using UnityEngine;
using System.Collections;
using System.Collections.Generic;
[RequireComponent(typeof(UnityEngine.LineRenderer))]
public class DrawCircle : MonoBehaviour
{
public enum CircleHeight
{
Center, Bottom, Top
};
public CircleHeight circleheight;
[Range(0, 50)]
public int segments = 50;
[Range(1, 50)]
public float xradius = 1.5f;
[Range(1, 50)]
public float yradius = 1.5f;
[Range(-10, 10)]
public float height = 0;
public bool changeBothRadius = false;
[Range(0.1f, 2)]
public float lineThickness = 0.1f;
public bool minimumRadius = false;
public bool draw = false;
public bool animateCircle = false;
public float animationSpeed = 0.5f;
private LineRenderer line;
private Renderer renderer;
private float Bottom;
private float Top;
private float Center = 0;
private float t = 0f;
void Start()
{
circleheight = CircleHeight.Center;
line = gameObject.GetComponent<UnityEngine.LineRenderer>();
line.positionCount = segments + 1;
line.useWorldSpace = false;
renderer = gameObject.GetComponent<Renderer>();
Bottom = transform.InverseTransformPoint(renderer.bounds.min).y + 0.1f;
Top = transform.InverseTransformPoint(renderer.bounds.max).y + 0.1f;
}
void Update()
{
line.startWidth = lineThickness;
line.endWidth = lineThickness;
if (draw)
{
line.enabled = true;
CreatePoints();
}
else
{
line.enabled = false;
}
}
bool animStart = true;
void CreatePoints()
{
float x;
float z;
float angle = 20;
if (animateCircle == false)
{
switch (circleheight)
{
case CircleHeight.Center:
height = Center;
break;
case CircleHeight.Bottom:
height = Bottom;
break;
case CircleHeight.Top:
height = Top;
break;
}
}
else
{
AnimateCircle(Top, Bottom);
}
for (int i = 0; i < (segments + 1); i++)
{
x = Mathf.Sin(Mathf.Deg2Rad * angle) * xradius;
z = Mathf.Cos(Mathf.Deg2Rad * angle) * yradius;
line.SetPosition(i, new Vector3(x, height, z));
angle += (360f / segments + 1);
}
}
private void AnimateCircle(float From, float To)
{
if (animStart)
{
if (height == Center)
{
height = Mathf.Lerp(Center, From, t);
t += animationSpeed * Time.deltaTime;
if (height == From)
{
animStart = false;
}
}
}
}
}
我正在使用animateCircle标志来防止枚举始终将高度重置为Center：
if (animateCircle == false)
然后我添加了一个断点，它没有再传入，而是一直在执行其他部分：
else
{
AnimateCircle(Top, Bottom);
}
而且我在AnimateCircle方法中进行处理后看到高度值为0.6。
但是然后我在行上也添加了一个断点：
line.SetPosition(i, new Vector3(x, height, z));
第一个循环的高度为0.6，但是当循环结束时，当i = 50时，循环又重新开始，我看到高度为0。但是我没有在其他任何地方重设高度。
这是AnimateCircle方法未使用的代码，只是为了显示我尝试过的事情和要执行的操作：
private void AnimateCircle(float From, float To)
{
// From = Top To = Bottom
// height = Center
if (animStart)
{
if (height != From)
{
height = Mathf.Lerp(height, From, t);
}
else
{
height = Mathf.Lerp(From, To, t);
}
t += animationSpeed * Time.deltaTime;
if (height == From || height == To)
animStart = false;
}
else
{
height = Mathf.Lerp(From, To, t);
t += animationSpeed * Time.deltaTime;
if (t > 1.0f)
{
if (To == Top)
{
float temp = To;
To = From;
From = temp;
t = 0.0f;
}
if(To == Bottom)
{
float temp = From;
From = To;
To = temp;
t = 0.0f;
}
}
if (To == Top)
{
height = Mathf.Lerp(Bottom, Top, t);
t += animationSpeed * Time.deltaTime;
if (t > 1.0f)
{
float temp = Top;
Top = Bottom;
Bottom = temp;
t = 0.0f;
}
}
if(To == Bottom)
{
height = Mathf.Lerp(Top, Bottom, t);
