Written version of this tutorial: waelyasmina.net/articles/glsl-and-shaders-tutorial-for-beginners-webgl-threejs/ A few mistakes I made in the video: 05:58 there's a missing dot. wrong: float f = matB[0]y; correct: float f = matB[0].y; 08:12 wrong function return. wrong: return vec2(1.0, 2.0); correct: return vec2(x, y); 10:38 we can't set precision to vectors and matrices. wrong: precision highp vec2; correct: precision highp int; correct: precision highp sampler2D;
I've struggling to learn GLSL for some years by now. Your tutorial was the best I've seen in this time. Very concise and didactic. Not only that, it really inspired me to take another chance. Thank you so much for this, dude. Excellent work!
Honestly,this was a very simple and easy to understand tutorial. It really helped me and good video. I wanted to code shaders on glsl but I didn't understand it properly now because of the tutorial I have no confusions
You're welcome! Yes there's a shortage in terms of GLSL tutorials but I'll try to make more whenever I learn or come up with something worth making a tutorial on.
this is very useful, thank you! i watched the whole thing with only some vague knowledge of c and c# but your teaching style made it pretty easy to digest :)
@4:44 What are the components for vect.w, vect.a, and vect.q? You explained the other components for position, Color and Textures, but not for above. TIA
Thank you so much for this awesome tutorial😍 One problem: when there are different aspect ratio for the mesh and the image.. that image texture got squeezed/stretched. Do you know any solution of that?
Wael do you have courses at udemy or any othre platform?? because u should... i want to support you!! Also for anyone trying, on 17:19 substitute like this for a cool example vec3 newPosition = vec3(position.x, position.y, newZ)
Thanks for making shaders a let harrowing concept :) At 24:10, how come the vec4 know that float effect is v3? I mean we are only putting a sin function in float effect, so isnt it a single value?
effect is actually a single float value since abs(sin(texture.x + u_time)) returns a single float value. You know sin() returns a value between -1 and 1. vec3(effect) is the same as vec3(effect, effect, effect).
@@WaelYasmina why I was worried is in oneof the shader videos I saw, the uploader got an error in console that was something like, 3 arguments expected 2 supplied. Something like this.
Very Good Tutorial, you help me understand that vertex shader will execute the same times of the count of the vertices.That is very important.So, how much times will the fragment shader execute? Does it depends on the resolution of the canvas?
Thank you! Generally speaking 1 fragment = 1 pixel. Thus the fragment shader is executed the number of pixels times. Sometimes 1 pixel > 1 fragment. Thus the fragment shader is executed more times than the number of pixels. To understand the logic behind the 2nd case check these out: stackoverflow.com/questions/68426777/how-many-times-does-the-glsl-fragment-shader-execute-for-one-draw (The answer) ua-cam.com/video/uH1ES8LOrlM/v-deo.html
Thank you Oliver! You mean the examples? I think it's possible to replicate the 1st example without using GLSL. However when it comes to the color gradient and masking I don't think it is possible as far as I know. Anyways even though we have the ability to create cool things without GLSL & shaders they still a must learn if you want to create some high level stuff.
Okay, I know MUCH MUCH more than I did... But.. I am still lost.. I just seem to have some mental block when it comes to the GL shader stuff.. I might be able to understand it more if there was a "copy/paste GL stuff" and be able to see what the equivalent code would be in JS.. Though, if half of the stuff is doing what I think it's doing, that may not help.
Written version of this tutorial: waelyasmina.net/articles/glsl-and-shaders-tutorial-for-beginners-webgl-threejs/
A few mistakes I made in the video:
05:58 there's a missing dot.
wrong: float f = matB[0]y;
correct: float f = matB[0].y;
08:12 wrong function return.
wrong: return vec2(1.0, 2.0);
correct: return vec2(x, y);
10:38 we can't set precision to vectors and matrices.
wrong: precision highp vec2;
correct: precision highp int;
correct: precision highp sampler2D;
thank you so much ❤
I've struggling to learn GLSL for some years by now.
Your tutorial was the best I've seen in this time.
Very concise and didactic.
Not only that, it really inspired me to take another chance.
Thank you so much for this, dude.
Excellent work!
I'm so thankful for these kind words, thank you Doug I really appreciate it!
me too
you are a great instructor! I am a mechanical engineer with limited js knowledge and your videos helped me build a fun website thank you so much!
Honestly,this was a very simple and easy to understand tutorial. It really helped me and good video. I wanted to code shaders on glsl but I didn't understand it properly now because of the tutorial I have no confusions
Man this tutorial was the best one ever! You have done a tremendous job! 👍
Thank you so much for this video! Have been looking for something like this for weeks, there is surprisingly little content about GLSL on youtube.
You're welcome!
