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Merge pull request #11 from fanzhanggoogle/update_js_decoder_doc

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Updated doc of JS decoder in README
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FanZhang 2017-01-10 11:02:10 -08:00 committed by GitHub
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README.md
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@ -250,21 +250,28 @@ Javascript Decoder
------------------
The Javascript decoder is located in `javascript/draco_decoder.js`. The
Javascript decoder can currently only decode mesh geometry. In order to use the
decoder you must create `DecoderBuffer` and `WebIDLWrapper` objects. Set the
encoded data in the `DecoderBuffer`. Then call `DecodeMeshFromBuffer()`, which
will return a Mesh object. E.g.
Javascript decoder can decode mesh and point cloud. In order to use the
decoder you must first create `DecoderBuffer` and `WebIDLWrapper` objects. Set the
encoded data in the `DecoderBuffer`. Then call `GetEncodedGeometryType()` to identify
the type of geometry, e.g. mesh or point cloud. Then call either `DecodeMeshFromBuffer()` or
`DecodePointCloudFromBuffer()` which will return a Mesh object or a point cloud. E.g.
~~~~~ js
var buffer = new Module.DecoderBuffer();
buffer.Init(encFileData, encFileData.length);
var wrapper = new WebIDLWrapper();
var outputMesh = wrapper.DecodeMeshFromBuffer(buffer);
const geometryType = wrapper.GetEncodedGeometryType(buffer);
let outputGeometry;
if (geometryType == DracoModule.TRIANGULAR_MESH) {
var outputGeometry = wrapper.DecodeMeshFromBuffer(buffer);
} else {
var outputGeometry = wrapper.DecodePointCloudFromBuffer(buffer);
}
destroy(outputMesh);
destroy(wrapper);
destroy(buffer);
DracoModule.destroy(outputGeometry);
DracoModule.destroy(wrapper);
DracoModule.destroy(buffer);
~~~~~
Please see `javascript/emscripten/draco_web.idl` for the full API.