Deprecate hexadecimal getters/setters

[donmccurdy]

For baseColorFactor and all other material color inputs (including extensions), I've provided getters/setters for both factors and hexadecimal values. This affects most new material extensions, has started to feel like an unnecessary bit of clutter.

glTF-Transform/packages/core/src/properties/material.ts

Lines 193 to 222 in 5f27fbd

	/**
	* Base color / albedo factor; Linear-sRGB components.
	* See {@link Material.getBaseColorTexture getBaseColorTexture}.
	*/
	public getBaseColorFactor(): vec4 {
	return this.get('baseColorFactor');
	}
	/**
	* Base color / albedo factor; Linear-sRGB components.
	* See {@link Material.getBaseColorTexture getBaseColorTexture}.
	*/
	public setBaseColorFactor(baseColorFactor: vec4): this {
	return this.set('baseColorFactor', baseColorFactor);
	}
	/**
	* Base color / albedo; sRGB hexadecimal color. See {@link Material.getBaseColorTexture getBaseColorTexture}.
	*/
	public getBaseColorHex(): number {
	return ColorUtils.factorToHex(this.get('baseColorFactor'));
	}
	/**
	* Base color / albedo; sRGB hexadecimal color. See {@link Material.getBaseColorTexture getBaseColorTexture}.
	*/
	public setBaseColorHex(hex: number): this {
	const factor = this.get('baseColorFactor').slice() as vec4;
	return this.set('baseColorFactor', ColorUtils.hexToFactor(hex, factor));
	}

In v4, perhaps the hexadecimal-based getters/setters should be deprecated or removed, leaving just factors. Conversion to/from hex is easy with https://gltf-transform.dev/modules/core/classes/ColorUtils.

[donmccurdy]

I'll deprecate these methods in v3.10, and remove them in v4.0.