marching cubes runs on GPU

Game.cpp

@@ -10,29 +10,8 @@
 #include "gaming-core/wrapper/GL.h"
 
 static GLuint texture3d;
-static List<Vector3, 122880> list;
 static float tData[16][16][16];
 
-static void addCube(int x, int y, int z) {
-    bool b1 = tData[x][y][z] < 0.5f;
-    bool b2 = tData[x + 1][y][z] < 0.5f;
-    bool b3 = tData[x + 1][y][z + 1] < 0.5f;
-    bool b4 = tData[x][y][z + 1] < 0.5f;
-    bool b5 = tData[x][y + 1][z] < 0.5f;
-    bool b6 = tData[x + 1][y + 1][z] < 0.5f;
-    bool b7 = tData[x + 1][y + 1][z + 1] < 0.5f;
-    bool b8 = tData[x][y + 1][z + 1] < 0.5f;
-
-    int index = (b1 << 7) | (b2 << 6) | (b3 << 5) | (b4 << 4) | (b5 << 3) |
-                (b6 << 2) | (b7 << 1) | b8;
-
-    Vector3 v(static_cast<float>(x), static_cast<float>(y),
-              static_cast<float>(z));
-    for(int i = 0; i < 12; i++) {
-        list.add(MarchingCubes::getVector(index, i) + v);
-    }
-}
-
 Game::Game(Shader& shader, Buttons& buttons, const Size& size)
     : shader(shader), buttons(buttons), size(size),
       frustum(60, 0.1f, 1000.0f, size), up(buttons.add(GLFW_KEY_SPACE, "Up")),
@@ -42,37 +21,20 @@ Game::Game(Shader& shader, Buttons& buttons, const Size& size)
       front(buttons.add(GLFW_KEY_W, "front")),
       back(buttons.add(GLFW_KEY_S, "back")) {
     shader.use();
-    // vertexBuffer.setAttributes(Attributes().addFloat(3));
 
     Random r(0);
     for(int x = 0; x < 16; x++) {
         for(int y = 0; y < 16; y++) {
             for(int z = 0; z < 16; z++) {
-                if(x == 0 || x == 15 || y == 0 || y == 15 || z == 0 ||
-                   z == 15) {
-                    tData[z][x][y] = 0.1f;
-                } else {
-                    // tData[x][y][z] = 1.0f;
-                    float sinX = sinf(M_PI * x / 8.0f);
-                    float cosY = cosf(M_PI * y / 8.0f);
-                    float cosZ = cosf(M_PI * z / 8.0f);
-                    tData[z][x][y] = (sinX * sinX + cosY * cosY + cosZ * cosZ) *
-                                     (1.0f / 3.0f);
-                }
+                float sinX = sinf(M_PI * x / 8.0f);
+                float cosY = cosf(M_PI * y / 8.0f);
+                float cosZ = cosf(M_PI * z / 8.0f);
+                tData[z][x][y] =
+                    (sinX * sinX + cosY * cosY + cosZ * cosZ) * (1.0f / 3.0f);
             }
         }
     }
 
-    for(int x = 0; x < 15; x++) {
-        for(int y = 0; y < 15; y++) {
-            for(int z = 0; z < 15; z++) {
-                addCube(x, y, z);
-            }
-        }
-    }
-    vertexBuffer.setStaticData(sizeof(Vector3) * list.getLength(),
-                               list.begin());
-
     glGenTextures(1, &texture3d);
     glBindTexture(GL_TEXTURE_3D, texture3d);
     glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
@@ -80,7 +42,6 @@ Game::Game(Shader& shader, Buttons& buttons, const Size& size)
     glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
     glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_BORDER);
     glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
-
     glTexImage3D(GL_TEXTURE_3D, 0, GL_R32F, 16, 16, 16, 0, GL_RED, GL_FLOAT,
                  tData);
     glActiveTexture(GL_TEXTURE0);
@@ -97,11 +58,7 @@ void Game::render(float lag) {
 
     shader.setMatrix("view", m.getValues());
 
