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TNT Changes (#4970) 

+ Make TNT drop pickups, change a few comments.
+ Give each ray random intensity, instead of each explosion.
* Use direction instead of destination, rewrite for pairs of edges.
This commit is contained in:
KingCol13 2020-10-24 20:48:48 +03:00 committed by GitHub
parent 64442b05f8
commit c11ca96c3d
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 80 additions and 49 deletions
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9
src/BlockInfo.cpp
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@ -134,6 +134,15 @@ bool IsBlockFence(BLOCKTYPE a_BlockType)
bool IsBlockShulkerBox(BLOCKTYPE a_BlockType)
{
return ((a_BlockType >= E_BLOCK_WHITE_SHULKER_BOX) && (a_BlockType <= E_BLOCK_BLACK_SHULKER_BOX));
}
bool IsBlockMaterialWood(BLOCKTYPE a_BlockType)
{
switch (a_BlockType)

2
src/BlockInfo.h
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@ -86,6 +86,8 @@ bool IsBlockTypeOfDirt(BLOCKTYPE a_BlockType);
bool IsBlockFence(BLOCKTYPE a_BlockType);
bool IsBlockShulkerBox(BLOCKTYPE a_BlockType);
bool IsBlockMaterialWood(BLOCKTYPE a_BlockType);
bool IsBlockMaterialPlants(BLOCKTYPE a_BlockType);

115
src/Physics/Explodinator.cpp
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@ -92,17 +92,44 @@ namespace Explodinator
Entity.TakeDamage(dtExplosion, nullptr, FloorC(Damage), 0);
}
// Impact reduced by armour:
const auto ReducedImpact = Impact - Impact * Entity.GetEnchantmentBlastKnockbackReduction(); // TODO: call is very expensive, should only apply to Pawns
Entity.SetSpeed(Direction.NormalizeCopy() * KnockbackFactor * ReducedImpact);
// Impact reduced by armour, expensive call so only apply to Pawns:
if (Entity.IsPawn())
{
const auto ReducedImpact = Impact - Impact * Entity.GetEnchantmentBlastKnockbackReduction();
Entity.SetSpeed(Direction.NormalizeCopy() * KnockbackFactor * ReducedImpact);
}
else
{
Entity.SetSpeed(Direction.NormalizeCopy() * KnockbackFactor * Impact);
}
// Continue iteration:
return false;
});
}
/** Returns true if block should always drop when exploded.
Currently missing conduits from 1.13 */
static bool BlockAlwaysDrops(const BLOCKTYPE a_Block)
{
// If it's a Shulker box
if (IsBlockShulkerBox(a_Block))
{
return true;
}
switch (a_Block)
{
case E_BLOCK_DRAGON_EGG:
case E_BLOCK_BEACON:
case E_BLOCK_HEAD: return true;
}
return false;
}
/** Sets the block at the given position, updating surroundings. */
static void DestroyBlock(cWorld & a_World, cChunk & a_Chunk, const Vector3i a_AbsolutePosition, const Vector3i a_RelativePosition, const BLOCKTYPE a_DestroyedBlock, const BLOCKTYPE a_NewBlock, const cEntity * const a_ExplodingEntity)
static void SetBlock(cWorld & a_World, cChunk & a_Chunk, const Vector3i a_AbsolutePosition, const Vector3i a_RelativePosition, const BLOCKTYPE a_DestroyedBlock, const BLOCKTYPE a_NewBlock, const cEntity * const a_ExplodingEntity)
{
const auto DestroyedMeta = a_Chunk.GetMeta(a_RelativePosition);
@ -116,7 +143,8 @@ namespace Explodinator
cBlockHandler::For(a_DestroyedBlock).OnBroken(Interface, a_World, a_AbsolutePosition, a_DestroyedBlock, DestroyedMeta, a_ExplodingEntity);
}
/** Sets the block at the given Position to air, updates surroundings, and spawns pickups, fire, shrapnel according to Minecraft rules.
/** Work out what should happen when an explosion destroys the given block.
Tasks include lighting TNT, dropping pickups, setting fire and flinging shrapnel according to Minecraft rules.
