/// <summary>
/// 生成路径的递归函数
/// </summary>
/// <param name="lightningSegment">需要划分的线段</param>
/// <param name="fractalTime">当前递归次数</param>
/// <param name="maxFractalTime">最大递归次数</param>
/// <param name="baseAttenuation">基础衰减</param>
/// <param name="offsetRange">偏离值的范围</param>
/// <param name="direction">闪电方向</param>
/// <param name="forward">与闪电方向垂直的一个单位向量</param>
/// <param name="right">与闪电方向垂直的一个单位向量</param>
/// <param name="branchChance">生成分支的几率</param>
private void GetFractcalLightning(LightningSegment lightningSegment, int fractalTime, int maxFractalTime, float baseAttenuation, Vector2 offsetRange, Vector3 direction, Vector3 forward, Vector3 right, float branchChance = 0f)
{
if (!lightningSegment.isLeaf() || fractalTime > maxFractalTime)
{
return;
}
float zOffset = Mathf.Exp(-baseAttenuation * fractalTime) * Random.Range(offsetRange.x, offsetRange.y);
float xOffset = Mathf.Exp(-baseAttenuation * fractalTime) * Random.Range(offsetRange.x, offsetRange.y);
Vector3 mid = lightningSegment.Middle() + xOffset * right + zOffset * forward;
lightningSegment.LeftChild = new LightningSegment(lightningSegment.start, mid);
lightningSegment.LeftChild.fractal = fractalTime + 1;
lightningSegment.LeftChild.uv = lightningSegment.uv - LightningCreator.arrayForUV[lightningSegment.LeftChild.fractal];
lightningSegment.RightChild = new LightningSegment(mid, lightningSegment.end);
lightningSegment.RightChild.fractal = fractalTime + 1;
lightningSegment.RightChild.uv = lightningSegment.uv + LightningCreator.arrayForUV[lightningSegment.RightChild.fractal];
GetFractcalLightning(lightningSegment.LeftChild, fractalTime + 1, maxFractalTime, baseAttenuation, offsetRange, direction, forward, right, branchChance);
GetFractcalLightning(lightningSegment.RightChild, fractalTime + 1, maxFractalTime, baseAttenuation, offsetRange, direction, forward, right, branchChance);
if (Random.Range(0f, 1f) < branchChance)
{
//制作h形片段
zOffset = Mathf.Exp(-baseAttenuation * fractalTime) * Random.Range(offsetRange.x, offsetRange.y);
xOffset = Mathf.Exp(-baseAttenuation * fractalTime) * Random.Range(offsetRange.x, offsetRange.y);
float yOffset = Mathf.Exp(-baseAttenuation * fractalTime) * Random.Range(offsetRange.x, offsetRange.y);
Vector3 branchEnd = lightningSegment.Middle() + xOffset * right + zOffset * forward + yOffset * direction;
lightningSegment.Branch = new LightningSegment(mid, branchEnd);
lightningSegment.Branch.fractal = fractalTime + 1;
lightningSegment.Branch.uv = lightningSegment.uv + LightningCreator.arrayForUV[lightningSegment.Branch.fractal];
GetFractcalLightning(lightningSegment.Branch, fractalTime + 1, maxFractalTime, baseAttenuation, offsetRange, direction, forward, right, branchChance);
}
}
public LightningSegment(Vector3 s, Vector3 e)
{
start = s;
end = e;
LeftChild = null;
RightChild = null;
Branch = null;
uv = 0.5f;
fractal = 1;
}
public void CreateLightning(Vector3 start, Vector3 end)
{
if (start == end)
{
return;
}
float Length = (end - start).magnitude;
trunk = new LightningSegment(start, end);
Vector2 OffsetRange = Length * new Vector2(MinOffset, MaxOffset);
//计算一个正交基
Vector3 LightningDir = end - start;
//找到不为0的一个分量
Vector3 forward;
if (LightningDir.x != 0)
{
forward = new Vector3(-(LightningDir.y + LightningDir.z) / LightningDir.x, 1, 1);
