generateSecondaryRulers method
void
generateSecondaryRulers()
The formula is from the below source
(!)https://stackoverflow.com/a/3542512/4565953
Implementation
void generateSecondaryRulers(double totalRulers, Canvas canvas,
Paint secondaryRulersPaint, double height) {
Iterable<List<Offset>> offset = primaryRulers.values;
int i = 0;
for (var element in offset) {
if (i != offset.length - 1) {
Offset a = element[0];
Offset b = offset.elementAt(i + 1)[0];
for (int i = 0; i < totalRulers + 1; i++) {
double x = a.dx * (1 - ((i) / (totalRulers + 1))) +
b.dx * (i / (totalRulers + 1));
double y = a.dy * (1 - ((i) / (totalRulers + 1))) +
b.dy * (i / (totalRulers + 1));
if (Offset(x, y) != a) {
canvas.drawLine(
Offset(x, y), Offset(x, 5 + height), secondaryRulersPaint);
}
}
i = i + 1;
}
}
}