Update code

Signed-off-by: yoyosource <yoyosource@nidido.de>

BauSystem_19/src/de/steamwar/bausystem/features/simulator/AxisMovementLimiter.java

@@ -103,7 +103,7 @@ public class AxisMovementLimiter {
 
         Double collision = null;
         for (Vector vector : vectors) {
-            VoxelShape voxelShape = Simulator19.getVoxelShape(vector.getBlockX(), vector.getBlockY(), vector.getBlockZ());
+            VoxelShape voxelShape = Simulator19.getVoxelShape(vector);
             for (BoundingBox boundingBox : voxelShape.getBoundingBoxes()) {
                 boundingBox = boundingBox.clone().shift(vector);
                 boolean collides = boundingBox.overlaps(movementBoundingBox);

BauSystem_19/src/de/steamwar/bausystem/features/simulator/Explosion.java

@@ -19,17 +19,36 @@
 
 package de.steamwar.bausystem.features.simulator;
 
+import org.bukkit.Material;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.block.data.Waterlogged;
 import org.bukkit.util.Vector;
 
-import java.util.HashSet;
-import java.util.List;
-import java.util.Random;
-import java.util.Set;
+import java.util.*;
 
 public class Explosion {
 
+    private static final double[] FACE_BLOCKS = new double[(16 * 16 * 2 + 14 * 16 * 2 + 14 * 14 * 2) * 3];
+
+    static {
+        int index = 0;
+        for (int x = 0; x < 16; ++x) {
+            for (int y = 0; y < 16; ++y) {
+                for (int z = 0; z < 16; ++z) {
+                    if (x == 0 || x == 15 || y == 0 || y == 15 || z == 0 || z == 15) {
+                        double dX = x / 15.0F * 2.0F - 1.0F;
+                        double dY = y / 15.0F * 2.0F - 1.0F;
+                        double dZ = z / 15.0F * 2.0F - 1.0F;
+                        double length = Math.sqrt(dX * dX + dY * dY + dZ * dZ);
+                        FACE_BLOCKS[index++] = dX / length;
+                        FACE_BLOCKS[index++] = dY / length;
+                        FACE_BLOCKS[index++] = dZ / length;
+                    }
+                }
+            }
+        }
+    }
+
     private static final Random RANDOM = new Random();
     private static final float POWER = 4.0F;
 
@@ -50,17 +69,10 @@ public class Explosion {
 
     public void calculate() {
         Set<Vector> affectedBlocks = new HashSet<>();
-        for (int i = 0; i < 16; ++i) {
-            for (int j = 0; j < 16; ++j) {
-                for (int k = 0; k < 16; ++k) {
-                    if (i == 0 || i == 15 || j == 0 || j == 15 || k == 0 || k == 15) {
-                        double d = i / 15.0F * 2.0F - 1.0F;
-                        double e = j / 15.0F * 2.0F - 1.0F;
-                        double f = k / 15.0F * 2.0F - 1.0F;
-                        double g = Math.sqrt(d * d + e * e + f * f);
-                        d /= g;
-                        e /= g;
-                        f /= g;
+        for (int i = 0; i < FACE_BLOCKS.length; i += 3) {
+            double d = FACE_BLOCKS[i + 0];
+            double e = FACE_BLOCKS[i + 1];
+            double f = FACE_BLOCKS[i + 2];
 
