Model Extractor

// remove existing download container (if re-running)
const element = document.getElementById('DOWNLOADS_CONTAINER');
if(element) element.remove();

// make container for download links
const downloadsContainer = document.body.appendChild(document.createElement('div'));
downloadsContainer.id = "DOWNLOADS_CONTAINER";
downloadsContainer.style.background = 'white';
downloadsContainer.style.padding = '1rem';
downloadsContainer.style.display = 'flex';
downloadsContainer.style.flexDirection = 'column';
downloadsContainer.style.position = 'absolute';
downloadsContainer.style.zIndex = 1000;



const makeModelOBJDownload = (meshId, fileName, downloadText) => {
    const mesh = meshManager.getMeshById(meshId);

    let objData = '';

    for(var i = 0; i < mesh.verts.length; i += 3) {
        objData += `v ${mesh.verts[i]} ${mesh.verts[i + 1]} ${mesh.verts[i + 2]}\n`;
    }

    for(var i = 0; i < mesh.origNormals.length; i += 3) {
        objData += `vn ${mesh.origNormals[i]} ${mesh.origNormals[i + 1]} ${mesh.origNormals[i + 2]}\n`;
    }

    for(var i = 0; i < mesh.origIdx.length; i += 3) {
        objData += `f ${mesh.origIdx[i]+1} ${mesh.origIdx[i + 1]+1} ${mesh.origIdx[i + 2]+1}\n`;
    }

    const aObj = downloadsContainer.appendChild(document.createElement('a'));
    aObj.download = fileName;
    aObj.href = `data:text/plain;charset=utf-8,${encodeURIComponent(objData)}`;
    aObj.innerHTML = downloadText;
}


// make downloads for teeth
for(var toothNumber of project.visualSetups[0].teeth) {
    const meshId = project.visualSetups[0].teethMeshesId[toothNumber];
    makeModelOBJDownload(
        meshId,
        `tooth${toothNumber}.obj`,
        `Download OBJ tooth ${toothNumber}`,
    );
}

// make download for upper jaw
makeModelOBJDownload(
    project.visualSetups[0].upperJawMeshId,
    `upperJaw.obj`,
    `Download OBJ upper jaw`,
);

// make download for lower jaw
makeModelOBJDownload(
    project.visualSetups[0].lowerJawMeshId,
    `lowerJaw.obj`,
    `Download OBJ lower jaw`,
);