更改水平0軸的畫線方式

原本畫水平0軸線會畫在訊號後方, 當訊號都是水平時會看不到0軸線, 這次修改將0軸線畫在訊號前方

 

processing程式:

// AirView // Plot the graph of the air voltage from Arduino // to predict earthquakes. // Dyson Lin dysonlin@gmail.com // 2016-07-30 05:58 UTC+8 V1.0 // 2016-08-10 15:42 UTC+8 V2.1.3 20x data compression. Change background to Black. // 2016-08-16 21:56 UTC+8 V2.1.9 Plot select range area. // 2016-08-16 22:17 UTC+8 V2.2.0 Adjust text sizes. // 2016-08-17 23:43 UTC+8 V2.2.1 Use noLoop() and redraw() to plot graph only after reading new data. // 2016-08-19 18:40 UTC+8 V2.2.2 10K-Ohom-R Voltage! // 2016-08-19 19:14 UTC+8 V2.2.3 Water Voltage! // 2016-08-20 21:04 UTC+8 V2.2.4 220-Ohom-R Voltage! // 2016-08-24 04:25 UTC+8 V2.2.5 Air Voltage. // 2016-08-26 17:10 UTC+8 V2.2.6 Fix the minData and maxData bug. // 2016-08-27 03:53 UTC+8 V2.2.7 Modify plotData(), plotSelectRange(). // 2016-08-29 01:31 UTC+8 V2.2.8 Comment out noLoop() and redraw(). // 2016-08-29 02:23 UTC+8 V2.2.9 Make the window resizable. // 2016-09-05 22:39 UTC+8 V2.2.9g Save sampled data to file for analysis, modifided by ghosty // 2016-09-20 22:30 UTC+8 V1.0.0 Save more data to file for analysis, modifided by ghosty import processing.serial.*; int runningNumber=1; //added by ghosty, modify this number for multiple arduino boards int startTime = 0; int currentTime = 0; String timeStringStart = null; String dateStringStart = null; String timeStringNow = null; String dateStringNow = null; int graphLeft = 0; int graphRight = 0; int graphTop = 0; int graphBottom = 0; int selectRangeLeft = 0; int selectRangeRight = 0; int selectRangeTop = 0; int selectRangeBottom = 0; int isFirstRead = 1; int maxData = 0; int minData = 0; int maxTime = 0; int minTime = 0; final int compressionRatio = 20; final int bufferLimit = 2 * compressionRatio; // compression ratio = bufferLimit/2. So bufferLimit must be even. int [] buffer = new int[bufferLimit]; int [] bufferTime = new int[bufferLimit]; int bufferNumber = 0; int dataLimit = 1000000; int[] data = new int[dataLimit]; int[] dataTime = new int[dataLimit]; int dataNumber = 0; boolean mouseInZoomArea(int x, int y) {   boolean inZoomArea = false;   int zoomAreaLength = 10;   int zoomLeft = width - zoomAreaLength;;   int zoomRight = width;   int zoomBottom = height;   int zoomTop = height - zoomAreaLength;   if ((x >= zoomLeft) && (x <= zoomRight) && (y <= zoomBottom) && (y >= zoomTop))   {     inZoomArea = true;   }   return inZoomArea; } //void mouseDragged() //{ //  if (mouseInZoomArea(mouseX, mouseY)) //  { //    int newWidth = width + (mouseX - pmouseX); //    int newHeight = height + (mouseY - pmouseY); //    surface.setSize(newWidth, newHeight); //  } //} void setup() {   size(1300, 720);   surface.setResizable(true);   openSerialPort();   setStartTimeStamp(); } void openSerialPort() {   Serial myPort;  // The serial port   myPort = new Serial(this, "COM3", 9600);   myPort.clear(); // Clear buffer   myPort.bufferUntil(0x0A); // Trigger serialEvent() only after linefeed is read. } void setStartTimeStamp() {   startTime = millis();   timeStringStart = nf(hour(), 2) + ":" + nf(minute(), 2) + ":" + nf(second(), 2);   dateStringStart = year() + "-" + nf(month(), 2) + "-" + nf(day(), 2); } void setTimeStamp() {   currentTime = millis();   timeStringNow = nf(hour(), 2) + ":" + nf(minute(), 2) + ":" + nf(second(), 2);   dateStringNow = year() + "-" + nf(month(), 2) + "-" + nf(day(), 2); } void draw() {   background(0);  // black background   stroke(255);   fill(255);   // Set the location of graph   graphLeft = 50;   graphRight = width - 50;   graphTop = 50;   graphBottom = height - 100;   maxTime = graphRight - graphLeft;   background(0);   setTimeStamp();   plotSelectRange();   plotAxes();   //plotData();   plotData(graphLeft+3, graphRight, graphBottom-3, graphTop);   plotZero(); } void plotData(int leftBorder, int rightBorder, int bottomBorder, int topBorder) {   float x1 = 0;   float y1 = 0;   float x2 = 0;   float y2 = 0;   if (dataNumber < 2) {     return;   }   stroke(255);   // set first point   //x1 = graphLeft+3;   //y1 = map(data[0], minData, maxData, graphBottom-3, graphTop);   x1 = leftBorder;   y1 = map(data[0], minData, maxData, bottomBorder, topBorder);   // plot lines   for (int i=1; i<dataNumber; i++)   {     //x2 = map(i, 0, dataNumber-1, graphLeft+3, graphRight); // auto range     //y2 = map(data[i], minData, maxData, graphBottom-3, graphTop); // auto range     x2 = map(i, 0, dataNumber-1, leftBorder, rightBorder); // auto range     y2 = map(data[i], minData, maxData, bottomBorder, topBorder); // auto range     line(x1, y1, x2, y2);     x1 = x2;     y1 = y2;   } } void plotSelectRange() {   // Set the location of graph   selectRangeLeft = 100;   selectRangeRight = width - 100;   selectRangeBottom = height - 15;   selectRangeTop = height - 48;   int textSize = 12;   textSize(textSize);   stroke(0, 128, 0, 128);   fill(0, 128, 0, 128);   rect(selectRangeLeft, selectRangeTop, selectRangeRight - selectRangeLeft, selectRangeBottom - selectRangeTop);   stroke(255);   fill(255);   textAlign(CENTER);   text(timeStringStart, graphLeft, selectRangeTop + textSize*1);   text(dateStringStart, graphLeft, selectRangeTop + textSize*2.5);   textAlign(CENTER);   text(timeStringNow, graphRight, selectRangeTop + textSize*1);   text(dateStringNow, graphRight, selectRangeTop + textSize*2.5);   plotData(selectRangeLeft, selectRangeRight, selectRangeBottom, selectRangeTop); } void plotAxes() {   int textSize = 12;   float minVoltage = 0;   float maxVoltage = 0;   textAlign(CENTER);   textSize = 24;   textSize(textSize);   text("Air Voltage "+runningNumber, (graphLeft+graphRight)/2, graphTop - textSize);   textSize = 16;   textSize(textSize);   text("Time", (graphRight + graphLeft)/2, graphBottom + textSize * 3);   text("V (mV)", graphLeft, graphTop - textSize);   // plot x-axis   textSize = 12;   textSize(textSize);   stroke(0, 128, 0);   line(graphLeft, graphBottom, graphLeft, graphTop);   textAlign(RIGHT);   minVoltage = map(minData, -1023, 1023, -5000, 5000);   text(round(minVoltage), graphLeft - textSize/2, graphBottom);   maxVoltage = map(maxData, -1023, 1023, -5000, 5000);   text(round(maxVoltage), graphLeft - textSize/2, graphTop + textSize);   textAlign(CENTER);   text(timeStringStart, graphLeft, graphBottom + textSize*1.5);   text(dateStringStart, graphLeft, graphBottom + textSize*2.5);   textAlign(CENTER);   text(timeStringNow, graphRight, graphBottom + textSize*1.5);   text(dateStringNow, graphRight, graphBottom + textSize*2.5);   // plot y-axis   line(graphLeft, graphBottom, graphRight, graphBottom);   textAlign(CENTER);   textSize = 16;   textSize(textSize);   textAlign(CENTER);   text("Time", (graphRight + graphLeft)/2, graphBottom + textSize * 3);   text("V (mV)", graphLeft, graphTop - textSize); } //--- modify by ghosty --- begin void plotZero() {   // ploy x-zero line   int