尝试添加弹道计算

src/main/java/net/mcreator/superbwarfare/client/gui/RangeHelper.java

@@ -1,7 +1,16 @@
 package net.mcreator.superbwarfare.client.gui;
 
+import net.minecraft.core.BlockPos;
+
 public class RangeHelper {
-    // 发射角度（以度为单位），需要根据实际情况修改
+
+    public static final int MAX_RANGE = 512;
+
+    /**
+     * 计算迫击炮理论水平射程
+     *
+     * @param thetaDegrees 发射角度（以度为单位），需要根据实际情况修改
+     */
     public static double getRange(double thetaDegrees) {
         double initialVelocity = 8.0; // 初始速度 8 m/s
         double thetaRadians = Math.toRadians(thetaDegrees); // 将角度转换为弧度
@@ -38,4 +47,103 @@ public class RangeHelper {
         // 返回最终水平距离
         return x;
     }
+
+    public static double calculateRangeWithDeltaY(double initialVelocity, double theta, double gravity, double velocityDecay, double deltaY) {
+        double vx = initialVelocity * Math.cos(theta); // 水平速度
+        double vy = initialVelocity * Math.sin(theta); // 垂直速度
+
+        double range = 0.0; // 水平距离
+        double y = 1.0; // 垂直位置
+
+        double commonRange = calculateRange(initialVelocity, theta, gravity, velocityDecay);
+
+        // 当炮弹还未触地时，继续计算飞行轨迹
+        while (range < commonRange / 2 || (range >= commonRange / 2 && y >= deltaY)) {
+            // 更新位置
+            range += vx;
+            y += vy;
+
+            // 更新速度
+            vx *= velocityDecay;
+            vy = vy * velocityDecay - gravity;
+
+            if (range >= commonRange / 2 && y < deltaY) {
+                break;
+            }
+        }
+
+        // 返回最终水平距离
+        return range;
+    }
+
+    public static boolean canReachTarget(double initialVelocity, double gravity, double velocityDecay, BlockPos startPos, BlockPos targetPos, double[] angles) {
+        if (startPos.equals(targetPos)) {
+            return false;
+        }
+
+        int startX = startPos.getX();
+        int startY = startPos.getY();
+        int startZ = startPos.getZ();
+
+        int targetX = targetPos.getX();
+        int targetY = targetPos.getY();
+        int targetZ = targetPos.getZ();
+
+        double distanceXZ = Math.sqrt(Math.pow(targetX - startX, 2) + Math.pow(targetZ - startZ, 2));
+        if (distanceXZ > MAX_RANGE) {
+            return false;
+        }
+
+        double theta = calculateLaunchAngle(initialVelocity, gravity, velocityDecay, distanceXZ, targetY - startY);
+
+        if (theta < 20 || theta > 90) {
+            return false;
+        }
+
+        angles[0] = Math.atan2(targetZ, targetX); // 水平角度
+        angles[1] = theta; // 炮口抬升角度
+        return true;
+    }
+
+    public static double calculateLaunchAngle(double initialVelocity, double gravity, double velocityDecay, double distanceXZ, double targetY) {
+        double left = 20;  // 最小角度
+        double right = 30; // 最大角度
+        double tolerance = 0.5; // 允许的误差范围
+
+        // 在 20 到 30 之间搜索
+        while (right - left > tolerance) {
+            double mid = (left + right) / 2;
+            double radian = Math.toRadians(mid);
+            double range = calculateRangeWithDeltaY(initialVelocity, radian, gravity, velocityDecay, targetY);
+
+            if (Math.abs(range - distanceXZ) < tolerance * 4) {
+                return mid;
+            } else if (range < distanceXZ) {
+                left = mid;
+            } else {
+                right = mid;
+            }
+        }
+
+        // 如果在 20 到 30 之间没有找到合适的角度，则在 30 到 90 之间搜索
+        left = 30;
+        right = 90;
+
+        while (right - left > tolerance) {
+            double mid = (left + right) / 2;
+            double radian = Math.toRadians(mid);
+            double range = calculateRangeWithDeltaY(initialVelocity, radian, gravity, velocityDecay, targetY);
+
+            if (Math.abs(range - distanceXZ) < tolerance * 4) {
+                return mid;
+            } else if (range < distanceXZ) {
+                right = mid;
+            } else {
+                left = mid;
+            }
+        }
+
+        // 如果仍然没有找到合适的角度，则返回 -1
+        return -1;
+    }
 }

src/main/java/net/mcreator/superbwarfare/init/ModItems.java

@@ -110,6 +110,8 @@ public class ModItems {
      */
     public static final DeferredRegister<Item> ITEMS = DeferredRegister.create(ForgeRegistries.ITEMS, ModUtils.MODID);
 
