rj-action-library/Runtime/Shading/Shaders/Effects/Outline/Outline.gdshader

shader_type spatial;
render_mode blend_mix, world_vertex_coords, depth_draw_opaque, cull_front, diffuse_burley, specular_schlick_ggx, unshaded;

#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Math.gdshaderinc"
#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Transform.gdshaderinc"
#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Noise.gdshaderinc"

uniform vec4 albedo : source_color;
uniform float size:hint_range(0,10) = 1;
uniform float sizeCloseScale : hint_range(0,10) = 1;
uniform float sizeFarScale : hint_range(0,10) = 0.5;
uniform float closeDistance = 20;
uniform float farDistance = 40;
uniform float opacityModulationStrength : hint_range(0,1) = 0.2;
uniform float opacityModulationDuration : hint_range(0,10) = 1;

varying vec4 appliedColor;

void vertex()
{
  float cameraDistance = distance( VERTEX, CAMERA_POSITION_WORLD );
  float outlineSize = size * mapClamped( cameraDistance, closeDistance, farDistance, sizeCloseScale, sizeFarScale );
	VERTEX += NORMAL * outlineSize/500.0 * cameraDistance;

  float sinTime = sin( mod( TIME, opacityModulationDuration ) / opacityModulationDuration * PI * 2.0 ) / 2.0;
  float alpha = 1.0 - opacityModulationStrength * 0.5 + sinTime * opacityModulationStrength;

  appliedColor = albedo ;
  appliedColor.a *= alpha;
}

void fragment()
{
	ALBEDO = appliedColor.rgb;
  ALPHA = appliedColor.a;
}