23 lines
639 B
Plaintext
23 lines
639 B
Plaintext
shader_type canvas_item;
|
|
|
|
uniform float glow_interval : hint_range(0.0, 1.0, 0.00001) = 1.0;
|
|
uniform float glow_radius : hint_range(0.0, 1.0, 0.00001) = 1.0;
|
|
uniform float travel_time : hint_range(0.0, 100.0, 1) = 5.0;
|
|
|
|
float get_alpha(vec2 uv, float offset) {
|
|
float dist = fract(mod(TIME, travel_time)/travel_time + offset);
|
|
float left = uv.x - glow_radius;
|
|
float right = uv.x + glow_radius;
|
|
return step(left, dist) * (1.0 - step(right, dist));
|
|
}
|
|
|
|
void fragment() {
|
|
float alpha = 0.0;
|
|
float offset = 0.0;
|
|
for (float offset = 0.0; offset <= 1.0; offset += glow_interval) {
|
|
alpha += get_alpha(UV, offset);
|
|
}
|
|
|
|
COLOR.a = alpha;
|
|
}
|