Disturbance effect
屏幕扰动效果，类似火焰灼烧空气
需要一张贴图
speed表示扰动的速度
size表示扰动的强度
Shader code
shader_type canvas_item;
uniform sampler2D smoke;
uniform float speed = 0.3;
uniform float size = 0.08;
void fragment(){
vec2 smoke_uv = UV + TIME * speed;
vec4 smoke_color = texture(smoke, fract(smoke_uv));
smoke_color = clamp(smoke_color * size, 0.0, 1.0);
vec4 img_color = texture(SCREEN_TEXTURE, SCREEN_UV + vec2(smoke_color.g - size/2.0,0.0));
COLOR = vec4(img_color);
}Live Preview
感谢
I’m not sure what I’m doing wrong, but the sprite just becomes invisible
kinda works like this:
shader_type canvas_item; uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmap; uniform sampler2D distortion_pattern; uniform float intensity = 0.08; uniform float speed = 0.3; void fragment() { vec2 moving_uv = UV + vec2(TIME * speed, TIME * speed); vec2 distortion = texture(distortion_pattern, fract(moving_uv * 0.1)).rg; // Scale the UVs to control the frequency of the distortion vec2 distorted_uv = UV + (distortion * 2.0 - 1.0) * intensity; distorted_uv = clamp(distorted_uv, vec2(0.0, 0.0), vec2(1.0, 1.0)); vec4 color = texture(TEXTURE, distorted_uv); COLOR = color; }Great shader, thank you for fixing it
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