Implemented explosions (#562)

server/block/ancient_debris.go

@@ -13,7 +13,7 @@ type AncientDebris struct {
 func (a AncientDebris) BreakInfo() BreakInfo {
 	return newBreakInfo(30, func(t item.Tool) bool {
 		return t.ToolType() == item.TypePickaxe && t.HarvestLevel() >= item.ToolTierDiamond.HarvestLevel
-	}, pickaxeEffective, oneOf(a))
+	}, pickaxeEffective, oneOf(a)).withBlastResistance(3600)
 }
 
 // SmeltInfo ...

server/block/anvil.go

@@ -27,7 +27,7 @@ func (a Anvil) Model() world.BlockModel {
 
 // BreakInfo ...
 func (a Anvil) BreakInfo() BreakInfo {
-	return newBreakInfo(5, pickaxeHarvestable, pickaxeEffective, oneOf(a))
+	return newBreakInfo(5, pickaxeHarvestable, pickaxeEffective, oneOf(a)).withBlastResistance(6000)
 }
 
 // Activate ...

server/block/basalt.go

@@ -32,7 +32,7 @@ func (b Basalt) UseOnBlock(pos cube.Pos, face cube.Face, _ mgl64.Vec3, w *world.
 
 // BreakInfo ...
 func (b Basalt) BreakInfo() BreakInfo {
-	return newBreakInfo(1.25, pickaxeHarvestable, pickaxeEffective, oneOf(b))
+	return newBreakInfo(1.25, pickaxeHarvestable, pickaxeEffective, oneOf(b)).withBlastResistance(21)
 }
 
 // EncodeItem ...

server/block/block.go

@@ -3,10 +3,12 @@ package block
 import (
 	"github.com/df-mc/dragonfly/server/block/cube"
 	"github.com/df-mc/dragonfly/server/block/model"
-	"github.com/df-mc/dragonfly/server/entity"
+	"github.com/df-mc/dragonfly/server/entity/damage"
 	"github.com/df-mc/dragonfly/server/item"
 	"github.com/df-mc/dragonfly/server/world"
 	"github.com/df-mc/dragonfly/server/world/sound"
+	"github.com/go-gl/mathgl/mgl64"
+	"math/rand"
 	"time"
 )
 
@@ -84,7 +86,7 @@ func calculateFace(user item.User, placePos cube.Pos) cube.Face {
 	pos := cube.PosFromVec3(userPos)
 	if abs(pos[0]-placePos[0]) < 2 && abs(pos[2]-placePos[2]) < 2 {
 		y := userPos[1]
-		if eyed, ok := user.(entity.Eyed); ok {
+		if eyed, ok := user.(interface{ EyeHeight() float64 }); ok {
 			y += eyed.EyeHeight()
 		}
 
@@ -203,7 +205,17 @@ func (g gravityAffected) fall(b world.Block, pos cube.Pos, w *world.World) {
 	_, liquid := w.Liquid(pos.Side(cube.FaceDown))
 	if air || liquid {
 		w.SetBlock(pos, nil, nil)
-		w.AddEntity(entity.NewFallingBlock(b, pos.Vec3Middle()))
+
+		ent, ok := world.EntityByName("minecraft:falling_block")
+		if !ok {
+			return
+		}
+
+		if p, ok := ent.(interface {
+			New(bl world.Block, pos mgl64.Vec3) world.Entity
+		}); ok {
+			w.AddEntity(p.New(b, pos.Vec3Centre()))
+		}
 	}
 }
 
@@ -232,6 +244,43 @@ func newFlammabilityInfo(encouragement, flammability int, lavaFlammable bool) Fl
 	}
 }
 
