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发表时间:2010-12-22
最后修改:2010-12-22
年风向/风能玫瑰图如下所示:一个坐标轴及四个同心团,在同心团分16个区间画弧。
public class DrawWindRoseChartImpl implements IDrawWindRoseChart { private DecimalFormat df = new DecimalFormat("#00.00"); private int circleNumber = 4; // 圆的圈数 = 4; private int space = 10; // 方向标注离图形的空隙 private int edgSpace = 30; // 图形周边留出的空隙大小,此空隙大小必须至少等于3 * space public BufferedImage drawYearWindRose(int gWidth, Map<Integer, Double> map, RoseChartTypeEnum chartType) throws Exception { int gHeight = gWidth + edgSpace; // 加上edgSpace宽度用来写图形的标题 BufferedImage image = new BufferedImage(gWidth, gHeight, BufferedImage.TYPE_INT_ARGB); Graphics2D g2 = image.createGraphics(); String type = ""; if (chartType == RoseChartTypeEnum.YEAR_WIND_DIRECTION) type = "风向"; else if (chartType ==RoseChartTypeEnum.YEAR_WIND_POWER) { type = "风能"; }else{ throw new RuntimeException("此方法不能画所要求的风玫瑰图!"); } String title = "年" + type + "玫瑰图"; g2.setBackground(Color.WHITE); // 画板 g2.fillRect(0, 0, gWidth, gHeight); // 基准点距离,当x,y坐标都为基准点距离时就是圆心 int centerPoint = gWidth / 2; // 最大圆半径 int maxRadius = gWidth / 2 - edgSpace; // 步长 double step = maxRadius / circleNumber; g2.setColor(Color.BLACK); // 西方向在右边,标注会占距离,所以space*2 g2.drawString("W", centerPoint - maxRadius - 2 * space, centerPoint); // 画x轴 g2.drawLine(centerPoint - maxRadius, centerPoint, centerPoint + maxRadius, centerPoint); g2.drawString("E", centerPoint + maxRadius + space, centerPoint); g2.drawString("0", centerPoint, centerPoint - maxRadius - space); g2.drawString("N", centerPoint, centerPoint - maxRadius - 2 * space); // 画y轴 g2.drawLine(centerPoint, centerPoint - maxRadius, centerPoint, centerPoint + maxRadius); // 南方向在下边,标注会占距离,所以space*2 g2.drawString("180", centerPoint - space, centerPoint + maxRadius + 2 * space); g2.drawString("S", centerPoint, centerPoint + maxRadius + 3 * space); g2.drawString(title, centerPoint - 3 * space, gHeight - space); //不管是否有数据,都必须把坐标及同心圆画上 for (int i = 1; i <= circleNumber; i++) { // step * i即为所画当前圆的半径 int radius = (int) Math.ceil(step * i) + 1; g2.drawOval(centerPoint - radius, centerPoint - radius, radius * 2, radius * 2); } // 只有当有数据时,才标注圆所代表的比例及画弧 if (map != null && map.size() > 0) { // 最大比率 double maxRation = Collections.max(map.values()); // 标注比例 for (int i = 1; i <= circleNumber; i++) { // step * i即为所画当前圆的半径 int radius = (int) Math.ceil(step * i) + 1; int dis = (int) (Math.cos(Math.PI / 4) * radius); // 标注圆代表的比例数 g2.drawString(df.format(maxRation / circleNumber * i * 100) + "%", centerPoint + dis, centerPoint - dis); } g2.setColor(Color.RED); double startAngle = 0.0; double arcAngle = -22.5; // 画弧 for (Map.Entry<Integer, Double> entry : map.entrySet()) { double arcRadius = Math.rint(entry.getValue() / maxRation * maxRadius); int key = entry.getKey(); // 即是第0风向区,-11.25~11.25 // 因为awt画弧时0度点与风向玫瑰图的0度点相差90度,所以给画弧的开始点集体加上90度 if (key == 0) startAngle = 90 + 11.25; else { double angle = -key * 22.5; startAngle = angle + 90; } Arc2D.Double arc = new Arc2D.Double(centerPoint - arcRadius, centerPoint - arcRadius, arcRadius * 2, arcRadius * 2, startAngle, arcAngle, Arc2D.PIE); // 