如何查找曲线上的点并显示它们？

所以我有这样的代码，其从阵列获取数据，并绘制曲线：如何查找曲线上的点并显示它们？

void drawDataLine(int row) { 
    beginShape(); 
    for (int col = 0; col < colCount; col++) { 
    if (data.isValid(row, col)) { 
     float value = data.getPoint(row, col); 
     float x = map(years[col], yearMin, yearMax, plotX1, plotX2); 
     float y = map(value, dataMin, dataMax, plotY2, plotY1); 
     //vertex(x,y) ;  
     curveVertex(x, y); 
     // Double the curve points for the start and stop 
     if ((col == 0) || (col == colCount-1)) { 
     curveVertex(x, y); 
     } 
    } 
    } 
    endShape(); 
}

我有当光标内3个像素的点的，其显示数据值的另一个函数：

for (int col = 0; col < colCount; col++) { 

    if (data.isValid(row, col)) { 
     float radVal = ratio[col]; 
     float value = data.getPoint(row, col); 
     float compareValue = compare.getPoint(row, col); 
     float x = map(years[col], yearMin, yearMax, plotX1, plotX2); 
     float y = map(value, dataMin, dataMax, plotY2, plotY1); 
     float ellipse1MapVal = map(value, ellipse1Min, ellipse1Max, 10, 80); 
     float ellipse2MapVal = map(compareValue, ellipse1Min, ellipse1Max, 10, 80); 
     radVal = map(radVal, radMin, radMax, 1, 7); 

     if (dist(mouseX, mouseY, x, y) < 3) { 
     if (drawCirclesPrimary || drawCirclesSecondary) { 
      noStroke(); 
      if (drawCirclesPrimary) { 
      fill(0, 255, 0, 100); 
      ellipse(x, y, ellipse1MapVal, ellipse1MapVal); 
      } 
      if (drawCirclesSecondary) { 
      fill(255, 0, 0, 100); 
      ellipse(x, y, ellipse2MapVal, ellipse2MapVal); 
      } 
      fill(0); 
      stroke(0); 
      pushMatrix(); 
      translate(x, y); 
      rotate(radians(radSec)); 
      line(0, -ellipse1MapVal/2, 0, ellipse1MapVal/2); 
      popMatrix(); 
      radSec += radVal; 
      textSize(10); 
      textAlign(CENTER); 
      text(nf(value, 0, 2) + " (" + years[col] + ")"+nf(compareValue, 0, 2), x, y-8); 
     } 
     else 
      text(nf(value, 0, 2) + " (" + years[col] + ")", x, y-8); 
     } 
     if ((mouseX < x+3)&&(mouseX > x-3)) 
     { 
     stroke(150); 
     strokeWeight(1); 
     line(x, plotY1, x, plotY2); 
     } } }}

现在的问题是，curveVertex做它的插值，并做出很好的曲线，但我不能得到除我已经有的曲线以外的曲线上的点。我想要的是光标显示图上所有点上的值，而不是我在数组上的10个点，就像谷歌或雅虎财经上的图表一样。当谈到处理时，我是一个noob，因此任何帮助都将不胜感激。

问候

来源

2012-03-12 allgored