Yes there's a shortage in terms of GLSL tutorials but I'll try to make more whenever I learn or come up with something worth making a tutorial on.
great tutorial, I'm stuck with glsl for weeks. This video is really helpful
Dude, I had this wet dream of me drawing tasty animations with shaders and this video got me to a “good enough” level in 20minutes! Thank you!
Omg.. the most outstanding explanation ever.. been trying to understand shader from other video but this top it all.. tq very much sir
this is very useful, thank you!
i watched the whole thing with only some vague knowledge of c and c# but your teaching style made it pretty easy to digest :)
Great to hear!
your voice is better than anyone who does shader videos...no hate to others but this did not give me a headache listening to
Such a weird backhanded compliment
@4:44 What are the components for vect.w, vect.a, and vect.q?
You explained the other components for position, Color and Textures, but not for above. TIA
Thank you Wael, very concise and organized presentation!
Glad you think so!
I love this tutorial! It's so clear and informative.
Nice work, very lucid. The depth and breadth is just right.
Thanks a lot for this tutorial. Cleared a lot of confusions I had with glsl.
Thank you so much for this video - exactly what I was looking for!
Good tutorial, gave me all the info I need 👍
Glad it helped!
Thanks for the clear explaination!
What an awesome video. Keep going!
Thank you! Will do!
Thanks , That tutorial very clear and prefect.
My pleasure!
great tutorial, thank you!
You're welcome!
Great job!
Thank you so much for this awesome tutorial😍 One problem: when there are different aspect ratio for the mesh and the image.. that image texture got squeezed/stretched. Do you know any solution of that?
Finally a good tutorial
Glad you think so!
Thank you! Helped a ton
Wael do you have courses at udemy or any othre platform?? because u should... i want to support you!! Also for anyone trying, on 17:19 substitute like this for a cool example vec3 newPosition = vec3(position.x, position.y, newZ)
you are a gem.....
PLEASE PLEASE PLEASE DO A FULL COURSEE ON THISS ONEEE
Great video!
Really excellent - thank you
You're welcome!
Thanks for making shaders a let harrowing concept :)
At 24:10, how come the vec4 know that float effect is v3? I mean we are only putting a sin function in float effect, so isnt it a single value?
effect is actually a single float value since abs(sin(texture.x + u_time)) returns a single float value. You know sin() returns a value between -1 and 1.
vec3(effect) is the same as vec3(effect, effect, effect).
@@WaelYasmina yea I do a lot of p5 animations and sin cos is totally fine with me bro. Thank you very much, again :D
@@WaelYasmina why I was worried is in oneof the shader videos I saw, the uploader got an error in console that was something like, 3 arguments expected 2 supplied.
Something like this.
All love brother
thankyou for the tutorial!
You're welcome!
Very Good Tutorial, you help me understand that vertex shader will execute the same times of the count of the vertices.That is very important.So, how much times will the fragment shader execute? Does it depends on the resolution of the canvas?
Thank you!
Generally speaking 1 fragment = 1 pixel. Thus the fragment shader is executed the number of pixels times.
Sometimes 1 pixel > 1 fragment. Thus the fragment shader is executed more times than the number of pixels.
To understand the logic behind the 2nd case check these out:
stackoverflow.com/questions/68426777/how-many-times-does-the-glsl-fragment-shader-execute-for-one-draw (The answer)
ua-cam.com/video/uH1ES8LOrlM/v-deo.html
You have an amazing font in this video, source may be appreciated
Itim
@@WaelYasmina thanks
Excellent content Wael! Quick question about usage of GLSL: couldn't we simply use Three to do most of what you've created in this video ? Thanks
Thank you Oliver!
You mean the examples? I think it's possible to replicate the 1st example without using GLSL. However when it comes to the color gradient and masking I don't think it is possible as far as I know.
Anyways even though we have the ability to create cool things without GLSL & shaders they still a must learn if you want to create some high level stuff.
thanks , so good video
maybe, this lession is WebGL (vertex and shader...)?
Indeed
@@WaelYasmina respect you,
Okay, I know MUCH MUCH more than I did...
But.. I am still lost..
I just seem to have some mental block when it comes to the GL shader stuff..
I might be able to understand it more if there was a "copy/paste GL stuff" and be able to see what the equivalent code would be in JS.. Though, if half of the stuff is doing what I think it's doing, that may not help.
You da champ!
Example 1 shows the power of math in 4 lines of code.
Sad that i can give only one thumb´s up
But your sweet comment is worth dozens of them. Thank you Niklas!
Thank you
//good vid
I'm probably the best learner here lol
Nice! 💪
OH MY GOD!
🤩
You need to be protected at all costs. 😁
Thank you lol
Lmao 🤣
NOT restricted AT ALL to javascript... glsl is online or offline, has nothing to do with Javascript really.. it's its own language...
Did I say something other than that?
@WaelYasmina No, don't listen to that fool lol
I feel like I need autism to understand this material.
this is hard
Man, the tutorial is just amazing, but my IQ is jut too low... :D