161 lines
4.0 KiB
JavaScript
161 lines
4.0 KiB
JavaScript
import Check from "../../Core/Check.js";
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import clone from "../../Core/clone.js";
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/**
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* A model is made up of one or more nodes in the scene graph. Some details
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* such as instancing are computed on a per-node basis. This class provides
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* a place to store such details. It also inherits some properties from
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* the model render resources.
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*
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* @constructor
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*
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* @param {ModelRenderResources} modelRenderResources The model resources to inherit
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* @param {ModelRuntimeNode} runtimeNode The in-memory representation of the scene graph node.
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*
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* @private
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*/
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function NodeRenderResources(modelRenderResources, runtimeNode) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("modelRenderResources", modelRenderResources);
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Check.typeOf.object("runtimeNode", runtimeNode);
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//>>includeEnd('debug');
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// Properties inherited from the ModelRenderResources.
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/**
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* A reference to the model. Inherited from the model render resources.
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*
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* @type {Model}
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* @readonly
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*
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* @private
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*/
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this.model = modelRenderResources.model;
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/**
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* An object used to build a shader incrementally. This is cloned from the
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* model render resources because each node can compute a different shader.
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*
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* @type {ShaderBuilder}
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* @readonly
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*
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* @private
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*/
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this.shaderBuilder = modelRenderResources.shaderBuilder.clone();
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/**
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* A dictionary mapping uniform name to functions that return the uniform
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* values. Inherited from the model render resources.
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*
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* @type {Object<string, Function>}
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* @readonly
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*
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* @private
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*/
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this.uniformMap = clone(modelRenderResources.uniformMap);
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/**
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* Options for configuring the alpha stage such as pass and alpha cutoff.
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* Inherited from the model render resources.
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*
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* @type {ModelAlphaOptions}
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* @readonly
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*
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* @private
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*/
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this.alphaOptions = clone(modelRenderResources.alphaOptions);
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/**
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* An object storing options for creating a {@link RenderState}.
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* The pipeline stages simply set the options, the render state is created
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* when the {@link DrawCommand} is constructed. Inherited from the model
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* render resources.
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*
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* @type {object}
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* @readonly
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*
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* @private
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*/
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this.renderStateOptions = clone(
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modelRenderResources.renderStateOptions,
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true
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);
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/**
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* Whether the model has a silhouette. This value indicates what draw commands
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* are needed. Inherited from the model render resources.
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*
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* @type {boolean}
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* @readonly
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*
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* @private
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*/
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this.hasSilhouette = modelRenderResources.hasSilhouette;
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/**
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* Whether the model is part of a tileset that uses the skipLevelOfDetail
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* optimization. This value indicates what draw commands are needed.
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* Inherited from the model render resources.
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*
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* @type {boolean}
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* @readonly
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*
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* @private
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*/
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this.hasSkipLevelOfDetail = modelRenderResources.hasSkipLevelOfDetail;
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// Other properties.
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/**
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* A reference to the runtime node
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*
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* @type {ModelRuntimeNode}
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* @readonly
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*
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* @private
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*/
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this.runtimeNode = runtimeNode;
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/**
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* An array of objects describing vertex attributes that will eventually
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* be used to create a {@link VertexArray} for the draw command. Attributes
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* at the node level may be needed for extensions such as EXT_mesh_gpu_instancing.
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*
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* @type {Object[]}
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* @readonly
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*
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* @private
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*/
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this.attributes = [];
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/**
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* The index to give to the next vertex attribute added to the attributes array.
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* POSITION takes index 0.
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*
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* @type {number}
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*
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* @private
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*/
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this.attributeIndex = 1;
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/**
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* The set index to assign to feature ID vertex attribute(s) created from the
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* offset/repeat in the feature ID attribute.
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*
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* @type {number}
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* @default 0
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*
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* @private
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*/
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this.featureIdVertexAttributeSetIndex = 0;
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/**
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* The number of instances. This value is set by InstancingPipelineStage.
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*
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* @type {number}
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* @default 0
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*
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* @private
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*/
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this.instanceCount = 0;
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}
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export default NodeRenderResources;
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