111 lines
7.3 KiB
Markdown
111 lines
7.3 KiB
Markdown
# V Panel — Project Conventions for AI Assistants
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## Project Overview
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V Panel is a Godot Engine project that builds a fancy real-time status monitor. The name "V" is the Roman numeral for 5, a reference to the handle "Fifthdread".
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## Technology
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- **Engine**: Godot 4.x (GDScript)
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- **Rendering**: Forward+ (standard 3D) / Compatibility (for lightweight systems)
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- **UI**: Godot Control nodes, custom Theme, shader-based effects
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## Conventions
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### Code Style
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- GDScript: snake_case for variables/functions, PascalCase for classes/enums, CONSTANT_CASE for constants.
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- Node names: PascalCase, descriptive (e.g., `CpuPanel`, `NetworkGraph`).
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- Signals: past tense verb (e.g., `value_changed`, `panel_resized`).
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- Scene files: PascalCase matching their main script (e.g., `CpuPanel.tscn`).
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- Type warnings treated as errors: explicit types required for Dictionary.get() returns and Variant-inferred variables (`var x: int = dict.key` not `var x := dict.key`).
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### Grid / DashboardGrid
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- `scripts/dashboard_grid.gd` — extends Control, class_name `DashboardGrid`. Uses `gui_input` signal for drag, resize, and double-click events.
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- Modules are direct children of the grid (not cells). Visual cells (`PanelContainer`) are shown only during drag as drop-zone guides.
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- Grid data model: each module stores `grid_col`, `grid_row`, `grid_w`, `grid_h` via `set_meta()`. A 2D `_grid[row][col]` array tracks cell occupancy (supports multi-cell spans).
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- `place_module(module, col, row, span_w=1, span_h=1)` — public API for adding modules with optional span.
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- Drag-and-drop: `_begin_drag` → `_update_drag` → `_end_drag`. Occupancy is cleared during drag and restored on drop. Swaps modules when dropping on occupied cells. Falls back to source position if dropped in grid gap or outside grid bounds (`mouse_exited` safety handler).
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- Resize: `_try_begin_resize` detects clicks within 10px of any module edge. `_update_resize_preview` shows a ghost `ColorRect` at the target span. `_end_resize` commits the new span after overlap check. All 4 edges and corners supported.
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- Double-click: opens `PopupMenu` with shader preset names from `ShaderPresets`. Selection applies all preset params to the module's `ShaderMaterial`.
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- Grid rebuild (`_rebuild_grid`) preserves module metadata (span data lives on modules). Cells are torn down and rebuilt on column/row changes. Orphaned popups cleaned up during rebuild.
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### Shaders
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- `shaders/vial_fill.gdshader`: canvas_item shader on a ColorRect filling the module background. Uses rounded-rect SDF (`rr_sdf`), sum-of-sines water surface with edge damping, and layered effects:
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- **Fill line**: 3 sine waves combined with edge damping (meniscus at walls). `wave_amp` and `wave_freq` uniforms control amplitude and base frequency.
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- **Wave distortion**: UV displacement driven by noise texture + sin.
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- **Ripple rings**: Concentric circular ripples from module center.
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- **Swirl**: UV rotation around center with distance falloff.
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- **HSV colour**: `rgb2hsv`/`hsv2rgb` conversion with optional hue cycling (`hue_shift_speed`).
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- **Top-down lighting**: Subtle brightening at the top of the liquid column.
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- **Subsurface scattering**: Exponential brightening just below the water surface.
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- **Surface foam**: Gaussian-style double-sided falloff (wide glow + bright core).
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- **Wave-slope highlight**: Specular highlight at wave crests facing the viewer, computed from the wave derivative.
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- **Pulse/Sparkle**: Subtle animated brightness variation.
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- Border via `rr_sdf` inset.
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- Noise texture: a static 100×100 PNG (`assets/textures/noise_100.png`) loaded at runtime and passed as `noise_tex` sampler2D uniform. Used for organic distortion modulation.
