Created
June 14, 2017 19:16
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calculating diagonal moves with friendly blockers
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| // m: proposed move | |
| // blockers: blocking pieces | |
| // pp: current piece position | |
| function diagonalChecks(m, blockers, pp) { | |
| let isGood = true; | |
| for (const b of blockers) { | |
| if (b.rank > pp.rank && b.file > pp.file) { | |
| if (m.rank > pp.rank && m.file > pp.file) { | |
| isGood = isGood && (m.rank < b.rank && m.file < b.file); | |
| } | |
| } | |
| if (b.rank > pp.rank && b.file < pp.file) { | |
| if (m.rank > pp.rank && m.file < pp.file) { | |
| isGood = isGood && (m.rank < b.rank && m.file > b.file) | |
| } | |
| } | |
| if (b.rank < pp.rank && b.file > pp.file) { | |
| if (m.rank < pp.rank && m.file > pp.file) { | |
| isGood = isGood && (m.rank > b.rank && m.file < b.file) | |
| } | |
| } | |
| if (b.rank < pp.rank && b.file < pp.file) { | |
| if (m.rank < pp.rank && m.file < pp.file) { | |
| isGood = isGood && (m.rank > b.rank && m.file > b.file) | |
| } | |
| } | |
| } | |
| return isGood; | |
| } |
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