Enable depth test

src/client/client_imgui.cpp

@@ -82,6 +82,8 @@ int main(int argc, char** argv)
     ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
     float fov = 45.0;
 
+    glEnable(GL_DEPTH_TEST);
+    glDepthFunc(GL_LESS);
     // Required before OpenGL Calls.
     GLuint vertex_array;
     glGenVertexArrays(1, &vertex_array);
@@ -164,7 +166,7 @@ int main(int argc, char** argv)
 
        // Clear GL buffers
        glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
-       glClear(GL_COLOR_BUFFER_BIT);
+       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
        // Render game geometries
        glfwGetWindowSize(window, &window_width, &window_height);

src/client/renderable.hpp

@@ -33,7 +33,7 @@ namespace Renderable {
          if (this->colour_buffer_data != 0) {
             glGenBuffers(1, &this->colour_buffer);
             glBindBuffer(GL_ARRAY_BUFFER, this->colour_buffer);
-            glBufferData(GL_ARRAY_BUFFER, sizeof(this->colour_buffer_data),
+            glBufferData(GL_ARRAY_BUFFER, this->colour_buffer_data_size,
                          this->colour_buffer_data, GL_STATIC_DRAW);
          }
       }
@@ -55,8 +55,8 @@ namespace Renderable {
             0,                  // stride
             (void*)0            // array buffer offset
             );
-         glDrawArrays(GL_TRIANGLES, 0, this->vertex_buffer_data_size / sizeof(GLfloat) / 3); // Starting from vertex 0; 3 vertices total -> 1 triangle
          if (this->colour_buffer == 0) {
+            glDrawArrays(GL_TRIANGLES, 0, this->vertex_buffer_data_size / sizeof(GLfloat) / 3); // Starting from vertex 0; 3 vertices total -> 1 triangle
             glDisableVertexAttribArray(0);
             glUseProgram(0);
             return;
@@ -71,6 +71,7 @@ namespace Renderable {
             0,                                // stride
             (void*)0                          // array buffer offset
             );
+         glDrawArrays(GL_TRIANGLES, 0, this->vertex_buffer_data_size / sizeof(GLfloat) / 3); // Starting from vertex 0; 3 vertices total -> 1 triangle
          glDisableVertexAttribArray(0);
          glDisableVertexAttribArray(1);
          glUseProgram(0);
@@ -132,42 +133,42 @@ namespace Renderable {
       1.0f,-1.0f, 1.0f
    };
    static const GLfloat cube_color[] = {
-      -1.0f,-1.0f,-1.0f, // triangle 1 : begin
-      -1.0f,-1.0f, 1.0f,
-      -1.0f, 1.0f, 1.0f, // triangle 1 : end
-      1.0f, 1.0f,-1.0f, // triangle 2 : begin
-      -1.0f,-1.0f,-1.0f,
-      -1.0f, 1.0f,-1.0f, // triangle 2 : end
-      1.0f,-1.0f, 1.0f,
-      -1.0f,-1.0f,-1.0f,
-      1.0f,-1.0f,-1.0f,
-      1.0f, 1.0f,-1.0f,
-      1.0f,-1.0f,-1.0f,
-      -1.0f,-1.0f,-1.0f,
-      -1.0f,-1.0f,-1.0f,
-      -1.0f, 1.0f, 1.0f,
-      -1.0f, 1.0f,-1.0f,
-      1.0f,-1.0f, 1.0f,
-      -1.0f,-1.0f, 1.0f,
-      -1.0f,-1.0f,-1.0f,
-      -1.0f, 1.0f, 1.0f,
-      -1.0f,-1.0f, 1.0f,
-      1.0f,-1.0f, 1.0f,
-      1.0f, 1.0f, 1.0f,
-      1.0f,-1.0f,-1.0f,
-      1.0f, 1.0f,-1.0f,
-      1.0f,-1.0f,-1.0f,
-      1.0f, 1.0f, 1.0f,
-      1.0f,-1.0f, 1.0f,
-      1.0f, 1.0f, 1.0f,
-      1.0f, 1.0f,-1.0f,
-      -1.0f, 1.0f,-1.0f,
-      1.0f, 1.0f, 1.0f,
-      -1.0f, 1.0f,-1.0f,
-      -1.0f, 1.0f, 1.0f,
-      1.0f, 1.0f, 1.0f,
-      -1.0f, 1.0f, 1.0f,
-      1.0f,-1.0f, 1.0f
+      0.583f,  0.771f,  0.014f,
+      0.609f,  0.115f,  0.436f,
+      0.327f,  0.483f,  0.844f,
+      0.822f,  0.569f,  0.201f,
+      0.435f,  0.602f,  0.223f,
+      0.310f,  0.747f,  0.185f,
+      0.597f,  0.770f,  0.761f,
+      0.559f,  0.436f,  0.730f,
+      0.359f,  0.583f,  0.152f,
+      0.483f,  0.596f,  0.789f,
+      0.559f,  0.861f,  0.639f,
+      0.195f,  0.548f,  0.859f,
+      0.014f,  0.184f,  0.576f,
+      0.771f,  0.328f,  0.970f,
+      0.406f,  0.615f,  0.116f,
+      0.676f,  0.977f,  0.133f,
+      0.971f,  0.572f,  0.833f,
+      0.140f,  0.616f,  0.489f,
+      0.997f,  0.513f,  0.064f,
+      0.945f,  0.719f,  0.592f,
+      0.543f,  0.021f,  0.978f,
+      0.279f,  0.317f,  0.505f,
+      0.167f,  0.620f,  0.077f,
+      0.347f,  0.857f,  0.137f,
+      0.055f,  0.953f,  0.042f,
+      0.714f,  0.505f,  0.345f,
+      0.783f,  0.290f,  0.734f,
+      0.722f,  0.645f,  0.174f,
+      0.302f,  0.455f,  0.848f,
+      0.225f,  0.587f,  0.040f,
+      0.517f,  0.713f,  0.338f,
+      0.053f,  0.959f,  0.120f,
+      0.393f,  0.621f,  0.362f,
+      0.673f,  0.211f,  0.457f,
+      0.820f,  0.883f,  0.371f,
+      0.982f,  0.099f,  0.879f
    };
 
    static const GLfloat triangle_data[] = {