Determines the function used to compare two depths for the depth test.
        
        
        Source: 
        Scene/DepthFunction.js, line 14
    
    
Members
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    staticconstantDepthFunction.ALWAYS :Number
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    0x207. The depth test always passes.Source: Scene/DepthFunction.js, line 77
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    staticconstantDepthFunction.EQUAL :Number
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    0x202. The depth test passes if the incoming depth is equal to the stored depth.Source: Scene/DepthFunction.js, line 37
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    staticconstantDepthFunction.GREATER :Number
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    0x204. The depth test passes if the incoming depth is greater than the stored depth.Source: Scene/DepthFunction.js, line 53
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    staticconstantDepthFunction.GREATER_OR_EQUAL :Number
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    0x206. The depth test passes if the incoming depth is greater than or equal to the stored depth.Source: Scene/DepthFunction.js, line 69
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    staticconstantDepthFunction.LESS :Number
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    0x201. The depth test passes if the incoming depth is less than the stored depth.Source: Scene/DepthFunction.js, line 29
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    staticconstantDepthFunction.LESS_OR_EQUAL :Number
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    0x203. The depth test passes if the incoming depth is less than or equal to the stored depth.Source: Scene/DepthFunction.js, line 45
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    staticconstantDepthFunction.NEVER :Number
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    0x200. The depth test never passes.Source: Scene/DepthFunction.js, line 21
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    staticconstantDepthFunction.NOT_EQUAL :Number
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    0x0205. The depth test passes if the incoming depth is not equal to the stored depth.Source: Scene/DepthFunction.js, line 61
