more hud work

assets/Shaders/blur.gdshader

@@ -0,0 +1,40 @@
+shader_type canvas_item;
+
+#define pow2(x) (x * x)
+#define iResolution 1.0/SCREEN_PIXEL_SIZE
+
+uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmap;
+uniform float strength : hint_range(0.0, 5.0, 0.1) = 3.0;
+const float pi = atan(1.0) * 4.0;
+const int samples = 35;
+const float sigma = float(samples) * 0.25;
+
+float gaussian(vec2 i) {
+    return 1.0 / (2.0 * pi * pow2(sigma)) * exp(-((pow2(i.x) + pow2(i.y)) / (2.0 * pow2(sigma))));
+}
+
+vec3 blur(sampler2D sp, vec2 uv, vec2 scale) {
+    vec3 col = vec3(0.0);
+    float accum = 0.0;
+    float weight;
+    vec2 offset;
+    
+    for (int x = -samples / 2; x < samples / 2; ++x) {
+        for (int y = -samples / 2; y < samples / 2; ++y) {
+            offset = vec2(float(x), float(y));
+            weight = gaussian(offset);
+            col += texture(sp, uv + scale * offset).rgb * weight;
+            accum += weight;
+        }
+    }
+    
+    return col / accum;
+}
+
+void fragment() {
+    vec2 ps = vec2(1.0) / iResolution.xy * .000001 * strength;
+    vec2 uv = UV ;
+    
+    COLOR.rgb = blur(SCREEN_TEXTURE, uv, ps );
+    COLOR.a = 1.0;
+}