How to achieve a circular crop?

[warm thunder]

shader_type canvas_item;

uniform sampler2D texture;
uniform vec2 texture_size;
uniform vec2 uv_offset;
uniform vec2 uv_scale;

void fragment() {
    vec2 uv = (TEXCOORD0.xy * uv_scale) + uv_offset;
    vec4 color = texture(texture, uv);
    COLOR = color;
}

[novel scarab]

Right on let me try 🙂

[novel scarab]

Where do I get TEXCOORD0 from?

https://i.gyazo.com/c10485961fa46ded08339be752f82cb5.png

[warm thunder]

its the default built in one

does it not work with 0 as well?

mm

[novel scarab]

I'm sorry; could you provide the code? I'm clueless with shaders.

[warm thunder]

uniform sampler2D texture;
uniform vec2 texture_size;
uniform vec2 uv_offset;
uniform vec2 uv_scale;

void fragment() {
    // UV coords offset and scale calc
    vec2 uv = (TEXCOORD0.xy * uv_scale) + uv_offset;
    
    // texture sampling modified UV coordinates
    vec4 color = texture(texture, uv);
    
    // output 
    COLOR = color;
}```

[novel scarab]

I need to be passing in:

uniform vec2 texture_size;
uniform vec2 uv_offset;
uniform vec2 uv_scale;

Somehow right?

[warm thunder]

look at the right side

of the screen

you can set the variable there

its like export variabls

[novel scarab]

Hmm, I'm setting the shader via code:

    var shader_material = ShaderMaterial.new()
    shader_material.shader = load("res://shaders/CircleCropShader.gdshader")
    shader_material.set_shader_parameter('texture', texture)

[warm thunder]

okie

[novel scarab]

Thanks again for the help

[warm thunder]

gotcha ❤️

[novel scarab]

What should I pass in for these?

[warm thunder]

just input some random floats

and work your way to accuracy 😄

texture_size is prolly 1080x1920

[novel scarab]

Can you show me an example? I'm clueless on what to pass, sorry 😦

[warm thunder]

like this:

uniform vec2 texture_size = vec2(1024.0, 1024.0);
uniform vec2 uv_offset = vec2(0.0, 0.0);
uniform vec2 uv_scale = vec2(0.5, 0.5);

as you like to do things by code

[novel scarab]

@warm thunder I actually managed to somehow do it using a parent texturerect and clip only under visability

I can't thank you enough for your help though, you've inspired me to learn shaders 🙂

[warm thunder]

OMG nice!

[novel scarab]

Only took 11 or so hours.

[warm thunder]

lets goooooooooooooooooo