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- {"ast":null,"code":"var LN2 = Math.log(2);\nfunction determinant(rows, rank, rowStart, rowMask, colMask, detCache) {\n var cacheKey = rowMask + '-' + colMask;\n var fullRank = rows.length;\n if (detCache.hasOwnProperty(cacheKey)) {\n return detCache[cacheKey];\n }\n if (rank === 1) {\n var colStart = Math.round(Math.log((1 << fullRank) - 1 & ~colMask) / LN2);\n return rows[rowStart][colStart];\n }\n var subRowMask = rowMask | 1 << rowStart;\n var subRowStart = rowStart + 1;\n while (rowMask & 1 << subRowStart) {\n subRowStart++;\n }\n var sum = 0;\n for (var j = 0, colLocalIdx = 0; j < fullRank; j++) {\n var colTag = 1 << j;\n if (!(colTag & colMask)) {\n sum += (colLocalIdx % 2 ? -1 : 1) * rows[rowStart][j] * determinant(rows, rank - 1, subRowStart, subRowMask, colMask | colTag, detCache);\n colLocalIdx++;\n }\n }\n detCache[cacheKey] = sum;\n return sum;\n}\nexport function buildTransformer(src, dest) {\n var mA = [[src[0], src[1], 1, 0, 0, 0, -dest[0] * src[0], -dest[0] * src[1]], [0, 0, 0, src[0], src[1], 1, -dest[1] * src[0], -dest[1] * src[1]], [src[2], src[3], 1, 0, 0, 0, -dest[2] * src[2], -dest[2] * src[3]], [0, 0, 0, src[2], src[3], 1, -dest[3] * src[2], -dest[3] * src[3]], [src[4], src[5], 1, 0, 0, 0, -dest[4] * src[4], -dest[4] * src[5]], [0, 0, 0, src[4], src[5], 1, -dest[5] * src[4], -dest[5] * src[5]], [src[6], src[7], 1, 0, 0, 0, -dest[6] * src[6], -dest[6] * src[7]], [0, 0, 0, src[6], src[7], 1, -dest[7] * src[6], -dest[7] * src[7]]];\n var detCache = {};\n var det = determinant(mA, 8, 0, 0, 0, detCache);\n if (det === 0) {\n return;\n }\n var vh = [];\n for (var i = 0; i < 8; i++) {\n for (var j = 0; j < 8; j++) {\n vh[j] == null && (vh[j] = 0);\n vh[j] += ((i + j) % 2 ? -1 : 1) * determinant(mA, 7, i === 0 ? 1 : 0, 1 << i, 1 << j, detCache) / det * dest[i];\n }\n }\n return function (out, srcPointX, srcPointY) {\n var pk = srcPointX * vh[6] + srcPointY * vh[7] + 1;\n out[0] = (srcPointX * vh[0] + srcPointY * vh[1] + vh[2]) / pk;\n out[1] = (srcPointX * vh[3] + srcPointY * vh[4] + vh[5]) / pk;\n };\n}","map":{"version":3,"names":["LN2","Math","log","determinant","rows","rank","rowStart","rowMask","colMask","detCache","cacheKey","fullRank","length","hasOwnProperty","colStart","round","subRowMask","subRowStart","sum","j","colLocalIdx","colTag","buildTransformer","src","dest","mA","det","vh","i","out","srcPointX","srcPointY","pk"],"sources":["E:/git/2021项目/安科院大屏/node_modules/zrender/lib/core/fourPointsTransform.js"],"sourcesContent":["var LN2 = Math.log(2);\nfunction determinant(rows, rank, rowStart, rowMask, colMask, detCache) {\n var cacheKey = rowMask + '-' + colMask;\n var fullRank = rows.length;\n if (detCache.hasOwnProperty(cacheKey)) {\n return detCache[cacheKey];\n }\n if (rank === 1) {\n var colStart = Math.round(Math.log(((1 << fullRank) - 1) & ~colMask) / LN2);\n return rows[rowStart][colStart];\n }\n var subRowMask = rowMask | (1 << rowStart);\n var subRowStart = rowStart + 1;\n while (rowMask & (1 << subRowStart)) {\n subRowStart++;\n }\n var sum = 0;\n for (var j = 0, colLocalIdx = 0; j < fullRank; j++) {\n var colTag = 1 << j;\n if (!(colTag & colMask)) {\n sum += (colLocalIdx % 2 ? 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