ASE File Format (3D Models and Meshes)

// Function to load ASE file
function loadASEFile(fileData) {
    // Split file data into lines
    const lines = fileData.split('\n');

// Initialize variables to store parsed data
    let vertices = [];
    let faces = [];
    let currentMaterial = null;
    let materials = [];
    textureCoords = [];

// Loop through each line in the file
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i].trim();
        //console.log( 'line:', line );

// Skip comments
        //if (line.startsWith('*')) {
        //    continue;
        //}

// Check for material definition
        if (line.startsWith('*MATERIAL')) {
            // Extract material name
            const materialName = line.split('"')[1];
            // Create new material object
            currentMaterial = {
                name: materialName,
                faces: []
            };
            // Push material object to materials array
            materials.push(currentMaterial);
        }

// Check for vertex definition
        if (line.startsWith('*MESH_VERTEX')) {
            // Extract vertex data
            const [, index, x, y, z] = line.split(' ');
            // Push vertex data to vertices array
            vertices.push({ x: parseFloat(x), y: parseFloat(y), z: parseFloat(z) });
        }

// Check for face definition
        if (line.startsWith('*MESH_FACE')) {
            // Extract face data
            const [, , v1, v2, v3] = line.split(' ');
            // Push face data to faces array
            faces.push({ v1: parseInt(v1), v2: parseInt(v2), v3: parseInt(v3), material: currentMaterial });
            // Store face in current material
            currentMaterial.faces.push(faces.length - 1);
        }
    
    // Check for texture coordinate definition
        if (line.startsWith('*MESH_TVERT')) {
            // Extract texture coordinate data
            const [, index, u, v, w] = line.split(' ');
            // Push texture coordinate data to textureCoords array
            textureCoords.push({ u: parseFloat(u), v: parseFloat(v), w: parseFloat(w) });
        }

// Return parsed data
    return { vertices, faces };
}

// Example usage
const aseData = `
*3DSMAX_ASCIIEXPORT 200
*COMMENT "Generated by 3ds Max"
*SCENE {
*SCENE_FILENAME "Untitled.max"
*SCENE_FIRSTFRAME 0
*SCENE_LASTFRAME 100
*SCENE_FRAMESPEED 30
*SCENE_TICKSPERFRAME 160
*SCENE_BACKGROUND_STATIC 0.0000 0.0000 0.0000
*SCENE_AMBIENT_STATIC 0.0000 0.0000 0.0000
*SCENE_AMBIENT_ANIM 0.0000 0.0000 0.0000
}
*MATERIAL_LIST {
*MATERIAL_COUNT 1
*MATERIAL 0 {
*MATERIAL_NAME "Material #2"
*MATERIAL_CLASS "Standard"
*MATERIAL_DIFFUSE 0.8000 0.8000 0.8000
*MATERIAL_SPECULAR 0.0000 0.0000 0.0000
*MATERIAL_SHINE 0.0000
*MATERIAL_SHINESTRENGTH 0.0000
*MATERIAL_TRANSPARENCY 0.0000
*MATERIAL_WIRESIZE 1.0000
*MATERIAL_SHADING Blinn
*MATERIAL_XP_FALLOFF 0.0000 0.0000
*MATERIAL_SELFILLUM 0.0000
*MATERIAL_FALLOFF In
*MATERIAL_XP_TYPE Filter
*MATERIAL_COLOR 0.5882 0.5882 0.5882
*MATERIAL_MAP_DIFFUSE {
*MAP_NAME ""
*MAP_CLASS "Bitmap"
*MAP_SUBNO 1
*MAP_AMOUNT 1.0000
*BITMAP "texture.jpg"
}
}
}
*MESH "Box01" {
*MESH_VERTEX_LIST {
*MESH_VERTEX 0 1.0000 1.0000 0.0000
*MESH_VERTEX 1 1.0000 -1.0000 0.0000
*MESH_VERTEX 2 -1.0000 -1.0000 0.0000
*MESH_VERTEX 3 -1.0000 1.0000 0.0000
*MESH_VERTEX 4 1.0000 1.0000 2.0000
*MESH_VERTEX 5 1.0000 -1.0000 2.0000
*MESH_VERTEX 6 -1.0000 -1.0000 2.0000
*MESH_VERTEX 7 -1.0000 1.0000 2.0000
}
*MESH_FACE_LIST {
*MESH_FACE 0: A: 0 B: 1 C: 2 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
*MESH_FACE 1: A: 2 B: 3 C: 0 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
*MESH_FACE 2: A: 4 B: 5 C: 6 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
*MESH_FACE 3: A: 6 B: 7 C: 4 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
*MESH_FACE 4: A: 0 B: 4 C: 7 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
*MESH_FACE 5: A: 7 B: 3 C: 0 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
*MESH_FACE 6: A: 1 B: 5 C: 6 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
*MESH_FACE 7: A: 6 B: 2 C: 1 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
*MESH_FACE 8: A: 0 B: 4 C: 5 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
*MESH_FACE 9: A: 5 B: 1 C: 0 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
*MESH_FACE 10: A: 3 B: 7 C: 6 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
*MESH_FACE 11: A: 6 B: 2 C: 3 AB: 1 BC: 1 CA: 1 *MESH_SMOOTHING 1  *MESH_MTLID 0
}
*MESH_NUMTVERTEX 4
*MESH_TVERTLIST {
*MESH_TVERT 0 0.0 0.0 0.0
*MESH_TVERT 1 1.0 0.0 0.0
*MESH_TVERT 2 1.0 1.0 0.0
*MESH_TVERT 3 0.0 1.0 0.0
}
}
`;

//
let ase = loadASEFile( aseData  );

console.log( ase.vertices.length );
console.log( ase.faces.length );

Example Basic ASE Loader (Vertices/Faces)

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