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-rw-r--r--Minecraft.World/Explosion.cpp265
1 files changed, 265 insertions, 0 deletions
diff --git a/Minecraft.World/Explosion.cpp b/Minecraft.World/Explosion.cpp
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+++ b/Minecraft.World/Explosion.cpp
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+#include "stdafx.h"
+#include "net.minecraft.world.entity.h"
+#include "net.minecraft.world.level.h"
+#include "net.minecraft.world.level.tile.h"
+#include "net.minecraft.world.phys.h"
+#include "net.minecraft.world.damagesource.h"
+#include "TilePos.h"
+#include "Explosion.h"
+#include "SoundTypes.h"
+
+Explosion::Explosion(Level *level, shared_ptr<Entity> source, double x, double y, double z, float r)
+{
+ fire = false;
+ random = new Random();
+
+ this->level = level;
+ this->source = source;
+ this->r = r;
+ this->x = x;
+ this->y = y;
+ this->z = z;
+
+ destroyBlocks = true;
+ size = 16;
+}
+
+Explosion::~Explosion()
+{
+ delete random;
+ for(AUTO_VAR(it, hitPlayers.begin()); it != hitPlayers.end(); ++it)
+ {
+ delete it->second;
+ }
+}
+
+void Explosion::explode()
+{
+ float oR = r;
+
+ int size = 16;
+ for (int xx = 0; xx < size; xx++)
+ {
+ for (int yy = 0; yy < size; yy++)
+ {
+ for (int zz = 0; zz < size; zz++)
+ {
+ if ((xx != 0 && xx != size - 1) && (yy != 0 && yy != size - 1) && (zz != 0 && zz != size - 1)) continue;
+
+ double xd = xx / (size - 1.0f) * 2 - 1;
+ double yd = yy / (size - 1.0f) * 2 - 1;
+ double zd = zz / (size - 1.0f) * 2 - 1;
+ double d = sqrt(xd * xd + yd * yd + zd * zd);
+
+ xd /= d;
+ yd /= d;
+ zd /= d;
+
+ float remainingPower = r * (0.7f + level->random->nextFloat() * 0.6f);
+ double xp = x;
+ double yp = y;
+ double zp = z;
+
+ float stepSize = 0.3f;
+ while (remainingPower > 0)
+ {
+ int xt = Mth::floor(xp);
+ int yt = Mth::floor(yp);
+ int zt = Mth::floor(zp);
+ int t = level->getTile(xt, yt, zt);
+ if (t > 0)
+ {
+ remainingPower -= (Tile::tiles[t]->getExplosionResistance(source) + 0.3f) * stepSize;
+ }
+ if (remainingPower > 0)
+ {
+ toBlow.insert(TilePos(xt, yt, zt));
+ }
+
+ xp += xd * stepSize;
+ yp += yd * stepSize;
+ zp += zd * stepSize;
+ remainingPower -= stepSize * 0.75f;
+ }
+ // if (xd*xd+yd*yd+zd*zd>1) continue;
+ }
+ }
+ }
+
+ r *= 2.0f;
+ int x0 = Mth::floor(x - r - 1);
+ int x1 = Mth::floor(x + r + 1);
+ int y0 = Mth::floor(y - r - 1);
+ int y1 = Mth::floor(y + r + 1);
+ int z0 = Mth::floor(z - r - 1);
+ int z1 = Mth::floor(z + r + 1);
+
+ // Fix for 360 #123866 - [CRASH] TU13: Code: Compliance: Placing the TNT next to Ender Crystals will crash the title after a certain amount of time.
+ // If we explode something next to an EnderCrystal then it creates a new explosion that overwrites the shared vector in the level
+ // So copy it here instead of directly using the shared one
+ vector<shared_ptr<Entity> > *levelEntities = level->getEntities(source, AABB::newTemp(x0, y0, z0, x1, y1, z1));
+ vector<shared_ptr<Entity> > entities(levelEntities->begin(), levelEntities->end() );
+ Vec3 *center = Vec3::newTemp(x, y, z);
+
+ AUTO_VAR(itEnd, entities.end());
+ for (AUTO_VAR(it, entities.begin()); it != itEnd; it++)
+ {
+ shared_ptr<Entity> e = *it; //entities->at(i);
+
+ // 4J Stu - If the entity is not in a block that would be blown up, then they should not be damaged
+ // Fix for #46606 - TU5: Content: Gameplay: The player can be damaged and killed by explosions behind obsidian walls
+ bool canDamage = false;
+ for(AUTO_VAR(it2, toBlow.begin()); it2 != toBlow.end(); ++it2)
+ {
+ if(e->bb->intersects(it2->x,it2->y,it2->z,it2->x + 1,it2->y + 1,it2->z + 1))
+ {
+ canDamage = true;
+ break;
+ }
+ }
+
+ double dist = e->distanceTo(x, y, z) / r;
+ if (dist <= 1)
+ {
+ double xa = e->x - x;
+ double ya = e->y + e->getHeadHeight() - y;
+ double za = e->z - z;
+
+ double da = sqrt(xa * xa + ya * ya + za * za);
+
+ // 4J Stu - Added this check to remove divide by zero errors (or rather the issues caused by
