- some performance updates to fog of war computation

source/glest_game/world/world.cpp

@@ -317,18 +317,19 @@ void World::update(){
 }
 
 bool World::canTickFaction(int factionIdx) {
-	int expectedFactionIdx = (frameCount / (GameConstants::updateFps / GameConstants::maxPlayers));
+	int factionUpdateInterval = (GameConstants::updateFps / GameConstants::maxPlayers);
+	int expectedFactionIdx = (frameCount / factionUpdateInterval) -1;
 	if(expectedFactionIdx >= GameConstants::maxPlayers) {
 		expectedFactionIdx = expectedFactionIdx % GameConstants::maxPlayers;
 	}
 	bool result = (expectedFactionIdx == factionIdx);
 
-	SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] factionIdx = %d, frameCount = %d, GameConstants::updateFps = %d, result = %d\n",__FILE__,__FUNCTION__,__LINE__,factionIdx,frameCount,GameConstants::updateFps,result);
+	SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] factionIdx = %d, frameCount = %d, GameConstants::updateFps = %d, expectedFactionIdx = %d, factionUpdateInterval = %d, result = %d\n",__FILE__,__FUNCTION__,__LINE__,factionIdx,frameCount,GameConstants::updateFps,expectedFactionIdx,factionUpdateInterval,result);
 
 	return result;
 }
 
-void World::tick() {
+int World::tickFactionIndex() {
 	int factionIdxToTick = -1;
 	for(int i=0; i<getFactionCount(); ++i) {
 		if(canTickFaction(i) == true) {
@@ -336,15 +337,25 @@ void World::tick() {
 			break;
 		}
 	}
+
+	SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] factionIdxToTick = %d\n",__FILE__,__FUNCTION__,__LINE__,factionIdxToTick);
+
+	return factionIdxToTick;
+}
+
+void World::tick() {
+	int factionIdxToTick = tickFactionIndex();
 	if(factionIdxToTick < 0) {
 		return;
 	}
 
-	computeFow();
+	computeFow(factionIdxToTick);
 
+	if(factionIdxToTick == 0) {
 		if(fogOfWarSmoothing == false) {
 			minimap.updateFowTex(1.f);
 		}
+	}
 
 	//increase hp
 	int i = factionIdxToTick;
@@ -973,16 +984,21 @@ void World::exploreCells(const Vec2i &newPos, int sightRange, int teamIndex){
 }
 
 //computes the fog of war texture, contained in the minimap
-void World::computeFow(){
+void World::computeFow(int factionIdxToTick) {
 	Chrono chrono;
 	chrono.start();
 
 	//reset texture
+	//if(factionIdxToTick == -1 || factionIdxToTick == 0) {
+	//if(factionIdxToTick == -1 || factionIdxToTick == this->thisFactionIndex) {
+	//if(frameCount % (GameConstants::updateFps) == 0) {
 		minimap.resetFowTex();
+	//}
 
 	if(chrono.getMillis() > 0) SystemFlags::OutputDebug(SystemFlags::debugPerformance,"In [%s::%s] Line: %d took msecs: %lld\n",__FILE__,__FUNCTION__,__LINE__,chrono.getMillis());
 
 	//reset cells
+	if(factionIdxToTick == -1 || factionIdxToTick == this->thisFactionIndex) {
 		for(int i=0; i<map.getSurfaceW(); ++i) {
 			for(int j=0; j<map.getSurfaceH(); ++j) {
 				for(int k=0; k<GameConstants::maxPlayers; ++k) {
@@ -992,11 +1008,13 @@ void World::computeFow(){
 				}
 			}
 		}
+	}
 
 	if(chrono.getMillis() > 0) SystemFlags::OutputDebug(SystemFlags::debugPerformance,"In [%s::%s] Line: %d took msecs: %lld\n",__FILE__,__FUNCTION__,__LINE__,chrono.getMillis());
 
