上篇有柱状图于折线图的实现。
这篇主要实现一下柱状图。
实现方式：把圆环体拆分成一个一个的小长方体，如图（顶视图）绿色部分
还是继承ChartBase.cs
上代码：
using System.Collections; using System.Collections.Generic; using UnityEngine; /// <summary> /// 扇形统计图 /// </summary> public class SectorChart : ChartBase { List<float> tempPointY = new List<float>(); /// <summary> /// 展示动画 /// </summary> public override void ShowAnim() { for (int i = 0; i < pointsInfos.Count; i++) { for (int j = 0; j < pointsInfos[i].itemSectorPercent.Length; j++) { int tempI = i; int tempJ = j; StartCoroutine(DoFloatValue(0, pointsInfos[i].itemSectorPercent[j], 1, (value) => { pointsInfos[tempI].itemSectorPercent[tempJ] = value; })); } } } public override void CreateMesh() { for (int i = 0; i < pointsInfos.Count; i++) { if (pointsInfos[i].itemSectorPercent.Length != meshs.Count) { DeleteAllItemObjs(); GameObject tempParent = new GameObject(); tempParent.name = meshName; tempParent.transform.position = Vector3.zero; allChartParentObj.Add(tempParent); for (int j = 0; j < pointsInfos[i].itemSectorPercent.Length; j++) { GameObject itemObj = new GameObject(); itemObj.name = meshName + "_Child_" + j.ToString(); itemObj.transform.parent = tempParent.transform; Mesh mesh = new Mesh(); meshs.Add(mesh); itemObj.AddComponent<MeshFilter>().mesh = mesh; itemObj.AddComponent<MeshRenderer>(); itemObj.GetComponent<MeshRenderer>().material = mat; allChartItemObj.Add(itemObj); } } } } /// <summary> /// 当前这个扇形的起始角度 /// </summary> float pieceAngle = 0; /// <summary> /// 当前这个扇形的结束角度 /// </summary> float nextAngle = 0; public override void SetMeshInfo() { triangles.Clear(); verticesAddOffset.Clear(); pieceAngle = 0; nextAngle = 0; for (int j = 0; j < pointsInfos[0].itemSectorPercent.Length; j++) { Vector3[] vertices = GetPointsVector3s(pointsInfos[0], j); verticesAddOffset.Add(new PointsInfo(SetVerticesOffset(vertices, pointsInfos[0]), Vector3.one)); triangles.Add(GetTrianglesVector3s(vertices)); } } /// <summary> /// 根据顶点和位移差获取最终位置 /// </summary> /// <param name="vertices"></param> /// <param name="index"></param> /// <returns></returns> public override Vector3[] SetVerticesOffset(Vector3[] vertices, PointsInfo _points) { Vector3[] tempV3 = new Vector3[vertices.Length]; for (int i = 0; i < vertices.Length; i++) { tempV3[i] = vertices[i]; tempV3[i] += _points.points[0]; } return tempV3; } /// <summary> /// 获取正方体的每个面顶点坐标 （先绘出顶面第一个长方形，再绘制底面第一个长方形，依次连接长方体的面） /// </summary> /// <param name="count"></param> /// <returns></returns> protected Vector3[] GetPointsVector3s(PointsInfo _points, int index) { List<Vector3> tempPoints = new List<Vector3>(); //立方体初始的点，取内圆心 上表面的一个点 Vector3 firstUpPoint = new Vector3(_points.size.x * _points.inCirclePercent, -_points.size.y / 2f, 0); ///上表面的中心点 Vector3 centerUp = center + new Vector3(0, _points.size.y / 2f, 0); if (index == 0) { pieceAngle = 0; } else { pieceAngle += _points.itemSectorPercent[index - 1] * 360f; } nextAngle += _points.itemSectorPercent[index] * 360f; float offsetAngle = nextAngle - pieceAngle; for (int i = 0; i < _points.sertorCount; i++) { //立方体上表面多边形点 List<Vector3> tempUpPoints = new List<Vector3>(); //立方体下表面多边形点 List<Vector3> tempDownPoints = new List<Vector3>(); float tempAngle = pieceAngle + (float)(i) / (float)_points.sertorCount * (nextAngle - pieceAngle); float tempNextAngle = pieceAngle + (float)(i + 1) / (float)_points.sertorCount * (nextAngle - pieceAngle); if (i == 0) { tempUpPoints.Add(RotateAroundByPointByDistance(firstUpPoint, centerUp, Vector3.up, _points.size.x * _points.inCirclePercent, tempAngle, offsetAngle * _points.insertValue)); tempUpPoints.Add(RotateAroundByPointByDistance(firstUpPoint, centerUp, Vector3.up, _points.size.x, tempAngle, offsetAngle * _points.insertValue)); } else { tempUpPoints.Add(RotateAroundByPointByDistance(firstUpPoint, centerUp, Vector3.up, _points.size.x * _points.inCirclePercent, tempAngle)); tempUpPoints.Add(RotateAroundByPointByDistance(firstUpPoint, centerUp, Vector3.up, _points.size.x, tempAngle)); } if (i == _points.sertorCount - 1) { tempUpPoints.Add(RotateAroundByPointByDistance(firstUpPoint, centerUp, Vector3.up, _points.size.x, tempNextAngle, -offsetAngle * _points.insertValue)); tempUpPoints.Add(RotateAroundByPointByDistance(firstUpPoint, centerUp, Vector3.up, _points.size.x * _points.inCirclePercent, tempNextAngle, -offsetAngle * _points.insertValue)); } else { tempUpPoints.Add(RotateAroundByPointByDistance(firstUpPoint, centerUp, Vector3.up, _points.size.x, tempNextAngle)); tempUpPoints.Add(RotateAroundByPointByDistance(firstUpPoint, centerUp, Vector3.up, _points.size.x * _points.inCirclePercent, tempNextAngle)); } for (int j = 0; j < tempUpPoints.Count; j++) { tempDownPoints.Add(tempUpPoints[j] - new Vector3(0, _points.size.y, 0)); } tempPoints.AddRange(GetAllTrianglesPoint(tempUpPoints, tempDownPoints)); } return tempPoints.ToArray(); } /// <summary> /// 根据上表面下表面的八个顶点确定立方体的所有点位（顺时针排序） /// </summary> /// <param name="inputUpV3s">上表面的四个点</param> /// <param name="inputDownV3s">下表面的四个点</param> /// <returns></returns> Vector3[] GetAllTrianglesPoint(List<Vector3> inputUpV3s, List<Vector3> inputDownV3s, string ceMian = "Both") { Vector3[] outPutPoints = new Vector3[24]; //顶面 for (int i = 0; i < inputUpV3s.Count; i++) { outPutPoints[i] = inputUpV3s[i]; } //内侧 outPutPoints[4] = inputUpV3s[0]; outPutPoints[5] = inputUpV3s[3]; outPutPoints[6] = inputDownV3s[3]; outPutPoints[7] = inputDownV3s[0]; //右面 if (ceMian == "Both" || ceMian == "Right") { outPutPoints[8] = inputUpV3s[3]; outPutPoints[9] = inputUpV3s[2]; outPutPoints[10] = inputDownV3s[2]; outPutPoints[11] = inputDownV3s[3]; } //外侧 outPutPoints[12] = inputUpV3s[2]; outPutPoints[13] = inputUpV3s[1]; outPutPoints[14] = inputDownV3s[1]; outPutPoints[15] = inputDownV3s[2]; //左面 if (ceMian == "Both" || ceMian == "Left") { outPutPoints[16] = inputUpV3s[1]; outPutPoints[17] = inputUpV3s[0]; outPutPoints[18] = inputDownV3s[0]; outPutPoints[19] = inputDownV3s[1]; } //底面 outPutPoints[20] = inputDownV3s[3]; outPutPoints[21] = inputDownV3s[2]; outPutPoints[22] = inputDownV3s[1]; outPutPoints[23] = inputDownV3s[0]; return outPutPoints; } public Vector3 RotateAroundByPointByDistance(Vector3 selfPoint, Vector3 rotatePoint, Vector3 axis, float distance, float angle, float offsetAngle = 0) { Quaternion q = Quaternion.AngleAxis(angle + offsetAngle, axis); Vector3 distanceOffset = Vector3.ProjectOnPlane(Vector3.Normalize(new Vector3((1 - axis.x) * selfPoint.x, (1 - axis.y) * selfPoint.y, (1 - axis.z) * selfPoint.z) - new Vector3((1 - axis.x) * rotatePoint.x, (1 - axis.y) * rotatePoint.y, (1 - axis.z) * rotatePoint.z)), axis) * distance; return q * distanceOffset; } } public partial class PointsInfo { /// <summary> /// 内圈比例 /// </summary> public float inCirclePercent; /// <summary> /// 扇形之间的间隔 /// </summary> public float insertValue; /// <summary> /// 多边形边数 /// </summary> public int sertorCount; /// <summary> /// 每个扇形的百分比 /// </summary> public float[] itemSectorPercent; public PointsInfo(Vector3[] _points, Vector3 _size, float _percent, float _insertValue, int _sertorCount, float[] _itemSectorPercent) { points = _points; size = _size; inCirclePercent = _percent; insertValue = _insertValue; sertorCount = _sertorCount; itemSectorPercent = _itemSectorPercent; } }