Android live wallpaper farmula

Question

in live wallpaper we have method called onOffsetsChanged which is called when user swipes on the screen of this phone the value of xOffset is changed from 0.1 to 0.9

now i want to make is this way that when the value falls less then 0.5

it might return different value

for example

0.5 --> 0.48

0.4 --> 0.46

0.3 --> 0.44

0.2 --> 0.42

0.1 --> 0.40

but when it increases from 0.5 it stays the same

0.9 --> 0.9

0.8 --> 0.8

0.7 --> 0.7

0.6 --> 0.6

can some one help me with this formula i am not able to get any logic here

@Override
public void onOffsetsChanged(final float xOffset, final float yOffset, final float xOffsetStep, final float yOffsetStep, final int xPixelOffset, final int yPixelOffset) 
{
    super.onOffsetsChanged(xOffset, yOffset, xOffsetStep, yOffsetStep, xPixelOffset, yPixelOffset);
    Runnable offsetsChangedCommand = new Runnable() 
    {
        public void run() {
            if (xOffsetStep != 0f) 
            {
                glRenderer.setParallax(xOffset - 0.5f);
            }
        };
    };
    executor.execute(offsetsChangedCommand);
}

score 2 · Accepted Answer · answered Apr 13 '12 at 19:44

2

There may be a better way, but the easiest thing I can think of is to do:

float actualOffset;
if(xOffset>0.5f)
{
    actualOffset=xOffset;
}
else
{
    actualOffset=0.38f+(xOffset*0.2f);
}

glRenderer.setParallax(actualOffset- 0.5f);

answered Apr 13 '12 at 19:44

Kendrick

3,747
1
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I don't think you meant to declare actualOffset as int – Joshua Carmody Apr 13 '12 at 19:45
@Joshua Carmody That would be the third error in my code. Apparently it's time to call it a day. – Kendrick Apr 13 '12 at 19:47
Understandable, it's Friday. :-) Otherwise, your code works, and is more or less the same solution I came up with, posted slightly sooner. So, +1. – Joshua Carmody Apr 13 '12 at 19:50

score 1 · Answer 2 · answered Apr 13 '12 at 19:44

1

float myXOffset;
if(xOffset <= 0.5) 
{
    myXOffset = 0.38 + (xOffset / 5);
} else {
    myXOffset = xOffset;
}

answered Apr 13 '12 at 19:44

Joshua Carmody

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Android live wallpaper farmula

2 Answers2