如何在java3d中创建正确的对象模型转换？ [英] How to create a correct object model transformation in java3d?
本文介绍了如何在java3d中创建正确的对象模型转换？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我加载了一个对象模型（.obj），并创建了一个Map来列出我使用Blender分隔成部分的文件的内部对象，并调用它们来创建旋转。我确实看到了某种运动，但只有一次它可能只是一个小故障。一旦我可以创建动作，我就可以轻松调整所涉及的数学，但到目前为止我无法进行动作，我担心我的代码可能需要一些调整。我认为这是一个很小的东西我只是看了一眼。
对象模型从分离的模型中正确加载而没有错误。
I have an object model(.obj) loaded, and have created a Map to list the internal objects of the file that I have separated into parts using Blender, and call them to create rotations. I did see some kind of movement, but only once and it could've just been a glitch. Once I can create movement, I can easily tweak the math involved, but I can't get movement so far and I fear my code may need a few adjustments. I'm thinking it's something small that I'm just glancing past.
The object model loads correctly from the separated model with no errors.
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Frame;
import java.awt.GraphicsConfiguration;
import java.io.FileNotFoundException;
import java.util.Map;
import javax.media.j3d.Alpha;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.RotPosPathInterpolator;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Quat4f;
import javax.vecmath.Vector3d;
import javax.vecmath.Vector3f;
import com.sun.j3d.loaders.IncorrectFormatException;
import com.sun.j3d.loaders.ParsingErrorException;
import com.sun.j3d.loaders.Scene;
import com.sun.j3d.loaders.objectfile.ObjectFile;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.j3d.utils.universe.ViewingPlatform;
public class ObjectInteractive extends Frame {
private static final long serialVersionUID = 819877942509843369L;
/*
* IN ORDER TO LOAD THE OBJECT MODEL AFTER SEPARATING IT INTO PARTS IN
* BLENDER, JAVA3D REQUIRES YOU TO OPEN THE OBJECT IN A TEXT EDITOR AND ADD
* "#" IN FRONT OF EVERY OBJECT "o". COMMAND F TO SEARCH FOR TEXT "o" AND
* ENTER TO CYCLE, UNLESS IT PROVIDES YOU WITH ARROW KEYS
*
* eg.
*
* o gargoyle <------wrong
*
* # o gargoyle <------right
*/
{
GraphicsConfiguration graphicsConfigI = SimpleUniverse
.getPreferredConfiguration();
setLayout(new BorderLayout());
setTitle("Heavy Evil - Act I");
Canvas3D canvas3DI = new Canvas3D(graphicsConfigI);
canvas3DI.setSize(1200, 800);
canvas3DI.setVisible(true);
canvas3DI.setBackground(Color.BLACK);
add(canvas3DI);
ObjectFile loaderI = new ObjectFile(ObjectFile.LOAD_ALL);
loaderI.setFlags(ObjectFile.RESIZE);
Shape3D modelI = new Shape3D();
Scene modelSceneI = null;
try {
modelSceneI = loaderI.load("Images/untitled.obj");
modelI = (Shape3D) modelSceneI.getSceneGroup().getChild(0);
modelSceneI.getSceneGroup().removeChild(0);
modelI.getAppearance().getMaterial();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IncorrectFormatException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParsingErrorException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
@SuppressWarnings("unchecked")
Map<String, Shape3D> nameMap = modelSceneI.getNamedObjects();
Shape3D wings3d = nameMap.get("wings");
for (String wings : nameMap.keySet()) {
System.out.printf("Name: %s\n", wings);
}
BranchGroup root = modelSceneI.getSceneGroup();
root.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
root.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
root.removeAllChildren();
Color3f light1Color = new Color3f(1.8f, 0.1f, 0.1f);
BoundingSphere bounds =
new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
Vector3f light1Direction = new Vector3f(2.0f, 12.0f, -12.0f);
DirectionalLight light1
= new DirectionalLight(light1Color, light1Direction);
light1.setInfluencingBounds(bounds);
root.addChild(light1);
TransformGroup transformGroup = new TransformGroup();
transformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
transformGroup.setCapability(TransformGroup.ALLOW_CHILDREN_EXTEND);
transformGroup.addChild(wings3d);
Transform3D transforms = new Transform3D();
/* Creates rotation transforms for x, y and z axis */
Transform3D rotX = new Transform3D();
Transform3D rotY = new Transform3D();
Transform3D rotZ = new Transform3D();
