import java.awt.*; //import javax.swing.*; // Module 1 Exercise 3 public class Mod3Plot extends Panel { Mod3State state; int[] xList, yList; int[] yList2, yList3, yList4; int[] xList2; int yMin, yMax, xMin, xMax, yMid; int yBorder, yOffset; //private static final Color bgColor = Color.gray; private static final Color bgColor = new Color(236,236,236); static int degreesPerX = 5; static int ncycles = 3; static int npts = ncycles*(360/degreesPerX); static double piOver4 = Math.PI/4; double deltaY, deltaX; FontMetrics fm; int fontHeight,ticLength; //static Font boldFont = new Font("Serif",Font.BOLD, 18); public Mod3Plot(Mod3State state) { super(); this.state = state; } public void initialPlot() { setBackground(bgColor); getPoints(); deltaY = (yMax - yMin)/10.0; deltaX = (xMax - xMin)/6.0; // Get font sizes: //setFont(boldFont); setFont(TheFonts.sanSerif12); fm = getFontMetrics(getFont()); fontHeight = fm.getHeight(); ticLength = fm.stringWidth("w"); // just a wide letter. xList2 = new int[xList.length]; for (int i = 0; i < xList.length; i++) xList2[i] = xList[i]+1; repaint(); } private void getPoints() { double xPoint, yPoint, xInRadians; xList = new int[npts]; yList = new int[npts]; yList2 = new int[npts]; yList3 = new int[npts]; yList4 = new int[npts]; // create a wave with y in (-100,100), x in (0,600) for (int i = 0; i < xList.length; i++) { xPoint = ((double)i*degreesPerX)/180; xList[i] = (int) (xPoint*state.s100); // scale x so 360 degress spans 200 // each x point == 'degreesPerX' degrees; 180 degrees = pi(radians) xInRadians = xPoint * 3.1415927; yPoint = Math.cos(xInRadians); //yList[i] = (int) (yPoint*100); // scale y from -100 to 100 yList[i] = (int) (yPoint*state.s150); // scale y from -100 to 100 yPoint = Math.cos(xInRadians+piOver4); //yList2[i] = (int) (yPoint*100); // scale y from -100 to 100 yList2[i] = (int) (yPoint*state.s150); // scale y from -100 to 100 yPoint = Math.sin(xInRadians); //yList3[i] = (int) (yPoint*100); // scale y from -100 to 100 yList3[i] = (int) (yPoint*state.s150); // scale y from -100 to 100 yPoint = -1.0 * Math.cos(xInRadians-piOver4); //yList4[i] = (int) (yPoint*100); // scale y from -100 to 100 yList4[i] = (int) (yPoint*state.s150); // scale y from -100 to 100 } // where to draw on the screen: yOffset = state.s15; //yBorder = 15; yBorder = state.s5; //xMin = 35; xMax = (200 * ncycles) + xMin; xMin = state.s85; xMax = (state.s200 * ncycles) + xMin; yMin = yBorder+yOffset; //yMax = 200+yBorder+yOffset; yMax = state.s300+yBorder+yOffset; yMid = (int)(0.5*(yMax+yMin)); // NOW push the sine wave DOWN on the Y-axis, so that the sine // wave appears in the middle of the screen, rather that at the TOP for (int i = 0; i < yList.length; i++) { yList[i] += yMid; yList2[i] += yMid; yList3[i] += yMid; yList4[i] += yMid; } flipCoordinates(yList,yMid); flipCoordinates(yList2,yMid); flipCoordinates(yList3,yMid); flipCoordinates(yList4,yMid); // NOW shift the X-axis over by xMin to make room for the vertical // axis line. for (int i = 0; i < xList.length; i++) xList[i] += xMin; } private void flipCoordinates(int[] coords, int flipAround) { int delta; for (int i = 0; i < coords.length; i++) { delta = coords[i] - flipAround; coords[i] = flipAround - delta; } } public void paint(Graphics g) { Graphics2D g2d = (Graphics2D)g; g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); // Draw x and y axis: drawAxis(g); // Draw axis tick marks: drawAxisTicks(g); // calculate the sine points first: // by getting bounds, and scaling x to get about 5 up-and-down // curves //.... g2d.setStroke(new BasicStroke(3,BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND)); g.setColor(state.yListColor); g.drawPolyline(xList,yList,yList.length); g.drawPolyline(xList2,yList,xList2.length); if (yList2 != null) { g.setColor(state.yList2Color); g.drawPolyline(xList,yList2,yList2.length); g.drawPolyline(xList2,yList2,xList2.length); } if (yList3 != null) { g.setColor(state.yList3Color); g.drawPolyline(xList,yList3,yList3.length); g.drawPolyline(xList2,yList3,xList2.length); } if (yList4 != null) { g.setColor(state.yList4Color); g.drawPolyline(xList,yList4,yList4.length); g.drawPolyline(xList2,yList4,xList2.length); } g2d.setStroke(new BasicStroke(1)); } private void drawAxis(Graphics g) { Graphics2D g2d = (Graphics2D)g; g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); // Draw x and y axis: g.setColor(state.axisColor); g2d.setStroke(new BasicStroke(state.s0,BasicStroke.CAP_BUTT, BasicStroke.JOIN_ROUND)); drawLine(g,xMin,yOffset,xMin,yMax+yBorder); // the y-axis drawLine(g,xMin,yMid,xMax+yBorder-state.s3,yMid); // the x-axis g2d.setStroke(new BasicStroke(state.s0,BasicStroke.CAP_BUTT, BasicStroke.JOIN_ROUND)); MyArrows.drawDblUpArrow(g,xMin,yOffset-state.s7,state.sfactor); MyArrows.drawDblDownArrow(g,xMin,yMax+yBorder+state.s7,state.sfactor); MyArrows.drawDblRightArrow(g,xMax+yBorder,yMid,state.sfactor); } private void drawLine(Graphics g, int x1, int y1, int x2, int y2) { if (y1 != y2) { g.drawLine(x1,y1,x2,y2); //g.drawLine(x1+1,y1,x2+1,y2); } else { g.drawLine(x1,y1,x2,y2); //g.drawLine(x1,y1+1,x2,y2+1); } } private void drawAxisTicks(Graphics g) { Graphics2D g2d = (Graphics2D)g; g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.setStroke(new BasicStroke(state.s0,BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND)); // Draw x and y axis: g.setColor(state.axisColor); g.setFont(new Font("SanSerif",Font.BOLD,state.font14)); FontMetrics fm; fm = g.getFontMetrics(); for(int i=0;i<11;i++){ int y = (int)(i*deltaY)+yOffset+yBorder; g.drawLine(xMin-ticLength,y,xMin,y); int v = 5-i; if (v == 5 || v == -5) { String vs = String.valueOf(v); g.drawString(vs,xMin-ticLength-fm.stringWidth(vs)-5, y+(int)(0.5*fontHeight)); } } //g.drawString("[Volts]",xMin+ticLength,(int)(1.5*fontHeight)+yOffset-10); g.drawString("[Volts]",xMin+ticLength,(int)(1.5*fontHeight)+yOffset-state.s18); // On the x-axis: // dots per cm: int screenRes = (int) (getToolkit().getScreenResolution()/2.54); for(int i=1;i<50;i++){ int x = (int)(i*screenRes) +xMin; if( x > xMax) break; g.drawLine(x,yMid+ticLength,x,yMid); String xs = String.valueOf(i); g.drawString(xs,x-(int)(0.5*fm.stringWidth(xs)), yMid+ticLength+fontHeight); } //g.drawString("t[sec]",xMax+yBorder-fm.stringWidth("t[sec]"),yMid+fontHeight+5); g.drawString("t [sec]",xMax-fm.stringWidth("t[sec]")+state.s15,yMid-state.s10); } }