Simple Clipping with Adjustable Softedge

A simple shader for clipping from up/down/left/right with soft edge.

Useful (maybe) in making UI animations.

Shader code
shader_type canvas_item;
//@A shader by 刚学没几天的小策划@SL
uniform float power : hint_range(0.2, 4.0, 0.1) = 1.0;
uniform float up : hint_range(0.0, 1.0, 0.001) = 0.1;
uniform float down : hint_range(0.0, 1.0, 0.001) = 0.1;
uniform float left : hint_range(0.0, 1.0, 0.001) = 0.1;
uniform float right : hint_range(0.0, 1.0, 0.001) = 0.1;
uniform float up_clip : hint_range(0.0, 1.0, 0.001) = 0.0;
uniform float down_clip : hint_range(0.0, 1.0, 0.001) = 0.0;
uniform float left_clip : hint_range(0.0, 1.0, 0.001) = 0.0;
uniform float right_clip : hint_range(0.0, 1.0, 0.001) = 0.0;
//uniform float angel : hint_range(0.0, 90.0, 0.1) = 0.0;

void fragment() {
	vec2 _rotated_uv = UV;
	//TODO: Add an "angel" parameter to change the clipping direction
	
	float _hor = 1.0;
	if (_rotated_uv.x<left) {
		if (left_clip 0.0) {
			if (_rotated_uv.x1.0-right) {
		if (right_clip 0.0) {
			if (1.0-_rotated_uv.x < right_clip){_hor = 0.0;}
			else {_hor *= pow( (1.0-_rotated_uv.x-right_clip)/(right-right_clip), power);}
		}
		else{
			_hor *= pow( (1.0-_rotated_uv.x)/right, power);
		}
	}
	
	float _ver = 1.0;
	if (_rotated_uv.y<up) {
		if (up_clip 0.0) {
			if (_rotated_uv.y1.0-down) {
		if (right_clip 0.0) {
			if (1.0-_rotated_uv.y < down_clip){_ver = 0.0;}
			else {_ver= pow( (1.0-_rotated_uv.y-down_clip)/(down-down_clip), power);}
		}
		else{
			_ver *= pow( (1.0-_rotated_uv.y)/down, power);
		}
	}
	
	COLOR = texture(TEXTURE,UV);
	COLOR.a = min(_hor*_ver, texture(TEXTURE,UV).a);
}
Tags
2d, Clipping, godot4, Softedge
The shader code and all code snippets in this post are under CC0 license and can be used freely without the author's permission. Images and videos, and assets depicted in those, do not fall under this license. For more info, see our License terms.

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boki
boki
2 months ago

哈哈哈我好像看到过这个shader,好像是在b站里面还是在一个群里面看到过