+// livingEntity ...
+type livingEntity interface {
+	// AttackImmune checks if the entity is currently immune to entity attacks. Entities typically turn
+	// immune for half a second after being attacked.
+	AttackImmune() bool
+	// Hurt hurts the entity for a given amount of damage. The source passed represents the cause of the
+	// damage, for example damage.SourceEntityAttack if the entity is attacked by another entity.
+	// If the final damage exceeds the health that the entity currently has, the entity is killed.
+	// Hurt returns the final amount of damage dealt to the Living entity and returns whether the Living entity
+	// was vulnerable to the damage at all.
+	Hurt(damage float64, src damage.Source) (n float64, vulnerable bool)
+}
+
+// flammableEntity ...
+type flammableEntity interface {
+	// OnFireDuration returns duration of fire in ticks.
+	OnFireDuration() time.Duration
+	// SetOnFire sets the entity on fire for the specified duration.
+	SetOnFire(duration time.Duration)
+	// Extinguish extinguishes the entity.
+	Extinguish()
+}
+
+// dropItem ...
+func dropItem(w *world.World, it item.Stack, pos mgl64.Vec3) {
+	ent, ok := world.EntityByName("minecraft:item")
+	if !ok {
+		return
+	}
+
+	if p, ok := ent.(interface {
+		New(it item.Stack, pos, vel mgl64.Vec3) world.Entity
+	}); ok {
+		w.AddEntity(p.New(it, pos, mgl64.Vec3{rand.Float64()*0.2 - 0.1, 0.2, rand.Float64()*0.2 - 0.1}))
+	}
+}
+
 // bass is a struct that may be embedded for blocks that create a bass sound.
 type bass struct{}
 

server/block/break_info.go

@@ -85,15 +85,20 @@ type BreakInfo struct {
 	Drops func(t item.Tool, enchantments []item.Enchantment) []item.Stack
 	// XPDrops is the range of XP a block can drop when broken.
 	XPDrops XPDropRange
+	// BlastResistance is the blast resistance of the block, which influences the block's ability to withstand an
+	// explosive blast.
+	BlastResistance float64
 }
 
-// newBreakInfo creates a BreakInfo struct with the properties passed. The XPDrops field is 0 by default.
+// newBreakInfo creates a BreakInfo struct with the properties passed. The XPDrops field is 0 by default. The blast
+// resistance is set to the block's hardness*5 by default.
 func newBreakInfo(hardness float64, harvestable func(item.Tool) bool, effective func(item.Tool) bool, drops func(item.Tool, []item.Enchantment) []item.Stack) BreakInfo {
 	return BreakInfo{
-		Hardness:    hardness,
-		Harvestable: harvestable,
-		Effective:   effective,
-		Drops:       drops,
+		Hardness:        hardness,
+		BlastResistance: hardness * 5,
+		Harvestable:     harvestable,
+		Effective:       effective,
+		Drops:           drops,
 	}
 }
 
@@ -103,6 +108,12 @@ func (b BreakInfo) withXPDropRange(min, max int) BreakInfo {
 	return b
 }
 
+// withBlastResistance sets the BlastResistance field of the BreakInfo struct to the passed value.
+func (b BreakInfo) withBlastResistance(res float64) BreakInfo {
+	b.BlastResistance = res
+	return b
+}
+
 // XPDropRange holds the min & max XP drop amounts of blocks.
 type XPDropRange [2]int
 

server/block/bricks.go

@@ -8,7 +8,7 @@ type Bricks struct {
 
 // BreakInfo ...
 func (b Bricks) BreakInfo() BreakInfo {
-	return newBreakInfo(2, pickaxeHarvestable, pickaxeEffective, oneOf(b))
+	return newBreakInfo(2, pickaxeHarvestable, pickaxeEffective, oneOf(b)).withBlastResistance(30)
 }
 
 // EncodeItem ...

server/block/cactus.go

@@ -3,7 +3,6 @@ package block
 import (
 	"github.com/df-mc/dragonfly/server/block/cube"
 	"github.com/df-mc/dragonfly/server/block/model"
-	"github.com/df-mc/dragonfly/server/entity"
 	"github.com/df-mc/dragonfly/server/entity/damage"
 	"github.com/df-mc/dragonfly/server/item"
 	"github.com/df-mc/dragonfly/server/world"
@@ -78,7 +77,7 @@ func (c Cactus) RandomTick(pos cube.Pos, w *world.World, r *rand.Rand) {
 
