toString method
A string representation of this object.
Some classes have a default textual representation,
often paired with a static parse function (like int.parse).
These classes will provide the textual representation as
their string representation.
Other classes have no meaningful textual representation
that a program will care about.
Such classes will typically override toString to provide
useful information when inspecting the object,
mainly for debugging or logging.
Implementation
@override
String toString() {
return 'Particle{alpha: $alpha, color: $color, cx: $cx, cy: $cy, radius: $radius, baseCx: $baseCx, baseCy: $baseCy, baseRadius: $baseRadius, top: $top, bottom: $bottom, mag: $mag, neg: $neg, life: $life, overflow: $overflow}';
}