more stuff

cubes.c

@@ -1,27 +1,50 @@
 #include "const.h"
+//#include <stdio.h>
+#include <stdlib.h>
 
 // placeholder function
 int cubeExists(int x, int y, int z) {
-  return ((x % 3) == (y % 4) && (y % 5) == (z % 6));
+  srand(x ^ y ^ z);
+  return ((rand() % 3 == 0) && y == 1);
 }
 
-void gen_face(Vertex *cube, int i, int x, int y, int z, int j) {
-  Vertex a = {{x,y,z}};
+void gen_face(Vertex *cube, int i, int x, int y, int z, int j, int is_text) {
+  Vertex a = {{x, y, z}};
+
+  if (is_text) {
+    a.pos[i]--;
+    int exists =
+        cubeExists(x, y, z) != cubeExists(a.pos[0], a.pos[1], a.pos[2]);
+    a.pos[0] = exists ? TEXT_GAP_H * i : -1.0;
+    a.pos[1] = exists ? TEXT_GAP_V * i : -1.0;
+    a.pos[2] = 0;
+  }
+
   Vertex b = a;
-  b.pos[(i==0)?1:0]++;
   Vertex c = a;
-  c.pos[(i==2)?1:2]++;
-  Vertex d = c;
-  d.pos[(i==0)?1:0]++;
+  Vertex d = a;
+
+  if (is_text) {
+    b.pos[0] += TEXT_GAP_H;
+    c.pos[1] += TEXT_GAP_V;
+    d.pos[0] += TEXT_GAP_H;
+    d.pos[1] += TEXT_GAP_V;
+  } else {
+    b.pos[(i == 0) ? 1 : 0]++;
+    c.pos[(i == 2) ? 1 : 2]++;
+    d.pos[(i == 0) ? 1 : 0]++;
+    d.pos[(i == 2) ? 1 : 2]++;
+  }
+
   cube[j] = a;
-  cube[j+1] = b;
-  cube[j+2] = c;
-  cube[j+3] = c;
-  cube[j+4] = b;
-  cube[j+5] = d;
+  cube[j + 1] = b;
+  cube[j + 2] = c;
+  cube[j + 3] = c;
+  cube[j + 4] = b;
+  cube[j + 5] = d;
 }
 
-void gen_cubes(Vertex *cube, int x, int y, int z) {
+void gen_cubes(Vertex *cube, int x, int y, int z, int is_text) {
   int i = 0;
   for (int y2 = y; y2 < y + CHUNK_LENGTH; y2++) {
     int y3 = y2;
@@ -29,9 +52,14 @@ void gen_cubes(Vertex *cube, int x, int y, int z) {
       int x3 = x2;
       for (int z2 = z; z2 < z + CHUNK_LENGTH; z2++) {
         int z3 = z2;
-        gen_face(cube, 0, x3, y3, z3, i);
-        gen_face(cube, 1, x3, y3, z3, i + 6);
-        gen_face(cube, 2, x3, y3, z3, i + 12);
+
+        if (is_text) {
+          x3 = y3 = z3 = 0;
+        }
+
+        gen_face(cube, 0, x2, y2, z2, i, is_text);
+        gen_face(cube, 1, x2, y2, z2, i + 6, is_text);
+        gen_face(cube, 2, x2, y2, z2, i + 12, is_text);
         i += 18;
       }
     }