@itwin/core-frontend
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iTwin.js frontend components
104 lines • 4.69 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Bentley Systems, Incorporated. All rights reserved.
* See LICENSE.md in the project root for license terms and full copyright notice.
*--------------------------------------------------------------------------------------------*/
/** @packageDocumentation
* @module WebGL
*/
class AttributeMapEntry {
uninstanced = new Map();
instanced = new Map();
constructor(attributes) {
for (const attr of attributes) {
const detail = { location: attr[1], type: attr[2] };
this.uninstanced.set(attr[0], detail);
this.instanced.set(attr[0], detail);
}
const instanceAttrs = [
["a_instanceMatrixRow0", 5 /* VariableType.Vec4 */],
["a_instanceMatrixRow1", 5 /* VariableType.Vec4 */],
["a_instanceMatrixRow2", 5 /* VariableType.Vec4 */],
["a_instanceOverrides", 5 /* VariableType.Vec4 */],
["a_instanceRgba", 5 /* VariableType.Vec4 */],
["a_featureId", 4 /* VariableType.Vec3 */],
["a_patternX", 2 /* VariableType.Float */],
["a_patternY", 2 /* VariableType.Float */],
];
let location = attributes.length;
for (const attr of instanceAttrs) {
this.instanced.set(attr[0], { location, type: attr[1] });
++location;
}
}
}
/**
* A class with static methods which provide access to a global mapping between techniques and attribute details (location and variable type).
* These details are used when constructing shaders and when setting up buffers through implementations of the BuffersContainer abstract class.
* @internal
*/
export class AttributeMap {
_attrMaps;
constructor() {
const posOnly = new AttributeMapEntry([["a_pos", 0, 4 /* VariableType.Vec3 */]]);
const skySphere = new AttributeMapEntry([
["a_pos", 0, 4 /* VariableType.Vec3 */],
["a_worldPos", 1, 4 /* VariableType.Vec3 */],
]);
const polyline = new AttributeMapEntry([
["a_pos", 0, 4 /* VariableType.Vec3 */],
["a_prevIndex", 1, 4 /* VariableType.Vec3 */],
["a_nextIndex", 2, 4 /* VariableType.Vec3 */],
["a_param", 3, 2 /* VariableType.Float */],
]);
const edge = new AttributeMapEntry([
["a_pos", 0, 4 /* VariableType.Vec3 */],
["a_endPointAndQuadIndices", 1, 5 /* VariableType.Vec4 */],
]);
const silhouette = new AttributeMapEntry([
["a_pos", 0, 4 /* VariableType.Vec3 */],
["a_endPointAndQuadIndices", 1, 5 /* VariableType.Vec4 */],
["a_normals", 2, 5 /* VariableType.Vec4 */],
]);
const pointCloud = new AttributeMapEntry([
["a_pos", 0, 4 /* VariableType.Vec3 */],
["a_color", 1, 4 /* VariableType.Vec3 */],
]);
const realityMesh = new AttributeMapEntry([
["a_pos", 0, 4 /* VariableType.Vec3 */],
["a_norm", 1, 3 /* VariableType.Vec2 */],
["a_uvParam", 2, 3 /* VariableType.Vec2 */],
]);
const planarGrid = new AttributeMapEntry([
["a_pos", 0, 4 /* VariableType.Vec3 */],
["a_uvParam", 1, 3 /* VariableType.Vec2 */],
]);
const screenPoints = new AttributeMapEntry([
["a_pos", 0, 3 /* VariableType.Vec2 */],
]);
this._attrMaps = new Map([
[undefined, posOnly],
[24 /* TechniqueId.SkySphereGradient */, skySphere],
[25 /* TechniqueId.SkySphereTexture */, skySphere],
[1 /* TechniqueId.Polyline */, polyline],
[4 /* TechniqueId.Edge */, edge],
[5 /* TechniqueId.SilhouetteEdge */, silhouette],
[2 /* TechniqueId.PointCloud */, pointCloud],
[31 /* TechniqueId.VolClassCopyZ */, screenPoints],
[7 /* TechniqueId.RealityMesh */, realityMesh],
[8 /* TechniqueId.PlanarGrid */, planarGrid],
]);
}
static findAttributeMap(techniqueId, instanced) {
let entry = attributeMap._attrMaps.get(techniqueId);
if (undefined === entry) {
entry = attributeMap._attrMaps.get(undefined);
attributeMap._attrMaps.set(techniqueId, entry);
}
return instanced ? entry.instanced : entry.uninstanced;
}
static findAttribute(attributeName, techniqueId, instanced) {
return AttributeMap.findAttributeMap(techniqueId, instanced).get(attributeName);
}
}
const attributeMap = new AttributeMap();
//# sourceMappingURL=AttributeMap.js.map