 	//compute cells
 	for(int i=0; i<getFactionCount(); ++i) {
+		if(factionIdxToTick == -1 || factionIdxToTick == this->thisFactionIndex) {
 			for(int j=0; j<getFaction(i)->getUnitCount(); ++j) {
 				Unit *unit= getFaction(i)->getUnit(j);
 
@@ -1006,11 +1024,13 @@ void World::computeFow(){
 				}
 			}
 		}
+	}
 
 	if(chrono.getMillis() > 0) SystemFlags::OutputDebug(SystemFlags::debugPerformance,"In [%s::%s] Line: %d took msecs: %lld\n",__FILE__,__FUNCTION__,__LINE__,chrono.getMillis());
 
 	//fire
 	for(int i=0; i<getFactionCount(); ++i) {
+		if(factionIdxToTick == -1 || factionIdxToTick == this->thisFactionIndex) {
 			for(int j=0; j<getFaction(i)->getUnitCount(); ++j){
 				Unit *unit= getFaction(i)->getUnit(j);
 
@@ -1021,11 +1041,13 @@ void World::computeFow(){
 				}
 			}
 		}
+	}
 
 	if(chrono.getMillis() > 0) SystemFlags::OutputDebug(SystemFlags::debugPerformance,"In [%s::%s] Line: %d took msecs: %lld\n",__FILE__,__FUNCTION__,__LINE__,chrono.getMillis());
 
 	//compute texture
 	for(int i=0; i<getFactionCount(); ++i) {
+		//if(factionIdxToTick == -1 || factionIdxToTick == this->thisFactionIndex) {
 			Faction *faction= getFaction(i);
 			if(faction->getTeam() == thisTeamIndex){
 				for(int j=0; j<faction->getUnitCount(); ++j){
@@ -1036,42 +1058,36 @@ void World::computeFow(){
 						//iterate through all cells
 						PosCircularIterator pci(&map, unit->getPos(), sightRange+indirectSightRange);
 						while(pci.next()){
-						Vec2i pos= pci.getPos();
+							const Vec2i pos= pci.getPos();
 							Vec2i surfPos= Map::toSurfCoords(pos);
 
-
 							//compute max alpha
-						float maxAlpha;
+							float maxAlpha= 0.0f;
 							if(surfPos.x>1 && surfPos.y>1 && surfPos.x<map.getSurfaceW()-2 && surfPos.y<map.getSurfaceH()-2){
 								maxAlpha= 1.f;
 							}
 							else if(surfPos.x>0 && surfPos.y>0 && surfPos.x<map.getSurfaceW()-1 && surfPos.y<map.getSurfaceH()-1){
 								maxAlpha= 0.3f;
 							}
-						else{
-							maxAlpha= 0.0f;
-						}
 
 							//compute alpha
-						float alpha;
+							float alpha=maxAlpha;
 							float dist= unit->getPos().dist(pos);
 							if(dist>sightRange){
 								alpha= clamp(1.f-(dist-sightRange)/(indirectSightRange), 0.f, maxAlpha);
 							}
-						else{
-							alpha= maxAlpha;
-						}
 							minimap.incFowTextureAlphaSurface(surfPos, alpha);
 						}
 					}
 				}
 			}
+		//}
 	}
 
 	if(chrono.getMillis() > 0) SystemFlags::OutputDebug(SystemFlags::debugPerformance,"In [%s::%s] Line: %d took msecs: %lld\n",__FILE__,__FUNCTION__,__LINE__,chrono.getMillis());
 }
 
-// WARNING! This id is critical! MAke sure it fits inside the network packet
+// WARNING! This id is critical! Make sure it fits inside the network packet
 // (currently cannot be larger than 2,147,483,647)
 // Make sure each faction has their own unique section of id #'s for proper
 // multi-platform play

source/glest_game/world/world.h

@@ -201,7 +201,8 @@ private:
 	//misc
 	void tick();
 	bool canTickFaction(int factionIdx);
-	void computeFow();
+	int tickFactionIndex();
+	void computeFow(int factionIdxToTick=-1);
 	void exploreCells(const Vec2i &newPos, int sightRange, int teamIndex);
 
 	void updateAllFactionUnits();