rotX.rotX(15f); // +15 degrees on the X axis
rotY.rotY(30f); // +30 degrees on the Y axis
rotZ.rotZ(-20f); // -20 degrees on the Z axis
/* Combines all rotation transforms */
transforms.mul(rotX, rotY);
transforms.mul(transforms, rotZ);
/* Translation: translates 2 on X, 3 on Y and -10 on Z */
Vector3f translationVector = new Vector3f(2F, 3F, -1F);
transforms.setTranslation(translationVector);
/* Non uniform scaling: scales 3x on X, 1x on Y and 2x on Z */
Vector3d scale = new Vector3d(0D, 0D, 0D);
transforms.setScale(scale);
/* Apply all transformations */
TransformGroup wings = new TransformGroup();
TransformGroup teeth = new TransformGroup();
TransformGroup gargoyle = new TransformGroup();
TransformGroup eyes = new TransformGroup();
TransformGroup object = new TransformGroup();
TransformGroup bar = new TransformGroup();
TransformGroup box = new TransformGroup();
TransformGroup hornOther = new TransformGroup();
transformGroup.addChild(gargoyle);
gargoyle.addChild(wings3d);
object.addChild(nameMap.get("Object01"));
bar.addChild(nameMap.get("cone"));
box.addChild(nameMap.get("box"));
eyes.addChild(nameMap.get("eye_left"));
eyes.addChild(nameMap.get("eye_right"));
hornOther.addChild(nameMap.get("gargoyle.001"));
hornOther.addChild(nameMap.get("gargoyle.002"));
wings.addChild(nameMap.get("gargoyle.003"));
wings.addChild(nameMap.get("gargoyle.004"));
teeth.addChild(nameMap.get("gargoyle.005"));
teeth.addChild(nameMap.get("gargoyle.006"));
teeth.addChild(nameMap.get("gargoyle.007"));
teeth.addChild(nameMap.get("gargoyle.008"));
teeth.addChild(nameMap.get("gargoyle.009"));
teeth.addChild(nameMap.get("gargoyle.010"));
teeth.addChild(nameMap.get("gargoyle.011"));
teeth.addChild(nameMap.get("gargoyle.012"));
teeth.addChild(nameMap.get("gargoyle.013"));
teeth.addChild(nameMap.get("gargoyle.014"));
teeth.addChild(nameMap.get("gargoyle.015"));
teeth.addChild(nameMap.get("gargoyle.016"));
teeth.addChild(nameMap.get("gargoyle.017"));
teeth.addChild(nameMap.get("gargoyle.018"));
teeth.addChild(nameMap.get("gargoyle.019"));
teeth.addChild(nameMap.get("gargoyle.020"));
teeth.addChild(nameMap.get("gargoyle.021"));
teeth.addChild(nameMap.get("gargoyle.022"));
teeth.addChild(nameMap.get("gargoyle.023"));
teeth.addChild(nameMap.get("gargoyle.024"));
teeth.addChild(nameMap.get("gargoyle.025"));
teeth.addChild(nameMap.get("gargoyle.026"));
teeth.addChild(nameMap.get("gargoyle.027"));
teeth.addChild(nameMap.get("gargoyle.028"));
teeth.addChild(nameMap.get("gargoyle.029"));
teeth.addChild(nameMap.get("gargoyle.030"));
teeth.addChild(nameMap.get("gargoyle.031"));
teeth.addChild(nameMap.get("gargoyle.032"));
teeth.addChild(nameMap.get("gargoyle.033"));
teeth.addChild(nameMap.get("gargoyle.034"));
teeth.addChild(nameMap.get("gargoyle.035"));
teeth.addChild(nameMap.get("gargoyle.036"));
teeth.addChild(nameMap.get("gargoyle.037"));
teeth.addChild(nameMap.get("gargoyle.038"));
teeth.addChild(nameMap.get("gargoyle.039"));
teeth.addChild(nameMap.get("gargoyle.040"));
teeth.addChild(nameMap.get("gargoyle.041"));
teeth.addChild(nameMap.get("gargoyle.042"));
teeth.addChild(nameMap.get("gargoyle.043"));
teeth.addChild(nameMap.get("gargoyle.044"));
teeth.addChild(nameMap.get("gargoyle.045"));
teeth.addChild(nameMap.get("gargoyle.046"));
teeth.addChild(nameMap.get("gargoyle.047"));
teeth.addChild(nameMap.get("gargoyle.048"));
teeth.addChild(nameMap.get("gargoyle.049"));
teeth.addChild(nameMap.get("gargoyle.050"));
teeth.addChild(nameMap.get("gargoyle.051"));
teeth.addChild(nameMap.get("gargoyle.052"));
teeth.addChild(nameMap.get("gargoyle.053"));
teeth.addChild(nameMap.get("gargoyle.054"));
teeth.addChild(nameMap.get("gargoyle.055"));
teeth.addChild(nameMap.get("gargoyle.056"));
/* Construct the groups */
gargoyle.addChild(teeth);
gargoyle.addChild(wings);
gargoyle.addChild(eyes);
gargoyle.addChild(object);
gargoyle.addChild(bar);
gargoyle.addChild(hornOther);
gargoyle.addChild(box);
root.addChild(modelI);
root.addChild(transformGroup);
Transform3D t3dI = new Transform3D();
t3dI.lookAt(new Point3d(0, 0, 4), new Point3d(0, 0, 0), new Vector3d(0,
