djsundog/obj2gltf
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Add new optional command line parameter --doubleSidedMaterial to force materials to be rendered on both sides

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Chetan 2023-10-02 16:45:36 +08:00
parent dc2500a65c
commit fba3cdf4e9
4 changed files with 30 additions and 2 deletions
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1
README.md
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@ -114,6 +114,7 @@ As a convenience the PBR textures may be supplied directly to the command line.
| `--input-up-axis` | Up axis of the obj. | No | | `--input-up-axis` | Up axis of the obj. | No |
| `--output-up-axis` | Up axis of the converted glTF. | No | | `--output-up-axis` | Up axis of the converted glTF. | No |
| `--triangle-winding-order-sanitization` | Apply triangle winding order sanitization. | No | | `--triangle-winding-order-sanitization` | Apply triangle winding order sanitization. | No |
| `--doubleSidedMaterial` | Allow the material properties to be double-sided | No, default `false` |
## Build Instructions ## Build Instructions

6
bin/obj2gltf.js
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@ -160,6 +160,11 @@ const argv = yargs
type: "boolean", type: "boolean",
default: defaults.triangleWindingOrderSanitization, default: defaults.triangleWindingOrderSanitization,
}, },
doubleSidedMaterial: {
describe: "Allow the material properties to be double-sided",
type: "boolean",
default: defaults.doubleSidedMaterial,
},
}) })
.parse(args); .parse(args);
@ -216,6 +221,7 @@ const options = {
inputUpAxis: argv.inputUpAxis, inputUpAxis: argv.inputUpAxis,
outputUpAxis: argv.outputUpAxis, outputUpAxis: argv.outputUpAxis,
triangleWindingOrderSanitization: argv.triangleWindingOrderSanitization, triangleWindingOrderSanitization: argv.triangleWindingOrderSanitization,
doubleSidedMaterial: argv.doubleSidedMaterial,
}; };
console.time("Total"); console.time("Total");

10
lib/loadMtl.js
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@ -846,8 +846,13 @@ function createSpecularGlossinessMaterial(material, options) {
} else { } else {
const alpha = material.alpha; const alpha = material.alpha;
diffuseFactor[3] = alpha; diffuseFactor[3] = alpha;
if (options.doubleSidedMaterial) {
transparent = true;
} else {
transparent = alpha < 1.0; transparent = alpha < 1.0;
} }
}
if (defined(diffuseTexture)) { if (defined(diffuseTexture)) {
transparent = transparent || diffuseTexture.transparent; transparent = transparent || diffuseTexture.transparent;
@ -927,8 +932,13 @@ function createMetallicRoughnessMaterial(material, options) {
} else { } else {
const alpha = material.alpha; const alpha = material.alpha;
baseColorFactor[3] = alpha; baseColorFactor[3] = alpha;
if (options.doubleSidedMaterial) {
transparent = true;
} else {
transparent = alpha < 1.0; transparent = alpha < 1.0;
} }
}
if (defined(baseColorTexture)) { if (defined(baseColorTexture)) {
transparent = transparent || baseColorTexture.transparent; transparent = transparent || baseColorTexture.transparent;

11
lib/obj2gltf.js
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@ -40,6 +40,7 @@ module.exports = obj2gltf;
* @param {Logger} [options.logger] A callback function for handling logged messages. Defaults to console.log. * @param {Logger} [options.logger] A callback function for handling logged messages. Defaults to console.log.
* @param {Writer} [options.writer] A callback function that writes files that are saved as separate resources. * @param {Writer} [options.writer] A callback function that writes files that are saved as separate resources.
* @param {String} [options.outputDirectory] Output directory for writing separate resources when options.writer is not defined. * @param {String} [options.outputDirectory] Output directory for writing separate resources when options.writer is not defined.
* @param {Boolean} [options.doubleSidedMaterial=false] Allows materials to be double sided.
* @return {Promise} A promise that resolves to the glTF JSON or glb buffer. * @return {Promise} A promise that resolves to the glTF JSON or glb buffer.
*/ */
function obj2gltf(objPath, options) { function obj2gltf(objPath, options) {
@ -54,6 +55,10 @@ function obj2gltf(objPath, options) {
options.checkTransparency, options.checkTransparency,
defaults.checkTransparency defaults.checkTransparency
); );
options.doubleSidedMaterial = defaultValue(
options.doubleSidedMaterial,
defaults.doubleSidedMaterial
);
options.secure = defaultValue(options.secure, defaults.secure); options.secure = defaultValue(options.secure, defaults.secure);
options.packOcclusion = defaultValue( options.packOcclusion = defaultValue(
options.packOcclusion, options.packOcclusion,
@ -179,6 +184,12 @@ obj2gltf.defaults = {
* @default false * @default false
*/ */
checkTransparency: false, checkTransparency: false,
/**
* Gets and sets whether a material will be doubleSided or not
* @type Boolean
* @default false
*/
doubleSidedMaterial: false,
/** /**
* Gets or sets whether the source model can reference paths outside of its directory. * Gets or sets whether the source model can reference paths outside of its directory.
* @type Boolean * @type Boolean