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-# π οΈ Circuit Diagram Builder
-Welcome to Circuit Diagram Builder, a project developed in C++ as part of my Introduction to Programming Course during my Bachelor's studies.
+# Circuit Diagram Builder
-## π Description
-This project allows you to create and visualize electronic circuits using a graphical user interface. You can add different components such as resistors, capacitors, and LEDs, and connect them using wires to create a functioning circuit.
+**A C++/WinBGIm desktop prototype for arranging and connecting electronic schematic symbols on a graphical canvas.**
-Please note that this project is still in development and does not yet have a simulation feature.
+
+
+
-## π Getting Started
-To use this project, you will need to have Code::Blocks installed with the [WinBGIm](https://home.cs.colorado.edu/~main/bgi/dev-c++/) library.
+
+
+
+
+
+
+
-### Building From Source (using Code::Blocks)
-To get started with this project, follow these steps:
+## Overview
-1. Clone this repository to your local machine.
-2. Open the [Electron.cbp](https://github.com/BobuDragos/Circuit-Diagram-Builder/blob/main/Electron/Electron.cbp) file with Code::Blocks.
-3. Build and run the project.
+Circuit Diagram Builderβinternally titled **Electron**βis an educational desktop application for constructing schematic diagrams. Users select electronic symbols from a menu, rotate and position them, then connect their terminals with routed lines.
-### Windows Executable
-If you just want to execute the software, you can find [this Windows executable](https://github.com/BobuDragos/Circuit-Diagram-Builder/blob/main/Electron/bin/Debug/Electron%20prof.exe) under `Bin/Debug`.
+The project focuses on graphical editing and interaction. It does **not** simulate current, voltage, logic states or electrical behaviour.
-### Linux Building from Source
-You'll have to build the [c++ Source Code](https://github.com/BobuDragos/Circuit-Diagram-Builder/blob/main/Electron/unitedCode.cpp) using `gcc`
+## What the application supports
-If you encounter any issues, feel free to open an issue in the repository.
-## π License
-This project is released under the GNU General Public License v3.0.
+- Full-screen WinBGIm graphical interface.
+- Menu of reusable electronic symbols.
+- Data-driven symbol descriptions loaded from `.PS` files.
+- Placement of multiple instances on a drawing canvas.
+- Four-way symbol rotation.
+- Connection points attached to symbols.
+- Orthogonal wire drawing between terminals.
+- Automatic creation of an intermediate node when a connection ends away from an existing terminal.
+- Moving already placed components.
+- Zooming symbols in and out.
+- Audible feedback for editing actions.
+- Debug and release targets in a Code::Blocks project.
-Enjoy exploring the world of circuit design with Circuit Diagram Builder! π
+## Included component types
-## π€ Contact
-If you have any questions about this repository or would like to get in touch with Dragos A. Bobu, feel free to reach out to his [email](mailto:bobudragos0@gmail.com?subject=[GitHub]CircuitDiagram%20Interest) or [website](https://bobudragos.github.io/).
+The Code::Blocks project includes definition files for:
+
+| Definition file | Intended symbol |
+|---|---|
+| `AMPLOP.PS` | Operational amplifier |
+| `BATERIE.PS` | Battery |
+| `CONDENS.PS` | Capacitor |
+| `DIODA.PS` | Diode |
+| `NOD.PS` | Connection node |
+| `POLARIZ.PS` | Polarised component/source |
+| `REZIST.PS` | Resistor |
+| `SERVOMOT.PS` | Servo motor |
+| `SINU.PS` | Sinusoidal source |
+| `STOP.PS` | Stop/indicator component |
+| `TRANZNPN.PS` | NPN transistor |
+| `TRANZPNP.PS` | PNP transistor |
+| `ZENNER.PS` | Zener diode |
+
+The labels are inherited from the original Romanian implementation.