t += animationSpeed * Time.deltaTime;
if (t > 1.0f)
{
float temp = Bottom;
Bottom = Top;
Top = temp;
t = 0.0f;
}
}
}
}*/
例如，游戏在枚举默认状态为“开始”中的“中心”时开始。
如果我拨打
AnimateStart(Top, Bottom);或AnimateStart(Bottom, Top);然后在AnimateCircle中，我想根据自己的调用方式将圆从中心移动到顶部或底部。因此，“发自”可以是顶部或底部。
圆圈从中心一次移动到顶部或底部之后，然后在顶部和底部（或底部顶部）之间开始不停的乒乓球。
而且，如果游戏以枚举默认状态（“底部”或“顶部”）开始，则只需在顶部和底部之间启动一个没有中心的乒乓球即可。
编辑：
这是我现在使用的AnimateCircle的代码：
private void AnimateCircle(float From, float To)
{
if (animStart)
{
// prevent t from exceeding tGoal
if (t > tGoal)
{
t = tGoal;
}
// end animation when t reaches goal
if (t == tGoal)
{
animStart = false;
}
// advance height according to t
height = Mathf.Lerp(Bottom, Top, Mathf.PingPong(t, 1f));
// advance height according to time & speed
t += animationSpeed * Time.deltaTime;
}
}
CreatePoints不变：
bool animStart = true;
void CreatePoints()
{
float x;
float z;
float angle = 20;
if (animateCircle == false)
{
switch (circleheight)
{
case CircleHeight.Center:
// t=0.5f, tGoal=1f to go to top first then stop at top
// t=0.5f, tGoal=2f to go to top first then stop at bottom
// t=1.5f, tGoal=2f to go to bottom first then stop at bottom
// t=1.5f, tGoal=3f to go to bottom first then stop at top
t = 0.5f;
tGoal = 2f;
height = Center;
break;
case CircleHeight.Bottom:
t = 0f;
tGoal = 1f;
height = Bottom;
break;
case CircleHeight.Top:
t = 1f;
tGoal = 2f;
height = Top;
break;
}
}
else
{
AnimateCircle(Bottom, Top);
}
for (int i = 0; i < (segments + 1); i++)
{
x = Mathf.Sin(Mathf.Deg2Rad * angle) * xradius;
z = Mathf.Cos(Mathf.Deg2Rad * angle) * yradius;
line.SetPosition(i, new Vector3(x, height, z));
angle += (360f / segments + 1);
}
}
为了首先移动到顶部，我将AnimateCircle称为：
AnimateCircle(Top, Bottom);
在AnimateCircle中，顶部，底部也像这样：
height = Mathf.Lerp(Top, Bottom, Mathf.PingPong(t, 1f));
在开关案例部分
t = 0.5f和tGoal = 2f但是，相反，它先是移动到顶部，然后是快速移动到底部，然后又从底部移动到顶部。
但是，如果我更改
t = 1.5f和tGoal = 3f;，它将先移至顶部，然后从顶部移至底部，这很好。但是0.5和2不会先移动它。如果t = 1.5f和tGoal = 2f;它会向上移动到顶部并停在那里。
但是我找不到如何制作“底部”零件，因此它将首先移至“底部”，然后停止或先移至“底部”并移至“顶部”。
最佳答案
添加一个名为tGoal的float字段：
private float tGoal;
根据您希望它开始的位置设置t，并根据您希望它停止动画的位置设置tGoal。如果希望它以
Center开头，则必须确定适当的lerp值以开头： switch (circleheight)
{
case CircleHeight.Center:
float centerT = Mathf.InverseLerp(Bottom, Top, Center);
// t=0f+centerT, tGoal=1f to go to top first then stop at top
// t=0f+centerT, tGoal=2f to go to top first then stop at bottom
// t=2f-centerT, tGoal=2f to go to bottom first then stop at bottom
// t=2f-centerT, tGoal=3f to go to bottom first then stop at top
t = 2f - centerT;
tGoal = 3f;
height = Center;
break;
case CircleHeight.Bottom:
t= 0f;
tGoal = 1f;
height = Bottom;
break;
case CircleHeight.Top:
t = 1f;
tGoal = 2f;
height = Top;
break;
}
然后使用
Mathf.PingPong将t转换为乒乓球的lerp值。当t等于tGoal时停止，确保tGoal永远不会超过它：private void AnimateCircle()
{
if (animStart)
{
// prevent t from exceeding tGoal
if (t > tGoal) {
t = tGoal;
}
// end animation when t reaches goal
if (t == tGoal) {
animStart = false;
}
// advance height according to t
height = Mathf.Lerp(Bottom, Top, Mathf.PingPong(t,1f));
// advance height according to time & speed
t += animationSpeed * Time.deltaTime;
}
}
关于c# - 为什么可变高度值保持为0？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/53859931/