refactor: update grass block texture

include/Cubed/config.hpp

@@ -57,14 +57,49 @@ constexpr float VERTICES_POS[6][6][3] = {
     };
 
 constexpr float TEX_COORDS[6][6][2] = {
-        0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-        0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-        0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-        0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-        0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-        0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-
-    };
+    // ===== front (z = +1) =====
+    0.0f, 1.0f,  // bottom left
+    0.0f, 0.0f,  // top left
+    1.0f, 0.0f,  // top right
+    1.0f, 0.0f,  // top right
+    1.0f, 1.0f,  // bottom right
+    0.0f, 1.0f,  // bottom left
+    // ===== right (x = +1) =====
+    0.0f, 1.0f,  // bottom front
+    1.0f, 1.0f,  // bottom back
+    1.0f, 0.0f,  // top back
+    1.0f, 0.0f,  // top back
+    0.0f, 0.0f,  // top front
+    0.0f, 1.0f,  // bottom front
+    // ===== back (z = -1) =====
+    1.0f, 1.0f,  // bottom left
+    0.0f, 1.0f,  // bottom right
+    0.0f, 0.0f,  // top right
+    0.0f, 0.0f,  // top right
+    1.0f, 0.0f,  // top left
+    1.0f, 1.0f,  // bottom left
+    // ===== left (x = -1) =====
+    1.0f, 1.0f,  // bottom back
+    0.0f, 1.0f,  // bottom front
+    0.0f, 0.0f,  // top front
+    0.0f, 0.0f,  // top front
+    1.0f, 0.0f,  // top back
+    1.0f, 1.0f,  // bottom back
+    // ===== top (y = +1) =====
+    0.0f, 0.0f,  // back left
+    1.0f, 0.0f,  // back right
+    1.0f, 1.0f,  // front right
+    1.0f, 1.0f,  // front right
+    0.0f, 1.0f,  // front left
+    0.0f, 0.0f,  // back left
+    // ===== bottom (y = -1) =====
+    0.0f, 0.0f,  // front left
+    1.0f, 0.0f,  // front right
+    1.0f, 1.0f,  // back right
+    1.0f, 1.0f,  // back right
+    0.0f, 1.0f,  // back left
+    0.0f, 0.0f,  // front left
+};
 
 constexpr float CUBE_VER[24] = {
         0.0, 0.0, 0.0,