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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | 2x 2x 2x 2x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | import ColorGeometryInstanceAttribute from "../Core/ColorGeometryInstanceAttribute.js";
import Frozen from "../Core/Frozen.js";
import defined from "../Core/defined.js";
import DeveloperError from "../Core/DeveloperError.js";
import GeometryInstance from "../Core/GeometryInstance.js";
import GeometryPipeline from "../Core/GeometryPipeline.js";
import Matrix4 from "../Core/Matrix4.js";
import PerInstanceColorAppearance from "./PerInstanceColorAppearance.js";
import Primitive from "./Primitive.js";
/**
* Creates a {@link Primitive} to visualize well-known vector vertex attributes:
* <code>normal</code>, <code>tangent</code>, and <code>bitangent</code>. Normal
* is red; tangent is green; and bitangent is blue. If an attribute is not
* present, it is not drawn.
*
* @function
*
* @param {object} options Object with the following properties:
* @param {Geometry} options.geometry The <code>Geometry</code> instance with the attribute.
* @param {number} [options.length=10000.0] The length of each line segment in meters. This can be negative to point the vector in the opposite direction.
* @param {Matrix4} [options.modelMatrix=Matrix4.IDENTITY] The model matrix that transforms to transform the geometry from model to world coordinates.
* @returns {Primitive} A new <code>Primitive</code> instance with geometry for the vectors.
*
* @example
* scene.primitives.add(Cesium.createTangentSpaceDebugPrimitive({
* geometry : instance.geometry,
* length : 100000.0,
* modelMatrix : instance.modelMatrix
* }));
*/
function createTangentSpaceDebugPrimitive(options) {
options = options ?? Frozen.EMPTY_OBJECT;
const instances = [];
let geometry = options.geometry;
//>>includeStart('debug', pragmas.debug);
if (!defined(geometry)) {
throw new DeveloperError("options.geometry is required.");
}
//>>includeEnd('debug');
Eif (!defined(geometry.attributes) || !defined(geometry.primitiveType)) {
// to create the debug lines, we need the computed attributes.
// compute them if they are undefined.
geometry = geometry.constructor.createGeometry(geometry);
}
const attributes = geometry.attributes;
const modelMatrix = Matrix4.clone(options.modelMatrix ?? Matrix4.IDENTITY);
const length = options.length ?? 10000.0;
Eif (defined(attributes.normal)) {
instances.push(
new GeometryInstance({
geometry: GeometryPipeline.createLineSegmentsForVectors(
geometry,
"normal",
length,
),
attributes: {
color: new ColorGeometryInstanceAttribute(1.0, 0.0, 0.0, 1.0),
},
modelMatrix: modelMatrix,
}),
);
}
Eif (defined(attributes.tangent)) {
instances.push(
new GeometryInstance({
geometry: GeometryPipeline.createLineSegmentsForVectors(
geometry,
"tangent",
length,
),
attributes: {
color: new ColorGeometryInstanceAttribute(0.0, 1.0, 0.0, 1.0),
},
modelMatrix: modelMatrix,
}),
);
}
Eif (defined(attributes.bitangent)) {
instances.push(
new GeometryInstance({
geometry: GeometryPipeline.createLineSegmentsForVectors(
geometry,
"bitangent",
length,
),
attributes: {
color: new ColorGeometryInstanceAttribute(0.0, 0.0, 1.0, 1.0),
},
modelMatrix: modelMatrix,
}),
);
}
Eif (instances.length > 0) {
return new Primitive({
asynchronous: false,
geometryInstances: instances,
appearance: new PerInstanceColorAppearance({
flat: true,
translucent: false,
}),
});
}
return undefined;
}
export default createTangentSpaceDebugPrimitive;
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