我正在使用JOGL并且有一个glcanvas我正在渲染。然而，它只是闪红色然后变黑。我尝试使用不同的示例代码，它也是如此。 这是我的显示功能，如果有任何问题请告诉我！
public static void display(GLAutoDrawable drawable)
{
System.out.println("Runnning display");
GL2 gl = drawable.getGL().getGL2();
// Clear screen
gl.glClearColor(1, 0, 1, 0.5f); // Purple
gl.glClear(GL2.GL_STENCIL_BUFFER_BIT | GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
int [] vbo_handles = new int[2];
gl.glGenBuffers(2, vbo_handles, 0);
gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
float[] vertices = { 0.0f, 1.0f, 0.0f, //Top
-1.0f, -1.0f, 0.0f, //Bottom Left
1.0f, -1.0f, 0.0f //Bottom Right
};
FloatBuffer fbVertices = Buffers.newDirectFloatBuffer(vertices);
gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, vbo_handles[VERTICES_IDX]);
int numBytes = vertices.length*4;
gl.glBufferData(GL.GL_ARRAY_BUFFER, numBytes, fbVertices, GL.GL_STATIC_DRAW);
// Associate Vertex attribute 0 with the last bound VBO
gl.glVertexAttribPointer(0 /* the vertex attribute */, 3,
GL2.GL_FLOAT, false /* normalized? */, 0 /* stride */,
0 /* The bound VBO data offset */);
// VBO
gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, 0); // You can unbind the VBO after it have been associated using glVertexAttribPointer
gl.glEnableVertexAttribArray(0);
float[] colors = { 1.0f, 0.0f, 0.0f, 1.0f, //Top color (red)
0.0f, 0.0f, 0.0f, 1.0f, //Bottom Left color (black)
1.0f, 1.0f, 0.0f, 0.9f //Bottom Right color (yellow) with 10% transparence
};
FloatBuffer fbColors = Buffers.newDirectFloatBuffer(colors);
// Select the VBO, GPU memory data, to use for colors
gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, vboHandles[COLOR_IDX]);
numBytes = colors.length * 4;
gl.glBufferData(GL.GL_ARRAY_BUFFER, numBytes, fbColors, GL.GL_STATIC_DRAW);
fbColors = null; // It is OK to release CPU color memory after transfer to GPU
//Associate Vertex attribute 1 with the last bound VBO
gl.glVertexAttribPointer(1 /* the vertex attribute */, 4 /* four possitions used for each vertex */,
GL2.GL_FLOAT, false /* normalized? */, 0 /* stride */,
0 /* The bound VBO data offset */);
gl.glEnableVertexAttribArray(1);
gl.glDrawArrays(GL2.GL_TRIANGLES, 0, 3); //Draw the vertices as triangle
gl.glDisableVertexAttribArray(0); // Allow release of vertex position memory
}
}
It seems like it isn't calling the display function for the GLEventListener.