}
else if (LightningDir.y != 0)
{
forward = new Vector3(1, -(LightningDir.x + LightningDir.z) / LightningDir.y, 1);
}
else if (LightningDir.z != 0)
{
forward = new Vector3(1, 1, -(LightningDir.x + LightningDir.y) / LightningDir.z);
}
else
{
return;
}
forward.Normalize();
Vector3 right = Vector3.Cross(LightningDir, forward);
right.Normalize();
LightningDir.Normalize();
GetFractcalLightning(trunk, 1, FractalTime, BaseAttenuation, OffsetRange, LightningDir, forward, right, BranchChance);
Mesh mesh = MakeMesh(trunk, Radius, RadiusAttenuation, Observer.position, Length);
//创造新的闪电
GameObject go = Instantiate(templet) as GameObject;
go.GetComponent <MeshFilter>().mesh = mesh;
go.transform.position = Vector3.zero;
go.transform.parent = transform;
go.SetActive(true);
}
private Mesh MakeMesh(LightningSegment lightningSegment, float radius, float attenuation, Vector3 obPos, float length)
{
Mesh mesh = new Mesh();
List <Vector3> vertices = new List <Vector3>();
List <int> triangles = new List <int>();
List <Vector2> uvs = new List <Vector2>();
int idx = 0;
SegmentToMesh(lightningSegment, vertices, triangles, uvs, obPos, radius, attenuation, ref idx);
mesh.SetVertices(vertices);
mesh.triangles = triangles.ToArray();
mesh.SetUVs(0, uvs);
mesh.RecalculateNormals();
mesh.RecalculateBounds();
mesh.RecalculateTangents();
return(mesh);
}
/// <summary>
/// 填充Mesh的递归函数
/// </summary>
/// <param name="lightningSegment">需要生成Mesh的线段</param>
/// <param name="vertices"></param>
/// <param name="triangle"></param>
/// <param name="uv"></param>
/// <param name="obPos">摄像机位置</param>
/// <param name="radius">当前的闪电粗细</param>
/// <param name="attenuation">分支闪电的衰减程度</param>
/// <param name="idx">顶点序号</param>
private void SegmentToMesh(LightningSegment lightningSegment, List <Vector3> vertices, List <int> triangle,
List <Vector2> uv, Vector3 obPos, float radius, float attenuation, ref int idx)
{
if (lightningSegment.isLeaf())
{
Vector3 zMid = lightningSegment.Middle();
Vector3 zNormal = Vector3.Cross(zMid - obPos, lightningSegment.end - lightningSegment.start).normalized;
var finalR = radius * attenuation;
if (lightningSegment.Branch == null)
{
//Z型片段的Mesh生成
vertices.Add(lightningSegment.start + finalR * zNormal);
vertices.Add(lightningSegment.start - finalR * zNormal);
vertices.Add(lightningSegment.end + finalR * zNormal);
vertices.Add(lightningSegment.end - finalR * zNormal);
triangle.Add(idx + 1);
triangle.Add(idx);
triangle.Add(idx + 2);
triangle.Add(idx + 1);
triangle.Add(idx + 2);
triangle.Add(idx + 3);
uv.Add(new Vector2(1, lightningSegment.uv));
uv.Add(new Vector2(0, lightningSegment.uv));
uv.Add(new Vector2(1, lightningSegment.uv));
uv.Add(new Vector2(0, lightningSegment.uv));
idx += 4;
}
}
else
{
SegmentToMesh(lightningSegment.LeftChild, vertices, triangle, uv, obPos, radius, attenuation, ref idx);
SegmentToMesh(lightningSegment.RightChild, vertices, triangle, uv, obPos, radius, attenuation, ref idx);
if (lightningSegment.Branch != null)
{
SegmentToMesh(lightningSegment.Branch, vertices, triangle, uv, obPos, radius * attenuation, attenuation, ref idx);
}
}
}
// Update is called once per frame
void Update()
{
bool forward, back, left, right;
forward = Input.GetKey(KeyCode.W);
