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Proximity Fade shader include for Godot
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| /** | |
| * Proximity Fade shader include | |
| * | |
| * Based on Godot's proximity fade shader feature: | |
| * https://github.com/godotengine/godot/blob/97b8ad1af0f2b4a216f6f1263bef4fbc69e56c7b/scene/resources/material.cpp#L1643 | |
| * | |
| * Usage: | |
| // Include snippet | |
| #include "proximity-fade.gdshaderinc" | |
| // Declare depth texture; param is ignored | |
| USE_DEPTH_TEXTURE(1) | |
| // Or declare your texture manually | |
| uniform sampler2D depth_tex : hint_depth_texture, repeat_disable, filter_nearest; | |
| void fragment() { | |
| // Fade with proximity, argument is distance | |
| ALPHA *= PROXIMITY_FADE(2.); | |
| // Or use your own depth texture | |
| ALPHA *= PRORXIMITY_FADE_TEX(depth_tex, 2.); | |
| } | |
| * | |
| * Plugs in case you want to support / follow us: | |
| * Kofi https://ko-fi.com/foxssake | |
| * Discord https://discord.gg/xWGh4GskG5 | |
| * Xitter https://x.com/elementbound | |
| * Github https://github.com/foxssake | |
| */ | |
| #define USE_DEPTH_TEXTURE(_) uniform sampler2D _DEPTH_TEXTURE : hint_depth_texture, repeat_disable, filter_nearest; | |
| #define PROXIMITY_FADE(dst) (_proximity_fade(dst, VERTEX, _DEPTH_TEXTURE, SCREEN_UV, INV_PROJECTION_MATRIX)) | |
| #define PROXIMITY_FADE_TEX(tex, dst) (_proximity_fade(dst, VERTEX, tex, SCREEN_UV, INV_PROJECTION_MATRIX)) | |
| float _proximity_fade(float fade_dst, vec3 vertex, sampler2D depth_texture, vec2 screen_uv, mat4 inv_proj_matrix) { | |
| float depth = textureLod(depth_texture, screen_uv, 0.0).r; | |
| vec4 world_pos = inv_proj_matrix * vec4(screen_uv*2.0-1.0, depth, 1.0); | |
| world_pos.xyz /= world_pos.w; | |
| return clamp(1. - smoothstep(world_pos.z + fade_dst, world_pos.z, vertex.z), 0.0, 1.0); | |
| } |
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