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scriptapi: Sort out ServerEnvironment / Environment distinction properly 
The API implementation is shared between CSM and SSM.
Functions should retrieve a plain env when they do not
need any server-specific functions.
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@sfan5 @nerzhul
sfan5 authored and nerzhul committed Apr 11, 2020
1 parent f105bc8 commit 054c5df
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Showing 7 changed files with 72 additions and 65 deletions.
18 changes: 18 additions & 0 deletions src/environment.cpp
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Expand Up @@ -83,6 +83,24 @@ float Environment::getTimeOfDayF()
return m_time_of_day_f;
}

bool Environment::line_of_sight(v3f pos1, v3f pos2, v3s16 *p)
{
// Iterate trough nodes on the line
voxalgo::VoxelLineIterator iterator(pos1 / BS, (pos2 - pos1) / BS);
do {
MapNode n = getMap().getNode(iterator.m_current_node_pos);

// Return non-air
if (n.param0 != CONTENT_AIR) {
if (p)
*p = iterator.m_current_node_pos;
return false;
}
iterator.next();
} while (iterator.m_current_index <= iterator.m_last_index);
return true;
}

/*
Check if a node is pointable
*/
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10 changes: 10 additions & 0 deletions src/environment.h
View file
Expand Up @@ -76,6 +76,16 @@ class Environment

u32 getDayCount();

/*!
* Returns false if the given line intersects with a
* non-air node, true otherwise.
* \param pos1 start of the line
* \param pos2 end of the line
* \param p output, position of the first non-air node
* the line intersects
*/
bool line_of_sight(v3f pos1, v3f pos2, v3s16 *p = nullptr);

/*!
* Gets the objects pointed by the shootline as
* pointed things.
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50 changes: 16 additions & 34 deletions src/script/lua_api/l_env.cpp
View file
Expand Up @@ -139,8 +139,7 @@ void LuaLBM::trigger(ServerEnvironment *env, v3s16 p, MapNode n)

int LuaRaycast::l_next(lua_State *L)
{
MAP_LOCK_REQUIRED;
GET_ENV_PTR;
GET_PLAIN_ENV_PTR;

bool csm = false;
#ifndef SERVER
Expand Down Expand Up @@ -384,7 +383,7 @@ int ModApiEnvMod::l_get_node_or_nil(lua_State *L)
// timeofday: nil = current time, 0 = night, 0.5 = day
int ModApiEnvMod::l_get_node_light(lua_State *L)
{
GET_ENV_PTR;
GET_PLAIN_ENV_PTR;

// Do it
v3s16 pos = read_v3s16(L, 1);
Expand Down Expand Up @@ -488,10 +487,7 @@ int ModApiEnvMod::l_punch_node(lua_State *L)
// pos = {x=num, y=num, z=num}
int ModApiEnvMod::l_get_node_max_level(lua_State *L)
{
Environment *env = getEnv(L);
if (!env) {
return 0;
}
GET_PLAIN_ENV_PTR;

v3s16 pos = read_v3s16(L, 1);
MapNode n = env->getMap().getNode(pos);
Expand All @@ -503,10 +499,7 @@ int ModApiEnvMod::l_get_node_max_level(lua_State *L)
// pos = {x=num, y=num, z=num}
int ModApiEnvMod::l_get_node_level(lua_State *L)
{
Environment *env = getEnv(L);
if (!env) {
return 0;
}
GET_PLAIN_ENV_PTR;

v3s16 pos = read_v3s16(L, 1);
MapNode n = env->getMap().getNode(pos);
Expand Down Expand Up @@ -551,7 +544,7 @@ int ModApiEnvMod::l_add_node_level(lua_State *L)
// find_nodes_with_meta(pos1, pos2)
int ModApiEnvMod::l_find_nodes_with_meta(lua_State *L)
{
GET_ENV_PTR;
GET_PLAIN_ENV_PTR;

std::vector<v3s16> positions = env->getMap().findNodesWithMetadata(
check_v3s16(L, 1), check_v3s16(L, 2));
Expand Down Expand Up @@ -728,10 +721,7 @@ int ModApiEnvMod::l_set_timeofday(lua_State *L)
// get_timeofday() -> 0...1
int ModApiEnvMod::l_get_timeofday(lua_State *L)
{
Environment *env = getEnv(L);
if (!env) {
return 0;
}
GET_PLAIN_ENV_PTR;