-    glPointSize(10.0f);
-    // vertexBuffer.draw(list.getLength());
-    GL::checkAndPrintError("test3");
     vertexBuffer.drawPoints(0);
-    GL::checkAndPrintError("HERE");
     glDrawArrays(GL_POINTS, 0, 16 * 16 * 16);
 }
 

resources/fragment.fs

@@ -7,15 +7,6 @@ in vec3 varTextureG;
 out vec4 color;
 
 void main(void) {
-    //float f = texture(samp, varTexture).r;
-    //float x = varTexture.x - int(varTexture.x);
-    //float y = varTexture.y - int(varTexture.y);
-    //float z = varTexture.z - int(varTexture.z);
-    //color = vec4(x, y, z, 1.0);
-
     float f = texture(samp, varTextureG).r;
     color = vec4(f, f, f, 1.0);
-
-    //color = vec4(1.0, 1.0, 0.0, 1.0);
-    //color = vec4(varTexture, 0.0, 1.0);
 }

resources/geometry.gs

@@ -1,14 +1,196 @@
 #version 430
 
 layout (points) in;
-layout (points, max_vertices = 1) out;
+layout (triangle_strip, max_vertices = 12) out;
+
+uniform mat4 proj;
+uniform mat4 view;
 
 in vec3 varTexture[];
+in int varIndex[];
 out vec3 varTextureG;
 