textSize=16;   if (maxData>minData) { //plot only if data is OK     int zero=(minData*graphTop-maxData*graphBottom)/(minData-maxData);     stroke(0, 128, 0);      line(graphLeft, zero, graphRight, zero);     textSize(12);     text("0", graphLeft - textSize/2, zero+textSize/2); //zero   }  } //--- modify by ghosty --- end void serialEvent(Serial whichPort) {   String inString = trim(whichPort.readStringUntil(0x0A)); // Input string from serial port   //println(inString); //debug   if (inString == null)   {      return;   }   //--- modify by ghosty --- begin   String[] list = split(inString, ',');    int voltage = int(trim(list[0]));   int A0 = int(trim(list[1]));   int A1 = int(trim(list[2]));   saveData(voltage, A0, A1);    //--- modify by ghosty --- end   if (isFirstRead == 1)   {     print("Discard first read: ");     println(inString);     isFirstRead = 0;     return;   }   buffer[bufferNumber] = voltage;   bufferTime[bufferNumber] = millis();   if (bufferNumber < bufferLimit-1)   {     bufferNumber++;   } else   {     // bufferNumber == bufferLimit-1     // That means buffer is full     // Compress data:     // keep the max and min     // also keep their order     int xMax = 0;     int yMax = 0;     int xMin = 0;     int yMin = 0;     int i = 0;     String s = null;     yMax = buffer[0];     xMax = 0;     yMin = buffer[0];     xMin = 0;     for (i=1; i<bufferLimit; i++)     {       if (buffer[i] > yMax)       {         yMax = buffer[i];         xMax = i;       }       if (buffer[i] < yMin)       {         yMin = buffer[i];         xMin = i;       }     }     bufferNumber = 0;     if (dataNumber == 0)     {       maxData = yMax;       minData = yMin;     } else {       if (yMax > maxData)       {         maxData = yMax;       }       if (yMin < minData)       {         minData = yMin;       }     }     if (xMin < xMax)     {       data[dataNumber] = yMin;       s = "data[" + dataNumber + "] = " + data[dataNumber] + "  Max: " + maxData + "  Min: " + minData;       println(s);       dataNumber++;       data[dataNumber] = yMax;       s = "data[" + dataNumber + "] = " + data[dataNumber] + "  Max: " + maxData + "  Min: " + minData;       println(s);       dataNumber++;     } else     {       data[dataNumber] = yMax;       s = "data[" + dataNumber + "] = " + data[dataNumber] + "  Max: " + maxData + "  Min: " + minData;       println(s);       dataNumber++;       data[dataNumber] = yMin;       s = "data[" + dataNumber + "] = " + data[dataNumber] + "  Max: " + maxData + "  Min: " + minData;       println(s);       dataNumber++;     }   } } /*    modify by ghosty : save data to file */ import java.io.*; String rootDir="D:\\Earthquake Research\\SampledData\\"; void saveData(int voltage, int A0, int A1) {   BufferedWriter output = null;   try {     String fileName = rootDir+String.format("air%d_%04d-%02d-%02d.txt", runningNumber, year(), month(), day());     output = new BufferedWriter(new FileWriter(fileName, true)); //the true will append the new data     output.write(String.format("%04d-%02d-%02d %02d:%02d:%02d, %5d, %4d, %4d", year(), month(), day(), hour(), minute(), second(),                   voltage, A0, A1));     output.newLine();   }   catch (IOException e) {     println("It Broke");     e.printStackTrace();   }   finally {     if (output != null) {       try {         output.close();       } catch (IOException e) {         println("Error while closing the writer");       }     }   } }