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🔨 fix isFree function

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This commit is contained in:
platane
2020-10-24 11:16:00 +02:00
parent b2ac63d6ef
commit 242a28959f
1 changed files with 13 additions and 8 deletions
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21
packages/compute/pruneLayer.ts
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@@ -52,6 +52,9 @@ const getEscapePath = (grid: Grid, x: number, y: number, color: Color) => {
return null;
};
/**
* returns true if the snake can reach outside from it's location
*/
const snakeCanEscape = (grid: Grid, snake: Snake, color: Color) => {
const openList: Snake[] = [snake];
const closeList: Snake[] = [];
@@ -63,16 +66,18 @@ const snakeCanEscape = (grid: Grid, snake: Snake, color: Color) => {
const x = getHeadX(s) + a.x;
const y = getHeadY(s) + a.y;
if (!isInside(grid, x, y)) return true;
if (!snakeWillSelfCollide(s, a.x, a.y)) {
if (!isInside(grid, x, y)) return true;
const u = getColor(grid, x, y);
const u = getColor(grid, x, y);
if ((isEmpty(u) || u <= color) && !snakeWillSelfCollide(s, a.x, a.y)) {
const sn = nextSnake(s, a.x, a.y);
if (isEmpty(u) || u <= color) {
const sn = nextSnake(s, a.x, a.y);
if (!closeList.some((s0) => snakeEquals(s0, sn))) {
openList.push(sn);
closeList.push(sn);
if (!closeList.some((s0) => snakeEquals(s0, sn))) {
openList.push(sn);
closeList.push(sn);
}
}
}
}
@@ -82,7 +87,7 @@ const snakeCanEscape = (grid: Grid, snake: Snake, color: Color) => {
};
/**
* returns true if the cell can be reached by the snake from anywhere, and the snake can go back to anywhere
* returns true if the cell can be reached by the snake from outside, and the snake can go back outside
*/
const isFree = (
grid: Grid,