Tilting a plane (in 3D) in the direction it's moving

I have a plane following the mouse cursor, and I want it to
tilt in the direction the mouse is moving. I'm getting these
numbers with my previousMouse variables. I'm getting the angle the
plane/cursor moves in based on this previous value and the current
value. I then try to apply the sin and cos to the rotationX and
rotationY. These are same math functions I would use if I were to
have an object move in the direction of the cursor.
I've attached code, player is the plane I'm moving/tilting.
Moving up and down kinda works (rotationX), but moving left and
right (rotationY) doesn't seem to do much. With this code, the rest
position (when not moving) is also rotated. I can fix this by
changing the rotationY line to player.rotationY =
Math.cos(previousMouseAngle) * 40 - 40;, but then going right
doesn't move it at all, and moving right moves it twice. It seems
to be a problem with the cosine of the angle returned by atan2 to
be 0 both when moving right and when not moving. What's the
problem? Am I using the completely wrong functions for what I
want?

That's not the same problem I'm having, but I'll use it to
give more details (I'm looking at the code in his first post). He's
using the keyboard to rotate a square, while I'm using the mouse.
Not only that but I want to rotate the square in relation to the
position of the mouse. Here's some scenarios:
cursor to the left of square, rotationY+
cursor to the right of square, rotationY-
cursor to the top of square, rotationX-
cursor to the top left of square, rotationY+ and rotationX-
cursor to the top right of square, rotationY- and rotationX-
I haven't listed all directions but you should get the point
by now. It's also not as simple as 8 directions, since I want 360
degree freedom. This is why I was trying to use atan2. if the
cursor is at an angle of 30 degrees. I want it to rotateY+ and
rotateX-, but there would be more rotationY than rotationX. Imagine
a UFO that's tilting in the direction it moves.

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How to change the direction of a moving object

I am trying to make a connect four program for class, and i am trying to make it so the red check piece move down. But instead it move left n right -.-, ive tried changing the coordinates but then the piece would just spin in circle or spins out of control. Here is the code i have right now, can someone help me please =D .
import java.awt.*;*
*public class Circle{*
*private int centerX, centerY, radius;*
*private Color color;*
*private int direction, velocity;*
*private boolean filled;*
*public Circle(int x, int y, int r, Color c){*
*centerX = x;*
*centerY = y;*
*radius = r;*
*color = c;*
*direction = 0;*
*velocity = 0;*
*filled = false;*
*public void draw(Graphics g){*
*Color oldColor = g.getColor();*
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*g.drawOval(centerX - radius, centerY - radius, radius* 2, radius *2);*
*g.setColor(oldColor);*
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*g.fillOval(centerX - radius, centerY - radius, radius* 2, radius *2);*
*g.setColor(oldColor);*
*public boolean containsPoint(int x, int y){*
*int xSquared = (x - centerX)* (x - centerX);
int ySquared = (y - centerY) *(y - centerY);*
*int radiusSquared = radius* radius;
return xSquared +ySquared - radiusSquared <= 0;+
+}+
+public void move(int xAmount, int yAmount){+
+centerX = centerX+ xAmount;
centerY = centerY +yAmount;+
+}+
+public int getRadius(){+
+return radius;+
+}+
+public int getX(){+
+return centerX;+
+}+
+public int getY(){+
+return centerY;+
+}+
+public void setVelocity(int v){+
+velocity = v;+
+}+
+public void setDirection(int d){+
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+}+
+public void turn(int degrees){+
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// Moves the circle in the current direction using its
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public void move(){
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import javax.swing.*;*
*import java.awt.*;
import java.awt.event.*;
public class ColorPanel extends JPanel{
private Circle circle;
private javax.swing.Timer timer;
public ColorPanel(Color backColor, int width, int height){
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timer.start();
public void paintComponent(Graphics g){
super.paintComponent(g);
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private class MoveListener implements ActionListener{
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int x = circle.getX();
int radius = circle.getRadius();
int width = getWidth();
// Check for boundaries and reverse direction
// if necessary
if (x - radius <= 0 || x + radius >= width)
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}with that code my circle just spins back n forth rapidly. How can i make it so it drop to a certain location everytime i click the mouse?

lilkenny1337 wrote:
I am trying to make a connect four program for class, and i am trying to make it so the red check piece move down.
How can i make it so it drop to a certain location everytime i click the mouse?Try this:
public class ColorPanel extends JPanel {
    private Circle circle;
    private Timer timer;
    private int stepX, stepY, xM, yM;
    public ColorPanel(final Color backColor, final int width, final int height) {
        setBackground(backColor);
        setPreferredSize(new Dimension(width, height));
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        circle = new Circle(25, height / 2, 25, Color.red);
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        // Aim due west to hit left boundary first
        circle.setDirection(90);
        // Move 5 pixels per unit of time
        circle.setVelocity(5);
        // Move every 5 milliseconds
        final MoveListener ml = new MoveListener();
        timer = new Timer(5, ml);
        addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(final MouseEvent e) {
                if (timer.isRunning()) {
                    return;
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                yM = e.getY();
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                int yC = circle.getY();
                stepX = (xM - xC) / 10;
                stepY = (yM - yC) / 10;
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    @Override
    public void paintComponent(final Graphics g) {
        super.paintComponent(g);
        circle.fill(g);
    private class MoveListener implements ActionListener {
        public void actionPerformed(final ActionEvent e) {
            if ((stepX > 0 && circle.getX() >= xM)
                    || (stepX < 0 && circle.getX() <= xM)) {
                stepX = 0;
            if ((stepY > 0 && circle.getY() >= yM)
                    || (stepY < 0 && circle.getY() <= yM)) {
                stepY = 0;
            if (stepX == 0 && stepY == 0) {
                timer.stop();
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/* add this method in the class "Circle":
    public void setLocation(int xM, int yM) {
        centerX = xM;
        centerY = yM;
            } else {
                circle.move(stepX, stepY);
            repaint();
}

How to use the direct material indicator in Plan Driven Procurement?

Dear Experts,
How the system determine the procurement as direct material procurement in Plan driven scenario? In case of manual shopping cart, the system determines the direct material /indirect material procurement based on the check box 'Order as direct material'
indicator.
Now in case of plan driven procurement, where the requisition comes from ECC system, there is no way to indicate in the MM system for direct material?
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Thanks and regards,
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Hi Ranjan,
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How to use the direct bytebuffer in JNI? Accessing JDBC from C application.

I am working on a project to access JDBC Driver within C application. The invocation JNI is used.
To get better performance, I use the preparedStatement for dynamic sql. This need to transfer much parameter data from C to JDBC for PreparedStatement object in JVM. I think this maybe get improvements by using the new direct bytebuffer function from JDK1.4. However I cannot find an example code to get start. Could someone provide some ideas for this?
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tzhouxian wrote:
thanks, jschell
I am trying to get the best performance for the solution, using JDBC libs in a C application. So I am considering to use the direct bytebuffer in the solution to pass parameters to JDBC and get result sets from JDBC side.
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Then I suggest you profile it.
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After delete file from documents the direct link still alive.

Hello.
I upload a image to the style libary folder, then i publish the file and delete him BUT the direct link to the image still work.
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Hi,
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Hello Thanks for your feedback.
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Much appreciated
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Tilting a plane (in 3D) in the direction it's moving

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