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using System;
using System.Collections.Generic;
using UnityEngine;
public struct ColliderDescriptor
{
public ColliderInfo colliderInfo;
public UnitCollider unitCollider;
}
[Serializable]
public struct Box
{
[SerializeField] public Vector3 center;
[SerializeField] public Vector3 size;
}
public struct CollisionInfo
{
public ColliderDescriptor collider; // 主动
public ColliderDescriptor collidee; // 从动
public Box intersection;
public bool isCollision;
}
public class CollisionSystem : SingletonMB<CollisionSystem>
{
public delegate void StageHandle();
public StageHandle onSolveHit;
[SerializeField]
private int m_UnitColliderCount;
ColliderRegistry registry { get { return ColliderRegistry.Instance; } }
private void Start()
{
}
void Update()
{
m_UnitColliderCount = registry.colliders != null ? registry.colliders.Count : 0;
SolveHit();
SolveProjectile();
}
// hitbox <-> hurtbox
void SolveHit()
{
// collect all hit box
List<ColliderDescriptor> hitboxes = ListPool<ColliderDescriptor>.Get();
foreach (var collider in registry.colliders)
{
ColliderInfo[] boxes = collider.GetCurrentBoxesInfoByType(ColliderBox.EColliderType.HitBox);
if (boxes == null || boxes.Length == 0)
continue;
for(int i = 0; i < boxes.Length; ++i)
{
ColliderDescriptor descriptor = new ColliderDescriptor();
descriptor.colliderInfo = boxes[i];
descriptor.unitCollider = collider;
hitboxes.Add(descriptor);
}
}
// collect all hurt box
List<ColliderDescriptor> hurtboxes = ListPool<ColliderDescriptor>.Get();
foreach (var collider in registry.colliders)
{
ColliderInfo[] boxes = collider.GetCurrentBoxesInfoByType(ColliderBox.EColliderType.HurtBox);
if (boxes == null || boxes.Length == 0)
continue;
for (int i = 0; i < boxes.Length; ++i)
{
ColliderDescriptor descriptor = new ColliderDescriptor();
descriptor.colliderInfo = boxes[i];
descriptor.unitCollider = collider;
hurtboxes.Add(descriptor);
}
}
// solve
for(int i = 0; i < hitboxes.Count; ++ i)
{
ColliderDescriptor hitbox = hitboxes[i];
for (int j = 0; j < hurtboxes.Count; ++j)
{
ColliderDescriptor hurtbox = hurtboxes[j];
if (hitbox.unitCollider == hurtbox.unitCollider)
continue;
if (hitbox.unitCollider.owner.type == hurtbox.unitCollider.owner.type)
continue;
CollisionInfo collision = ColliderUtility.GetCollision(hitbox, hurtbox);
if (!collision.isCollision)
continue;
if (!hitbox.unitCollider.CanCollide(hitbox.colliderInfo.colliderHash, hurtbox.unitCollider.owner.GetHashCode()))
continue;
hitbox.unitCollider.RecordCollision(hitbox.colliderInfo.colliderHash, hurtbox.unitCollider.owner.GetHashCode());
hitbox.unitCollider.owner.OnHit(collision);
hurtbox.unitCollider.owner.OnGetHit(collision);
}
}
ListPool<ColliderDescriptor>.Release(hitboxes);
ListPool<ColliderDescriptor>.Release(hurtboxes);
}
void SolveProjectile()
{
// collect all hurt box
List<ColliderDescriptor> hurtboxes = ListPool<ColliderDescriptor>.Get();
foreach (var collider in registry.colliders)
{
ColliderInfo[] boxes = collider.GetCurrentBoxesInfoByType(ColliderBox.EColliderType.HurtBox);
if (boxes == null || boxes.Length == 0)
continue;
for (int i = 0; i < boxes.Length; ++i)
{
ColliderDescriptor descriptor = new ColliderDescriptor();
descriptor.colliderInfo = boxes[i];
descriptor.unitCollider = collider;
hurtboxes.Add(descriptor);
}
}
foreach (var projectile in registry.projectiles)
{
if (projectile == null)
continue;
for(int i = 0; i < hurtboxes.Count; ++i)