使用awt画弧 g2.draw(arc); } } g2.dispose(); return image; } private void drawOneWindRose(Graphics2D g2, int xOffset, int yOffset, int gWidth, Map<Integer, Double> map, int month) throws Exception { String title = month + "月"; // 同心圆圆心坐标 int xCenter = xOffset + gWidth / 2; int yCenter = yOffset + gWidth / 2; // 最大圆半径 int maxRadius = gWidth / 2 - edgSpace; // 步长 double step = maxRadius / circleNumber; g2.setColor(Color.BLACK); // 西方向在右边,标注会占距离,所以space*2 g2.drawString("W", xCenter - maxRadius - 2 * space, yCenter); // 画x轴 g2.drawLine(xCenter - maxRadius, yCenter, xCenter + maxRadius, yCenter); g2.drawString("E", xCenter + maxRadius + space, yCenter); g2.drawString("0", xCenter, yCenter - maxRadius - space); g2.drawString("N", xCenter, yCenter - maxRadius - 2 * space); // 画y轴 g2.drawLine(xCenter, yCenter - maxRadius, xCenter, yCenter + maxRadius); g2.drawString("180", xCenter - space, yCenter + maxRadius + 2 * space); g2.drawString("S", xCenter, yCenter + maxRadius + 3 * space); g2.drawString(title, xCenter + maxRadius, yCenter - maxRadius); //不管当月是否有数据,都必须把同心圆画上 for (int i = 1; i <= circleNumber; i++) { // step * i即为所画当前圆的半径 int radius = (int) Math.ceil(step * i) + 1; g2.drawOval(xCenter - radius, yCenter - radius, radius * 2, radius * 2); } // 只有当有数据时,才标注圆所代表的比例及画弧 if (map != null && map.size() > 0) { // 最大比率 double maxRation = Collections.max(map.values()); // 标注比例 for (int i = 1; i <= circleNumber; i++) { // step * i即为所画当前圆的半径 int radius = (int) Math.ceil(step * i) + 1; int dis = (int) (Math.cos(Math.PI / 4) * radius); // 标注圆代表的比例数 g2.drawString(df.format(maxRation / circleNumber * i * 100) + "%", xCenter + dis, yCenter - dis); } g2.setColor(Color.RED); double startAngle = 0.0; double arcAngle = -22.5; for (Map.Entry<Integer, Double> entry : map.entrySet()) { double arcRadius = Math.rint(entry.getValue() / maxRation * maxRadius); int key = entry.getKey(); // 即是第0风向区,-11.25~11.25 // 因为awt画弧时0度点与风向玫瑰图的0度点相差90度,所以给画弧的开始点集体加上90度 if (key == 0) startAngle = 90 + 11.25; else { double angle = -key * 22.5; startAngle = angle + 90; } Arc2D.Double arc = new Arc2D.Double(xCenter - arcRadius, yCenter - arcRadius, arcRadius * 2, arcRadius * 2, startAngle, arcAngle, Arc2D.PIE); // 使用awt画弧 g2.draw(arc); } } } public BufferedImage drawMonthWindRose(int width, Map<Integer, Map<Integer, Double>> map, RoseChartTypeEnum chartType) throws Exception { //不管有几个月的数据,都画12个图,分四行三列来显示 //height加上edgSpace用来显示图片的标题 int height = width * 4 / 3 + edgSpace; // 每个月的小玫瑰图所占的宽度,每行或每列的间距为space, 列数值最大为3列,所以只有四个间距。 int gWidth = (width - space * 4) / 3; BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); Graphics2D g2 = image.createGraphics(); String type = ""; if (chartType == RoseChartTypeEnum.MONTH_WIND_DIRECTION) type = "风向"; else if (chartType == RoseChartTypeEnum.MONTH_WIND_POWER) { type = "风能"; }else{ throw new RuntimeException("此方法不能画所要求的风玫瑰图!"); } String title = "各月的" + type + "玫瑰图"; // 画板 g2.fillRect(0, 0, width, height); int count = 0; int rowNo = 0; int colNo = 0; int xOffset = 0; int yOffset = 0; //不管是否有数据,都画12个图,每月一个图 for(int i = 1; i <= 12; i++){ rowNo = count / 3; colNo = count % 3; xOffset = colNo * (gWidth + space) + space; yOffset = rowNo * (gWidth + space) + space; Map<Integer, Double> dataMap = (map == null || map.size() == 0) ? null : map.get(i); drawOneWindRose(g2, xOffset, yOffset, gWidth, dataMap, i); count++; } g2.setColor(Color.BLACK); g2.drawString(title, width / 2 - 3 * space, height - 2 * space); g2.dispose(); return image; } } RoseChartTypeEnum代码如下所示:
