@logic-pad/core/dist/data/solver/z3/modules/viewpointModule.js

import Z3Module from './z3Module.js';
import { instance as viewpointInstance, } from '../../../symbols/viewpointSymbol.js';
import { Point, reduceCells } from 'grilops';
import { DIRECTIONS } from '../../../primitives.js';
import { move } from '../../../dataHelper.js';
import { convertDirection } from '../utils.js';
export default class ViewpointModule extends Z3Module {
    constructor() {
        super(...arguments);
        Object.defineProperty(this, "id", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: viewpointInstance.id
        });
    }
    encode(grid, ctx) {
        const symbols = grid.symbols.get(this.id);
        // optimizations
        if (!symbols || symbols.length === 0) {
            return;
        }
        // encode for real
        for (const symbol of symbols) {
            const x = Math.floor(symbol.x);
            const y = Math.floor(symbol.y);
            const origin = ctx.grid.cellAt(new Point(y, x));
            const sumTerms = [];
            DIRECTIONS.forEach(direction => {
                const startPos = move({ x, y }, direction);
                sumTerms.push(reduceCells(ctx.grid.ctx, ctx.grid, new Point(startPos.y, startPos.x), convertDirection(direction), ctx.ctx.Int.val(0), (acc, cell) => ctx.ctx.If(cell.eq(origin), acc.add(1), acc), (_, cell) => cell.neq(origin)));
            });
            ctx.solver.add(ctx.ctx.Sum(ctx.ctx.Int.val(1), ...sumTerms).eq(symbol.number));
        }
    }
}
export const instance = new ViewpointModule();