fix depth buffer creation

src/main.cpp

@@ -757,7 +757,7 @@ int main(int argc, char** argv)
     pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
     pfd.iPixelType = PFD_TYPE_RGBA;
     pfd.cColorBits = 32;
-    pfd.cDepthBits = 16;
+    pfd.cDepthBits = 24;
     pfd.iLayerType = PFD_MAIN_PLANE;
 
     hDC = GetDC(hWnd);

src/node_panel_grid.cpp

@@ -218,6 +218,7 @@ void NodePanelGrid::draw_heightmap(const glm::mat4& proj, const glm::mat4& camer
 {
     if (m_groud_opacity->get_value() > 0.f)
     {
+        bool depth = glIsEnabled(GL_DEPTH_TEST);
         glEnable(GL_DEPTH_TEST);
         glClear(GL_DEPTH_BUFFER_BIT);
 
@@ -313,6 +314,7 @@ void NodePanelGrid::draw_heightmap(const glm::mat4& proj, const glm::mat4& camer
                 m_plane.draw_fill();
             }
         }
+        depth ? glEnable(GL_DEPTH_TEST) : glDisable(GL_DEPTH_TEST);
     }
 }
 

src/rtt.cpp

@@ -137,7 +137,7 @@ bool RTT::create(int width, int height, int tex/* = -1*/, GLint internal_format,
     {
         glGenRenderbuffers(1, &rboID);
         glBindRenderbuffer(GL_RENDERBUFFER, rboID);
-        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width, height);
+        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height);
         glBindRenderbuffer(GL_RENDERBUFFER, 0);
     }
 
@@ -151,9 +151,11 @@ bool RTT::create(int width, int height, int tex/* = -1*/, GLint internal_format,
 
     // Attach the texture to FBO color attachment point
     glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texID, 0);
-
-    // Attach the renderbuffer to depth attachment point
-    //glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboID);
+    if (depth_buffer)
+    {
+        // Attach the renderbuffer to depth attachment point
+        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboID);
+    }
 
     auto err2str = [](GLenum err) {
         switch (err)