public class UserInterface implements GLEventListener{
private JTree tree;
JPopupMenu popupmenu;
JFrame frame = new JFrame("NecroTEK 3D Game Graphics Engine");
public void initUI()
{
System.out.println("Initializing UI");
TreeDemo();
//JFrame frame = new JFrame("NecroTek 3D Game Modeling Engine");
JPopupMenu popupMenu = new JPopupMenu();
popupMenu.setSize(200, 400);
popupMenu.setBackground(Color.black);
popupMenu.setForeground(Color.white);
popupMenu.setBorder(BorderFactory.createLineBorder(Color.white));
/**********MENUBAR - TOP MENU***************/
JMenuBar menuBar = new JMenuBar();
menuBar.setLayout(new BoxLayout(menuBar, BoxLayout.X_AXIS));
JMenu fileMenu = new JMenu("File");
fileMenu.setFont(new Font("Arial", Font.BOLD, 10));
fileMenu.setToolTipText("Load and Save Projects and Scenes");
JMenu EditMenu = new JMenu("Edit");
EditMenu.setFont(new Font("Arial", Font.BOLD, 10));
EditMenu.setToolTipText("Cut, Copy and Paste");
JMenu ViewMenu = new JMenu("View");
ViewMenu.setFont(new Font("Arial", Font.BOLD, 10));
JMenuItem clear = new JMenuItem("Clear");
clear.setFont(new Font("Arial", Font.BOLD, 10));
JMenuItem fullscreen = new JMenuItem("Fullscreen");
fullscreen.setFont(new Font("Arial", Font.BOLD, 10));
JMenu imagemode = new JMenu("Image Mode");
imagemode.setFont(new Font("Arial", Font.BOLD, 10));
JMenuItem bitmap = new JMenuItem("Bitmap");
bitmap.setFont(new Font("Arial", Font.BOLD, 10));
JMenuItem greyscale = new JMenuItem("Greyscale");
greyscale.setFont(new Font("Arial", Font.BOLD, 10));
JMenuItem rgbcolor = new JMenuItem("RGB Color");
rgbcolor.setFont(new Font("Arial", Font.BOLD, 10));
JMenuItem cmykcolor = new JMenuItem("CMYK Color");
cmykcolor.setFont(new Font("Arial", Font.BOLD, 10));
JMenuItem eightbitchannel = new JMenuItem("8 bit channel");
eightbitchannel.setFont(new Font("Arial", Font.BOLD, 10));
JMenuItem sixteenbitchannel = new JMenuItem("16 bit channel");
sixteenbitchannel.setFont(new Font("Arial", Font.BOLD, 10));
JMenuItem thirtytwobitchannel = new JMenuItem("32 bit channel");
thirtytwobitchannel.setFont(new Font("Arial", Font.BOLD, 10));
imagemode.add(bitmap);
imagemode.add(greyscale);
imagemode.add(rgbcolor);
imagemode.add(cmykcolor);
imagemode.add(eightbitchannel);
imagemode.add(sixteenbitchannel);
imagemode.add(thirtytwobitchannel);
ViewMenu.add(imagemode);
JMenu shadingMenu = new JMenu("Shading");
shadingMenu.setFont(new Font("Arial", Font.BOLD, 10));
JMenuItem smooth = new JMenuItem("Smooth");
smooth.setFont(new Font("Arial", Font.BOLD, 10));
JMenuItem flat = new JMenuItem("Flat");
flat.setFont(new Font("Arial", Font.BOLD, 10));
shadingMenu.add(smooth );
smooth.setFont(new Font("Arial", Font.BOLD, 10));
shadingMenu.add(flat );
ViewMenu.add(shadingMenu);
JMenuItem renderpresets = new JMenuItem("Render Presets");
renderpresets.setFont(new Font("Arial", Font.BOLD, 10));
ViewMenu.add(renderpresets);
JMenu performance = new JMenu("Performance");
performance.setFont(new Font("Arial", Font.BOLD, 10));
JMenu mathperformance = new JMenu("Math");
mathperformance.setFont(new Font("Arial", Font.BOLD, 10));
So that's a stub of the UI function. The end of it is..
