From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Sat, 29 Jun 2019 02:32:40 -0500
Subject: [PATCH] Minecart settings and WASD controls


diff --git a/net/minecraft/server/level/ServerPlayer.java b/net/minecraft/server/level/ServerPlayer.java
index 6c5dab657ae7a7f5fd6fb73a86b3e8e4803dae50..998ce3a34e48e56cd907fc61cc3715518cbfae28 100644
--- a/net/minecraft/server/level/ServerPlayer.java
+++ b/net/minecraft/server/level/ServerPlayer.java
@@ -1153,6 +1153,11 @@ public class ServerPlayer extends Player {
         } else {
             // Purpur start - Add boat fall damage config
             if (damageSource.is(net.minecraft.tags.DamageTypeTags.IS_FALL)) {
+                // Purpur start - Minecart settings and WASD controls
+                if (getRootVehicle() instanceof net.minecraft.world.entity.vehicle.AbstractMinecart && level().purpurConfig.minecartControllable && !level().purpurConfig.minecartControllableFallDamage) {
+                    return false;
+                }
+                // Purpur end - Minecart settings and WASD controls
                 if (getRootVehicle() instanceof net.minecraft.world.entity.vehicle.Boat && !level().purpurConfig.boatsDoFallDamage) {
                     return false;
                 }
diff --git a/net/minecraft/world/entity/vehicle/AbstractMinecart.java b/net/minecraft/world/entity/vehicle/AbstractMinecart.java
index 99617c08cbd989092ba357d8df928786fd04c89a..9d88b260528c3cea2c5fe8e2760094b0a8a35667 100644
--- a/net/minecraft/world/entity/vehicle/AbstractMinecart.java
+++ b/net/minecraft/world/entity/vehicle/AbstractMinecart.java
@@ -103,6 +103,10 @@ public abstract class AbstractMinecart extends VehicleEntity {
     private double flyingY = 0.95;
     private double flyingZ = 0.95;
     public @Nullable Double maxSpeed;
+    // Purpur start - Minecart settings and WASD controls
+    public double storedMaxSpeed;
+    public boolean isNewBehavior;
+    // Purpur end - Minecart settings and WASD controls
     // CraftBukkit end
 
@@ -111,8 +115,13 @@ public abstract class AbstractMinecart extends VehicleEntity {
         this.blocksBuilding = true;
         if (useExperimentalMovement(level)) {
             this.behavior = new NewMinecartBehavior(this);
+            this.isNewBehavior = true; // Purpur - Minecart settings and WASD controls
         } else {
             this.behavior = new OldMinecartBehavior(this);
+            // Purpur start - Minecart settings and WASD controls
+            this.isNewBehavior = false;
+            maxSpeed = storedMaxSpeed = level.purpurConfig.minecartMaxSpeed;
+            // Purpur end - Minecart settings and WASD controls
         }
     }
 
@@ -277,6 +286,14 @@ public abstract class AbstractMinecart extends VehicleEntity {
 
     @Override
     public void tick() {
+        // Purpur start - Minecart settings and WASD controls
+        if (!this.isNewBehavior) {
+            if (storedMaxSpeed != level().purpurConfig.minecartMaxSpeed) {
+                maxSpeed = storedMaxSpeed = level().purpurConfig.minecartMaxSpeed;
+            }
+        }
+        // Purpur end - Minecart settings and WASD controls
+
         // CraftBukkit start
         double prevX = this.getX();
         double prevY = this.getY();
@@ -384,15 +401,61 @@ public abstract class AbstractMinecart extends VehicleEntity {
         this.behavior.moveAlongTrack(level);
     }
 