// Do it
int timeofday_mh = env->getTimeOfDay();
Expand All @@ -743,10 +733,7 @@ int ModApiEnvMod::l_get_timeofday(lua_State *L)
// get_day_count() -> int
int ModApiEnvMod::l_get_day_count(lua_State *L)
{
Environment *env = getEnv(L);
if (!env) {
return 0;
}
GET_PLAIN_ENV_PTR;

lua_pushnumber(L, env->getDayCount());
return 1;
Expand All @@ -767,12 +754,9 @@ int ModApiEnvMod::l_get_gametime(lua_State *L)
// nodenames: eg. {"ignore", "group:tree"} or "default:dirt"
int ModApiEnvMod::l_find_node_near(lua_State *L)
{
Environment *env = getEnv(L);
if (!env) {
return 0;
}
GET_PLAIN_ENV_PTR;

const NodeDefManager *ndef = getGameDef(L)->ndef();
const NodeDefManager *ndef = env->getGameDef()->ndef();
v3s16 pos = read_v3s16(L, 1);
int radius = luaL_checkinteger(L, 2);
std::vector<content_t> filter;
Expand Down Expand Up @@ -815,20 +799,19 @@ int ModApiEnvMod::l_find_node_near(lua_State *L)
// nodenames: eg. {"ignore", "group:tree"} or "default:dirt"
int ModApiEnvMod::l_find_nodes_in_area(lua_State *L)
{
GET_ENV_PTR;
GET_PLAIN_ENV_PTR;

v3s16 minp = read_v3s16(L, 1);
v3s16 maxp = read_v3s16(L, 2);
sortBoxVerticies(minp, maxp);

const NodeDefManager *ndef = env->getGameDef()->ndef();

#ifndef SERVER
const NodeDefManager *ndef = getClient(L) ? getClient(L)->ndef() : getServer(L)->ndef();
if (getClient(L)) {
minp = getClient(L)->CSMClampPos(minp);
maxp = getClient(L)->CSMClampPos(maxp);
}
#else
const NodeDefManager *ndef = getServer(L)->ndef();
#endif

v3s16 cube = maxp - minp + 1;
Expand Down Expand Up @@ -892,20 +875,19 @@ int ModApiEnvMod::l_find_nodes_in_area_under_air(lua_State *L)
* TODO
*/

GET_ENV_PTR;
GET_PLAIN_ENV_PTR;

v3s16 minp = read_v3s16(L, 1);
v3s16 maxp = read_v3s16(L, 2);
sortBoxVerticies(minp, maxp);

const NodeDefManager *ndef = env->getGameDef()->ndef();

#ifndef SERVER
const NodeDefManager *ndef = getClient(L) ? getClient(L)->ndef() : getServer(L)->ndef();
if (getClient(L)) {
minp = getClient(L)->CSMClampPos(minp);
maxp = getClient(L)->CSMClampPos(maxp);
}
#else
const NodeDefManager *ndef = getServer(L)->ndef();
#endif

v3s16 cube = maxp - minp + 1;
Expand Down Expand Up @@ -1034,7 +1016,7 @@ int ModApiEnvMod::l_clear_objects(lua_State *L)
// line_of_sight(pos1, pos2) -> true/false, pos
int ModApiEnvMod::l_line_of_sight(lua_State *L)
{
GET_ENV_PTR;
GET_PLAIN_ENV_PTR;

// read position 1 from lua
v3f pos1 = checkFloatPos(L, 1);
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29 changes: 27 additions & 2 deletions src/script/lua_api/l_internal.h
View file
Expand Up @@ -32,14 +32,39 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#define luamethod_aliased(class, name, alias) {#name, class::l_##name}, {#alias, class::l_##name}
#define API_FCT(name) registerFunction(L, #name, l_##name, top)

