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Aspose.3D for Java 22.4发行说明

改进和变更

钥匙摘要类别
THREEDNET-1116节点的euleangle混淆导致模型旋转后的错误位置错误修复
THREEDNET-1137从FBX导入的LayeredTexture可能会生成无效的GLTF文件错误修复
THREEDNET-1119支持GLTF自定义顶点属性新功能
THREEDNET-1129GLB到U3D转换导致方向错误新功能
THREEDNET-1121点云出口支持在USD/USDZ新功能
THREEDNET-1122点云导入支持在USD/USDZ新功能
THREEDNET-1113加载OBJ模型丢失纹理坐标vt错误修复
THREEDNET-1107当应用程序构建为单个可执行文件时，无法加载许可证。错误修复

API更改

需要此版本中的所有API更改才能通过TriMesh导出glTF中的用户数据，下一个版本将支持Mesh和VertexElementUserData中的用户数据。

在类com.aspose.threed.VertexDeclaration中添加了方法AddField:

    /**
     * Add a new vertex field
     * @param dataType The data type of the vertex field
     * @param semantic How will this field used for
     * @param index The index for same field semantic, -1 for auto-generation
     * @param alias The alias name of the field
     */
    public VertexField addField(int dataType, VertexFieldSemantic semantic, int index, String alias);

新的AddField增加了一个新的参数别名要指定字段的别名，它的工作原理与SemanticAttribute的新添加构造函数完全相同。

添加成员到类com.aspose.threed.VertexField:

    /**
     * Field's alias 
     */
    public String getAlias();

将自定义数据导出到glTF的代码段

private static void writeVertex(DataOutputStream writer,
                                float px, float py, float pz,
                                float nx, float ny, float nz,
                                float u, float v,
                                float batchId)
        throws IOException
{
        writer.writeFloat(px);
        writer.writeFloat(py);
        writer.writeFloat(pz);

        writer.writeFloat(nx);
        writer.writeFloat(ny);
        writer.writeFloat(nz);

        writer.writeFloat(u);
        writer.writeFloat(v);

        writer.writeFloat(batchId);
}

private static void exportCustomFieldToGLTF()
        throws Exception
{
        byte[] verticesInBytes;
        try(var os = new ByteArrayOutputStream())
        {
            try(var writer = new DataOutputStream(os)) {
                writeVertex(writer, 1, 0, 0, 0, 1, 0, 0, 0, 1);
                writeVertex(writer, 1, 1, 0, 0, 1, 0, 0, 1, 2);
                writeVertex(writer, 0, 1, 0, 0, 1, 0, 1, 0, 3);
                writeVertex(writer, 0, 1, 1, 0, 1, 0, 1, 1, 4);
            }
            verticesInBytes = os.toByteArray();
        }
        var indices = new int[]
        {
                0, 1, 2,
                1, 2, 3
        };
        //create a vertex declaration
        VertexDeclaration vd = new VertexDeclaration();
        vd.addField(VertexFieldDataType.F_VECTOR3, VertexFieldSemantic.POSITION);
        vd.addField(VertexFieldDataType.F_VECTOR3, VertexFieldSemantic.NORMAL);
        vd.addField(VertexFieldDataType.F_VECTOR2, VertexFieldSemantic.UV);
        vd.addField(VertexFieldDataType.FLOAT, VertexFieldSemantic.USER_DATA, -1, "_BATCH_ID");
        //construct a TriMesh from raw bytes of vertices and indices
        var mesh = TriMesh.fromRawData(vd, verticesInBytes, indices, false);
        //create a scene with the mesh
        var scene = new Scene(mesh);
        //export the scene to a binary glTF file
        scene.save("test.glb", FileFormat.GLTF2_BINARY);
        // The GLTF primitive generated in the test.glb will be:
        // {"attributes" : {"POSITION" : 1, "NORMAL" : 3, "TEXCOORD_0" : 2, "_BATCH_ID" : 4}, "mode" : 4}
}

 
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