back = Input.GetKey(KeyCode.S);
left = Input.GetKey(KeyCode.A);
right = Input.GetKey(KeyCode.D);
Vector3 camRight = Vector3.Cross(new Vector3(0, 1, 0), curentCamera.transform.forward).normalized;
Vector3 camForward = -Vector3.Cross(new Vector3(0, 1, 0), camRight).normalized;
Vector2 localClick = new Vector2();
Camera cam = GameDirector.Director.currentCamera.GetComponent <Camera>();
if (RectTransformUtility.RectangleContainsScreenPoint(Q, Input.mousePosition) && Input.GetMouseButtonDown(0))
{
Debug.Log("Q skill");
foreach (GameObject enemy in GameDirector.Director.enemiesSpawned)
{
enemy.GetComponent <SlimeMovement>().stun(this.gameObject);
LightningSegment.spawnLightningChain(this.gameObject, enemy, lightningLine);
//Debug.Break();
}
}
else if (RectTransformUtility.RectangleContainsScreenPoint(W, Input.mousePosition) && Input.GetMouseButtonDown(0))
{
Debug.Log("W skill");
}
else if (RectTransformUtility.RectangleContainsScreenPoint(E, Input.mousePosition) && Input.GetMouseButtonDown(0))
{
Debug.Log("E skill");
}
else if (RectTransformUtility.RectangleContainsScreenPoint(R, Input.mousePosition) && Input.GetMouseButtonDown(0))
{
Debug.Log("R skill");
Instantiate(spookPrefab, this.transform);
GameDirector.Director.mainLight.GetComponent <Light>().intensity = 0;
Invoke("lightBackOn", 10);
}
else
{
RaycastHit retVal = new RaycastHit();
Physics.Raycast(curentCamera.GetComponent <Camera>().ScreenPointToRay(Input.mousePosition), out retVal);
Vector3 wantDir = new Vector3();
SlimeMovement attackTarget = null;
if (retVal.collider != null)
{
SlimeMovement enemyHit = retVal.transform.gameObject.GetComponent <SlimeMovement>();
if (enemyHit != null)
{
wantDir = enemyHit.transform.position - this.transform.position;
if ((enemyHit.transform.position - this.transform.position).magnitude < attackRange && Input.GetMouseButtonDown(0))
{
attackTarget = enemyHit;
}
}
else
{
wantDir = retVal.point + new Vector3(0, this.transform.position.y, 0) - this.transform.position;
}
wantDir = wantDir.normalized * moveSpeed;
/*if (wantDir.magnitude > moveSpeed)
* {
* wantDir = wantDir.normalized * moveSpeed;
* }
* else if (wantDir.magnitude < moveSpeed / 2)
* {
* wantDir = wantDir.normalized * moveSpeed/2;
* }*/
Debug.DrawRay(this.transform.position, wantDir, Color.cyan);
if (Time.time - moveTime > 0 && Input.GetMouseButtonDown(0))
{
float jump = Random.value > .7 ? moveSpeed : 0;
phys.velocity = new Vector3(wantDir.x, phys.velocity.y + jump, wantDir.z);
moveTime = Time.time + moveDownTime;
//Debug.Log("moved!");
}
}
if (attackTarget && Time.time - nextAttackTime > 0)
{
energy += attack(attackTarget);
nextAttackTime = Time.time + attackCoolDown;
}
}
/*Vector3 newMove = new Vector3();
* newMove.y = phys.velocity.y;
* if (forward) newMove += moveSpeed*camForward;
* if (back) newMove += -moveSpeed * camForward;
* if (left) newMove += -moveSpeed * camRight;
* if (right) newMove += moveSpeed * camRight;
*/
//Debug.DrawRay(this.transform.position, camRight, Color.green);
//Debug.DrawRay(this.transform.position, camForward, Color.red);
//phys.velocity = newMove;
}
private float attack(SlimeMovement enemy)
{
LightningSegment.spawnLightningChain(this.gameObject, enemy.gameObject, lightningLine);
enemy.damage(1);
return(1);
}