-void main (void) {	
-    gl_Position = gl_in[0].gl_Position;
-    varTextureG = varTexture[0];
-    EmitVertex();
-	EndPrimitive();
-}
+vec3 vectors[13] = {
+    vec3(0.0, 0.0, 0.0), vec3(0.5, 1.0, 1.0), vec3(0.0, 0.5, 1.0), 
+    vec3(0.0, 1.0, 0.5), vec3(1.0, 0.5, 1.0), vec3(1.0, 1.0, 0.5),
+    vec3(0.5, 1.0, 0.0), vec3(1.0, 0.5, 0.0), vec3(0.0, 0.5, 0.0), 
+    vec3(0.0, 0.0, 0.5), vec3(0.5, 0.0, 1.0), vec3(1.0, 0.0, 0.5),
+    vec3(0.5, 0.0, 0.0)};
+
+int table[3072] = {
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  2,  3,  0,  0,  0,  0,
+    0,  0,  0,  0,  0,  4,  1,  5,  0,  0,  0,  0,  0,  0,  0,  0,  0,  3,  5,
+    2,  5,  2,  4,  0,  0,  0,  0,  0,  0,  5,  6,  7,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  5,  6,  7,  3,  1,  2,  0,  0,  0,  0,  0,  0,  7,  4,  6,  4,
+    6,  1,  0,  0,  0,  0,  0,  0,  3,  6,  2,  7,  6,  2,  7,  2,  4,  0,  0,
+    0,  3,  8,  6,  0,  0,  0,  0,  0,  0,  0,  0,  0,  6,  1,  8,  1,  8,  2,
+    0,  0,  0,  0,  0,  0,  6,  3,  8,  1,  5,  4,  0,  0,  0,  0,  0,  0,  6,
+    5,  8,  4,  5,  8,  4,  8,  2,  0,  0,  0,  5,  3,  7,  3,  7,  8,  0,  0,
+    0,  0,  0,  0,  5,  1,  7,  2,  1,  7,  2,  7,  8,  0,  0,  0,  1,  3,  4,
+    8,  3,  4,  8,  4,  7,  0,  0,  0,  8,  7,  2,  4,  7,  2,  0,  0,  0,  0,
+    0,  0,  9,  2,  10, 0,  0,  0,  0,  0,  0,  0,  0,  0,  9,  3,  10, 3,  10,
+    1,  0,  0,  0,  0,  0,  0,  4,  1,  5,  2,  10, 9,  0,  0,  0,  0,  0,  0,
+    4,  10, 5,  9,  10, 5,  9,  5,  3,  0,  0,  0,  9,  2,  10, 5,  7,  6,  0,
+    0,  0,  0,  0,  0,  9,  3,  10, 3,  10, 1,  7,  6,  5,  0,  0,  0,  7,  4,
+    6,  4,  6,  1,  9,  10, 2,  0,  0,  0,  4,  10, 7,  3,  10, 7,  3,  10, 9,
+    3,  6,  7,  9,  2,  10, 3,  8,  6,  0,  0,  0,  0,  0,  0,  9,  8,  10, 6,
+    8,  10, 6,  10, 1,  0,  0,  0,  6,  8,  3,  10, 2,  9,  1,  4,  5,  0,  0,
+    0,  4,  5,  6,  4,  10, 6,  8,  10, 6,  8,  10, 9,  5,  3,  7,  3,  7,  8,
+    10, 2,  9,  0,  0,  0,  9,  7,  1,  9,  10, 1,  5,  7,  1,  9,  7,  8,  9,
+    10, 8,  4,  10, 8,  4,  10, 7,  3,  2,  1,  9,  10, 8,  4,  10, 8,  4,  8,
+    7,  0,  0,  0,  10, 4,  11, 0,  0,  0,  0,  0,  0,  0,  0,  0,  10, 4,  11,
+    1,  2,  3,  0,  0,  0,  0,  0,  0,  5,  11, 1,  11, 1,  10, 0,  0,  0,  0,
+    0,  0,  10, 2,  11, 3,  2,  11, 3,  11, 5,  0,  0,  0,  7,  5,  6,  4,  11,
+    10, 0,  0,  0,  0,  0,  0,  3,  2,  1,  11, 4,  10, 5,  7,  6,  0,  0,  0,
+    7,  11, 6,  10, 11, 6,  10, 6,  1,  0,  0,  0,  7,  6,  3,  7,  11, 3,  2,
+    11, 3,  2,  11, 10, 10, 4,  11, 6,  8,  3,  0,  0,  0,  0,  0,  0,  6,  1,
+    8,  1,  8,  2,  11, 4,  10, 0,  0,  0,  10, 1,  11, 1,  11, 5,  8,  3,  6,
+    0,  0,  0,  10, 8,  5,  10, 11, 5,  6,  8,  5,  10, 8,  2,  8,  7,  3,  7,
