چگونه مدل های 3D را در جاوا دانلود کنیم

import com.aspose.threed.Scene;
import com.aspose.threed.Node;
import com.aspose.threed.Mesh;
import com.aspose.threed.Entity;
import com.aspose.threed.ObjLoadOptions;
import com.aspose.threed.GltfLoadOptions;
import com.aspose.threed.StlLoadOptions;

// Automatic format detection from the file extension
Scene scene = Scene.fromFile("model.obj");

Scene scene = new Scene();
scene.open("model.obj");

import com.aspose.threed.Scene;
import com.aspose.threed.Node;

public class SceneWalker {
    public static void main(String[] args) throws Exception {
        Scene scene = Scene.fromFile("model.obj");
        walkNode(scene.getRootNode(), 0);
    }

    static void walkNode(Node node, int depth) {
        String indent = "  ".repeat(depth);
        System.out.println(indent + "Node: " + node.getName());
        for (Node child : node.getChildNodes()) {
            walkNode(child, depth + 1);
        }
    }
}

import com.aspose.threed.Scene;
import com.aspose.threed.Node;
import com.aspose.threed.Entity;
import com.aspose.threed.Mesh;

Scene scene = Scene.fromFile("model.obj");

for (Node node : scene.getRootNode().getChildNodes()) {
    Entity entity = node.getEntity();
    if (entity instanceof Mesh) {
        Mesh mesh = (Mesh) entity;
        System.out.printf("Mesh '%s': %d vertices, %d polygons%n",
            node.getName(),
            mesh.getControlPoints().size(),
            mesh.getPolygonCount());

        // First vertex position (Vector4: x, y, z, w)
        if (!mesh.getControlPoints().isEmpty()) {
            var v = mesh.getControlPoints().get(0);
            System.out.printf("  First vertex: (%.4f, %.4f, %.4f)%n", v.x, v.y, v.z);
        }

        // First polygon: array of control-point indices
        if (!mesh.getPolygons().isEmpty()) {
            int[] poly = mesh.getPolygons().get(0);
            System.out.println("  First polygon indices: " + java.util.Arrays.toString(poly));
        }
    }
}

import com.aspose.threed.Scene;
import com.aspose.threed.ObjLoadOptions;

ObjLoadOptions options = new ObjLoadOptions();
options.setFlipCoordinateSystem(true);  // Convert right-hand Y-up to Z-up
options.setScale(0.01);                  // Convert centimetres to metres
options.setEnableMaterials(true);        // Load the .mtl material file alongside
options.setNormalizeNormal(true);        // Normalize all normals to unit length

Scene scene = Scene.fromFile("model.obj", options);

import com.aspose.threed.Scene;
import com.aspose.threed.GltfLoadOptions;

GltfLoadOptions options = new GltfLoadOptions();
options.setFlipCoordinateSystem(true);  // Flip the coordinate system if needed

Scene scene = Scene.fromFile("model.glb", options);

import com.aspose.threed.Scene;
import com.aspose.threed.StlLoadOptions;

StlLoadOptions options = new StlLoadOptions();
options.setFlipCoordinateSystem(true);
options.setRecalculateNormal(true);  // Recompute normals from face geometry

Scene scene = Scene.fromFile("model.stl", options);