From 20ba4312d87266b03a98ce725ef691a4211c488f Mon Sep 17 00:00:00 2001 From: Atsuishio <842960157@qq.com> Date: Tue, 15 Jul 2025 11:20:23 +0800 Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96=E5=BC=B9=E9=81=93=E8=AE=A1?= =?UTF-8?q?=E7=AE=97=E6=96=B9=E6=B3=95?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../entity/projectile/MediumRocketEntity.java | 3 +- .../entity/vehicle/A10Entity.java | 2 +- .../tools/ProjectileCalculator.java | 233 +++++++++--------- 3 files changed, 118 insertions(+), 120 deletions(-) diff --git a/src/main/java/com/atsuishio/superbwarfare/entity/projectile/MediumRocketEntity.java b/src/main/java/com/atsuishio/superbwarfare/entity/projectile/MediumRocketEntity.java index e23c88c8b..528e717d2 100644 --- a/src/main/java/com/atsuishio/superbwarfare/entity/projectile/MediumRocketEntity.java +++ b/src/main/java/com/atsuishio/superbwarfare/entity/projectile/MediumRocketEntity.java @@ -258,8 +258,7 @@ public class MediumRocketEntity extends FastThrowableProjectile implements GeoEn if (type == Type.CM && getDeltaMovement().y < 0.1 && !active) { if (position().y < level().getMinBuildHeight() || position().y > level().getMaxBuildHeight()) return; - BlockPos hitBlock = ProjectileCalculator.calculateImpactPosition(level(), position(), getDeltaMovement(), -0.05); - Vec3 finalPos = hitBlock.getCenter(); + Vec3 finalPos = ProjectileCalculator.calculatePreciseImpactPoint(level(), position(), getDeltaMovement(), -0.05); double vh = getDeltaMovement().horizontalDistance(); double dh = position().vectorTo(finalPos).horizontalDistance(); int t = (int) (dh / vh); diff --git a/src/main/java/com/atsuishio/superbwarfare/entity/vehicle/A10Entity.java b/src/main/java/com/atsuishio/superbwarfare/entity/vehicle/A10Entity.java index 303c813c1..459e351c8 100644 --- a/src/main/java/com/atsuishio/superbwarfare/entity/vehicle/A10Entity.java +++ b/src/main/java/com/atsuishio/superbwarfare/entity/vehicle/A10Entity.java @@ -288,7 +288,7 @@ public class A10Entity extends ContainerMobileVehicleEntity implements GeoEntity // 计算航弹落点 if (level().isClientSide) { - bombLandingPos = ProjectileCalculator.calculateImpactPosition(level(), shootPos(1), shootVec(1), -0.06).getCenter(); + bombLandingPos = ProjectileCalculator.calculatePreciseImpactPoint(level(), shootPos(1), shootVec(1), -0.06); } this.refreshDimensions(); diff --git a/src/main/java/com/atsuishio/superbwarfare/tools/ProjectileCalculator.java b/src/main/java/com/atsuishio/superbwarfare/tools/ProjectileCalculator.java index 35ec8fba1..2ed36d3f8 100644 --- a/src/main/java/com/atsuishio/superbwarfare/tools/ProjectileCalculator.java +++ b/src/main/java/com/atsuishio/superbwarfare/tools/ProjectileCalculator.java @@ -1,146 +1,145 @@ package com.atsuishio.superbwarfare.tools; -import net.minecraft.core.BlockPos; +import net.minecraft.core.particles.ParticleTypes; +import net.minecraft.world.level.ClipContext; import net.minecraft.world.level.Level; -import net.minecraft.world.level.block.state.BlockState; +import