Cube Mesh Glow Outline
Simple glow outline shader that has adjustable width, sharpness, glow, and color
Only works with a cube mesh with the size set to (1, 1, 1) and is scaled using the shader
Also needs a custom aabb or it won’t cull properly
Demo project has everything setup properly and a collision shape that adjusts itself to the shader scale which is handy for making simple levels quickly
Shader code
shader_type spatial;
uniform vec3 scale = vec3(2.0);
uniform float width: hint_range(0.0, 10.0) = 0.25;
uniform float sharpness: hint_range(0.0, 1.0) = 0.5;
uniform float glow: hint_range(1.0, 16.0) = 4.0;
uniform vec4 color: hint_color = vec4(1.0);
uniform sampler2D tex: hint_albedo;
varying vec3 vert;
varying vec3 normal;
void vertex(){
VERTEX += sign(VERTEX) * (scale - 1.0) * 0.5;
vert = VERTEX;
normal = abs(NORMAL);
}
void fragment(){
vec3 fv = fract(vec3(vert.x, vert.y * -1.0, vert.z));
vec3 vs = abs(vert) - scale * 0.5;
float ws = width * sharpness;
ALBEDO = (texture(tex, fv.zy).rgb * normal.x + texture(tex, fv.xz).rgb * normal.y + texture(tex, fv.xy).rgb * normal.z) * float(width < length(vs.xy)) * float(width < length(vs.yz)) * float(width < length(vs.xz));
EMISSION = (1.0 - smoothstep(ws, width, length(vs.xy)) * smoothstep(ws, width, length(vs.yz)) * smoothstep(ws, width, length(vs.xz))) * color.rgb * glow;
}