 // EntityInside ...
 func (c Cactus) EntityInside(_ cube.Pos, _ *world.World, e world.Entity) {
-	if l, ok := e.(entity.Living); ok && !l.AttackImmune() {
+	if l, ok := e.(livingEntity); ok && !l.AttackImmune() {
 		l.Hurt(0.5, damage.SourceBlock{Block: c})
 	}
 }

server/block/chain.go

@@ -41,7 +41,7 @@ func (c Chain) UseOnBlock(pos cube.Pos, face cube.Face, _ mgl64.Vec3, w *world.W
 
 // BreakInfo ...
 func (c Chain) BreakInfo() BreakInfo {
-	return newBreakInfo(5, pickaxeHarvestable, pickaxeEffective, oneOf(c))
+	return newBreakInfo(5, pickaxeHarvestable, pickaxeEffective, oneOf(c)).withBlastResistance(15)
 }
 
 // EncodeItem ...

server/block/coal.go

@@ -13,7 +13,7 @@ type Coal struct {
 
 // BreakInfo ...
 func (c Coal) BreakInfo() BreakInfo {
-	return newBreakInfo(5, pickaxeHarvestable, pickaxeEffective, oneOf(c))
+	return newBreakInfo(5, pickaxeHarvestable, pickaxeEffective, oneOf(c)).withBlastResistance(30)
 }
 
 // FlammabilityInfo ...

server/block/coal_ore.go

@@ -13,7 +13,11 @@ type CoalOre struct {
 
 // BreakInfo ...
 func (c CoalOre) BreakInfo() BreakInfo {
-	return newBreakInfo(c.Type.Hardness(), pickaxeHarvestable, pickaxeEffective, silkTouchOneOf(item.Coal{}, c)).withXPDropRange(0, 2)
+	i := newBreakInfo(c.Type.Hardness(), pickaxeHarvestable, pickaxeEffective, silkTouchOneOf(item.Coal{}, c)).withXPDropRange(0, 2)
+	if c.Type == DeepslateOre() {
+		i = i.withBlastResistance(9)
+	}
+	return i
 }
 
 // SmeltInfo ...

server/block/cobblestone.go

@@ -14,7 +14,7 @@ type Cobblestone struct {
 
 // BreakInfo ...
 func (c Cobblestone) BreakInfo() BreakInfo {
-	return newBreakInfo(2, pickaxeHarvestable, pickaxeEffective, oneOf(c))
+	return newBreakInfo(2, pickaxeHarvestable, pickaxeEffective, oneOf(c)).withBlastResistance(30)
 }
 
 // SmeltInfo ...

server/block/cobblestone_stairs.go

@@ -45,7 +45,7 @@ func (s CobblestoneStairs) Model() world.BlockModel {
 
 // BreakInfo ...
 func (s CobblestoneStairs) BreakInfo() BreakInfo {
-	return newBreakInfo(2, pickaxeHarvestable, pickaxeEffective, oneOf(s))
+	return newBreakInfo(2, pickaxeHarvestable, pickaxeEffective, oneOf(s)).withBlastResistance(30)
 }
 
 // EncodeItem ...

server/block/cocoa_bean.go

@@ -92,7 +92,7 @@ func (c CocoaBean) BreakInfo() BreakInfo {
 			return []item.Stack{item.NewStack(c, rand.Intn(2)+2)}
 		}
 		return []item.Stack{item.NewStack(c, 1)}
-	})
+	}).withBlastResistance(15)
 }
 
 // EncodeItem ...

server/block/copper_ore.go

@@ -18,7 +18,7 @@ type CopperOre struct {
 func (c CopperOre) BreakInfo() BreakInfo {
 	return newBreakInfo(c.Type.Hardness(), func(t item.Tool) bool {
 		return t.ToolType() == item.TypePickaxe && t.HarvestLevel() >= item.ToolTierStone.HarvestLevel
-	}, pickaxeEffective, silkTouchDrop(item.NewStack(item.RawCopper{}, rand.Intn(4)+2), item.NewStack(c, 1)))
+	}, pickaxeEffective, silkTouchDrop(item.NewStack(item.RawCopper{}, rand.Intn(4)+2), item.NewStack(c, 1))).withBlastResistance(9)
 }
 
