Added a basic skylight engine. Currently it's really laggy.

Also tried fixing the autobuild action since it fetches the repo without submodules.

src/helpers/vars.hpp

@@ -1,3 +1,4 @@
+#include <functional>
 #if INTERFACE
 
 #ifdef Escape
@@ -101,7 +102,7 @@
 #define TPS 30.0
 #define TPS_DIV 1.0 / TPS
 //Rendering
-#define RENDER_DISTANCE 128
+#define RENDER_DISTANCE 2
 #define RENDER_DISTANCE_SQUARED RENDER_DISTANCE*RENDER_DISTANCE
 
 //Game stuff
@@ -179,7 +180,7 @@ struct Chunk {
     uint16_t opaqueMask[CHUNK_DATA_SIZE/16];
     uint16_t airMask[CHUNK_DATA_SIZE/16];
     uint8_t highestBlock[CHUNK_SIZE*CHUNK_SIZE];
-    uint8_t lights[CHUNK_DATA_SIZE];
+    uint16_t light[CHUNK_DATA_SIZE];
 };
 #ifndef SERVER
 struct ChunkRenderData {
@@ -220,10 +221,20 @@ struct Quad2D {
 };
 #endif
 struct Vector3I {
-    int x;
-    int y;
-    int z;
+    int x, y, z;
+    bool operator==(const Vector3I& other) const {
+        return (x == other.x && y == other.y && z == other.z);
+    };
 };
+struct Vector3IHash {
+    size_t operator()(const Vector3I& p) const noexcept {
+        size_t h1 = std::hash<int>{}(p.x);
+        size_t h2 = std::hash<int>{}(p.y);
+        size_t h3 = std::hash<int>{}(p.z);
+        return h1 ^ (h2 << 1) ^ (h3 << 2);
+    }
+};
+
 struct Entity {
     uint8_t type;
     uint8_t id;