问题
I'd need to have the complete model use a default material (e.g. grey color) and then use externally defined materials for each node.
So I'm looking for some advice on two points: 1) Setting a default material on all nodes. 2) Setting the material / color for given nodes after they're fetched from an external source.
Could this be done at some point before the model is loaded into the viewer? (i.e. server-side)? If not, can it be done in the viewer?
回答1:
All geometry coming from Forge will always have some material defined for it, but you can iterate over dbIDs of all objects on the model and set a custom THREE.js material for them using something along these lines:
function setCustomMaterial(viewer, dbids) {
const material = new THREE.MeshPhongMaterial({
color: 0xAB00EE,
specular: 0xEEABEE
});
viewer.impl.matman().addMaterial('CustomMaterial', material, true);
const fragList = viewer.model.getFragmentList();
const instanceTree = viewer.model.getData().instanceTree;
for (let dbid of dbids) {
instanceTree.enumNodeFragments(dbid, function(frag) {
fragList.setMaterial(frag, material);
});
}
}
来源:https://stackoverflow.com/questions/54475341/default-material-for-model-in-forge-viewer