I try to import 3ds objects using 3ds import classes that I found on the net, but import is very slow (minutes)
Is it normal (I'm talking about very simple 3ds)?
thanks
bye
Hi!
Why not using MaxToJme and loading the resulting file? It is faster. I succeeded in loading huge maps (500000 triangles) in less than 30 seconds on my poor machine.
I've found this
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URISyntaxException;
import com.jme.bounding.BoundingBox;
import com.jme.scene.Spatial;
import com.jme.util.export.binary.BinaryImporter;
import com.jme.util.resource.ResourceLocatorTool;
import com.jme.util.resource.SimpleResourceLocator;
import com.jmex.model.converters.FormatConverter;
import com.jmex.model.converters.MaxToJme; //.3ds
public class ModelLoader {
static final FormatConverter CONVERTER_3DS = new MaxToJme();
/**
* Imports a .3ds model from file system. Like the 2-argument method
* with a null textureDir. The texture file(s) are assumed to be in the
* same directory as the model file.
* @param modelPath the path to the model file.
* Can be relative to the project directory.
* @return a Spatial containing the model geometry
* (with provided texture, if any) that can be attached to
* the scenegraph, or null instead if unable to load geometry.
*/
public static Spatial load3ds(String modelPath) {
return load3ds(modelPath, null);
}
/**
* Imports a .3ds model from file system.
* @param modelPath the path to the model file.
* Can be relative to the project directory.
* @param textureDir the path to the directory with the model's
* textures. If null, this will attempt to infer textureDir from
* modelPath, which assumes that the texture file(s) are in the same
* directory as the model file.
* @return a Spatial containing the model geometry
* (with provided texture, if any) that can be attached to
* the scenegraph, or null instead if unable to load geometry.
*/
public static Spatial load3ds(String modelPath, String textureDir) {
Spatial output = null; // the geometry will go here.
final ByteArrayOutputStream outStream =
new ByteArrayOutputStream(); // byte array streams don't have to be closed
try {
final File textures;
if(textureDir != null) { // set textureDir location
textures = new File( textureDir );
} else {// try to infer textureDir from modelPath.
textures = new File(
modelPath.substring(0, modelPath.lastIndexOf('/')) );
} // Add texture URL to auto-locator
final SimpleResourceLocator location =
new SimpleResourceLocator(textures.toURI().toURL());
ResourceLocatorTool.addResourceLocator(
ResourceLocatorTool.TYPE_TEXTURE, location );
// read .3ds file into memory & convert it to a jME usable format.
final FileInputStream rawIn = new FileInputStream(modelPath);
CONVERTER_3DS.convert(rawIn, outStream);
rawIn.close(); // FileInputStream s must be explicitly closed.
// prepare outStream for loading.
final ByteArrayInputStream convertedIn =
new ByteArrayInputStream(outStream.toByteArray());
// import the converted stream to jME as a Spatial
output = (Spatial) BinaryImporter.getInstance().load(convertedIn);
} catch (FileNotFoundException e) {
e.printStackTrace();
System.err.println("File not found at: " + modelPath);
} catch (IOException e) {
e.printStackTrace();
System.err.println("Unable read model at: " + modelPath);
} catch (URISyntaxException e) {
e.printStackTrace();
System.err.println("Invalid texture location at:" + textureDir);
} /*
* The bounding box is an important optimization.
* There is no point in rendering geometry outside of the camera's
* field of view. However, testing whether each individual triangle
* is visible is nearly as expensive as actually rendering it. So you
* don't test every triangle. Instead, you just test the bounding box.
* If the box isn't in view, don't bother looking for triangles inside.
*/
output.setModelBound(new BoundingBox());
output.updateModelBound();
return output;
}
}
Do I have to convert them before in other formats?
Or my models aren't so simple ? (23000 vertices)
bye
As you probably expected it's not normal. How are you loading the 3ds file?
gouessej said:
Hi!
Why not using MaxToJme and loading the resulting file? It is faster. I succeeded in loading huge maps (500000 triangles) in less than 30 seconds on my poor machine.
I've reduced vertices (where they weren't necessary) and now the situation is quite good (less than a minute to load all)
bye
still, use ModelLoader to convert your models into .jme format and load those. MUCH MUCH faster!
dhdd said:
still, use ModelLoader to convert your models into .jme format and load those. MUCH MUCH faster!
Do you mean that I have to save all models with my ModelLoader class and then I have to import them in jme format?
I'll try thanks
well, when a model is finished by the artist i convert them to .jme and use and deploy only the .jme models after that.