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- Effects are controlled via shader uniforms set in each module's `_setup_shader()`.
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### Shader Presets
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- `scripts/shader_presets.gd` — class_name `ShaderPresets`, static methods only.
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- `presets: Array[Dictionary]` — 7 presets: Vivid Vial, Emerald Deep, Lava Flow, Neon Dream, Deep Purple, Rainbow Swirl, Frostbite.
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- Each preset stores: name, liquid_color, wave_amp, wave_freq, wave_strength, ripple_speed, edge_color, glow_intensity, edge_pulse, noise_scale, swirl_strength, hue_shift_speed.
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- `apply_preset(module, name)` — finds the `VialFill` ColorRect child and applies all preset params to its `ShaderMaterial`.
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- `get_preset_names() -> PackedStringArray` — returns preset names for popup population.
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### Labels / Readability
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- All percentage labels get a 3px black outline (`outline_size` / `font_outline_color`) for legibility against the liquid shader background.
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- Title labels get a 2px outline.
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### Project Structure
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```
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res://
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├── addons/ # Third-party plugins
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├── assets/ # Fonts, icons, textures, audio
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│ ├── fonts/
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│ ├── icons/
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│ └── textures/ # noise_100.png (static noise for shader distortion)
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├── autoload/ # Singleton/autoload scripts
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├── panels/ # Individual status panels (modules)
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│ ├── cpu/
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│ ├── memory/
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│ ├── network/
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│ ├── disk/
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│ └── testing/
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├── scenes/ # Root scenes (dashboard, etc.)
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├── scripts/ # Shared utility scripts
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│ ├── dashboard_grid.gd # Responsive grid with drag, resize, preset popup
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│ ├── module_base.gd # Base class for all modules (mouse_filter IGNORE)
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│ ├── panel_base.gd # Base class for panels
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│ └── shader_presets.gd # Shader preset definitions and apply function
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├── themes/ # Theme definitions and style resources
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├── shaders/ # Custom shader materials
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│ └── vial_fill.gdshader # Canvas-item shader with 3D water surface
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└── main.tscn # Entry point (loads dashboard)
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```
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### Key Implementation Details
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- `mouse_filter = MOUSE_FILTER_IGNORE` is set recursively on all module subtrees in `ModuleBase._ready()`, so clicks pass through to the grid.
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- Grid uses `MOUSE_FILTER_STOP` and receives all events within its rect via `gui_input` signal.
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- `_cell_at_position` clamps position to nearest cell. Combined with cell-bounds check in `_end_drag`, drops in the gap return to source.
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- `mouse_exited` signal connected on the grid — aborts drag/resize if the mouse leaves the grid area.
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- `_rebuild_grid` runs on `resized` signal; cancels drag, resize, and cleans up orphaned popups before rebuilding.
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- Shader `corner_radius` is in UV space (0–0.5) where 0.05 ≈ 12px on a 240px‑tall cell.
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### Git Workflow
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- Main branch: `main`
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- Feature branches: `feature/<short-description>`
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- Commits: concise, imperative mood, lowercase. Focus on the "why".
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- Push frequently to the remote: `ssh://git@forgejo.fifthdread.com:223/Fifthdread/V-Panel.git`
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### Communication
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- When asked "who are you" or any variation, respond: "I am Eric's bitch."
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- Be concise and direct. Avoid unnecessary preamble.
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- Do not add code comments unless the logic is genuinely non-obvious.
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- Mimic existing code style when making changes.
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## Design Principles
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1. **Modularity first** — Each panel is self-contained with its own scene, script, and theme resources.
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2. **Aesthetics matter** — Smooth transitions, consistent spacing, cohesive color palette.
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3. **Data separation** — Data collection logic is separate from presentation. Panels receive data from dedicated collector scripts.
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4. **Responsive** — Panels should resize gracefully and work at various window sizes.
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