OK, _mostly_ Minecraft rules. */
static void DestroyBlock(cChunk & a_Chunk, const Vector3i a_Position, const unsigned a_Power, const bool a_Fiery, const cEntity * const a_ExplodingEntity)
{
@ -131,7 +159,8 @@ namespace Explodinator
auto & World = *a_Chunk.GetWorld();
auto & Random = GetRandomProvider();
const auto Absolute = cChunkDef::RelativeToAbsolute(a_Position, a_Chunk.GetPos());
if (DestroyedBlock == E_BLOCK_TNT)
if (DestroyedBlock == E_BLOCK_TNT) // If the block is TNT we should set it off
{
// Random fuse between 10 to 30 game ticks.
const int FuseTime = Random.RandInt(10, 30);
@ -139,7 +168,7 @@ namespace Explodinator
// Activate the TNT, with initial velocity and no fuse sound:
World.SpawnPrimedTNT(Vector3d(0.5, 0, 0.5) + Absolute, FuseTime, 1, false);
}
else if (Random.RandBool(1.f / a_Power))
else if (a_ExplodingEntity->IsTNT() || BlockAlwaysDrops(DestroyedBlock) || Random.RandBool(1.f / a_Power)) // For TNT explosions, destroying a block that always drops, or if RandBool, drop pickups
{
const auto DestroyedMeta = a_Chunk.GetMeta(a_Position);
a_Chunk.GetWorld()->SpawnItemPickups(cBlockHandler::For(DestroyedBlock).ConvertToPickups(DestroyedMeta), Absolute);
@ -150,11 +179,11 @@ namespace Explodinator
if ((Below.y >= 0) && cBlockInfo::FullyOccupiesVoxel(a_Chunk.GetBlock(Below)))
{
// Start a fire:
DestroyBlock(World, a_Chunk, Absolute, a_Position, DestroyedBlock, E_BLOCK_FIRE, a_ExplodingEntity);
SetBlock(World, a_Chunk, Absolute, a_Position, DestroyedBlock, E_BLOCK_FIRE, a_ExplodingEntity);
return;
}
}
else if (const auto Shrapnel = World.GetTNTShrapnelLevel(); (Shrapnel > slNone) && Random.RandBool(0)) // 20% chance of flinging stuff around
else if (const auto Shrapnel = World.GetTNTShrapnelLevel(); (Shrapnel > slNone) && Random.RandBool(0)) // Currently 0% chance of flinging stuff around
{
// If the block is shrapnel-able, make a falling block entity out of it:
if (
@ -169,23 +198,20 @@ namespace Explodinator
}
}
DestroyBlock(World, a_Chunk, Absolute, a_Position, DestroyedBlock, E_BLOCK_AIR, a_ExplodingEntity);
SetBlock(World, a_Chunk, Absolute, a_Position, DestroyedBlock, E_BLOCK_AIR, a_ExplodingEntity);
}
/** Traces the path taken by one Explosion Lazor (tm) with given direction and intensity, that will destroy blocks until it is exhausted. */
static void DestructionTrace(cChunk * a_Chunk, Vector3f a_Origin, const Vector3f a_Destination, const unsigned a_Power, const bool a_Fiery, float a_Intensity, const cEntity * const a_ExplodingEntity)
static void DestructionTrace(cChunk * a_Chunk, Vector3f a_Origin, const Vector3f a_Direction, const unsigned a_Power, const bool a_Fiery, float a_Intensity, const cEntity * const a_ExplodingEntity)
{
// The current position the ray is at.
auto Checkpoint = a_Origin;
// The total displacement the ray must travel.
const auto TraceDisplacement = (a_Destination - a_Origin);
// The displacement that the ray in one iteration step should travel.
const auto Step = a_Direction.NormalizeCopy() * StepUnit;
// The displacement that they ray in one iteration step should travel.
const auto Step = TraceDisplacement.NormalizeCopy() * StepUnit;
// Loop until we've reached the prescribed destination:
while (TraceDisplacement > (Checkpoint - a_Origin))
// Loop until intensity runs out:
while (a_Intensity > 0)
{
auto Position = Checkpoint.Floor();
if (!cChunkDef::IsValidHeight(Position.y))
@ -219,54 +245,49 @@ namespace Explodinator
}
}
/** Returns a random intensity for an Explosion Lazor (tm) as a function of the explosion's power. */
static float RandomIntensity(MTRand & a_Random, const unsigned a_Power)
{
return a_Power * (0.7f + a_Random.RandReal(0.6f));
}
/** Sends out Explosion Lazors (tm) originating from the given position that destroy blocks. */
static void DamageBlocks(cChunk & a_Chunk, const Vector3f a_Position, const unsigned a_Power, const bool a_Fiery, const cEntity * const a_ExplodingEntity)
{
const auto Intensity = a_Power * (0.7f + GetRandomProvider().RandReal(0.6f));
const auto ExplosionRadius = CeilC((Intensity / StepAttenuation) * StepUnit);
// Oh boy... Better hope you have a hot cache, 'cos this little manoeuvre's gonna cost us 1352 raytraces in one tick...
