OptiGrid App - Grid Optical Illusion Pattern Studio

A desktop application for creating and managing ball pattern layouts on a grid.

Check the home page for a more detailed description URL: https://dotoca.net/optigrid

Features

• Interactive Grid: Dynamic grid (8-50 rows/columns), checkerboard pattern, square cells

• 8 Ball States per Cell:

  • 0: Empty
  • 1: Diagonal ↘ (top-left, bottom-right)
  • 2: Diagonal ↗ (top-right, bottom-left)
  • 3: Right side (both right balls)
  • 4: Left side (both left balls)
  • 5: Top side (both top balls)
  • 6: Bottom side (both bottom balls)
  • 7: All 4 balls

• 10 Save Slots: Store and load patterns (keys 1-9, 0 for slot 10)

• Auto Mode: Cycle through slots automatically

• Smooth Animation: Ball movement interpolation

• Window Resizing: Full window resize support

• Optical Illusion Mode: Create mesmerizing patterns

Controls

Key	Action
Left Click	Cycle cell state (0→1→2→3→4→5→6→7→0)
1-9, 0	Load slot 1-9, 10
Shift+1-9, Shift+0	Save to slot
A	Toggle Auto Mode
C	Clear all cells
[	Decrease columns (min 8)
]	Increase columns (max 50)
-	Decrease rows (min 8)
+	Increase rows (max 50)

Optical Illusion Mode

This application is inspired by the famous "Grid" optical illusion where small circles inside a grid create virtual concentric rings that trick the brain into seeing a bubble distortion despite all lines being perfectly parallel.

With 8 ball states per cell (including state 7 with all 4 balls), you can create similar mesmerizing patterns that play with visual perception.

Tips to enhance the effect:

• Use state 7 (all 4 balls) for maximum visual impact
• Create patterns that guide the eye toward the center
• Try the Auto Mode to cycle through saved patterns

Build

mkdir -p ./build
make darwin		 # for macOS
make windows 	 # for Windows
make linux 		 # for Linux

OR

go mod init optigrid
go mod tidy
go build -o optigrid

Requirements

• Go 1.20+
• Ebiten v2

License

MIT