public double getMaxValue(int pixelResolution) {
Rectangle field = new Rectangle(pixelResolution, pixelResolution);
double[] drawingPoint = plotSheet.toCoordinatePoint(field.x, 0, field);
double max = Double.NEGATIVE_INFINITY;
for (int i = 0; i < pixelResolution; i++) {
drawingPoint = plotSheet.toCoordinatePoint(i, 0, field);
double f_x = function.f(drawingPoint[0]);
if (f_x > max) max = f_x;
}
return max;
}
/* (non-Javadoc)
* @see rendering.Drawable#paint(java.awt.Graphics)
*/
@Override
public void paint(Graphics g) {
if (function instanceof StepFunction2D) {
this.isStepFunction = true;
}
Graphics2D g2D = (Graphics2D) g;
Stroke oldStroke = g2D.getStroke();
g2D.setStroke(new BasicStroke(this.size)); // set stroke width of 10
Color oldColor = g.getColor();
Rectangle field = g.getClipBounds();
g.setColor(color);
if (autoscale) {
double[] start = this.plotSheet.toCoordinatePoint(0, 0, field);
double[] end =
this.plotSheet.toCoordinatePoint(0, 0 + this.plotSheet.getFrameThickness(), field);
this.scaleFactor = Math.abs(end[1] - start[1]);
// this.scaleFactor *= binSize;
} else {
this.scaleFactor = 1.0;
}
if (this.isOnFrame) yOffset = plotSheet.getyRange()[0];
double[] drawingPoint = plotSheet.toCoordinatePoint(field.x, 0, field);
if (this.isOnFrame)
drawingPoint =
plotSheet.toCoordinatePoint(field.x + this.plotSheet.getFrameThickness(), 0, field);
double f_x = function.f(drawingPoint[0]) * scaleFactor * extraScaleFactor;
double f_x_old = f_x;
int[] coordStart = plotSheet.toGraphicPoint(drawingPoint[0], f_x, field);
if (this.isOnFrame)
coordStart = plotSheet.toGraphicPoint(drawingPoint[0], this.yOffset - f_x, field);
int[] coordEnd = coordStart;
int leftStart = field.x + 1;
int rightEnd = field.width + field.x;
if (this.isOnFrame) {
leftStart = field.x + this.plotSheet.getFrameThickness() + 1;
rightEnd = field.width + field.x - this.plotSheet.getFrameThickness();
}
if (this.hasLimit) {
leftStart = plotSheet.xToGraphic(leftLimit, field);
rightEnd = plotSheet.xToGraphic(rightLimit, field);
}
for (int i = leftStart; i < rightEnd; i++) {
drawingPoint = plotSheet.toCoordinatePoint(i, 0, field);
coordEnd = coordStart;
f_x_old = f_x;
f_x = function.f(drawingPoint[0]) * scaleFactor * extraScaleFactor;
coordStart = plotSheet.toGraphicPoint(drawingPoint[0], f_x, field);
if (this.isOnFrame)
coordStart = plotSheet.toGraphicPoint(drawingPoint[0], this.yOffset - f_x, field);
double overlap = 0.2 * (plotSheet.getyRange()[1] - plotSheet.getyRange()[0]);
if (f_x_old != Double.NaN
&& f_x != Double.NaN
&& f_x_old != Double.NEGATIVE_INFINITY
&& f_x != Double.NEGATIVE_INFINITY
&& f_x_old != Double.POSITIVE_INFINITY
&& f_x != Double.POSITIVE_INFINITY
&& f_x_old <= plotSheet.getyRange()[1] + overlap
&& f_x_old >= plotSheet.getyRange()[0] - overlap
&& f_x <= plotSheet.getyRange()[1] + overlap
&& f_x >= plotSheet.getyRange()[0] - overlap) {
if (!this.isStepFunction) {
g.drawLine(coordStart[0], coordStart[1], coordEnd[0], coordEnd[1]);
} else {
g.drawLine(coordStart[0], coordStart[1], coordStart[0], coordEnd[1]);
}
} else if (!warned) {
System.err.println("Could not draw part of function, possible pole or out of reach");
warned = true;
}
}
g2D.setStroke(oldStroke);
g.setColor(oldColor);
}