+    3,  5,  10, 11, 4,  0,  0,  0,  10, 11, 2,  7,  11, 2,  7,  11, 8,  1,  4,
+    5,  7,  11, 8,  1,  11, 8,  1,  11, 10, 1,  3,  8,  10, 11, 2,  7,  11, 2,
+    7,  2,  8,  0,  0,  0,  11, 9,  4,  9,  4,  2,  0,  0,  0,  0,  0,  0,  1,
+    4,  3,  11, 4,  3,  11, 3,  9,  0,  0,  0,  2,  1,  9,  5,  1,  9,  5,  9,
+    11, 0,  0,  0,  3,  5,  9,  11, 5,  9,  0,  0,  0,  0,  0,  0,  2,  4,  9,
+    4,  9,  11, 6,  5,  7,  0,  0,  0,  7,  6,  11, 3,  6,  11, 3,  6,  9,  4,
+    5,  1,  7,  1,  9,  7,  11, 9,  2,  1,  9,  7,  1,  6,  7,  6,  11, 3,  6,
+    11, 3,  11, 9,  0,  0,  0,  11, 9,  4,  9,  4,  2,  6,  8,  3,  0,  0,  0,
+    1,  4,  6,  9,  4,  6,  9,  4,  11, 9,  8,  6,  6,  8,  5,  9,  8,  5,  9,
+    8,  11, 1,  3,  2,  6,  8,  5,  9,  8,  5,  9,  5,  11, 0,  0,  0,  7,  11,
+    9,  7,  9,  9,  5,  4,  2,  5,  2,  2,  9,  11, 8,  11, 8,  7,  1,  4,  5,
+    0,  0,  0,  7,  8,  11, 8,  11, 9,  1,  3,  2,  0,  0,  0,  9,  11, 8,  11,
+    8,  7,  0,  0,  0,  0,  0,  0,  11, 7,  12, 0,  0,  0,  0,  0,  0,  0,  0,
+    0,  11, 7,  12, 3,  2,  1,  0,  0,  0,  0,  0,  0,  11, 7,  12, 5,  4,  1,
+    0,  0,  0,  0,  0,  0,  3,  5,  2,  5,  2,  4,  12, 7,  11, 0,  0,  0,  11,
+    5,  12, 5,  12, 6,  0,  0,  0,  0,  0,  0,  11, 5,  12, 5,  12, 6,  2,  1,
+    3,  0,  0,  0,  11, 4,  12, 1,  4,  12, 1,  12, 6,  0,  0,  0,  11, 2,  6,
+    11, 12, 6,  3,  2,  6,  11, 2,  4,  7,  12, 11, 8,  6,  3,  0,  0,  0,  0,
+    0,  0,  2,  8,  1,  8,  1,  6,  11, 12, 7,  0,  0,  0,  1,  4,  5,  12, 7,
+    11, 6,  8,  3,  0,  0,  0,  11, 12, 4,  8,  12, 4,  8,  12, 2,  5,  7,  6,
+    8,  12, 3,  11, 12, 3,  11, 3,  5,  0,  0,  0,  8,  12, 2,  5,  12, 2,  5,
+    12, 11, 5,  1,  2,  8,  3,  1,  8,  12, 1,  4,  12, 1,  4,  12, 11, 11, 12,
+    4,  8,  12, 4,  8,  4,  2,  0,  0,  0,  12, 11, 7,  10, 9,  2,  0,  0,  0,
+    0,  0,  0,  1,  10, 3,  10, 3,  9,  7,  11, 12, 0,  0,  0,  12, 7,  11, 1,
+    4,  5,  10, 2,  9,  0,  0,  0,  12, 7,  9,  5,  7,  9,  5,  7,  3,  10, 11,
+    4,  6,  12, 5,  12, 5,  11, 2,  9,  10, 0,  0,  0,  12, 9,  3,  12, 3,  3,
+    11, 10, 1,  11, 1,  1,  11, 4,  12, 1,  4,  12, 1,  4,  6,  9,  10, 2,  3,
+    9,  6,  9,  6,  12, 4,  10, 11, 0,  0,  0,  3,  6,  8,  11, 12, 7,  9,  10,
+    2,  0,  0,  0,  7,  11, 6,  10, 11, 6,  10, 11, 1,  8,  12, 9,  12, 8,  9,
+    6,  7,  5,  1,  2,  3,  6,  7,  5,  9,  8,  12, 5,  7,  6,  11, 4,  10, 0,
+    0,  0,  8,  12, 3,  11, 12, 3,  11, 12, 5,  2,  9,  10, 5,  11, 1,  11, 1,
+    10, 8,  12, 9,  0,  0,  0,  8,  12, 9,  4,  10, 11, 2,  1,  3,  0,  0,  0,
+    11, 10, 4,  9,  12, 8,  0,  0,  0,  0,  0,  0,  12, 10, 7,  10, 7,  4,  0,
+    0,  0,  0,  0,  0,  12, 10, 7,  10, 7,  4,  3,  2,  1,  0,  0,  0,  5,  7,
+    1,  12, 7,  1,  12, 1,  10, 0,  0,  0,  12, 7,  10, 3,  7,  10, 3,  7,  5,
