From 797aab3443bafc95486bacf8623153c0222655d2 Mon Sep 17 00:00:00 2001
From: zoe <zoeoosting@outlook.com>
Date: Mon, 9 May 2022 16:17:40 +0200
Subject: [PATCH] steal shader hehe (i still need to see if this actually
 works)

---
 godot/world/Tilemap.tscn | 69 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 68 insertions(+), 1 deletion(-)

diff --git a/godot/world/Tilemap.tscn b/godot/world/Tilemap.tscn
index d835d56..7c73056 100644
--- a/godot/world/Tilemap.tscn
+++ b/godot/world/Tilemap.tscn
@@ -1,10 +1,77 @@
-[gd_scene load_steps=3 format=2]
+[gd_scene load_steps=5 format=2]
 
 [ext_resource path="res://world/terrain/terrain.tres" type="TileSet" id=1]
 [ext_resource path="res://world/Tilemap.gd" type="Script" id=2]
 
+[sub_resource type="Shader" id=1]
+code = "// My custom shader for implementing dithered alpha
+shader_type spatial;
+render_mode blend_mix,depth_draw_opaque,cull_disabled,diffuse_burley,specular_schlick_ggx;
+
+// Texture maps
+uniform sampler2D texture_albedo : hint_albedo;
+uniform sampler2D texture_masks : hint_white;
+uniform sampler2D texture_normal : hint_normal;
+
+// Parameters
+uniform vec4 albedo : hint_color;
+uniform float specular = 0.5;
+uniform float metallic = 0.0;
+uniform float roughness : hint_range(0,1) = 0.5;
+uniform float normal_strength : hint_range(0,2) = 1.0;
+
+void fragment() {
+    vec4 albedo_tex = texture(texture_albedo, UV);
+    vec4 masks_tex = texture(texture_masks, UV);
+    float alpha = albedo_tex.a;
+
+    ALBEDO = albedo.rgb * albedo_tex.rgb;
+    METALLIC = metallic * masks_tex.r;
+    ROUGHNESS = roughness * masks_tex.g;
+    NORMALMAP = texture(texture_normal, UV).rgb;
+    NORMALMAP_DEPTH = normal_strength;
+
+    // Fancy dithered alpha stuff
+    float opacity = albedo_tex.a;
+    int x = int(FRAGCOORD.x) % 4;
+    int y = int(FRAGCOORD.y) % 4;
+    int index = x + y * 4;
+    float limit = 0.0;
+
+    if (x < 8) {
+        if (index == 0) limit = 0.0625;
+        if (index == 1) limit = 0.5625;
+        if (index == 2) limit = 0.1875;
+        if (index == 3) limit = 0.6875;
+        if (index == 4) limit = 0.8125;
+        if (index == 5) limit = 0.3125;
+        if (index == 6) limit = 0.9375;
+        if (index == 7) limit = 0.4375;
+        if (index == 8) limit = 0.25;
+        if (index == 9) limit = 0.75;
+        if (index == 10) limit = 0.125;
+        if (index == 11) limit = 0.625;
+        if (index == 12) limit = 1.0;
+        if (index == 13) limit = 0.5;
+        if (index == 14) limit = 0.875;
+        if (index == 15) limit = 0.375;
+    }
+    // Is this pixel below the opacity limit? Skip drawing it
+    if (opacity < limit)
+        discard;
+}"
+
+[sub_resource type="ShaderMaterial" id=2]
+shader = SubResource( 1 )
+shader_param/albedo = null
+shader_param/specular = 0.5
+shader_param/metallic = 0.0
+shader_param/roughness = 0.5
+shader_param/normal_strength = 1.0
+
 [node name="Tilemap" type="TileMap"]
 process_priority = 124
+material = SubResource( 2 )
 position = Vector2( -2, 0 )
 mode = 1
 tile_set = ExtResource( 1 )