+
+## User workflow
+
+```mermaid
+flowchart LR
+ Menu[Component menu]
+ Select[Select symbol]
+ Rotate[Right-click to rotate]
+ Place[Left-click to place]
+ Terminal[Select a terminal]
+ Destination[Select destination terminal]
+ Wire[Draw orthogonal wire]
+ Edit[Move or zoom components]
+
+ Menu --> Select --> Rotate --> Place
+ Place --> Terminal --> Destination --> Wire
+ Wire --> Edit
+ Edit --> Select
+```
+
+### Place a component
+
+1. Open the create/editor view.
+2. Left-click a component in the menu.
+3. While positioning it, right-click to rotate it.
+4. Left-click the canvas to place it.
+
+### Connect components
+
+1. Left-click near a connection point on a placed component.
+2. Move the pointer; the application previews a routed line.
+3. Left-click a connection point on another component.
+4. The connection is stored and rendered.
+
+When the destination does not match an existing component terminal, the current implementation may add a node at the clicked position.
+
+### Move a component
+
+Right-click near an already placed component, then reposition it through the placement workflow.
+
+### Zoom
+
+- Double right-click: increase symbol zoom.
+- Double left-click: decrease symbol zoom.
+
+The zoom operation redraws existing pieces at the new scale.
+
+## Architecture
+
+```mermaid
+flowchart TD
+ Project[Electron.cbp]
+ App[unitedCode.cpp]
+ Definitions[*.PS symbol definitions]
+ Menu[Symbol menu]
+ PieceState[Placed-piece array]
+ Connections[Connection array]
+ WinBGIm[WinBGIm / graphics.h]
+ Canvas[Desktop canvas]
+
+ Project --> App
+ Definitions --> App
+ App --> Menu
+ App --> PieceState
+ App --> Connections
+ App --> WinBGIm
+ WinBGIm --> Canvas
+```
+
+## Data model
+
+The single source file defines compact C-style structures:
+
+### `piesa` β component instance
+
+Stores:
+
+- numeric identifier;
+- instance frequency/count;
+- name and display content;
+- canvas position;
+- orientation;
+- connection points;
+- a drawing description.
+
+### `descriere` β drawing instructions
+
+Stores a command list and coordinate pairs. Symbol-definition files are loaded into this structure and rendered through primitives such as lines and rectangles.
+
+### `legatura` β connection
+
+Stores:
+
+- the two component/node identifiers;
+- the selected terminal index on each endpoint;
+- a connection type field reserved for future use.
+
+### Fixed-capacity storage
+
+The implementation uses fixed-size global arrays for menu entries, placed pieces, nodes and connections. This keeps the introductory-programming implementation straightforward but places hard limits on document size.
+
+## Repository structure
+
+```text
+Circuit-Diagram-Builder/
+βββ Electron/
+β βββ Electron.cbp # Code::Blocks project
+β βββ unitedCode.cpp # Application source
+β βββ *.PS # Component drawing definitions
+β βββ bin/
+β β βββ Debug/
+β β βββ Release/
+β βββ obj/ # Generated object files
+βββ docs/
+β βββ editor-workflow.svg
+βββ LICENSE
+βββ README.md
+```
+
+## Recommended platform
+
+The application is strongly Windows-specific because it uses:
+
+- `winbgim.h`;
+- `graphics.h`;
+- Windows mouse event constants such as `WM_LBUTTONDOWN`;
+- `GetSystemMetrics`;
+- `Beep`;
+- a Code::Blocks GNU compiler configuration.
+
+The most reliable path is Windows with Code::Blocks and a correctly configured WinBGIm toolchain.
+
+## Build with Code::Blocks
+
+### Prerequisites
+
+- Windows.
+- Code::Blocks with a MinGW/GCC compiler.
+- WinBGIm headers and libraries configured for that compiler.
+
+### Steps
+
+```bash
+git clone https://github.com/Machine-Learning-Compatible-Game-Engine/Circuit-Diagram-Builder.git
+```
+
+Then:
+
+1. Open `Electron/Electron.cbp` in Code::Blocks.
+2. Confirm that `winbgim.h` and `graphics.h` are visible to the compiler.
+3. Confirm that the required BGI libraries are linked by the Code::Blocks toolchain configuration.