public enum RoseChartTypeEnum { YEAR_WIND_DIRECTION,YEAR_WIND_POWER,MONTH_WIND_DIRECTION,MONTH_WIND_POWER } 接口 IDrawWindRoseChart代码如下:
public interface IDrawWindRoseChart { /**画风向玫瑰图或风能玫瑰图, * @param gWidth : BufferedImage的宽度值,因为是画圆,所以只传入一个值,高度值gHeight也使用gWidth * @param map : 各扇区的数据集 * @param chartTypeEnum : 所画玫瑰图的类型 * @return */ public BufferedImage drawMonthWindRose( int gWidth, Map<Integer, Map<Integer, Double>> map , RoseChartTypeEnum chartTypeEnum ) throws Exception; public BufferedImage drawYearWindRose( int gWidth, Map<Integer, Double> map ,RoseChartTypeEnum chartTypeEnum) throws Exception; } 声明:ITeye文章版权属于作者,受法律保护。没有作者书面许可不得转载。
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发表时间:2010-12-22
如果画月风向/风能玫瑰图时,如果不一次性画十二图,还是只画那些有数据的月份的图,代码如下:
public BufferedImage drawMonthWindRose( int width, Map<Integer, Map<Integer, Double>> map , RoseChartTypeEnum chartType) throws Exception { int size = map.size(); //月风向玫瑰图每行画3个小玫瑰图,除3计算行数 int rowCount = size % 3 == 0 ? size /3 : (size / 3 + 1); int colCount = size >= 3 ? 3 : size; //如果行数刚好也是3的话,则总图的宽与高相等,高加上edgSpace用来写上图片的title int height = (rowCount % 3 == 0 ? width : width / 3 * rowCount) + edgSpace; width = size >= 3 ? width : width / 3 * size; //每个月的小玫瑰图所占的宽度,每行或每列的间距为20, 列数值最大为3列。 int gWidth = (width - space * (Math.max(rowCount, colCount) + 1)) / colCount; BufferedImage image = new BufferedImage(width , height , BufferedImage.TYPE_INT_ARGB); Graphics2D g2 = image.createGraphics(); String type = ""; if(chartType == RoseChartTypeEnum.MONTH_WIND_DIRECTION ) type = "风向"; else if(chartType == RoseChartTypeEnum.MONTH_WIND_POWER){ type = "风能"; } String title = "各月的" + type + "玫瑰图"; // 画板 g2.fillRect(0, 0, width, height); int count = 0; int rowNo = 0; int colNo = 0; int xOffset = 0; int yOffset = 0; for(Map.Entry<Integer, Map<Integer, Double>> entry : map.entrySet()){ rowNo = count / 3 ; colNo = count % 3 ; xOffset = colNo * (gWidth + space) + space; yOffset = rowNo * (gWidth + space) + space; drawOneWindRose(g2, xOffset, yOffset, gWidth, entry.getValue(), entry.getKey()); count++; } g2.setColor(Color.BLACK); g2.drawString(title, width / 2 - 3 * space, height - 2 * space); g2.dispose(); return image; }代码写得不怎么样,希望大家谅解。
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发表时间:2010-12-22
苍山洱海 写道 what's this?
风电场项目中经常要用到的图例,如果有哪位兄弟有做类似项目的话,应该会有点帮助! |
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发表时间:2010-12-23
非常好的分享,风向玫瑰图的用途很广。投个精华
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发表时间:2010-12-24
Illum 写道 非常好的分享,风向玫瑰图的用途很广。投个精华
非学感谢,终于来了个知道玫瑰图的了 我分享出来就是希望能帮到那些用到玫瑰图的人 |
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发表时间:2010-12-24
看不懂图的意思,不过单纯画线懂几何就行了,嘿嘿。
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