Shader Coding: Over the Moon - Part 1

When can you use an if statement in shader programming and when can you not? I thought they where expensive to use.

really like your tutorials! Your explanations are easy to take, and ideas in code are all so brilliant!

Best help to get started with shaders. Thank you so much

void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
// Normalized pixel coordinates (from 0 to 1)
vec2 uv = (fragCoord-.5*iResolution.xy)/iResolution.y;


vec3 col =vec3(0);


float thickness = 1./iResolution.y;

if(abs(uv.x)<thickness) col.g = 1.;
if(abs(uv.y)<thickness) col.r = 1.;


// Output to screen
fragColor = vec4(col,1.0);
}

Happy to have found this channel, you explain everything and is really quick on debugging issues on the fly. Thanks for the video and the lesson.

How driwing Line without IF??

Thanks! I learn a lot from every video, little useful tricks, like animating the uv.x with time to have a scrolling effect, or joining sin waves to create cool semi-random ground effect! Awesome work, really appreciate it!

Thank you for your sharing! Looking forward to buy your books!

Thank you for this, man. A joy to watch! Very inspiring

Thanks a lot for this, learned a lot :D

a doubt, what programming language is it?

This is just too good. Loving it... the outcome, the process, the explanation.

Most times I really battle to think in the shader mindset, ironically I write shaders almost daily lol. You are truly an inspiration! Thank you for imparting your knowledge as always, you have helped so many people immensely.

I saw your piece long time ago but had no idea what happened then. Glad I found you now.

Amazing graphics!! It is enough to follow your 4 video 'shader toy for beginner" to be able to do this or is it at a more advanced level?)

I play piano, and I loved the Music so much.

wow! great work and thanks for sharing. It's really helpful to see the way of thinking behind the code, looking forward to next episodes

Thanks, Man! Your videos, as always, are amazing! I made shadows soft and curved with some little tweak :)

Thanks for this! Shader coding is the hardest for me.

Yes, finally

What are the practical applications of this?

How does the performance of doing this compare to creating textures and blitting them?

Oh, man, I think You should write a book, that 'll be amazing...

Very cool, thanks for u, this a lot of help me in my of shaders tuition, I like this and need more.

Mad! We were waiting for the Musk's car but this is even more interesting for me.

this is amazing and very useful

raytraced graphics are overrated! canopy graphics are much cooler.

Thanks for sharing your knowledge! I will try to export it to WebGL 1.0 and TypeScript.

Is there an advantage of fract over mod?

So glad you show the errors, and the finding of the solutions.
Watching the method to fix stuff is in many ways more illuminating than seeing it right first time.

Best notification

Thx for sharing!
./ivar

Really cool as Always ! Continue !

Can't get enough of you videos, you really know how to explain stuff. Keep up the great work!

Absolutely amazing

thanks great tutorial.

super !

magician!

Awesome as always !

very nice effect. congratulations on your work