 // SmeltInfo ...

server/block/coral_block.go

@@ -48,7 +48,7 @@ func (c CoralBlock) ScheduledTick(pos cube.Pos, w *world.World, _ *rand.Rand) {
 
 // BreakInfo ...
 func (c CoralBlock) BreakInfo() BreakInfo {
-	return newBreakInfo(7, pickaxeHarvestable, pickaxeEffective, silkTouchOneOf(CoralBlock{Type: c.Type, Dead: true}, c))
+	return newBreakInfo(7, pickaxeHarvestable, pickaxeEffective, silkTouchOneOf(CoralBlock{Type: c.Type, Dead: true}, c)).withBlastResistance(4.5)
 }
 
 // EncodeBlock ...

server/block/crop.go

@@ -2,11 +2,8 @@ package block
 
 import (
 	"github.com/df-mc/dragonfly/server/block/cube"
-	"github.com/df-mc/dragonfly/server/entity"
 	"github.com/df-mc/dragonfly/server/item"
 	"github.com/df-mc/dragonfly/server/world"
-	"github.com/go-gl/mathgl/mgl64"
-	"math/rand"
 )
 
 // Crop is an interface for all crops that are grown on farmland. A crop has a random chance to grow during random ticks.
@@ -33,9 +30,7 @@ func (c crop) NeighbourUpdateTick(pos, _ cube.Pos, w *world.World) {
 		w.SetBlock(pos, nil, nil)
 		if breakable, ok := b.(Breakable); ok {
 			for _, drop := range breakable.BreakInfo().Drops(item.ToolNone{}, []item.Enchantment{}) {
-				itemEntity := entity.NewItem(drop, pos.Vec3Centre())
-				itemEntity.SetVelocity(mgl64.Vec3{rand.Float64()*0.2 - 0.1, 0.2, rand.Float64()*0.2 - 0.1})
-				w.AddEntity(itemEntity)
+				dropItem(w, drop, pos.Vec3Centre())
 			}
 		}
 	}

server/block/diamond.go

@@ -13,7 +13,7 @@ type Diamond struct {
 func (d Diamond) BreakInfo() BreakInfo {
 	return newBreakInfo(5, func(t item.Tool) bool {
 		return t.ToolType() == item.TypePickaxe && t.HarvestLevel() >= item.ToolTierIron.HarvestLevel
-	}, pickaxeEffective, oneOf(d))
+	}, pickaxeEffective, oneOf(d)).withBlastResistance(30)
 }
 
 // PowersBeacon ...

server/block/diamond_ore.go

@@ -15,9 +15,13 @@ type DiamondOre struct {
 
 // BreakInfo ...
 func (d DiamondOre) BreakInfo() BreakInfo {
-	return newBreakInfo(d.Type.Hardness(), func(t item.Tool) bool {
+	i := newBreakInfo(d.Type.Hardness(), func(t item.Tool) bool {
 		return t.ToolType() == item.TypePickaxe && t.HarvestLevel() >= item.ToolTierIron.HarvestLevel
 	}, pickaxeEffective, silkTouchOneOf(item.Diamond{}, d)).withXPDropRange(3, 7)
+	if d.Type == DeepslateOre() {
+		i = i.withBlastResistance(9)
+	}
+	return i
 }
 
 // SmeltInfo ...

server/block/double_flower.go

@@ -2,12 +2,10 @@ package block
 
 import (
 	"github.com/df-mc/dragonfly/server/block/cube"
-	"github.com/df-mc/dragonfly/server/entity"
 	"github.com/df-mc/dragonfly/server/item"
 	"github.com/df-mc/dragonfly/server/world"
 	"github.com/df-mc/dragonfly/server/world/particle"
 	"github.com/go-gl/mathgl/mgl64"
-	"math/rand"
 )
 
 // DoubleFlower is a two block high flower consisting of an upper and lower part.
@@ -28,9 +26,7 @@ func (d DoubleFlower) FlammabilityInfo() FlammabilityInfo {
 
