import 3D model using javafx

elattar · Aug 14, 2016 5:52AM

I'm currently working on importing a 3D model (obj file) using JavaFX.

first, i read the obj file and save its content in float arrays (vertices, normals, textures) and integer array for (faces).

for example:

In vertices the file contains:

v 3.227124 -0.065127 -1.000000

v 3.227124 -0.065127 1.000000

i save them in array like that: [3.227124,-0.065127,-1.000000,3.227124,-0.065127,1.000000].

and same for textures and normals.

while for faces: the file contains:

f 509/413/144 91/405/139 94/409/143

f 508/410/3 95/408/142 96/407/141

i save them in integer array as [509,413,144,91,405,139,94,409,143,508,410,3,95,408,142,96,407,141]

Now, i used javafx to draw the model using trianglemshes, but unfortunately the scene is empty and nothing is drawn.

would anybody help me to solve this problem and suggest for me a solution or links for a tutorial or a book.

This is the Code:

public class TriangleMeshes extends Application { private PerspectiveCamera camera; private final double sceneWidth = 1000; private final double sceneHeight = 700; private double scenex, sceney = 0; private double fixedXAngle, fixedYAngle = 0; private final DoubleProperty angleX = new SimpleDoubleProperty(0); private final DoubleProperty angleY = new SimpleDoubleProperty(0); private double anchorAngleX = 0; private double anchorAngleY = 0; @Override public void start(Stage primaryStage) throws Exception { // Build the Scene and Camera Group sceneRoot = new Group(); Scene scene = new Scene(sceneRoot, sceneWidth, sceneHeight); //scene.setFill(Color.BLACK); PerspectiveCamera camera = new PerspectiveCamera(true); camera.setNearClip(0.1); camera.setFarClip(10000.0); camera.setTranslateZ(-1000); scene.setCamera(camera); primaryStage.setTitle("Model 3D Object"); primaryStage.setScene(scene); primaryStage.show(); // Create the object with a color and add it to the Scene Group obj = buildObject(Color.RED, false, false); obj.setRotationAxis(Rotate.Y_AXIS); obj.setRotate(45); obj.setTranslateX(-100); Group objectGroup = new Group(obj); // Add a Mouse Handler for Rotation Rotate xRotate = new Rotate(0, Rotate.X_AXIS); Rotate yRotate = new Rotate(0, Rotate.Y_AXIS); objectGroup.getTransforms().addAll(xRotate,yRotate); // Use Binding so your rotation doesn't have to be recreated xRotate.angleProperty().bind(angleX); yRotate.angleProperty().bind(angleY); // Tracking mouse movements only when a button is pressed scene.setOnMousePressed(event -> { scenex = event.getSceneX(); sceney = event.getSceneY(); anchorAngleX = angleX.get(); anchorAngleY = angleY.get(); }); // change angle when the button is pressed scene.setOnMouseDragged(event -> { angleX.set(anchorAngleX - (scenex - event.getSceneY())); angleY.set(anchorAngleY + sceney - event.getSceneX()); }); sceneRoot.getChildren().addAll(objectGroup); } private Group buildObject(Color color, boolean ambient, boolean fill) throws IOException { // Create object from ObjLoader class to create model containing vertices, normals, textures, and faces ObjLoader ol = new ObjLoader(); Model m = ol.loadModel("stall"); final TriangleMesh mesh = new TriangleMesh(); mesh.getPoints().addAll(m.getVertices()); // [3.227124,-0.065127,-1.000000,3.227124,-0.065127,1.000000, ...] mesh.getTexCoords().addAll(m.getTextures()); mesh.getFaces().addAll(m.getFaces()); // [509,413,144,91,405, ...] //mesh.getNormals().addAll(m.getNormals()); MeshView meshView = new MeshView(mesh); meshView.setDrawMode(DrawMode.LINE); meshView.setCullFace(CullFace.BACK); Group objGroup = new Group(); objGroup.getChildren().add(meshView); if(null != color) { PhongMaterial material = new PhongMaterial(color); meshView.setMaterial(material); } if(ambient) { AmbientLight light = new AmbientLight(Color.WHITE); light.getScope().add(meshView); objGroup.getChildren().add(light); } if(fill) { meshView.setDrawMode(DrawMode.FILL); } return objGroup; } public static void main(String[] args) { launch(args); }

}

Thanks in advance.

bouye-JavaNet · Aug 21, 2016 6:15PM

FYI InteractiveMesh.org provides some import filters for common 3D files. Source code is not provided though.

You could check if something displays while using their importer instead of yours. If nothing shows, then it's most likely the way you've setup the scene or its content.

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