new build gui select

Shaders/fire.gdshader

@@ -0,0 +1,43 @@
+shader_type spatial;
+render_mode unshaded, cull_disabled;
+
+// uniforms: detail_strength, scroll_speed, fire_height, fire_shape,
+// fire_thickness, fire_sharpness, intensity
+// noise parameters: noise_octaves, noise_lacunarity, noise_gain,
+// noise_amplitude, noise_frequency
+
+//float hash(vec2 p) { /* ... */ }
+//float noise(vec2 x) { /* ... */ }
+//float fbm(vec2 p) { /* ...mix octaves...*/ }
+
+void fragment() {
+    vec2 uv = UV;
+    vec2 muv = -uv;
+    muv.x = mod(muv.x, 1.0) - 0.5;
+    muv.y += 0.84;
+
+    float scroll = scroll_speed * detail_strength * TIME;
+    float n = fbm(detail_strength * muv - vec2(0.0, scroll));
+
+    float fire_intensity = intensity - 16.0 * fire_sharpness * pow(
+        max(0.0,
+            length(
+                muv * vec2((1.0/fire_thickness) + muv.y * fire_shape, 1.0/fire_height)
+            ) - n * max(0.0, muv.y + 0.25)
+        ), 1.2
+    );
+
+    float fi1 = clamp(n * fire_intensity * (1.5 - pow(uv.y, 14.0)), 0.0, 1.0);
+
+    vec3 col = vec3(
+        1.5 * fi1,
+        1.5 * pow(fi1, 3.0),
+        pow(fi1, 6.0)
+    );
+
+    float alpha = fire_intensity * (1.0 - pow(uv.y, 3.0));
+    vec4 final = vec4(mix(vec3(0.0), col, alpha), alpha);
+
+    ALBEDO = final.rgb;
+    ALPHA = final.a;
+}