+4. Select the `Debug` or `Release` target.
+5. Build and run.
+
+The project declares:
+
+- Debug output: `Electron/bin/Debug/Electron prof.exe`
+- Release output: `Electron/bin/Release/Electron prof.exe`
+
+The component `.PS` files must remain available in the working directory expected by the executable because the application opens them by relative filename.
+
+## Run the committed Windows executable
+
+A historical debug executable is stored at:
+
+```text
+Electron/bin/Debug/Electron prof.exe
+```
+
+Run executables committed to source repositories only after reviewing their provenance. Building from source is preferable.
+
+## Why a direct Linux build is not currently portable
+
+The previous README suggested compiling the source with GCC on Linux. In practice, ordinary Linux GCC is insufficient because the program depends on Windows APIs and WinBGIm-specific event handling.
+
+A portable Linux version would require replacing or abstracting:
+
+- WinBGIm drawing and window management;
+- Windows mouse constants;
+- screen-size detection;
+- sound feedback;
+- executable and project configuration.
+
+Suitable replacement options could include SDL2, SFML, raylib or Qt.
+
+## Symbol-definition format
+
+Each component is loaded from a file named after its internal symbol name with a `.ps`/`.PS` extension. The current parser reads:
+
+1. symbol name;
+2. number of connection points;
+3. coordinates for each terminal;
+4. display content;
+5. number of drawing commands;
+6. command letters and coordinate pairs.
+
+This allows symbols to be changed without recompiling the C++ source, but the format is positional and undocumented beyond the parser.
+
+A future schema should define:
+
+- formal command names;
+- versioning;
+- validation errors;
+- coordinate units;
+- supported primitives;
+- arbitrary terminal counts;
+- metadata such as category and electrical type.
+
+## Current rendering model
+
+The editor uses immediate drawing calls and redraws pieces manually. Rotations transform each stored point through repeated 90-degree coordinate changes. Connections are displayed as three orthogonal line segments:
+
+```text
+endpoint A β horizontal midpoint β vertical segment β endpoint B
+```
+
+This keeps wires visually structured without implementing a full routing algorithm.
+
+## Known limitations
+
+- No electrical simulation.
+- No circuit-rule validation.
+- No voltage/current/source model.
+- No undo/redo system.
+- Fixed-size arrays cap the number of pieces and connections.
+- The entire application is concentrated in one large source file.
+- Global mutable state is used throughout.
+- File parsing lacks robust error handling and schema validation.
+- The code assumes every definition file exists and is correctly formatted.
+- Symbol rotation logic duplicates transformations for each drawing primitive.
+- Wire routing is only midpoint-based and does not avoid obstacles.
+- Connections do not automatically follow all component moves reliably without a more explicit graph/redraw model.
+- The connection type field is unused.
+- Windows-specific APIs prevent a straightforward Linux build.
+- Generated object files and executables are committed.
+- There is no automated test suite or CI build.
+- Existing binaries may not run on every modern Windows environment.
+
+## Recommended next steps
+
+1. Separate model, rendering, input and persistence code into modules.
+2. Introduce dynamic containers such as `std::vector`.
+3. Define and validate a versioned component-description format.
+4. Replace WinBGIm with a maintained cross-platform UI or graphics framework.
+5. Add a scene graph where wires reference component terminal identifiers.
+6. Recompute wire endpoints whenever a component moves or rotates.
+7. Add selection, deletion, undo and redo.
+8. Add save/load using a documented project format.
+9. Add grid snapping and obstacle-aware wire routing.
+10. Treat simulation as a separate subsystem after the editor model is reliable.
+11. Remove generated binaries and build artefacts from version control.
+12. Add screenshots from a freshly built version and automated Windows builds.
+
+## Project context
+
+The project originated in an introductory university programming course. Its main value is demonstrating how a graphical editor can be assembled from basic structures, file parsing, mouse events, geometry transformations and drawing primitives.
+
+## Licence
+
+The repository contains a GNU General Public License v3.0 licence. Redistribution and derivative work must comply with that licence.
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+