const int HalfSide = TraceCubeSideLength / 2;
auto & Random = GetRandomProvider();
// The following loops implement the tracing algorithm described in http://minecraft.gamepedia.com/Explosion
// Trace rays from the explosion centre to all points in a square of area TraceCubeSideLength * TraceCubeSideLength
// in the YM and YP directions:
// for the top and bottom sides:
for (int OffsetX = -HalfSide; OffsetX < HalfSide; OffsetX++)
{
for (int OffsetZ = -HalfSide; OffsetZ < HalfSide; OffsetZ++)
{
DestructionTrace(&a_Chunk, a_Position, a_Position + Vector3f(OffsetX, +ExplosionRadius, OffsetZ), a_Power, a_Fiery, Intensity, a_ExplodingEntity);
DestructionTrace(&a_Chunk, a_Position, a_Position + Vector3f(OffsetX, -ExplosionRadius, OffsetZ), a_Power, a_Fiery, Intensity, a_ExplodingEntity);
DestructionTrace(&a_Chunk, a_Position, Vector3f(OffsetX, +1, OffsetZ), a_Power, a_Fiery, RandomIntensity(Random, a_Power), a_ExplodingEntity);
DestructionTrace(&a_Chunk, a_Position, Vector3f(OffsetX, -1, OffsetZ), a_Power, a_Fiery, RandomIntensity(Random, a_Power), a_ExplodingEntity);
}
}
/*
Trace rays from the centre to the sides of the explosion cube, being careful to avoid duplicates:
Top view:
______
. | (dot to make style checker happy)
| |
| |
| ______
Side view:
+ +
|====== |
| | |
|====== |
+ +
*/
for (int Offset = -HalfSide; Offset < HalfSide - 1; Offset++)
// Left and right sides, avoid duplicates at top and bottom edges:
for (int OffsetX = -HalfSide; OffsetX < HalfSide; OffsetX++)
{
for (int OffsetY = -HalfSide + 1; OffsetY < HalfSide - 1; OffsetY++)
{
DestructionTrace(&a_Chunk, a_Position, a_Position + Vector3f(ExplosionRadius, OffsetY, Offset + 1), a_Power, a_Fiery, Intensity, a_ExplodingEntity);
DestructionTrace(&a_Chunk, a_Position, a_Position + Vector3f(-ExplosionRadius, OffsetY, Offset), a_Power, a_Fiery, Intensity, a_ExplodingEntity);
DestructionTrace(&a_Chunk, a_Position, a_Position + Vector3f(Offset, OffsetY, ExplosionRadius), a_Power, a_Fiery, Intensity, a_ExplodingEntity);
DestructionTrace(&a_Chunk, a_Position, a_Position + Vector3f(Offset + 1, OffsetY, -ExplosionRadius), a_Power, a_Fiery, Intensity, a_ExplodingEntity);
DestructionTrace(&a_Chunk, a_Position, Vector3f(OffsetX, OffsetY, +1), a_Power, a_Fiery, RandomIntensity(Random, a_Power), a_ExplodingEntity);
DestructionTrace(&a_Chunk, a_Position, Vector3f(OffsetX, OffsetY, -1), a_Power, a_Fiery, RandomIntensity(Random, a_Power), a_ExplodingEntity);
}
}
// Front and back sides, avoid all edges:
for (int OffsetZ = -HalfSide + 1; OffsetZ < HalfSide - 1; OffsetZ++)
{
for (int OffsetY = -HalfSide + 1; OffsetY < HalfSide - 1; OffsetY++)
{
DestructionTrace(&a_Chunk, a_Position, Vector3f(+1, OffsetY, OffsetZ), a_Power, a_Fiery, RandomIntensity(Random, a_Power), a_ExplodingEntity);
DestructionTrace(&a_Chunk, a_Position, Vector3f(-1, OffsetY, OffsetZ), a_Power, a_Fiery, RandomIntensity(Random, a_Power), a_ExplodingEntity);
}
}
}

3
src/World.cpp
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@ -1390,10 +1390,9 @@ bool cWorld::ForEachFurnaceInChunk(int a_ChunkX, int a_ChunkZ, cFurnaceCallback
void cWorld::DoExplosionAt(double a_ExplosionSize, double a_BlockX, double a_BlockY, double a_BlockZ, bool a_CanCauseFire, eExplosionSource a_Source, void * a_SourceData)
{
cLock Lock(*this);
if (!cPluginManager::Get()->CallHookExploding(*this, a_ExplosionSize, a_CanCauseFire, a_BlockX, a_BlockY, a_BlockZ, a_Source, a_SourceData) && (a_ExplosionSize > 0))
{
// TODO: CanCauseFire gets reset to false for some reason
// TODO: CanCauseFire gets reset to false for some reason, (plugin has ability to change it, might be related)
const cEntity * Entity;
switch (a_Source)