+    3,  2,  10, 4,  5,  10, 6,  5,  10, 6,  10, 12, 0,  0,  0,  4,  5,  10, 6,
+    5,  10, 6,  5,  12, 2,  1,  3,  12, 6,  10, 1,  6,  10, 0,  0,  0,  0,  0,
+    0,  3,  2,  6,  10, 2,  6,  10, 6,  12, 0,  0,  0,  4,  7,  10, 7,  10, 12,
+    3,  6,  8,  0,  0,  0,  6,  8,  2,  6,  2,  2,  7,  12, 10, 7,  10, 10, 5,
+    7,  1,  12, 7,  1,  12, 7,  10, 3,  6,  8,  10, 12, 2,  12, 2,  8,  5,  7,
+    6,  0,  0,  0,  4,  12, 3,  4,  5,  3,  8,  12, 3,  4,  12, 10, 8,  2,  12,
+    2,  12, 10, 5,  1,  4,  0,  0,  0,  8,  3,  12, 1,  3,  12, 1,  12, 10, 0,
+    0,  0,  10, 12, 2,  12, 2,  8,  0,  0,  0,  0,  0,  0,  12, 9,  7,  2,  9,
+    7,  2,  7,  4,  0,  0,  0,  12, 4,  3,  12, 9,  3,  1,  4,  3,  12, 4,  7,
+    2,  1,  5,  2,  9,  5,  7,  9,  5,  7,  9,  12, 12, 7,  9,  5,  7,  9,  5,
+    9,  3,  0,  0,  0,  2,  9,  4,  6,  9,  4,  6,  9,  12, 6,  5,  4,  12, 6,
+    9,  6,  9,  3,  4,  5,  1,  0,  0,  0,  2,  9,  1,  12, 9,  1,  12, 1,  6,
+    0,  0,  0,  3,  9,  6,  9,  6,  12, 0,  0,  0,  0,  0,  0,  12, 9,  7,  2,
+    9,  7,  2,  9,  4,  6,  8,  3,  1,  6,  4,  6,  4,  7,  9,  8,  12, 0,  0,
+    0,  5,  7,  6,  9,  8,  12, 3,  2,  1,  0,  0,  0,  12, 8,  9,  6,  7,  5,
+    0,  0,  0,  0,  0,  0,  4,  2,  5,  2,  5,  3,  12, 9,  8,  0,  0,  0,  12,
+    8,  9,  1,  4,  5,  0,  0,  0,  0,  0,  0,  8,  9,  12, 2,  3,  1,  0,  0,
+    0,  0,  0,  0,  12, 8,  9,  0,  0,  0,  0,  0,  0,  0,  0,  0,  12, 8,  9,
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  8,  9,  12, 2,  3,  1,  0,  0,  0,  0,
+    0,  0,  12, 8,  9,  1,  4,  5,  0,  0,  0,  0,  0,  0,  4,  2,  5,  2,  5,
+    3,  12, 9,  8,  0,  0,  0,  12, 8,  9,  6,  7,  5,  0,  0,  0,  0,  0,  0,
+    5,  7,  6,  9,  8,  12, 3,  2,  1,  0,  0,  0,  1,  6,  4,  6,  4,  7,  9,
+    8,  12, 0,  0,  0,  12, 9,  7,  2,  9,  7,  2,  9,  4,  6,  8,  3,  3,  9,
+    6,  9,  6,  12, 0,  0,  0,  0,  0,  0,  2,  9,  1,  12, 9,  1,  12, 1,  6,
+    0,  0,  0,  12, 6,  9,  6,  9,  3,  4,  5,  1,  0,  0,  0,  2,  9,  4,  6,
+    9,  4,  6,  9,  12, 6,  5,  4,  12, 7,  9,  5,  7,  9,  5,  9,  3,  0,  0,
+    0,  2,  1,  5,  2,  9,  5,  7,  9,  5,  7,  9,  12, 12, 4,  3,  12, 9,  3,
+    1,  4,  3,  12, 4,  7,  12, 9,  7,  2,  9,  7,  2,  7,  4,  0,  0,  0,  10,
+    12, 2,  12, 2,  8,  0,  0,  0,  0,  0,  0,  8,  3,  12, 1,  3,  12, 1,  12,
+    10, 0,  0,  0,  8,  2,  12, 2,  12, 10, 5,  1,  4,  0,  0,  0,  4,  12, 3,
+    4,  5,  3,  8,  12, 3,  4,  12, 10, 10, 12, 2,  12, 2,  8,  5,  7,  6,  0,
+    0,  0,  5,  7,  1,  12, 7,  1,  12, 7,  10, 3,  6,  8,  6,  8,  2,  6,  2,
+    2,  7,  12, 10, 7,  10, 10, 4,  7,  10, 7,  10, 12, 3,  6,  8,  0,  0,  0,
+    3,  2,  6,  10, 2,  6,  10, 6,  12, 0,  0,  0,  12, 6,  10, 1,  6,  10, 0,