+ // the values being set to NaN and used in comparisons a bit later on e.g. fireball)
+ if( da == 0 )
+ {
+ xa = ya = za = 0.0;
+ }
+ else
+ {
+ xa /= da;
+ ya /= da;
+ za /= da;
+ }
+
+ double sp = level->getSeenPercent(center, e->bb);
+ double pow = (1 - dist) * sp;
+ if(canDamage) e->hurt(DamageSource::explosion, (int) ((pow * pow + pow) / 2 * 8 * r + 1));
+
+ double push = pow;
+ e->xd += xa * push;
+ e->yd += ya * push;
+ e->zd += za * push;
+
+ shared_ptr<Player> player = dynamic_pointer_cast<Player>(e);
+ if (player != NULL)
+ {
+ //app.DebugPrintf("Adding player knockback (%f,%f,%f)\n", xa * pow, ya * pow, za * pow);
+ hitPlayers.insert( playerVec3Map::value_type( player, Vec3::newPermanent(xa * pow, ya * pow, za * pow)));
+ }
+ }
+ }
+ r = oR;
+}
+
+
+void Explosion::finalizeExplosion(bool generateParticles, vector<TilePos> *toBlowDirect/*=NULL*/) // 4J - added toBlowDirect parameter
+{
+ level->playSound(x, y, z, eSoundType_RANDOM_EXPLODE, 4, (1 + (level->random->nextFloat() - level->random->nextFloat()) * 0.2f) * 0.7f);
+ level->addParticle(eParticleType_hugeexplosion, x, y, z, 0, 0, 0);
+
+ // 4J - use pointer to vector directly passed in if this is available - used to speed up calling this from an incoming packet
+ vector<TilePos> *toBlowArray = toBlowDirect ? toBlowDirect : new vector<TilePos>( toBlow.begin(), toBlow.end() );
+ //toBlowArray.addAll(toBlow);
+ // TODO 4J Stu - Reverse iterator
+ PIXBeginNamedEvent(0,"Finalizing explosion size %d",toBlow.size());
+ app.DebugPrintf("Finalizing explosion size %d\n",toBlow.size());
+ static const int MAX_EXPLODE_PARTICLES = 50;
+ // 4J - try and make at most MAX_EXPLODE_PARTICLES pairs of particles
+ int fraction = (int)toBlowArray->size() / MAX_EXPLODE_PARTICLES;
+ if( fraction == 0 ) fraction = 1;
+ size_t j = toBlowArray->size() - 1;
+ //for (size_t j = toBlowArray->size() - 1; j >= 0; j--)
+ for(AUTO_VAR(it,toBlowArray->rbegin()); it != toBlowArray->rend(); ++it)
+ {
+ TilePos *tp = &(*it); //&toBlowArray->at(j);
+ int xt = tp->x;
+ int yt = tp->y;
+ int zt = tp->z;
+ // if (xt >= 0 && yt >= 0 && zt >= 0 && xt < width && yt < depth &&
+ // zt < height) {
+ int t = level->getTile(xt, yt, zt);
+
+ if (generateParticles)
+ {
+ if( ( j % fraction ) == 0 )
+ {
+ double xa = xt + level->random->nextFloat();
+ double ya = yt + level->random->nextFloat();
+ double za = zt + level->random->nextFloat();
+
+ double xd = xa - x;
+ double yd = ya - y;
+ double zd = za - z;
+
+ double dd = sqrt(xd * xd + yd * yd + zd * zd);
+
+ xd /= dd;
+ yd /= dd;
+ zd /= dd;
+
+ double speed = 0.5 / (dd / r + 0.1);
+ speed *= (level->random->nextFloat() * level->random->nextFloat() + 0.3f);
+ xd *= speed;
+ yd *= speed;
+ zd *= speed;
+
+ level->addParticle(eParticleType_explode, (xa + x * 1) / 2, (ya + y * 1) / 2, (za + z * 1) / 2, xd, yd, zd);
+ level->addParticle(eParticleType_smoke, xa, ya, za, xd, yd, zd);
+ }
+ }
+
+ if (t > 0)
+ {
+ Tile::tiles[t]->spawnResources(level, xt, yt, zt, level->getData(xt, yt, zt), 0.3f, 0);
+ level->setTile(xt, yt, zt, 0);
+ Tile::tiles[t]->wasExploded(level, xt, yt, zt);
+ }
+ // }
+
+ --j;
+ }
+
+ if (fire)
+ {
+ //for (size_t j = toBlowArray->size() - 1; j >= 0; j--)
+ for(AUTO_VAR(it,toBlowArray->rbegin()); it != toBlowArray->rend(); ++it)
+ {
+ TilePos *tp = &(*it); //&toBlowArray->at(j);
+ int xt = tp->x;
+ int yt = tp->y;
+ int zt = tp->z;
+ int t = level->getTile(xt, yt, zt);
+ int b = level->getTile(xt, yt - 1, zt);
+ if (t == 0 && Tile::solid[b] && random->nextInt(3) == 0)
+ {
+ level->setTile(xt, yt, zt, Tile::fire_Id);
+ }
+ }
+ }
+
+ PIXEndNamedEvent();
+ if( toBlowDirect == NULL ) delete toBlowArray;
+}
+
+Explosion::playerVec3Map *Explosion::getHitPlayers()
+{
+ return &hitPlayers;
+}
+
+Vec3 *Explosion::getHitPlayerKnockback( shared_ptr<Player> player )
+{
+ AUTO_VAR(it, hitPlayers.find(player));
+
+ if(it == hitPlayers.end() ) return Vec3::newTemp(0.0,0.0,0.0);
+
+ return it->second;
+} \ No newline at end of file
generated by cgit v1.2.3 (git 2.46.0) at 2026-03-21 22:49:06 +0000