1, 0));
t3dI.invert();
Alpha alphaNave = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0, 6000, 0,
0, 0, 0, 0);
float[] alphas = { 0.0f, 0.25f, 0.50f, 0.75f, 1.0f };
Quat4f[] quats = new Quat4f[5];
Point3f[] positions = new Point3f[5];
gargoyle.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
gargoyle.setCapability(TransformGroup.ALLOW_CHILDREN_EXTEND);
teeth.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
wings.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
eyes.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
object.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
bar.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
hornOther.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
box.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
quats[0] = new Quat4f(0.0f, 1.0f, 0.0f, (float) Math.toRadians(0));
quats[1] = new Quat4f(0.0f, 1.0f, 0.0f, (float) Math.toRadians(90));
quats[2] = new Quat4f(0.0f, 1.0f, 0.0f, (float) Math.toRadians(180));
quats[3] = new Quat4f(0.0f, 1.0f, 0.0f, (float) Math.toRadians(270));
quats[4] = quats[0];
positions[0] = new Point3f(-20.0f, 0.0f, 20.0f);
positions[1] = new Point3f(-20.0f, 0.0f, -20.0f);
positions[2] = new Point3f(20.0f, 0.0f, -20.0f);
positions[3] = new Point3f(20.0f, 0.0f, 20.0f);
positions[4] = positions[0];
RotPosPathInterpolator rotPosPath = new RotPosPathInterpolator(
alphaNave, wings, t3dI, alphas, quats, positions);
gargoyle.addChild(rotPosPath);
transforms.rotX(Math.PI / 2.f);
rotPosPath.setSchedulingBounds(bounds);
root.compile();
SimpleUniverse universeI = new SimpleUniverse(canvas3DI);
universeI.getViewingPlatform().setNominalViewingTransform();
ViewingPlatform viewPlatformI = universeI.getViewingPlatform();
TransformGroup viewTransformI = viewPlatformI
.getViewPlatformTransform();
viewTransformI.setTransform(t3dI);
universeI.addBranchGraph(root);
}
public static void main(String[] args) {
ObjectInteractive frameObj = new ObjectInteractive();
frameObj.setSize(1200, 800);
frameObj.setVisible(true);
}
}
我的尝试：
我有以下错误，因为程序正在运行。
What I have tried:
I have the following error, as the program is left running.
Sep 6 00:55:10 B34T-T3CHN1C14N.local java[760] <error>: CGContextSetBaseCTM: invalid context 0x0
Sep 6 00:56:10 B34T-T3CHN1C14N.local java[760] <error>: CGContextGetCTM: invalid context 0x0
Sep 6 00:56:10 B34T-T3CHN1C14N.local java[760] <error>: CGContextSetBaseCTM: invalid context 0x0
Sep 6 00:56:13 B34T-T3CHN1C14N.local java[760] <error>: CGContextGetCTM: invalid context 0x0
Sep 6 00:56:13 B34T-T3CHN1C14N.local java[760] <error>: CGContextSetBaseCTM: invalid context 0x0
Sep 6 00:57:25 B34T-T3CHN1C14N.local java[760] <error>: CGContextGetCTM: invalid context 0x0
Sep 6 00:57:25 B34T-T3CHN1C14N.local java[760] <error>: CGContextSetBaseCTM: invalid context 0x0
Sep 6 00:57:29 B34T-T3CHN1C14N.local java[760] <error>: CGContextGetCTM: invalid context 0x0
Sep 6 00:57:29 B34T-T3CHN1C14N.local java[760] <error>: CGContextSetBaseCTM: invalid context 0x0
我试图移动轮换在SimpleUniverse创建之下，但无济于事。我从下到上构建了代码并创建了ObjectLoader。请随时查看我的github。
https://github.com/GettingNifty/Heavy-Evil
我目前正在阅读图形编程基础：在JOGL和Java 3D中，完成本书之后，它并没有真正触及层次模型转换。我正在使用以下教程。
http://www.daltonfilho.com/articles/java3d/
I've tried to move the rotation below the SimpleUniverse creation but to no avail. I've built the code from the bottom up and created the ObjectLoader as well. Please feel free to look at my github.
https://github.com/GettingNifty/Heavy-Evil
I'm currently reading Foundations of Graphics Programming:In JOGL and Java 3D and after having finished the book, it doesn't really touch on Hierarchical model transformations. I'm using the following tutorial.
http://www.daltonfilho.com/articles/java3d/
推荐答案
解决方案是简单地将我的Transform3D t3dI移到我的Transform3D变换之下，删除t3dI实例，因为我意外地创建了一个副本并将t3dI的所有实例更改为变换。最后在我的路上。
The solution was to simply move my Transform3D t3dI up below my Transform3D transforms, delete the t3dI instance as I accidentally created a duplicate and change all instances of t3dI to transforms. Finally on my way.
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