Added day&night cycle. Also fixed world loading

data/resources/shaders/terrain.fs

@@ -0,0 +1,37 @@
+#version 330
+
+in vec2 fragTexCoord;
+in vec4 fragColor;
+in vec3 fragPosition;
+in vec3 fragNormal;
+
+uniform sampler2D texture0;
+uniform vec4 sunlightColor;
+
+uniform vec3 lightDir;
+
+out vec4 finalColor;
+
+void main()
+{
+    vec4 texelColor = texture(texture0, fragTexCoord);
+
+    vec3 N = normalize(fragNormal);
+    vec3 L = normalize(lightDir);
+
+    float ndotl = max(dot(N, L), 0.0);
+    float ambient = 0.1;
+    float sunfactor = ambient + (1.0 - ambient) * ndotl;
+
+    sunfactor *= 1+min(0, L.y);
+    vec3 Lmoon = normalize(-lightDir);
+    float ndotlMoon = max(dot(N, Lmoon), 0.0);
+    float moonfactor = (ambient + (1.0 - ambient) * ndotlMoon) * 8;
+    moonfactor *= max(0, -L.y);
+
+    // In fragColor, 'r' is blocklight R, 'g' is blocklight G, 'b' is blocklight B and 'a' is sunlight
+    texelColor.r *= fragColor.a * sunlightColor.r * (sunfactor+moonfactor) + fragColor.r;
+    texelColor.g *= fragColor.a * sunlightColor.g * (sunfactor+moonfactor) + fragColor.g;
+    texelColor.b *= fragColor.a * sunlightColor.b * (sunfactor+moonfactor) + fragColor.b;
+    finalColor = texelColor;
+}