ugui之圆角矩形头像实现
2024-08-25 16:03:21
这个是参考大神的修改了一下渲染方式实现的，可以去查看原帖的，原贴是圆形头像，原理讲的非常详细
我写的这个只支持正方形图片，效果是酱紫的~
一共三个代码，还需要两个代码，原帖里都有的，我只是修改了其中一个。
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Sprites; [AddComponentMenu("UI/Circle Image")]
public class CircleImage1 : BaseImage {
// Use this for initialization
void Awake () {
innerVertices = new List<Vector3>();
outterVertices = new List<Vector3>();
} // Update is called once per frame
void Update () { } [Range(, )]
public float scale = 1f; [Range(, )]
public int segements = ; private List<Vector3> innerVertices;
private List<Vector3> outterVertices; protected override void OnPopulateMesh(VertexHelper vh)
{ vh.Clear();
Rect pixelAdjustedRect = this.GetPixelAdjustedRect(); Vector4 uv = overrideSprite != null ? DataUtility.GetOuterUV(overrideSprite) : Vector4.zero;
//Debug.LogError("uv:" + uv+","+uv.w+","+uv.x+","+uv.y+","+uv.z); Vector2 u = new Vector2(, );
float w = pixelAdjustedRect.width; #region
//
for (int i =; i < segements+; i++)
{
UIVertex uivertex = new UIVertex();
uivertex.color = color;
if (i ==)
{
//半径*
uivertex.uv0 = new Vector2(uv.x + (scale / ) * (uv.z - uv.x) * ( - Mathf.Sin(i * / segements)), uv.y + (scale / ) * (uv.w - uv.y) * ( - Mathf.Cos(i * / segements)));
u = new Vector2((scale / ) * ( - Mathf.Sin(i * / segements)),(scale / ) * ( - Mathf.Cos(i * / segements)));
}
else
{
uivertex.uv0 = new Vector2(uv.x + (scale / ) * (uv.z - uv.x) * ( - Mathf.Sin(Mathf.PI / (180f / (i * / segements)))), uv.y + (scale / ) * (uv.w - uv.y) * ( - Mathf.Cos(Mathf.PI / (180f / (i * / segements)))));
u = new Vector2((scale / ) * ( - Mathf.Sin(Mathf.PI / (180f / (i * / segements)))),(scale / ) * ( - Mathf.Cos(Mathf.PI / (180f / (i * / segements)))));
}
uivertex.position = new Vector3(w * u.x - w / , w * u.y - w / ); vh.AddVert(uivertex);
}
//
for (int i = ; i < segements + ; i++)
{
UIVertex uivertex = new UIVertex();
uivertex.color = color;
if (i == )
{
uivertex.uv0 = new Vector2(uv.x + (uv.z - uv.x) * (scale / ) * ( - Mathf.Cos(i * / segements)), uv.y + (uv.w - uv.y) * (( - scale / ) + (scale / ) * Mathf.Sin(i * / segements)));
u = new Vector2((scale / ) - (scale / ) * Mathf.Cos(i * / segements), ( - scale / ) + (scale / ) * Mathf.Sin(i * / segements));
}
else
{
uivertex.uv0 = new Vector2(uv.x + (uv.z - uv.x) * (scale / ) * ( - Mathf.Cos(Mathf.PI / (180f / (i * / segements)))), uv.y + (uv.w - uv.y) * (( - scale / ) + (scale / ) * Mathf.Sin(Mathf.PI / (180f / (i * / segements)))));
u = new Vector2( (scale / ) * ( - Mathf.Cos(Mathf.PI / (180f / (i * / segements)))), ( - scale / ) + (scale / ) * Mathf.Sin(Mathf.PI / (180f / (i * / segements))));
}
uivertex.position = new Vector3(w * u.x - w / , w * u.y - w / );
vh.AddVert(uivertex);
}
//
for (int i = ; i < segements + ; i++)
{
UIVertex uivertex = new UIVertex();
uivertex.color = color;
if (i == )
{
uivertex.uv0 = new Vector2(uv.x + (uv.z - uv.x) * (( - scale / ) + (scale / ) * Mathf.Sin(i * / segements)), uv.y + (uv.w - uv.y) * (( - scale / ) + (scale / ) * Mathf.Cos(i * / segements)));