+    public static final RegistryObject<Item> TEST_ITEM = ITEMS.register("test_item", TestItem::new);
+
     public static final RegistryObject<Item> SENPAI_SPAWN_EGG = ITEMS.register("senpai_spawn_egg", () -> new ForgeSpawnEggItem(ModEntities.SENPAI, -11584987, -14014413, new Item.Properties()));
     public static final RegistryObject<Item> ANCIENT_CPU = ITEMS.register("ancient_cpu", () -> new Item(new Item.Properties().rarity(Rarity.RARE)));
     public static final RegistryObject<Item> PROPELLER = ITEMS.register("propeller", () -> new Item(new Item.Properties()));

src/main/java/net/mcreator/superbwarfare/item/TestItem.java

@@ -0,0 +1,60 @@
+package net.mcreator.superbwarfare.item;
+
+import net.mcreator.superbwarfare.client.gui.RangeHelper;
+import net.minecraft.core.BlockPos;
+import net.minecraft.network.chat.Component;
+import net.minecraft.world.InteractionResult;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.TooltipFlag;
+import net.minecraft.world.item.context.UseOnContext;
+import net.minecraft.world.level.Level;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+
+public class TestItem extends Item {
+
+    public TestItem() {
+        super(new Properties().stacksTo(1));
+    }
+
+    @Override
+    public InteractionResult useOn(UseOnContext pContext) {
+        ItemStack stack = pContext.getItemInHand();
+        BlockPos pos = pContext.getClickedPos();
+        pos = pos.relative(pContext.getClickedFace());
+        Player player = pContext.getPlayer();
+        if (player == null) return InteractionResult.PASS;
+
+        if (player.isShiftKeyDown()) {
+            stack.getOrCreateTag().putInt("StartX", pos.getX());
+            stack.getOrCreateTag().putInt("StartY", pos.getY());
+            stack.getOrCreateTag().putInt("StartZ", pos.getZ());
+            return InteractionResult.SUCCESS;
+        } else {
+            stack.getOrCreateTag().putInt("TargetX", pos.getX());
+            stack.getOrCreateTag().putInt("TargetY", pos.getY());
+            stack.getOrCreateTag().putInt("TargetZ", pos.getZ());
+        }
+
+        return InteractionResult.SUCCESS;
+    }
+
+    @Override
+    public void appendHoverText(ItemStack pStack, @Nullable Level pLevel, List<Component> pTooltipComponents, TooltipFlag pIsAdvanced) {
+        pTooltipComponents.add(Component.literal("Start Pos: [" + pStack.getOrCreateTag().getInt("StartX") + ","
+                + pStack.getOrCreateTag().getInt("StartY") + "," + pStack.getOrCreateTag().getInt("StartZ") + "]"));
+        pTooltipComponents.add(Component.literal("Target Pos: [" + pStack.getOrCreateTag().getInt("TargetX") + ","
+                + pStack.getOrCreateTag().getInt("TargetY") + "," + pStack.getOrCreateTag().getInt("TargetZ") + "]"));
+
+        double[] angles = new double[2];
+        boolean flag = RangeHelper.canReachTarget(8.0, 0.05, 0.99,
+                new BlockPos(pStack.getOrCreateTag().getInt("StartX"), pStack.getOrCreateTag().getInt("StartY"), pStack.getOrCreateTag().getInt("StartZ")),
+                new BlockPos(pStack.getOrCreateTag().getInt("TargetX"), pStack.getOrCreateTag().getInt("TargetY"), pStack.getOrCreateTag().getInt("TargetZ")),
+                angles);
+
+        pTooltipComponents.add(Component.literal(flag + " Angles: " + angles[0] + "," + angles[1]));
+    }
+}