_data = 0;
        if (lua_gettop(L) > 1 && !lua_isnil(L, 2) )
        {
            dmScript::LuaCallbackInfo* callback = dmScript::CreateCallback(L, 2);
            if (callback == 0x0)
            {
                return DM_LUA_ERROR("Could not create callback for particlefx.");
            }

            // if we reached here, the callback was registered
            script_data = (GuiEmitterStateChangedData*)malloc(sizeof(GuiEmitterStateChangedData)); // Released by the particle system (or actually the m_UserData)

            script_data->m_LuaInfo.m_Callback = callback;
            script_data->m_LuaInfo.m_Scene = scene;
            script_data->m_LuaInfo.m_Node = hnode;

            // Point the userdata to itself, for easy deletion later on
            script_data->m_ParticleCallback.m_UserData = script_data; // Released by the particle system
            script_data->m_ParticleCallback.m_StateChangedCallback = EmitterStateChangedCallback;
        }

        dmGui::Result res;
        res = dmGui::PlayNodeParticlefx(scene, hnode, (dmParticle::EmitterStateChangedData*)script_data);

        if (res == RESULT_WRONG_TYPE)
        {
            if (script_data)
                free(script_data);
            return DM_LUA_ERROR("Could not play particlefx on non-particlefx node.");
        }

    	return 0;
    }

    /*# Stops a particle fx
     *