feat: post-effects array parameters & add gfx.posteffects.set_array & make shadows opacity depending on clouds opacity

res/shaders/lib/shadows.glsl

@@ -1,10 +1,14 @@
 #ifndef SHADOWS_GLSL_
 #define SHADOWS_GLSL_
 
+#include <constants>
+
 uniform sampler2DShadow u_shadows[2];
 uniform mat4 u_shadowsMatrix[2];
 uniform float u_dayTime;
 uniform int u_shadowsRes;
+uniform float u_shadowsOpacity;
+uniform float u_shadowsSoftness;
 
 float calc_shadow() {
     if (!u_enableShadows) {
@@ -12,24 +16,25 @@ float calc_shadow() {
     }
 
     float step = 1.0 / float(u_shadowsRes);
-    float s = pow(abs(cos(u_dayTime * 6.283185)), 0.5); // 2*PI precomputed
-    vec3 normalOffset = a_realnormal * (a_distance > 128.0 ? 0.2 : 0.04);
-    int shadowIdx = a_distance > 128.0 ? 1 : 0;
+    float s = pow(abs(cos(u_dayTime * PI2)), 0.25) * u_shadowsOpacity;
+    vec3 normalOffset = a_realnormal * (a_distance > 64.0 ? 0.2 : 0.04);
+    int shadowIdx = a_distance > 64.0 ? 1 : 0;
 
     vec4 mpos = u_shadowsMatrix[shadowIdx] * vec4(a_modelpos.xyz + normalOffset, 1.0);
     vec3 projCoords = mpos.xyz / mpos.w;
     projCoords = projCoords * 0.5 + 0.5;
-    projCoords.z -= 0.0001;
+    projCoords.z -= 0.00001;
 
     float shadow = 0.0;
     if (dot(a_realnormal, u_sunDir) < 0.0) {
-        for (int y = -1; y <= 1; y++) {
-            for (int x = -1; x <= 1; x++) {
-                vec3 offset = vec3(x, y, -(abs(x) + abs(y))) * step;
+        // 5x5 kernel
+        for (int y = -2; y <= 2; y++) {
+            for (int x = -2; x <= 2; x++) {
+                vec3 offset = vec3(x, y, -(abs(x) + abs(y)) * 0.1) * step * 2.0 * u_shadowsSoftness;
                 shadow += texture(u_shadows[shadowIdx], projCoords + offset);
             }
         }
-        shadow /= 9.0;
+        shadow /= 25.0;
     } else {
         shadow = 0.5;
     }