 // BoneMeal ...
 func (d DoubleFlower) BoneMeal(pos cube.Pos, w *world.World) bool {
-	itemEntity := entity.NewItem(item.NewStack(d, 1), pos.Vec3Centre())
-	itemEntity.SetVelocity(mgl64.Vec3{rand.Float64()*0.2 - 0.1, 0.2, rand.Float64()*0.2 - 0.1})
-	w.AddEntity(itemEntity)
+	dropItem(w, item.NewStack(d, 1), pos.Vec3Centre())
 	return true
 }
 

server/block/dripstone.go

@@ -8,7 +8,7 @@ type Dripstone struct {
 
 // BreakInfo ...
 func (d Dripstone) BreakInfo() BreakInfo {
-	return newBreakInfo(1.5, pickaxeHarvestable, pickaxeEffective, oneOf(d))
+	return newBreakInfo(1.5, pickaxeHarvestable, pickaxeEffective, oneOf(d)).withBlastResistance(5)
 }
 
 // EncodeItem ...

server/block/emerald.go

@@ -19,7 +19,7 @@ func (e Emerald) Instrument() sound.Instrument {
 func (e Emerald) BreakInfo() BreakInfo {
 	return newBreakInfo(5, func(t item.Tool) bool {
 		return t.ToolType() == item.TypePickaxe && t.HarvestLevel() >= item.ToolTierIron.HarvestLevel
-	}, pickaxeEffective, oneOf(e))
+	}, pickaxeEffective, oneOf(e)).withBlastResistance(30)
 }
 
 // PowersBeacon ...

server/block/emerald_ore.go

@@ -15,9 +15,13 @@ type EmeraldOre struct {
 
 // BreakInfo ...
 func (e EmeraldOre) BreakInfo() BreakInfo {
-	return newBreakInfo(e.Type.Hardness(), func(t item.Tool) bool {
+	i := newBreakInfo(e.Type.Hardness(), func(t item.Tool) bool {
 		return t.ToolType() == item.TypePickaxe && t.HarvestLevel() >= item.ToolTierIron.HarvestLevel
 	}, pickaxeEffective, silkTouchOneOf(item.Emerald{}, e)).withXPDropRange(3, 7)
+	if e.Type == DeepslateOre() {
+		i = i.withBlastResistance(15)
+	}
+	return i
 }
 
 // SmeltInfo ...

server/block/end_brick_stairs.go

@@ -42,7 +42,7 @@ func (s EndBrickStairs) Model() world.BlockModel {
 
 // BreakInfo ...
 func (s EndBrickStairs) BreakInfo() BreakInfo {
-	return newBreakInfo(3, pickaxeHarvestable, pickaxeEffective, oneOf(s))
+	return newBreakInfo(3, pickaxeHarvestable, pickaxeEffective, oneOf(s)).withBlastResistance(30)
 }
 
 // EncodeItem ...

server/block/end_stone.go

@@ -8,7 +8,7 @@ type EndStone struct {
 
 // BreakInfo ...
 func (e EndStone) BreakInfo() BreakInfo {
-	return newBreakInfo(3, pickaxeHarvestable, pickaxeEffective, oneOf(e))
+	return newBreakInfo(3, pickaxeHarvestable, pickaxeEffective, oneOf(e)).withBlastResistance(45)
 }
 
 // EncodeItem ...

server/block/ender_chest.go

@@ -36,7 +36,7 @@ func NewEnderChest() EnderChest {
 
 // BreakInfo ...
 func (c EnderChest) BreakInfo() BreakInfo {
-	return newBreakInfo(22.5, pickaxeHarvestable, pickaxeEffective, silkTouchDrop(item.NewStack(Obsidian{}, 8), item.NewStack(NewEnderChest(), 1)))
+	return newBreakInfo(22.5, pickaxeHarvestable, pickaxeEffective, silkTouchDrop(item.NewStack(Obsidian{}, 8), item.NewStack(NewEnderChest(), 1))).withBlastResistance(3000)
 }
 
 // LightEmissionLevel ...