screenToGrid (inputGeometry.ts)

Maps screen touch coordinates to grid cells; computes distances/clamps for UI input in game geometry.

// Source: https://github.com/SweetSophia/openclaw-pixel-agents | License: MIT | Copyright 2026 Sherina
// Provided via justclaw.it.com; keep this notice with the code.
export interface ClientPoint {
  clientX: number;
  clientY: number;
}

export interface ScreenRect {
  readonly left: number;
  readonly top: number;
  readonly width: number;
  readonly height: number;
}

export interface CanvasMetrics {
  readonly rect: ScreenRect;
  readonly canvasWidth: number;
  readonly canvasHeight: number;
  readonly tileSize: number;
}

export interface GridPoint {
  gridX: number;
  gridY: number;
}

/** Map client coordinates into the canvas grid, accounting for object-fit bars. */
// `Readonly<CanvasMetrics>` widens the readonly view structurally — consumed
// as a guarantee that no consumer ca

... (truncated -- full source via MCP)