u = new Vector2(( - scale / ) + (scale / ) * Mathf.Sin(i * / segements), ( - scale / ) + (scale / ) * Mathf.Cos(i * / segements));
}
else
{
uivertex.uv0 = new Vector2(uv.x + (uv.z - uv.x) * (( - scale / ) + (scale / ) * Mathf.Sin(Mathf.PI / (180f / (i * / segements)))), uv.y + (uv.w - uv.y) * (( - scale / ) + (scale / ) * Mathf.Cos(Mathf.PI / (180f / (i * / segements)))));
u= new Vector2(( - scale / ) + (scale / ) * Mathf.Sin(Mathf.PI / (180f / (i * / segements))), ( - scale / ) + (scale / ) * Mathf.Cos(Mathf.PI / (180f / (i * / segements))));
}
uivertex.position = new Vector3(w * u.x - w / , w * u.y - w / );
vh.AddVert(uivertex);
}
//
for (int i = ; i < segements + ; i++)
{
UIVertex uivertex = new UIVertex();
uivertex.color = color;
if (i == )
{
uivertex.uv0 = new Vector2(uv.x + (uv.z - uv.x) * (( - scale / ) + (scale / ) * Mathf.Cos(i * / segements)), uv.y + (uv.w - uv.y) * ((scale / ) - (scale / ) * Mathf.Sin(i * / segements)));
u = new Vector2(( - scale / ) + (scale / ) * Mathf.Cos(i * / segements), (scale / ) - (scale / ) * Mathf.Sin(i * / segements));
}
else
{
uivertex.uv0 = new Vector2(uv.x + (uv.z - uv.x) * (( - scale / ) + (scale / ) * Mathf.Cos(Mathf.PI / (180f / (i * / segements)))), uv.y + (uv.w - uv.y) * ((scale / ) - (scale / ) * Mathf.Sin(Mathf.PI / (180f / (i * / segements)))));
u = new Vector2(( - scale / ) + (scale / ) * Mathf.Cos(Mathf.PI / (180f / (i * / segements))), (scale / ) - (scale / ) * Mathf.Sin(Mathf.PI / (180f / (i * / segements))));
}
uivertex.position = new Vector3(w * u.x - w / , w * u.y - w / );
vh.AddVert(uivertex);
} //（（点*4+8个点-3）条弦+1）个三角形
for (int i = ; i < ((segements - ) * + - + ); i++)
{
vh.AddTriangle(, i + , i + );
}
#endregion
} public override bool IsRaycastLocationValid(Vector2 screenPoint, Camera eventCamera)
{
// Sprite sprite = overrideSprite;
// if (sprite == null)
// return true; // Debug.LogError("鼠标点击:" + screenPoint); // Vector2 local;
// RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform, screenPoint, eventCamera, out local);
return true;
} private bool Contains(Vector2 p, List<Vector3> outterVertices, List<Vector3> innerVertices)
{
var crossNumber = ;
RayCrossing(p, innerVertices, ref crossNumber);//检测内环
RayCrossing(p, outterVertices, ref crossNumber);//检测外环
return (crossNumber & ) == ;
} /// <summary>
/// 使用RayCrossing算法判断点击点是否在封闭多边形里
/// </summary>
/// <param name="p"></param>
/// <param name="vertices"></param>
/// <param name="crossNumber"></param>
private void RayCrossing(Vector2 p, List<Vector3> vertices, ref int crossNumber)
{
for (int i = , count = vertices.Count; i < count; i++)
{
var v1 = vertices[i];
var v2 = vertices[(i + ) % count]; //点击点水平线必须与两顶点线段相交
if (((v1.y <= p.y) && (v2.y > p.y))
|| ((v1.y > p.y) && (v2.y <= p.y)))
{
//只考虑点击点右侧方向，点击点水平线与线段相交，且交点x > 点击点x，则crossNumber+1
if (p.x < v1.x + (p.y - v1.y) / (v2.y - v1.y) * (v2.x - v1.x))
{
crossNumber += ;
}
}
}
} }
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