minecraft

commit 5f726bff1320e104721e4d01a8e24aa8800cd746
parent 8f13d38ecb67d9d63b663b199c6c1dfcf1199b3c
Author: evenfri <evenfri@4plt.ch>
Date:   Mon,  2 Nov 2026 22:42:39 +0800

culling faces, fix faces for ccw

Diffstat:
M
render.c
 | 
73
+++++++++++++++++++++++++++++++++++++------------------------------------
M
window.c
 | 
3
+++
M
world.c
 | 
15
+++++----------

3 files changed, 45 insertions(+), 46 deletions(-)
diff --git a/render.c b/render.c
@@ -9,52 +9,52 @@ static int u_model, u_view, u_proj;
 void render_init() {
   float vertices[] = {
     /* back */
-    -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
-    0.5f, -0.5f, -0.5f,  1.0f, 0.0f,
-    0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-    0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-    -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
-    -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
+    -0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
+    -0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
+    0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
+    0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
+    0.5f, -0.5f, -0.5f, 1.0f, 0.0f,
+    -0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
 
     /* front */
-    -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
-    0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
-    0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
-    0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
-    -0.5f,  0.5f,  0.5f,  0.0f, 1.0f,
-    -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+    -0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
+    0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
+    0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
+    0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
+    -0.5f, 0.5f, 0.5f, 0.0f, 1.0f,
+    -0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
 
     /* left */
-    -0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
-    -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
-    -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
-    -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
-    -0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
-    -0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
+    -0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
+    -0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
+    -0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
+    -0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
+    -0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
+    -0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
 
     /* right */
-    0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
-    0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
-    0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
-    0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
-    0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
-    0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
+    0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
+    0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
+    0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
+    0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
+    0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
+    0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
 
     /* bottom */
-    -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-    0.5f, -0.5f, -0.5f,  1.0f, 1.0f,
-    0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
-    0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
-    -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
-    -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+    -0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
+    0.5f, -0.5f, -0.5f, 1.0f, 1.0f,
+    0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
+    0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
+    -0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
+    -0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
 
     /* top */
-    -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
-    0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-    0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-    0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-    -0.5f,  0.5f,  0.5f,  0.0f, 0.0f,
-    -0.5f,  0.5f, -0.5f,  0.0f, 1.0f
+    -0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
+    -0.5f, 0.5f, 0.5f, 0.0f, 0.0f,
+    0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
+    0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
+    0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
+    -0.5f, 0.5f, -0.5f, 0.0f, 1.0f
   };
 
   glGenVertexArrays(1, &VAO);
@@ -91,6 +91,7 @@ void render_block(unsigned int block_id, vec3 pos,
     uint8_t r_right,
     uint8_t r_bottom,
     uint8_t r_top) {
+  if (!(r_back || r_front || r_left || r_right || r_bottom || r_top)) return;
   mat4 model = mat4_translate(pos.x, pos.y, pos.z);
   glUniformMatrix4fv(u_model, 1, GL_FALSE, model.m);
 
diff --git a/window.c b/window.c
@@ -47,4 +47,7 @@ void window_init() {
   glfwSetInputMode(Window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
 
   glEnable(GL_DEPTH_TEST);
+  glEnable(GL_CULL_FACE);
+  glCullFace(GL_BACK);
+  glFrontFace(GL_CCW);
 }
diff --git a/world.c b/world.c
@@ -6,19 +6,15 @@ Chunk_t* world_generate_chunk(vec3 position) {
   Chunk_t *ret = calloc(1, sizeof(*ret));
   if (!ret) { perror("calloc"); exit(1); }
 
-  int block_id = 0;
+  int block_id = BLOCK_AIR;
+  const int surface = CHUNK_HEIGHT / 2;
 
   for (int x = 0; x < CHUNK_SIZE; x++) {
     for (int z = 0; z < CHUNK_SIZE; z++) {
       for (int y = 0; y < CHUNK_HEIGHT/2; y++) {
-        if (y >= CHUNK_HEIGHT/2) {
-        } else if (y == (CHUNK_HEIGHT/2) - 1) {
-          block_id = BLOCK_GRASS;
-        } else if (y >= (CHUNK_HEIGHT/2) - 3) {
-          block_id = BLOCK_DIRT;
-        } else {
-          block_id = BLOCK_STONE;
-        }
+        if (y == surface - 1) block_id = BLOCK_GRASS;
+        else if (y >= surface - 3) block_id = BLOCK_DIRT;
+        else if (y < surface) block_id = BLOCK_STONE;
 
         ret->blocks[x][y][z] = block_id;
       }
@@ -26,7 +22,6 @@ Chunk_t* world_generate_chunk(vec3 position) {
   }
 
   ret->position = position;
-
   return ret; 
 }