Often these fragments
are inside loops.
Overall code organization:
lineMethod( )
{
// 1. general set up
// 2. special case set up
while (notdone) {
// 3. inner loop
}
}
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- remove unnecessary method invocations
replace Math.round(m*x0 + b)
with (int)(m*x0 + b + 0.5)
Does this always work?
- use incremental calculations
Consider the expression
The value of y is known at x0 (i.e. it is y0 + 0.5)
Future values of y can be expressed in terms of previous values with a
difference equation:
yi+1 = yi + m;
or
yi+1 = yi - m;
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