返回sfmesh对象中第N个纹理。
语法
texture ST_TextureN(sfmesh sfmeshObject, int4 index);参数
| 参数名称 | 描述 |
|---|---|
| sfmeshObject | sfmesh对象。 |
| index | 纹理索引编号，从0开始。 |
描述
返回sfmesh对象中第N个纹理。
示例
select ST_TextureN('{"meshgeoms" : ["MESHGEOM(PATCH(TRIANGLESTRIP(0 0,0 10,10 10,10 0)))"], "materials":[{"type":"db", "attributes": {"schema":"public","table":"t_material","column":"the_material","key":"num=1"}} ], "textures":[{"compressionType" : "None", "format" : "JPEG", "wrap" : "Wrap", "type" : "DB", "depth" : 3, "width" : 256, "height" : 256, "name" : "texture_name3", "size" : 72, "data" : {"schema":"public","table":"test","column":"the_texture","key":"num=1"}} ],"primitives" : [ {"meshgeom": 0, "material" : 0}], "nodes" : [ {"primitive" : 0} ] }'::sfmesh, 0);
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01010001010303000100000001000005000000123456FFFF