CODEWITHSUNDEEP
androidopengl-escolors
Vadim
Vadim

Reputation: 36

Dynamically change color on Android using openGL?

How gradually change the color of the some shape with the time on Android using openGl? For example, I want dynamically change the color of the triangle.

Upvotes: 1

Views: 417

Answers (1)

Konstantin Selyuk
Konstantin Selyuk

Reputation: 207

I think, you mean something like this:

Measure time and get only remainder of the division on concrete module, in my example, I use module = 10000 = 10 seconds, so each 10 seconds the set of colors will be repeated

int module = 10000;
long time = SystemClock.uptimeMillis() % module;

And, then you can use this value, as you want - I create the next scenario, but you can modify it for obtaining the best result:

int shift = module/5;
Color c = new Color();
int red = (int)((float)time/module)*256, 
    green =(int)(((float)time+shift)/module)*256, 
    blue = (int)(((float)time+2*shift)/module)*256; 
c.rgb(red, green, blue);

if you would find better way, please inform me!

Upvotes: 1

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