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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 | 22x 22x 2634x 7902x | import ComponentDatatype from "../../Core/ComponentDatatype.js";
/**
* Returns a function to read and convert data from a DataView into an array.
*
* @param {number} componentType Type to convert the data to.
* @returns {ComponentReader} Function that reads and converts data.
*
* @private
*/
function getComponentReader(componentType) {
switch (componentType) {
case ComponentDatatype.BYTE:
return function (
dataView,
byteOffset,
numberOfComponents,
componentTypeByteLength,
result,
) {
for (let i = 0; i < numberOfComponents; ++i) {
result[i] = dataView.getInt8(
byteOffset + i * componentTypeByteLength,
);
}
};
case ComponentDatatype.UNSIGNED_BYTE:
return function (
dataView,
byteOffset,
numberOfComponents,
componentTypeByteLength,
result,
) {
for (let i = 0; i < numberOfComponents; ++i) {
result[i] = dataView.getUint8(
byteOffset + i * componentTypeByteLength,
);
}
};
case ComponentDatatype.SHORT:
return function (
dataView,
byteOffset,
numberOfComponents,
componentTypeByteLength,
result,
) {
for (let i = 0; i < numberOfComponents; ++i) {
result[i] = dataView.getInt16(
byteOffset + i * componentTypeByteLength,
true,
);
}
};
case ComponentDatatype.UNSIGNED_SHORT:
return function (
dataView,
byteOffset,
numberOfComponents,
componentTypeByteLength,
result,
) {
for (let i = 0; i < numberOfComponents; ++i) {
result[i] = dataView.getUint16(
byteOffset + i * componentTypeByteLength,
true,
);
}
};
case ComponentDatatype.INT:
return function (
dataView,
byteOffset,
numberOfComponents,
componentTypeByteLength,
result,
) {
for (let i = 0; i < numberOfComponents; ++i) {
result[i] = dataView.getInt32(
byteOffset + i * componentTypeByteLength,
true,
);
}
};
case ComponentDatatype.UNSIGNED_INT:
return function (
dataView,
byteOffset,
numberOfComponents,
componentTypeByteLength,
result,
) {
for (let i = 0; i < numberOfComponents; ++i) {
result[i] = dataView.getUint32(
byteOffset + i * componentTypeByteLength,
true,
);
}
};
case ComponentDatatype.FLOAT:
return function (
dataView,
byteOffset,
numberOfComponents,
componentTypeByteLength,
result,
) {
for (let i = 0; i < numberOfComponents; ++i) {
result[i] = dataView.getFloat32(
byteOffset + i * componentTypeByteLength,
true,
);
}
};
case ComponentDatatype.DOUBLE:
return function (
dataView,
byteOffset,
numberOfComponents,
componentTypeByteLength,
result,
) {
for (let i = 0; i < numberOfComponents; ++i) {
result[i] = dataView.getFloat64(
byteOffset + i * componentTypeByteLength,
true,
);
}
};
}
}
/**
* A callback function that logs messages.
* @callback ComponentReader
*
* @param {DataView} dataView The data view to read from.
* @param {number} byteOffset The byte offset applied when reading from the data view.
* @param {number} numberOfComponents The number of components to read.
* @param {number} componentTypeByteLength The byte length of each component.
* @param {number} result An array storing the components that are read.
*
* @private
*/
export default getComponentReader;
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