draw on depth buffer for heightmap to remove hidden lines

engine/node_canvas.cpp

@@ -278,6 +278,9 @@ void NodeCanvas::draw()
 
     if (App::I.grid->m_groud_opacity->get_value() > 0.f)
     {
+        glEnable(GL_DEPTH_TEST);
+        glClear(GL_DEPTH_BUFFER_BIT);
+
         // DRAW GRIDS
         ui::ShaderManager::use(kShader::Color);
 
@@ -299,6 +302,9 @@ void NodeCanvas::draw()
             * glm::scale(glm::vec3(grid_scale, grid_scale, 1))
         );
         //m_grid.draw_stroke();
+        glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+        App::I.grid->m_hm_plane.draw_fill();
+        glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
         App::I.grid->m_hm_plane.draw_stroke();
     }