improve shading & enable disabled elements

res/scripts/hud.lua

@@ -58,5 +58,5 @@ function on_hud_open()
 
     local slot = gfx.posteffects.index("core:default")
     gfx.posteffects.set_effect(slot, "ssao")
-    --gfx.posteffects.set_intensity(slot, 1.0)
+    gfx.posteffects.set_intensity(slot, 1.0)
 end

res/shaders/background.glslf

@@ -7,7 +7,7 @@ uniform samplerCube u_cubemap;
 
 void main(){
     vec3 dir = normalize(v_coord);
-    f_position = vec4(0.0, 0.0, 0.0, 1e9);
+    f_position = vec4(0.0, 0.0, 0.0, 0.0);
     f_normal = vec4(0.0);
     f_color = texture(u_cubemap, dir);
 }

res/shaders/effects/ssao.glsl

@@ -1,6 +1,6 @@
 uniform vec3 u_ssaoSamples[64];
 
-int kernelSize = 32;
+int kernelSize = 16;
 float radius = 0.25;
 float bias = 0.025;
 
@@ -32,8 +32,10 @@ vec4 effect() {
             float rangeCheck = smoothstep(0.0, 1.0, radius / abs(position.z - sampleDepth));
             occlusion += (sampleDepth >= samplePos.z + bias ? 1.0 : 0.0) * rangeCheck;
         }
-        occlusion = 1.1 - (occlusion / kernelSize);
+        occlusion = min(1.0, 1.05 - (occlusion / kernelSize));
     }
 
-    return vec4(color * occlusion, 1.0);
+    float z = -position.z * 0.02;
+    z = max(0.0, 1.0 - z);
+    return vec4(color * mix(1.0, occlusion, z), 1.0);
 }

res/shaders/main.glslf

@@ -14,6 +14,8 @@ in vec4 a_modelpos;
 uniform sampler2D u_texture0;
 uniform samplerCube u_cubemap;
 uniform sampler2DShadow u_shadows;
+uniform vec3 u_sunDir;
+uniform int u_shadowsRes;
 
 // flags
 uniform bool u_alphaClip;
@@ -28,21 +30,27 @@ const int BLUR_SAMPLES = 6;
 void main() {
     float shadow = 1.0;
     if (u_enableShadows) {
-        vec4 mpos = u_shadowsMatrix * vec4(a_modelpos.xyz, 1.0);
+        vec4 mpos = u_shadowsMatrix * vec4(a_modelpos.xyz + a_realnormal * 0.08, 1.0);
         vec3 projCoords = mpos.xyz / mpos.w;
         projCoords = projCoords * 0.5 + 0.5;
         projCoords.z -= 0.0001;
 
         shadow = 0.0;
         
-        for (int i = 0; i < BLUR_SAMPLES; i++) {
-            shadow += texture(u_shadows, projCoords.xyz + vec3(
-                -0.002*(i%2==0?1:0)*i/BLUR_SAMPLES / 4.0,
-                -0.002*(i%2==0?0:1)*i/BLUR_SAMPLES / 4.0,
-                -0.0005 * i/BLUR_SAMPLES));
+        if (dot(a_realnormal, u_sunDir) < 0.0) {
+            for (int x = -1; x <= 1; x++) {
+                for (int y = -1; y <= 1; y++) {
+                    shadow += texture(u_shadows, projCoords.xyz + vec3(
+                        x * (1.0 / u_shadowsRes), 
+                        y * (1.0 / u_shadowsRes), 0.0
+                    ));
+                }
+            }
+            shadow /= 9;
+            shadow = shadow * 0.5 + 0.5;
+        } else {
+            shadow = 0.5;
         }
-        shadow /= BLUR_SAMPLES;
-        shadow = shadow * 0.5 + 0.5;
     }
 
     vec3 fogColor = texture(u_cubemap, a_dir).rgb;
@@ -63,7 +71,7 @@ void main() {
     }
     f_color = a_color * texColor;
     f_color.rgb *= shadow;
-    f_color = mix(f_color, vec4(fogColor,1.0), a_fog);
+    f_color = mix(f_color, vec4(fogColor, 1.0), a_fog);
     f_color.a = alpha;
     f_position = vec4(a_position, 1.0);
     f_normal = vec4(a_normal, 1.0);

res/shaders/main.glslv

@@ -37,11 +37,11 @@ void main() {
     vec3 pos3d = modelpos.xyz-u_cameraPos;
     modelpos.xyz = apply_planet_curvature(modelpos.xyz, pos3d);
 
-    a_realnormal = v_normal.xyz;
+    a_realnormal = v_normal.xyz * 2.0 - 1.0;
     mat3 normalMatrix = transpose(inverse(mat3(u_view * u_model)));
-    a_normal = v_normal.xyz * 2.0 - 1.0;
+    a_normal = a_realnormal;
     a_normal = normalMatrix * (false ? -a_normal : a_normal);
-    //a_normal = v_normal.xyz * 2.0 - 1.0;
+    //a_normal = a_realnormal;
 
     vec3 light = v_light.rgb;
     float torchlight = max(0.0, 1.0-distance(u_cameraPos, modelpos.xyz) /