             float h = POWER * (0.7F + RANDOM.nextFloat() * 0.6F);
             double m = x;
@@ -92,11 +104,106 @@ public class Explosion {
                 o += f * 0.30000001192092896;
             }
         }
+        affectedBlocks.forEach(Simulator19::clearBlock);
+
+        float q = POWER * 2.0F;
+        int k = floor(x - q - 1.0D);
+        int l = floor(x + q + 1.0D);
+        int r = floor(y - q - 1.0D);
+        int s = floor(y + q + 1.0D);
+        int t = floor(z - q - 1.0D);
+        int u = floor(z + q + 1.0D);
+
+        for (TNT currentTNT : entities) {
+            if (currentTNT == tnt) continue;
+            if (!(currentTNT.getX() >= k && currentTNT.getY() >= r && currentTNT.getZ() >= t && currentTNT.getX() <= l && currentTNT.getY() <= s && currentTNT.getZ() <= u)) {
+                continue;
+            }
+
+            double x = currentTNT.getX() - this.x;
+            double y = currentTNT.getY() - this.y;
+            double z = currentTNT.getZ() - this.z;
+            double aa = Math.sqrt(x * x + y * y + z * z);
+            double w = aa / q;
+            if (w > 1.0) {
+                continue;
+            }
+            if (aa == 0.0) {
+                continue;
+            }
+            x /= aa;
+            y /= aa;
+            z /= aa;
+
+            double ab = getExposure(this.x, this.y, this.z);
+            double ac = (1.0 - w) * ab;
+            currentTNT.setVx(currentTNT.getVx() + x * ac);
+            currentTNT.setVy(currentTNT.getVy() + y * ac);
+            currentTNT.setVz(currentTNT.getVz() + z * ac);
+        }
+    }
+
+    private static int floor(double value) {
+        int i = (int) value;
+        return value < (double) i ? i - 1 : i;
+    }
+
+    private static final double SIZE = 0.98;
+    private static final double MIN_POINT = 0.01;
+    private static final double MAX_POINT = SIZE + MIN_POINT;
+    private static final double EXPOSURE_CONSTANT_1 = 1.0 / (SIZE * 2 + 1.0);
+    private static final double EXPOSURE_CONSTANT_2 = (1.0 - Math.floor(1.0 / EXPOSURE_CONSTANT_1) * EXPOSURE_CONSTANT_1) / 2.0;
+
+    private static float getExposure(double x, double y, double z) {
+        float blockMisses = 0;
+        float blockTotal = 0;
+
+        for (double k = 0.0; k <= 1.0; k += EXPOSURE_CONSTANT_1) {
+            for (double l = 0.0; l <= 1.0; l += EXPOSURE_CONSTANT_1) {
+                for (double m = 0.0; m <= 1.0; m += EXPOSURE_CONSTANT_1) {
+                    double dx = lerp(k, MIN_POINT, MAX_POINT) + EXPOSURE_CONSTANT_2;
+                    double dy = lerp(l, 0.0, SIZE);
+                    double dz = lerp(m, MIN_POINT, MAX_POINT) + EXPOSURE_CONSTANT_2;
+
+                    if (rayTrace(x, y, z, dx, dy, dz)) {
+                        blockMisses++;
+                    }
+                    blockTotal++;
                 }
             }
         }
 
-        // TODO: Add velocity change of other tnt entities
-        // System.out.println(affectedBlocks.size());
+        return blockMisses / blockTotal;
+    }
+
+    public static double lerp(double delta, double start, double end) {
+        return start + delta * (end - start);
+    }
+
+    public static boolean rayTrace(double sX, double sY, double sZ, double dX, double dY, double dZ) {
+        double x = sX;
+        double y = sY;
+        double z = sZ;
+        int oX = sX > dX ? -1 : 1;
+        int oY = sY > dY ? -1 : 1;
+        int oZ = sZ > dZ ? -1 : 1;
+        while (true) {
+            if (Simulator19.getBlockType(floor(x), floor(y), floor(z)) != Material.AIR) {
+                return true;
+            }
+
+            double cX = x - (floor(x) + oX);
+            double cY = y - (floor(y) + oY);
+            double cZ = z - (floor(z) + oZ);
+
+            double maxChange = Math.min(Math.abs(cX), Math.min(Math.abs(cY), Math.abs(cZ)));
+            x += Math.signum(cX) * maxChange;
+            y += Math.signum(cY) * maxChange;
+            z += Math.signum(cZ) * maxChange;
+
+            if (floor(x) == floor(dX) && floor(y) == floor(dY) && floor(z) == floor(dZ)) {
+                return false;
+            }
+        }
     }
 }

