Pulso de scanner

#version 300 es// World-space scan → Scanner pulse, web GLSL (GLSL ES 3.00). From Creative Center, MIT license.precision highp float;uniform float u_time;uniform vec2 u_resolution; // this pass's output size in pixelsuniform float p_period; // Seconds per pulse: 2.5 (0.5 to 6.0)uniform float p_range; // Range: 2.8 (1.0 to 6.0)uniform float p_decay; // Trail length: 0.35 (0.05 to 2.0)uniform float p_spacing; // Grid spacing: 0.3 (0.05 to 1.0)uniform vec3 p_color; // Color: vec3(0.3, 0.85, 1.0), sRGB; upload it decoded to linearuniform float p_intensity; // Intensity: 1.5 (0.0 to 4.0)in vec2 v_uv;in vec3 v_position;in vec3 v_normal;in vec3 v_view;out vec4 fragColor;struct Inputs {	vec2 uv;	vec3 position;	vec3 normal;	vec3 view;	float time;	vec2 fragCoord;	vec2 resolution;};vec3 u_toSrgb(vec3 c) {	return mix(c * 12.92, 1.055 * pow(c, vec3(1.0 / 2.4)) - 0.055, step(0.0031308, c));}// The scanner sits just under the test sphere, as if on the ground below it. In a game this is a uniform the script// sets to the scanner's world position.const vec3 origin = vec3(0.0, -1.2, 0.0);// 1 on the world planes where a coordinate is a whole multiple of the spacing, fading out within 8% of a cellfloat gridLines(vec3 p) {	vec3 offset = abs(fract(p / p_spacing + 0.5) - 0.5);	vec3 line = 1.0 - smoothstep(vec3(0.0), vec3(0.08), offset);	return max(line.x, max(line.y, line.z));}vec4 effect(Inputs i) {	float radius = fract(i.time / p_period) * p_range;	float dist = distance(i.position, origin);	// Positive where the pulse has already passed, negative ahead of it	float behind = radius - dist;	float front = smoothstep(-0.02, 0.0, behind) * (1.0 - smoothstep(0.0, 0.08, behind));	float trail = step(0.0, behind) * exp(-behind / p_decay);	float lines = gridLines(i.position);	// The pulse dies out before it restarts, so the jump back to radius 0 never shows	float fade = 1.0 - smoothstep(0.6 * p_range, p_range, radius);	vec3 glow = p_color * p_intensity * (front + trail * lines) * fade;	return vec4(glow, 1.0);}void main() {	Inputs i;	i.uv = v_uv;	i.position = v_position;	// Interpolation shortens the vectors between vertices	i.normal = normalize(v_normal);	i.view = normalize(v_view);	i.time = u_time;	i.fragCoord = gl_FragCoord.xy;	i.resolution = u_resolution;	vec4 frag_out = effect(i);	// The output is sRGB: clamped and encoded once, here, with no tone mapping	// Additive light over a transparent target: premultiplied, as bright as its alpha, so dark adds nothing	vec3 frag_light = u_toSrgb(clamp(frag_out.rgb, 0.0, 1.0)) * frag_out.a;	fragColor = vec4(frag_light, max(max(frag_light.r, frag_light.g), frag_light.b));}

// World-space scan → Scanner pulse, Godot 4. From Creative Center, MIT license.shader_type spatial;// Emission: a black base color, no specular or ambient light, and the effect as EMISSION, which glow catchesrender_mode specular_disabled, ambient_light_disabled, blend_add;uniform float period : hint_range(0.5, 6.0, 0.1) = 2.5;uniform float range : hint_range(1.0, 6.0, 0.1) = 2.8;uniform float decay : hint_range(0.05, 2.0, 0.05) = 0.35;uniform float spacing : hint_range(0.05, 1.0, 0.01) = 0.3;uniform vec3 color : source_color = vec3(0.3, 0.85, 1.0);uniform float intensity : hint_range(0.0, 4.0, 0.05) = 1.5;struct Inputs {	vec2 uv;	vec3 position;	vec3 normal;	vec3 view;	float time;	vec2 fragCoord;	vec2 resolution;};// The scanner sits just under the test sphere, as if on the ground below it. In a game this is a uniform the script// sets to the scanner's world position.const vec3 origin = vec3(0.0, -1.2, 0.0);// 1 on the world planes where a coordinate is a whole multiple of the spacing, fading out within 8% of a cellfloat gridLines(vec3 p) {	vec3 offset = abs(fract(p / spacing + 0.5) - 0.5);	vec3 line = 1.0 - smoothstep(vec3(0.0), vec3(0.08), offset);	return max(line.x, max(line.y, line.z));}vec4 effect(Inputs i) {	float radius = fract(i.time / period) * range;	float dist = distance(i.position, origin);	// Positive where the pulse has already passed, negative ahead of it	float behind = radius - dist;	float front = smoothstep(-0.02, 0.0, behind) * (1.0 - smoothstep(0.0, 0.08, behind));	float trail = step(0.0, behind) * exp(-behind / decay);	float lines = gridLines(i.position);	// The pulse dies out before it restarts, so the jump back to radius 0 never shows	float fade = 1.0 - smoothstep(0.6 * range, range, radius);	vec3 glow = color * intensity * (front + trail * lines) * fade;	return vec4(glow, 1.0);}void fragment() {	Inputs i;	// Godot's UV starts at the top-left; the effect expects GLSL's bottom-left	i.uv = vec2(UV.x, 1.0 - UV.y);	// VERTEX, NORMAL and VIEW are in view space here; the effect works in world space	i.position = (INV_VIEW_MATRIX * vec4(VERTEX, 1.0)).xyz;	i.normal = normalize((INV_VIEW_MATRIX * vec4(NORMAL, 0.0)).xyz);	i.view = normalize((INV_VIEW_MATRIX * vec4(VIEW, 0.0)).xyz);	i.time = TIME;	// FRAGCOORD's origin is the top-left too	i.resolution = VIEWPORT_SIZE;	i.fragCoord = vec2(FRAGCOORD.x, i.resolution.y - FRAGCOORD.y);	vec4 frag_out = effect(i);	ALBEDO = vec3(0.0);	EMISSION = frag_out.rgb;	ALPHA = frag_out.a;}