+    0,  0,  0,  0,  0,  4,  5,  10, 6,  5,  10, 6,  5,  12, 2,  1,  3,  4,  5,
+    10, 6,  5,  10, 6,  10, 12, 0,  0,  0,  12, 7,  10, 3,  7,  10, 3,  7,  5,
+    3,  2,  10, 5,  7,  1,  12, 7,  1,  12, 1,  10, 0,  0,  0,  12, 10, 7,  10,
+    7,  4,  3,  2,  1,  0,  0,  0,  12, 10, 7,  10, 7,  4,  0,  0,  0,  0,  0,
+    0,  11, 10, 4,  9,  12, 8,  0,  0,  0,  0,  0,  0,  8,  12, 9,  4,  10, 11,
+    2,  1,  3,  0,  0,  0,  5,  11, 1,  11, 1,  10, 8,  12, 9,  0,  0,  0,  8,
+    12, 3,  11, 12, 3,  11, 12, 5,  2,  9,  10, 9,  8,  12, 5,  7,  6,  11, 4,
+    10, 0,  0,  0,  12, 8,  9,  6,  7,  5,  1,  2,  3,  6,  7,  5,  7,  11, 6,
+    10, 11, 6,  10, 11, 1,  8,  12, 9,  3,  6,  8,  11, 12, 7,  9,  10, 2,  0,
+    0,  0,  3,  9,  6,  9,  6,  12, 4,  10, 11, 0,  0,  0,  11, 4,  12, 1,  4,
+    12, 1,  4,  6,  9,  10, 2,  12, 9,  3,  12, 3,  3,  11, 10, 1,  11, 1,  1,
+    6,  12, 5,  12, 5,  11, 2,  9,  10, 0,  0,  0,  12, 7,  9,  5,  7,  9,  5,
+    7,  3,  10, 11, 4,  12, 7,  11, 1,  4,  5,  10, 2,  9,  0,  0,  0,  1,  10,
+    3,  10, 3,  9,  7,  11, 12, 0,  0,  0,  12, 11, 7,  10, 9,  2,  0,  0,  0,
+    0,  0,  0,  11, 12, 4,  8,  12, 4,  8,  4,  2,  0,  0,  0,  8,  3,  1,  8,
+    12, 1,  4,  12, 1,  4,  12, 11, 8,  12, 2,  5,  12, 2,  5,  12, 11, 5,  1,
+    2,  8,  12, 3,  11, 12, 3,  11, 3,  5,  0,  0,  0,  11, 12, 4,  8,  12, 4,
+    8,  12, 2,  5,  7,  6,  1,  4,  5,  12, 7,  11, 6,  8,  3,  0,  0,  0,  2,
+    8,  1,  8,  1,  6,  11, 12, 7,  0,  0,  0,  7,  12, 11, 8,  6,  3,  0,  0,
+    0,  0,  0,  0,  11, 2,  6,  11, 12, 6,  3,  2,  6,  11, 2,  4,  11, 4,  12,
+    1,  4,  12, 1,  12, 6,  0,  0,  0,  11, 5,  12, 5,  12, 6,  2,  1,  3,  0,
+    0,  0,  11, 5,  12, 5,  12, 6,  0,  0,  0,  0,  0,  0,  3,  5,  2,  5,  2,
+    4,  12, 7,  11, 0,  0,  0,  11, 7,  12, 5,  4,  1,  0,  0,  0,  0,  0,  0,
+    11, 7,  12, 3,  2,  1,  0,  0,  0,  0,  0,  0,  11, 7,  12, 0,  0,  0,  0,
+    0,  0,  0,  0,  0,  9,  11, 8,  11, 8,  7,  0,  0,  0,  0,  0,  0,  7,  8,
+    11, 8,  11, 9,  1,  3,  2,  0,  0,  0,  9,  11, 8,  11, 8,  7,  1,  4,  5,
+    0,  0,  0,  7,  11, 9,  7,  9,  9,  5,  4,  2,  5,  2,  2,  6,  8,  5,  9,
+    8,  5,  9,  5,  11, 0,  0,  0,  6,  8,  5,  9,  8,  5,  9,  8,  11, 1,  3,
+    2,  1,  4,  6,  9,  4,  6,  9,  4,  11, 9,  8,  6,  11, 9,  4,  9,  4,  2,
+    6,  8,  3,  0,  0,  0,  7,  6,  11, 3,  6,  11, 3,  11, 9,  0,  0,  0,  7,
+    1,  9,  7,  11, 9,  2,  1,  9,  7,  1,  6,  7,  6,  11, 3,  6,  11, 3,  6,
+    9,  4,  5,  1,  2,  4,  9,  4,  9,  11, 6,  5,  7,  0,  0,  0,  3,  5,  9,
+    11, 5,  9,  0,  0,  0,  0,  0,  0,  2,  1,  9,  5,  1,  9,  5,  9,  11, 0,
+    0,  0,  1,  4,  3,  11, 4,  3,  11, 3,  9,  0,  0,  0,  11, 9,  4,  9,  4,
+    2,  0,  0,  0,  0,  0,  0,  10, 11, 2,  7,  11, 2,  7,  2,  8,  0,  0,  0,