{
ColliderDescriptor hurtCollider = hurtboxes[i];
if (hurtCollider.unitCollider == null)
continue;
if (projectile.owner == null || hurtCollider.unitCollider.owner == null || projectile.owner.type == hurtCollider.unitCollider.owner.type)
continue;
Box hurtbox = ColliderUtility.GetColliderInWorldSpace(hurtCollider);
foreach (var itor in projectile.GetCollidersInWorldSpace())
{
Box box = (Box)itor;
Box intersection = ColliderUtility.GetIntersection(box, hurtbox);
if (intersection.size.magnitude == 0)
continue;
if (!projectile.CanHit(hurtCollider.unitCollider.owner.GetHashCode()))
continue;
projectile.RecordTarget(hurtCollider.unitCollider.owner.GetHashCode());
CollisionInfo collision = new CollisionInfo();
collision.isCollision = true;
collision.intersection = intersection;
collision.collidee = hurtCollider;
hurtCollider.unitCollider.owner.OnGetShot(collision);
projectile.OnShot(collision);
goto next;
}
}
next:;
}
}
// throwbox <-> hurtbox
void SolveThrow()
{
}
// defendbox <-> hurtbox
void SolveDefend()
{
}
// blockbox <-> hitbox
void SolveBlock()
{
}
private void OnDrawGizmos()
{
}
}
public static class ColliderUtility
{
public static CollisionInfo GetCollision(ColliderDescriptor collider, ColliderDescriptor collidee)
{
CollisionInfo collision = new CollisionInfo();
collision.collider = collider;
collision.collidee = collidee;
Box colliderBox = GetColliderInWorldSpace(collider);
Box collideeBox = GetColliderInWorldSpace(collidee);
Box intersection = GetIntersection(colliderBox, collideeBox);
collision.intersection = intersection;
collision.isCollision = intersection.size.magnitude != 0;
return collision;
}
public static Box GetColliderInWorldSpace(ColliderDescriptor collider)
{
Box box = new Box();
Vector3 fac = new Vector3(1, 1, collider.unitCollider.owner.transform.forward.normalized == Vector3.forward ? 1 : -1);
Vector3 unitPos = collider.unitCollider.owner.transform.position;
Vector3 pos = Vector3.zero; // gizmo位置
Vector3 localPos = collider.unitCollider.owner.transform.rotation * collider.colliderInfo.position;
Vector3 localSize = collider.colliderInfo.size;
var pivot = collider.colliderInfo.pivot;
switch (pivot)
{
case ColliderBox.Pivot.MiddleBottom:
localPos.y += localSize.y / 2;
break;
}
pos = unitPos + Vector3.Scale(localPos, fac);
box.center = pos;
box.size = localSize;
return box;
}
public static Box GetIntersection(Box b1, Box b2)
{
bool isIntersection = true;
float l1 = b1.center.x - b1.size.x / 2;
float r1 = b1.center.x + b1.size.x / 2;
float l2 = b2.center.x - b2.size.x / 2;
float r2 = b2.center.x + b2.size.x / 2;
isIntersection &= r1 >= l2 && l1 <= r2;
float o1 = b1.center.y - b1.size.y / 2;
float t1 = b1.center.y + b1.size.y / 2;
float o2 = b2.center.y - b2.size.y / 2;
float t2 = b2.center.y + b2.size.y / 2;
isIntersection &= t1 >= o2 && o1 <= t2;
float c1 = b1.center.z - b1.size.z / 2;
float f1 = b1.center.z + b1.size.z / 2;
float c2 = b2.center.z - b2.size.z / 2;
float f2 = b2.center.z + b2.size.z / 2;
isIntersection &= f1 >= c2 && c1 <= f2;
if(!isIntersection)
{
return new Box();
}
Box box = new Box();
float l = Mathf.Max(l1, l2);
float r = Mathf.Min(r1, r2);
float b = Mathf.Max(o1, o2);
float t = Mathf.Min(t1, t2);
float c = Mathf.Max(c1, c2);
float f = Mathf.Max(f1, f2);
box.center = new Vector3((l + r) / 2, (b + t) / 2, (c + f) / 2 );
box.size = new Vector3(r - l, t - b, f - c);
return box;
}
}
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