Better tree layout

core/src/mindustry/content/TechTree.java

@@ -73,6 +73,12 @@ public class TechTree implements ContentList{
                 });
             });
 
+            node(coreFoundation, () -> {
+                node(coreNucleus, () -> {
+
+                });
+            });
+
             node(mechanicalDrill, () -> {
 
                 node(mechanicalPump, () -> {
@@ -255,6 +261,81 @@ public class TechTree implements ContentList{
 
                                 });
                             });
+                        });
+                    });
+                });
+            });
+
+            node(duo, () -> {
+                node(copperWall, () -> {
+                    node(copperWallLarge, () -> {
+                        node(titaniumWall, () -> {
+                            node(titaniumWallLarge);
+
+                            node(door, () -> {
+                                node(doorLarge);
+                            });
+                            node(plastaniumWall, () -> {
+                                node(plastaniumWallLarge, () -> {
+
+                                });
+                            });
+                            node(thoriumWall, () -> {
+                                node(thoriumWallLarge);
+                                node(surgeWall, () -> {
+                                    node(surgeWallLarge);
+                                    node(phaseWall, () -> {
+                                        node(phaseWallLarge);
+                                    });
+                                });
+                            });
+                        });
+                    });
+                });
+
+                node(scatter, () -> {
+                    node(hail, () -> {
+
+                        node(salvo, () -> {
+                            node(swarmer, () -> {
+                                node(cyclone, () -> {
+                                    node(spectre, () -> {
+
+                                    });
+                                });
+                            });
+
+                            node(ripple, () -> {
+                                node(fuse, () -> {
+
+                                });
+                            });
+                        });
+                    });
+                });
+
+                node(scorch, () -> {
+                    node(arc, () -> {
+                        node(wave, () -> {
+                            node(parallax, () -> {
+                                node(segment, () -> {
+
+                                });
+                            });
+                        });
+
+                        node(lancer, () -> {
+                            node(meltdown, () -> {
+
+                            });
+
+                            node(shockMine, () -> {
+
+                            });
+                        });
+                    });
+                });
+            });
 
             node(groundFactory, () -> {
                 node(dagger, () -> {
@@ -323,88 +404,6 @@ public class TechTree implements ContentList{
                 });
             });
         });
-                    });
-                });
-            });
-
-            node(coreFoundation, () -> {
-                node(coreNucleus, () -> {
-
-                });
-            });
-
-            node(duo, () -> {
-                node(scatter, () -> {
-                    node(hail, () -> {
-
-                        node(salvo, () -> {
-                            node(swarmer, () -> {
-                                node(cyclone, () -> {
-                                    node(spectre, () -> {
-
-                                    });
-                                });
-                            });
-
-                            node(ripple, () -> {
-                                node(fuse, () -> {
-
-                                });
-                            });
-                        });
-                    });
-                });
-
-                node(scorch, () -> {
-                    node(arc, () -> {
-                        node(wave, () -> {
-                            node(parallax, () -> {
-                                node(segment, () -> {
-
-                                });
-                            });
-                        });
-
-                        node(lancer, () -> {
-                            node(meltdown, () -> {
-
-                            });
-
-                            node(shockMine, () -> {
-
-                            });
-                        });
-                    });
-                });
-
-
-                node(copperWall, () -> {
-                    node(copperWallLarge, () -> {
-                        node(titaniumWall, () -> {
-                            node(titaniumWallLarge);
-
-                            node(door, () -> {
-                                node(doorLarge);
-                            });
-                            node(plastaniumWall, () -> {
-                                node(plastaniumWallLarge, () -> {
-
-                                });
-                            });
-                            node(thoriumWall, () -> {
-                                node(thoriumWallLarge);
-                                node(surgeWall, () -> {
-                                    node(surgeWallLarge);
-                                    node(phaseWall, () -> {
-                                        node(phaseWallLarge);
-                                    });
-                                });
-                            });
-                        });
-                    });
-                });
-            });
-        });
     }
 
     private static TechNode node(UnlockableContent content, Runnable children){

core/src/mindustry/ui/dialogs/ResearchDialog.java

@@ -416,13 +416,16 @@ public class ResearchDialog extends BaseDialog{
         public void drawChildren(){
             clamp();
             float offsetX = panX + width / 2f, offsetY = panY + height / 2f;
+            Draw.sort(true);
 
             for(TechTreeNode node : nodes){
                 if(!node.visible) continue;
                 for(TechTreeNode child : node.children){
                     if(!child.visible) continue;
+                    boolean lock = locked(node.node) || locked(child.node);
+                    Draw.z(lock ? 1f : 2f);
 
-                    Lines.stroke(Scl.scl(4f), locked(node.node) || locked(child.node) ? Pal.gray : Pal.accent);
+                    Lines.stroke(Scl.scl(4f), lock ? Pal.gray : Pal.accent);
                     Draw.alpha(parentAlpha);
                     if(Mathf.equal(Math.abs(node.y - child.y), Math.abs(node.x - child.x), 1f) && Mathf.dstm(node.x, node.y, child.x, child.y) <= node.width*3){
                         Lines.line(node.x + offsetX, node.y + offsetY, child.x + offsetX, child.y + offsetY);
@@ -433,6 +436,7 @@ public class ResearchDialog extends BaseDialog{
                 }
             }
 
+            Draw.sort(false);
             Draw.reset();
             super.drawChildren();
         }