BauSystem_19/src/de/steamwar/bausystem/features/simulator/Simulator19.java

@@ -33,6 +33,19 @@ public class Simulator19 implements Simulator {
 
     protected static final World WORLD = Bukkit.getWorlds().get(0);
 
+    private static final BlockData AIR_BLOCK_DATA = Material.AIR.createBlockData();
+    private static final VoxelShape AIR_VOXEL_SHAPE = new VoxelShape() {
+        @Override
+        public Collection<BoundingBox> getBoundingBoxes() {
+            return Collections.emptyList();
+        }
+
+        @Override
+        public boolean overlaps(BoundingBox boundingBox) {
+            return false;
+        }
+    };
+
     private static final Map<Vector, Material> BLOCK_TYPES_MAP = new HashMap<>();
     private static final Map<Vector, BlockData> BLOCK_DATA_MAP = new HashMap<>();
     private static final Map<Vector, VoxelShape> COLLISION_DATA_MAP = new HashMap<>();
@@ -47,11 +60,9 @@ public class Simulator19 implements Simulator {
         while (!tntList.isEmpty()) {
             List<TNT> remove = new ArrayList<>();
             for (TNT tnt : tntList) {
-                if (tnt.getFuse() == 0) {
+                if (tnt.tick()) {
                     remove.add(tnt);
-                    continue;
                 }
-                tnt.tick();
             }
             tntList.removeAll(remove);
         }
@@ -72,25 +83,13 @@ public class Simulator19 implements Simulator {
         return BLOCK_DATA_MAP.computeIfAbsent(vector, v -> WORLD.getBlockAt(v.getBlockX(), v.getBlockY(), v.getBlockZ()).getBlockData());
     }
 
-    public static VoxelShape getVoxelShape(int x, int y, int z) {
-        Vector vector = new Vector(x, y, z);
+    public static VoxelShape getVoxelShape(Vector vector) {
         return COLLISION_DATA_MAP.computeIfAbsent(vector, v -> WORLD.getBlockAt(v.getBlockX(), v.getBlockY(), v.getBlockZ()).getCollisionShape());
     }
 
-    public static void clearBlock(int x, int y, int z) {
-        Vector vector = new Vector(x, y, z);
+    public static void clearBlock(Vector vector) {
         BLOCK_TYPES_MAP.put(vector, Material.AIR);
-        BLOCK_DATA_MAP.put(vector, Material.AIR.createBlockData());
-        COLLISION_DATA_MAP.put(vector, new VoxelShape() {
-            @Override
-            public Collection<BoundingBox> getBoundingBoxes() {
-                return Collections.emptyList();
-            }
-
-            @Override
-            public boolean overlaps(BoundingBox other) {
-                return false;
-            }
-        });
+        BLOCK_DATA_MAP.put(vector, AIR_BLOCK_DATA);
+        COLLISION_DATA_MAP.put(vector, AIR_VOXEL_SHAPE);
     }
 }

BauSystem_19/src/de/steamwar/bausystem/features/simulator/TNT.java

@@ -31,6 +31,7 @@ import org.bukkit.block.data.type.*;
 import org.bukkit.craftbukkit.v1_19_R2.CraftWorld;
 import org.bukkit.util.Vector;
 
+import java.util.ArrayList;
 import java.util.Random;
 
 @Getter
@@ -81,7 +82,7 @@ public class TNT {
 
         this.fuse--;
         if (this.fuse <= 0) {
-            Explosion explosion = new Explosion(this, x, y + 0.98 * 0.0625, z);
+            Explosion explosion = new Explosion(this, x, y + 0.98 * 0.0625, z, new ArrayList<>());
             explosion.calculate();
             return true;
         }