GLSL pow function?

Question

I have this:

    float xExponential = pow(xPingPong, 5);

And is not working, claiming:

ERROR: 0:53: No matching overload for call to function 'pow'

Am I doin' something wrong? Developing for iOS with OpenGL ES 2.0.

Bandicoot

Answer 1

Can you try this ?

float xExponential = pow(xPingPong, 5.0);

Convincing

Reason is that 5 is a integer and 5.0 is a float (and the pow function is not defined for pow(float,int). There is no automatically typecast in GLSL, but you could force the correct type by float xExponential = pow(xPingPong, float(5)); - not that it makes sense in this example. – Worley

@Geri It's considered polite to accept an answer if it helped you solve your problem. Hit the checkmark beside Mennan's answer if it helped you. – Subjugate

Answer 2

Your code is fine just syntax error

Write upto decimal digit

 float xExponential = pow(xPingPong, 5.0);

or

 float xExponential = pow(xPingPong, 5.);

Genotype

the answer has already been given – Elevation

Answer 3

Although accurate answers are provided, it is good to explain why those answers work.

float xExponential = pow(xPingPong, 5.0);

GLSL is strongly typed. 1, 2, 3, etc. are considered int. GLSL pow function expects a float value. Thus, you need to convert your power to float. 1., 1.0, 1.f, 1.0f, etc. are treated as float values.

Hope this helps.

Abstraction

This does not provide an answer to the question. Once you have sufficient reputation you will be able to comment on any post; instead, provide answers that don't require clarification from the asker. - From Review – Longsufferance