#define MAP_LOCK_REQUIRED
#define NO_MAP_LOCK_REQUIRED
// For future use
#define MAP_LOCK_REQUIRED ((void)0)
#define NO_MAP_LOCK_REQUIRED ((void)0)

/* In debug mode ensure no code tries to retrieve the server env when it isn't
* actually available (in CSM) */
#if !defined(SERVER) && !defined(NDEBUG)
#define DEBUG_ASSERT_NO_CLIENTAPI \
FATAL_ERROR_IF(getClient(L) != nullptr, "Tried " \
"to retrieve ServerEnvironment on client")
#else
#define DEBUG_ASSERT_NO_CLIENTAPI ((void)0)
#endif

// Retrieve ServerEnvironment pointer as `env` (no map lock)
#define GET_ENV_PTR_NO_MAP_LOCK \
DEBUG_ASSERT_NO_CLIENTAPI; \
ServerEnvironment *env = (ServerEnvironment *)getEnv(L); \
if (env == NULL) \
return 0

// Retrieve ServerEnvironment pointer as `env`
#define GET_ENV_PTR \
MAP_LOCK_REQUIRED; \
GET_ENV_PTR_NO_MAP_LOCK

// Retrieve Environment pointer as `env` (no map lock)
#define GET_PLAIN_ENV_PTR_NO_MAP_LOCK \
Environment *env = (Environment *)getEnv(L); \
if (env == NULL) \
return 0

// Retrieve Environment pointer as `env`
#define GET_PLAIN_ENV_PTR \
MAP_LOCK_REQUIRED; \
GET_PLAIN_ENV_PTR_NO_MAP_LOCK
2 changes: 1 addition & 1 deletion src/script/lua_api/l_object.cpp
View file
Expand Up @@ -533,7 +533,7 @@ int ObjectRef::l_set_local_animation(lua_State *L)
// get_local_animation(self)
int ObjectRef::l_get_local_animation(lua_State *L)
{
NO_MAP_LOCK_REQUIRED
NO_MAP_LOCK_REQUIRED;
ObjectRef *ref = checkobject(L, 1);
RemotePlayer *player = getplayer(ref);
if (player == NULL)
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18 changes: 0 additions & 18 deletions src/serverenvironment.cpp
View file
Expand Up @@ -545,24 +545,6 @@ bool ServerEnvironment::removePlayerFromDatabase(const std::string &name)
return m_player_database->removePlayer(name);
}

bool ServerEnvironment::line_of_sight(v3f pos1, v3f pos2, v3s16 *p)
{
// Iterate trough nodes on the line
voxalgo::VoxelLineIterator iterator(pos1 / BS, (pos2 - pos1) / BS);
do {
MapNode n = getMap().getNode(iterator.m_current_node_pos);

// Return non-air
if (n.param0 != CONTENT_AIR) {
if (p)
*p = iterator.m_current_node_pos;
return false;
}
iterator.next();
} while (iterator.m_current_index <= iterator.m_last_index);
return true;
}

void ServerEnvironment::kickAllPlayers(AccessDeniedCode reason,
const std::string &str_reason, bool reconnect)
{
Expand Down
10 changes: 0 additions & 10 deletions src/serverenvironment.h
View file
Expand Up @@ -334,16 +334,6 @@ class ServerEnvironment : public Environment
// This makes stuff happen
void step(f32 dtime);

/*!
* Returns false if the given line intersects with a
* non-air node, true otherwise.
* \param pos1 start of the line
* \param pos2 end of the line
* \param p output, position of the first non-air node
* the line intersects
*/
bool line_of_sight(v3f pos1, v3f pos2, v3s16 *p = NULL);

u32 getGameTime() const { return m_game_time; }

void reportMaxLagEstimate(float f) { m_max_lag_estimate = f; }
Expand Down

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