import StencilFunction from './StencilFunction.js';
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import StencilOperation from './StencilOperation.js';
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/**
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* The most significant bit is used to identify whether the pixel is 3D Tiles.
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* The next three bits store selection depth for the skip LODs optimization.
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* The last four bits are for increment/decrement shadow volume operations for classification.
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*
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* @private
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*/
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var StencilConstants = {
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CESIUM_3D_TILE_MASK : 0x80,
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SKIP_LOD_MASK : 0x70,
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SKIP_LOD_BIT_SHIFT : 4,
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CLASSIFICATION_MASK : 0x0F
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};
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StencilConstants.setCesium3DTileBit = function() {
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return {
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enabled : true,
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frontFunction : StencilFunction.ALWAYS,
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frontOperation : {
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fail : StencilOperation.KEEP,
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zFail : StencilOperation.KEEP,
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zPass : StencilOperation.REPLACE
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},
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backFunction : StencilFunction.ALWAYS,
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backOperation : {
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fail : StencilOperation.KEEP,
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zFail : StencilOperation.KEEP,
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zPass : StencilOperation.REPLACE
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},
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reference : StencilConstants.CESIUM_3D_TILE_MASK,
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mask : StencilConstants.CESIUM_3D_TILE_MASK
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};
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};
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export default Object.freeze(StencilConstants);
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