+    7,  11, 8,  1,  11, 8,  1,  11, 10, 1,  3,  8,  10, 11, 2,  7,  11, 2,  7,
+    11, 8,  1,  4,  5,  8,  7,  3,  7,  3,  5,  10, 11, 4,  0,  0,  0,  10, 8,
+    5,  10, 11, 5,  6,  8,  5,  10, 8,  2,  10, 1,  11, 1,  11, 5,  8,  3,  6,
+    0,  0,  0,  6,  1,  8,  1,  8,  2,  11, 4,  10, 0,  0,  0,  10, 4,  11, 6,
+    8,  3,  0,  0,  0,  0,  0,  0,  7,  6,  3,  7,  11, 3,  2,  11, 3,  2,  11,
+    10, 7,  11, 6,  10, 11, 6,  10, 6,  1,  0,  0,  0,  3,  2,  1,  11, 4,  10,
+    5,  7,  6,  0,  0,  0,  7,  5,  6,  4,  11, 10, 0,  0,  0,  0,  0,  0,  10,
+    2,  11, 3,  2,  11, 3,  11, 5,  0,  0,  0,  5,  11, 1,  11, 1,  10, 0,  0,
+    0,  0,  0,  0,  10, 4,  11, 1,  2,  3,  0,  0,  0,  0,  0,  0,  10, 4,  11,
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  9,  10, 8,  4,  10, 8,  4,  8,  7,  0,
+    0,  0,  9,  10, 8,  4,  10, 8,  4,  10, 7,  3,  2,  1,  9,  7,  1,  9,  10,
+    1,  5,  7,  1,  9,  7,  8,  5,  3,  7,  3,  7,  8,  10, 2,  9,  0,  0,  0,
+    4,  5,  6,  4,  10, 6,  8,  10, 6,  8,  10, 9,  6,  8,  3,  10, 2,  9,  1,
+    4,  5,  0,  0,  0,  9,  8,  10, 6,  8,  10, 6,  10, 1,  0,  0,  0,  9,  2,
+    10, 3,  8,  6,  0,  0,  0,  0,  0,  0,  4,  10, 7,  3,  10, 7,  3,  10, 9,
+    3,  6,  7,  7,  4,  6,  4,  6,  1,  9,  10, 2,  0,  0,  0,  9,  3,  10, 3,
+    10, 1,  7,  6,  5,  0,  0,  0,  9,  2,  10, 5,  7,  6,  0,  0,  0,  0,  0,
+    0,  4,  10, 5,  9,  10, 5,  9,  5,  3,  0,  0,  0,  4,  1,  5,  2,  10, 9,
+    0,  0,  0,  0,  0,  0,  9,  3,  10, 3,  10, 1,  0,  0,  0,  0,  0,  0,  9,
+    2,  10, 0,  0,  0,  0,  0,  0,  0,  0,  0,  8,  7,  2,  4,  7,  2,  0,  0,
+    0,  0,  0,  0,  1,  3,  4,  8,  3,  4,  8,  4,  7,  0,  0,  0,  5,  1,  7,
+    2,  1,  7,  2,  7,  8,  0,  0,  0,  5,  3,  7,  3,  7,  8,  0,  0,  0,  0,
+    0,  0,  6,  5,  8,  4,  5,  8,  4,  8,  2,  0,  0,  0,  6,  3,  8,  1,  5,
+    4,  0,  0,  0,  0,  0,  0,  6,  1,  8,  1,  8,  2,  0,  0,  0,  0,  0,  0,
+    3,  8,  6,  0,  0,  0,  0,  0,  0,  0,  0,  0,  3,  6,  2,  7,  6,  2,  7,
+    2,  4,  0,  0,  0,  7,  4,  6,  4,  6,  1,  0,  0,  0,  0,  0,  0,  5,  6,
+    7,  3,  1,  2,  0,  0,  0,  0,  0,  0,  5,  6,  7,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  3,  5,  2,  5,  2,  4,  0,  0,  0,  0,  0,  0,  4,  1,  5,  0,
+    0,  0,  0,  0,  0,  0,  0,  0,  1,  2,  3,  0,  0,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+};
+
+void main(void) {	
+    vec4 base = gl_in[0].gl_Position;
+    int index = varIndex[0] * 12;
+    for(int i = 0; i < 12; i += 3) {
+        for(int k = 0; k < 3; k++) {
+            gl_Position = proj * view * (base + vec4(vectors[table[index + i + k]], 0.0));
+            varTextureG = varTexture[0];
+            EmitVertex();
+        }
+        EndPrimitive();
+    }
+}

