Created
August 21, 2021 16:17
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function calculateDiamond(matrix, chunkSize, randomFactor) { | |
let sumComponents = 0; | |
let sum = 0; | |
for (let i = 0; i < matrix.length - 1; i += chunkSize) { | |
for (let j = 0; j < matrix.length - 1; j += chunkSize) { | |
const BOTTOM_RIGHT = matrix[j + chunkSize] | |
? matrix[j + chunkSize][i + chunkSize] | |
: null; | |
const BOTTOM_LEFT = matrix[j + chunkSize] | |
? matrix[j + chunkSize][i] | |
: null; | |
const TOP_LEFT = matrix[j][i]; | |
const TOP_RIGHT = matrix[j][i + chunkSize]; | |
const { count, sum } = [ | |
BOTTOM_RIGHT, | |
BOTTOM_LEFT, | |
TOP_LEFT, | |
TOP_RIGHT | |
].reduce( | |
(result, value) => { | |
if (isFinite(value) && value != null) { | |
result.sum += value; | |
result.count += 1; | |
} | |
return result; | |
}, | |
{ sum: 0, count: 0 } | |
); | |
const changed = {row: j + chunkSize / 2, column: i + chunkSize / 2}; | |
matrix[changed.row][changed.column] = | |
sum / count + randomInRange(-randomFactor, randomFactor); | |
} | |
} | |
return matrix; | |
} |
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