net.minecraft.world.phys.BlockHitResult; +import net.minecraft.world.phys.HitResult; import net.minecraft.world.phys.Vec3; +import java.util.Optional; + public class ProjectileCalculator { - private static final double TIME_STEP = 0.1; // 时间步长（刻） - private static final int MAX_ITERATIONS = 1000; // 最大迭代次数 + private static final double TIME_STEP = 0.05; // 时间步长（刻） + private static final int MAX_ITERATIONS = 2000; // 最大迭代次数 + private static final double COLLISION_THRESHOLD = 0.001; // 碰撞检测阈值 /** - * 计算炮弹落地位置 + * 计算炮弹精确落点位置（Vec3） * - * @param world 世界对象 - * @param startPos 发射点位置 - * @param launchVector 发射向量 - * @return 预测的落点方块位置 + * @param level 世界对象 + * @param startPos 发射点位置（Vec3） + * @param launchVector 发射向量（Vec3） + * @return 精确的落点位置（Vec3），如果没有碰撞则返回最后位置 */ - public static BlockPos calculateImpactPosition(Level world, Vec3 startPos, Vec3 launchVector, double gravity) { - // 当前炮弹位置和速度 + public static Vec3 calculatePreciseImpactPoint(Level level, Vec3 startPos, Vec3 launchVector, double gravity) { Vec3 currentPos = startPos; Vec3 currentVelocity = launchVector; - - // 记录上一刻位置 - Vec3 prevPos = startPos; + Vec3 previousPos = startPos; for (int i = 0; i < MAX_ITERATIONS; i++) { - // 更新位置 + // 计算下一个位置 Vec3 nextPos = currentPos.add( currentVelocity.x * TIME_STEP, currentVelocity.y * TIME_STEP, currentVelocity.z * TIME_STEP ); - // 更新速度（重力影响） + // 应用重力 currentVelocity = currentVelocity.add(0, gravity * TIME_STEP, 0); - // 检查是否碰撞方块 - BlockPos collisionPos = checkCollision(world, prevPos, nextPos); - if (collisionPos != null) { - return collisionPos; + // 检查碰撞 + Optional collisionPoint = checkCollision(level, previousPos, nextPos); + + if (collisionPoint.isPresent()) { + // 精确计算碰撞点 + return refineCollisionPoint(level, previousPos, collisionPoint.get()); } - // 更新位置进行下一步 - prevPos = currentPos; + // 边界检查 + if (nextPos.y < level.getMinBuildHeight()) { + return new Vec3(nextPos.x, level.getMinBuildHeight(), nextPos.z); + } + + // 更新位置 + previousPos = currentPos; + currentPos = nextPos; + } + + // 超过最大迭代次数，返回最后位置 + return currentPos; + } + + /** + * 检查两点之间是否有碰撞 + */ + private static Optional checkCollision(Level level, Vec3 start, Vec3 end) { + // 使用Minecraft内置的光线追踪进行碰撞检测 + BlockHitResult hitResult = level.clip(new ClipContext( + start, + end, + ClipContext.Block.COLLIDER, // 只检测碰撞方块 + ClipContext.Fluid.NONE, // 忽略流体 + null // 无实体 + )); + + // 如果检测到碰撞，返回碰撞点 + if (hitResult.getType() == HitResult.Type.BLOCK) { + return Optional.of(hitResult.getLocation()); + } + + // 没有检测到碰撞 + return Optional.empty(); + } + + /** + * 精确计算碰撞点（使用二分法提高精度） + */ + private static Vec3 refineCollisionPoint(Level level, Vec3 safePoint, Vec3 collisionPoint) { + Vec3 low = safePoint; + Vec3 high = collisionPoint; + Vec3 bestPoint = collisionPoint; + + // 二分法迭代提高精度 + for (int i = 0; i < 10; i++) { + Vec3 mid = low.add(high.subtract(low).scale(0.5)); + + // 检查从安全点到中点是否有碰撞 + Optional collision = checkCollision(level, low, mid); + + if (collision.isPresent()) { + // 有碰撞，将高点移动到中点 + high = mid; + bestPoint = collision.get(); + } else { + // 无碰撞，将低点移动到中点 + low = mid; + } + } + + return bestPoint; + } + + /** + * 可视化炮弹轨迹（用于调试） + */ + public static void visualizeTrajectory(Level level, Vec3 startPos, Vec3 launchVector, double gravity) { + if (!level.isClientSide()) return; + + Vec3 currentPos = startPos; + Vec3 currentVelocity = launchVector; + + for (int i = 0; i < 100; i++) { + Vec3 nextPos = currentPos.add( + currentVelocity.x * 0.5, + currentVelocity.y * 0.5, + currentVelocity.z * 0.5 + ); + + // 创建粒子效果显示轨迹 + for (double d = 0; d < 1.0; d += 0.1) { + Vec3 point = currentPos.add(nextPos.subtract(currentPos).scale(d)); + level.addParticle(ParticleTypes.ELECTRIC_SPARK, + point.x, point.y, point.z, + 0, 0, 0); + } + + // 应用重力 + currentVelocity = currentVelocity.add(0, gravity * 0.5, 0); currentPos = nextPos; - // 安全检查：防止飞出世界边界 - if (currentPos.y < world.getMinBuildHeight() || currentPos.y > world.getMaxBuildHeight()) { - return new BlockPos( - (int)Math.floor(currentPos.x), - (int)Math.floor(currentPos.y), - (int)Math.floor(currentPos.z) - ); - } + // 提前终止检查 + if (currentPos.y < level.getMinBuildHeight()) break; } - - // 超过最大迭代次数，返回当前位置 - return new BlockPos( - (int)Math.floor(currentPos.x), - (int)Math.floor(currentPos.y), - (int)Math.floor(currentPos.z) - ); - } - - /** - * 检查两点之间是否有碰撞方块 - */ - private static BlockPos checkCollision(Level world, Vec3 start, Vec3 end) { - // 使用距离和方向向量 - double dx = end.x - start.x; - double dy = end.y - start.y; - double dz = end.z - start.z; - double distance = Math.sqrt(dx*dx + dy*dy + dz*dz); - - if (distance == 0) return null; - - // 方向单位向量 - double dirX = dx / distance; - double dirY = dy / distance; - double dirZ = dz / distance; - - // 步进检查 - double stepSize = 0.1; // 检查步长 - for (double t = 0; t < distance; t += stepSize) { - double x = start.x + dirX * t; - double y = start.y + dirY * t; - double z = start.z + dirZ * t; - - BlockPos pos = new BlockPos((int)Math.floor(x), (int)Math.floor(y), (int)Math.floor(z)); - BlockState state = world.getBlockState(pos); - - // 检查是否碰到固体方块 - if (!state.isAir()) { - return pos; - } - - // 检查是否碰到下方方块（炮弹落地） - BlockPos belowPos = pos.below(); - BlockState belowState = world.getBlockState(belowPos); - - if (y - Math.floor(y) < 0.1 && !belowState.isAir()) { - return belowPos; - } - } - - return null; - } - - - /** - * 快速预测落点（不考虑地形，仅数学计算） - * 用于平坦地形或初始估算 - */ - public static Vec3 estimateLandingPosition(Vec3 startPos, Vec3 launchVector, double gravity) { - double vx = launchVector.x; - double vy = launchVector.y; - double vz = launchVector.z; - - // 计算飞行时间 (解二次方程: y = y0 + vy*t + 0.5*g*t² = 0) - double a = 0.5 * gravity; - double b = vy; - double c = startPos.y; // 假设地面高度为0 - - // 计算判别式 - double discriminant = b*b - 4*a*c; - - if (discriminant < 0) { - // 无实数解，炮弹不会落地 - return null; - } - - // 取正数解 - double t = (-b + Math.sqrt(discriminant)) / (2*a); - if (t < 0) { - t = (-b - Math.sqrt(discriminant)) / (2*a); - } - - // 计算落点 - double x = startPos.x + vx * t; - double z = startPos.z + vz * t; - - return new Vec3(x, 0, z); } }