resources/vertex.vs

@@ -1,15 +1,30 @@
 #version 430
 
-uniform mat4 proj;
-uniform mat4 view;
+layout (binding = 0) uniform sampler3D samp;
 
 out vec3 varTexture;
+out int varIndex;
+
+const float step = 1.0 / 15.0;
 
 void main(void) { 
     int id = gl_VertexID;
     int x = id & 0xF;
     int y = (id >> 4) & 0xF;
     int z = (id >> 8) & 0xF;
-    gl_Position =  proj * view * vec4(x, y, z, 1.0);
-    varTexture = vec3(x, y, z) * (1.0 / 15.0);
+
+    vec3 xyz = vec3(x, y, z);
+    gl_Position = vec4(xyz, 1.0);
+    varTexture = xyz * step;
+
+    int b1 = int(texture(samp, varTexture).r < 0.5f);
+    int b2 = int(texture(samp, varTexture + vec3(step, 0.0, 0.0)).r < 0.5f);
+    int b3 = int(texture(samp, varTexture + vec3(step, 0.0, step)).r < 0.5f);
+    int b4 = int(texture(samp, varTexture + vec3(0.0, 0.0, step)).r < 0.5f);
+    int b5 = int(texture(samp, varTexture + vec3(0.0, step, 0.0)).r < 0.5f);
+    int b6 = int(texture(samp, varTexture + vec3(step, step, 0.0)).r < 0.5f);
+    int b7 = int(texture(samp, varTexture + vec3(step, step, step)).r < 0.5f);
+    int b8 = int(texture(samp, varTexture + vec3(0.0, step, step)).r < 0.5f);
+    varIndex = (b1 << 7) | (b2 << 6) | (b3 << 5) | (b4 << 4) | 
+               (b5 << 3) | (b6 << 2) | (b7 << 1) | b8;
 }