private int CalculateAlpha(TouchObject tobject)
{
var aliveMillis = tobject.AliveMillis;
var alpha = 255 * CalculateRatio(aliveMillis, ANIMATION_MILLISECONDS);
return((int)alpha);
}
private int CalculateTextSize(TouchObject tobject)
{
var aliveMillis = tobject.AliveMillis;
var baseTextScale = TEXT_SCALE_MIN;
var variableTextScale = TEXT_SCALE_MAX - TEXT_SCALE_MIN;
var textSize = baseTextScale + (variableTextScale * CalculateRatio(aliveMillis, ANIMATION_MILLISECONDS));
return((int)textSize);
}
private float CalculateRatio(TouchObject tobject, int animationMillis)
{
var aliveMillis = tobject.AliveMillis;
if (aliveMillis > ANIMATION_MILLISECONDS)
{
return(0);
}
else
{
var ratio = 1 - (aliveMillis / (float)ANIMATION_MILLISECONDS);
return(ratio);
}
}
private void AdjustTextPaint(TouchObject tobject, Paint textPaint)
{
textPaint.Alpha = CalculateAlpha(tobject);
textPaint.TextSize = CalculateTextSize(tobject);
}