+    // Purpur start - Minecart settings and WASD controls
+    private Double lastSpeed;
+
+    public double getControllableSpeed() {
+        BlockState blockState = level().getBlockState(this.blockPosition());
+        if (!blockState.isSolid()) {
+            blockState = level().getBlockState(this.blockPosition().relative(Direction.DOWN));
+        }
+        Double speed = level().purpurConfig.minecartControllableBlockSpeeds.get(blockState.getBlock());
+        if (!blockState.isSolid()) {
+            speed = lastSpeed;
+        }
+        if (speed == null) {
+            speed = level().purpurConfig.minecartControllableBaseSpeed;
+        }
+        return lastSpeed = speed;
+    }
+    // Purpur end - Minecart settings and WASD controls
+
     protected void comeOffTrack(ServerLevel level) {
         double maxSpeed = this.getMaxSpeed(level);
         Vec3 deltaMovement = this.getDeltaMovement();
         this.setDeltaMovement(Mth.clamp(deltaMovement.x, -maxSpeed, maxSpeed), deltaMovement.y, Mth.clamp(deltaMovement.z, -maxSpeed, maxSpeed));
+
+        // Purpur start - Minecart settings and WASD controls
+        if (level().purpurConfig.minecartControllable && !isInWater() && !isInLava() && !passengers.isEmpty()) {
+            Entity passenger = passengers.get(0);
+            if (passenger instanceof net.minecraft.server.level.ServerPlayer player) {
+                net.minecraft.world.entity.player.Input lastClientInput = player.getLastClientInput();
+                float forward = (lastClientInput.forward() == lastClientInput.backward() ? 0.0F : lastClientInput.forward() ? 1.0F : -1.0F);
+                if (lastClientInput.jump() && this.onGround) {
+                    setDeltaMovement(new Vec3(getDeltaMovement().x, level().purpurConfig.minecartControllableHopBoost, getDeltaMovement().z));
+                }
+                if (forward != 0.0F) {
+                    org.bukkit.util.Vector velocity = player.getBukkitEntity().getEyeLocation().getDirection().normalize().multiply(getControllableSpeed());
+                    if (forward < 0.0) {
+                        velocity.multiply(-0.5);
+                    }
+                    setDeltaMovement(new Vec3(velocity.getX(), getDeltaMovement().y, velocity.getZ()));
+                }
+                this.setYRot(passenger.getYRot() - 90);
+                maxUpStep = level().purpurConfig.minecartControllableStepHeight;
+            } else {
+                maxUpStep = 0.0F;
+            }
+        } else {
+            maxUpStep = 0.0F;
+        }
+        // Purpur end - Minecart settings and WASD controls
         if (this.onGround()) {
             // CraftBukkit start - replace magic numbers with our variables
             this.setDeltaMovement(new Vec3(this.getDeltaMovement().x * this.derailedX, this.getDeltaMovement().y * this.derailedY, this.getDeltaMovement().z * this.derailedZ));
             // CraftBukkit end
         }
+        else if (level().purpurConfig.minecartControllable) setDeltaMovement(new Vec3(getDeltaMovement().x * derailedX, getDeltaMovement().y, getDeltaMovement().z * derailedZ)); // Purpur - Minecart settings and WASD controls
 
         this.move(MoverType.SELF, this.getDeltaMovement());
         if (!this.onGround()) {
diff --git a/net/minecraft/world/item/MinecartItem.java b/net/minecraft/world/item/MinecartItem.java
index 620069daba04d48b57fc933328eda77f6ca9333e..0403b9b01994269d394820e8c8710ba1b9808bf0 100644
--- a/net/minecraft/world/item/MinecartItem.java
+++ b/net/minecraft/world/item/MinecartItem.java
@@ -30,8 +30,9 @@ public class MinecartItem extends Item {
         BlockPos clickedPos = context.getClickedPos();
         BlockState blockState = level.getBlockState(clickedPos);
         if (!blockState.is(BlockTags.RAILS)) {
-            return InteractionResult.FAIL;
-        } else {
+            if (!level.purpurConfig.minecartPlaceAnywhere) return InteractionResult.FAIL; // Purpur - Minecart settings and WASD controls
+            if (blockState.isSolid()) clickedPos = clickedPos.relative(context.getClickedFace());
+        } // else { // Purpur - Minecart settings and WASD controls
             ItemStack itemInHand = context.getItemInHand();
             RailShape railShape = blockState.getBlock() instanceof BaseRailBlock
                 ? blockState.getValue(((BaseRailBlock)blockState.getBlock()).getShapeProperty())
@@ -72,6 +73,6 @@ public class MinecartItem extends Item {
                 itemInHand.shrink(1);
                 return InteractionResult.SUCCESS;
             }
-        }
+        // } // Purpur - Minecart settings and WASD controls
     }
 }