/**********************/
frame.setBounds(0, 0, 640, 480);
frame.setPreferredSize(new Dimension(1200,800));
frame.setResizable(false);
frame.setVisible( true );
mainScreen.setLayout(new FlowLayout());
left.setLayout(new FlowLayout());
right.setLayout(new FlowLayout());
bottom.setLayout(new FlowLayout());
/*
GLProfile glprofile = GLProfile.getDefault();
GLCapabilities glcapabilities = new GLCapabilities( glprofile );
final ` glcanvas = new GLCanvas( glcapabilities );
glcanvas.setMinimumSize(new Dimension(100,100));
glcanvas.setMaximumSize(new Dimension(100,100));
int z = 300;
int h = 300;
JPanel canvasPanel = new JPanel();
canvasPanel.add(glcanvas);
frame.getContentPane().add(glcanvas);
frame.setSize(frame.getContentPane().getPreferredSize());
frame.setVisible(true);
frame.setName("3D Line");
frame.setTitle("Necro3D World Editor");
frame.pack();
frame.setVisible(true);
*/
frame.setVisible(true);
frame.setName("3D Line");
frame.setTitle("Necro3D World Editor");
frame.pack();
frame.setVisible(true);
//addWindowListener(this);
JPanel toolPanel = new JPanel();
toolPanel.setLayout(new FlowLayout());
toolPanel.add(toolbar);
JPanel rightsidePanel = new JPanel();
rightsidePanel.add(right);
rightsidePanel.add(toolPanel);
frame.add(mainScreen, BorderLayout.CENTER);
frame.add(left, BorderLayout.LINE_START);
frame.add(rightsidePanel, BorderLayout.LINE_END);
frame.add(bottom, BorderLayout.PAGE_END);
frame.setBackground(Color.RED);
/ ************* OPENGL STUFF ****************** /
GLProfile glprofile = GLProfile.getDefault();
GLCapabilities glcapabilities = new GLCapabilities( glprofile );
final GLCanvas glcanvas = new GLCanvas( glcapabilities );
glcanvas.setMinimumSize(new Dimension(100,100));
glcanvas.setMaximumSize(new Dimension(100,100));
glcanvas.setBounds(0,0, 520, 320);
int z = 300;
int h = 300;
JPanel canvasPanel = new JPanel();
canvasPanel.add(glcanvas);
mainScreen.add(canvasPanel);
/*****************************************/
/**************DIALOGUES*************/
layersButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JPanel testPanel = new JPanel();
testPanel.setLayout(new GridLayout(20,20));
JLabel title = new JLabel("Select layer");
testPanel.add(title);
for (int i=0;i<40;i++)
{
JButton newbutton = new JButton(" ");
newbutton.setSize(new Dimension(10,10));
newbutton.setLayout(new FlowLayout());
testPanel.add(newbutton);
}
...
frame.add(mainScreen, BorderLayout.CENTER);
//frame.add(canvasPanel, BorderLayout.SOUTH);
frame.add(left, BorderLayout.LINE_START);
frame.add(rightsidePanel, BorderLayout.LINE_END);
frame.add(bottom, BorderLayout.PAGE_END);
frame.setBackground(Color.RED);
frame.setSize(500, 300);
//center the JFrame on the screen
//centerWindow(frame);
//
//4. Size the frame.
frame.pack();
//5. Show it.
frame.setVisible(true);
glcanvas.requestFocus();
System.out.println("Frame Set Visible")
JOptionPane.showMessageDialog(frame, testPanel);
}
});
...
@Override
public void display(GLAutoDrawable arg0) {
// TODO Auto-generated method stub
System.out.println("Display");
GLRenderer.display(arg0);
}
@Override
public void dispose(GLAutoDrawable arg0) {
// TODO Auto-generated method stub
System.out.println("Dispose");
}
@Override
public void init(GLAutoDrawable arg0) {
// TODO Auto-generated method stub
System.out.println("Init");
GLRenderer.init(arg0);
}
@Override
public void reshape(GLAutoDrawable arg0, int arg1, int arg2, int arg3, int arg4) {
// TODO Auto-generated method stub
System.out.println("Reshape");
}
/**************/
// An inner class to check whether mouse events are the popup trigger
class MousePopupListener extends MouseAdapter {
public void mousePressed(MouseEvent e) {
checkPopup(e);
}
public void mouseClicked(MouseEvent e) {
checkPopup(e);
}
public void mouseReleased(MouseEvent e) {
checkPopup(e);
}
private void checkPopup(MouseEvent e) {
if (e.isPopupTrigger()) {
popupmenu.show(popupmenu, e.getX(), e.getY());
}
}
}
// An inner class to show when popup events occur
class PopupPrintListener implements PopupMenuListener {
public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
System.out.println("Popup menu will be visible!");
}
public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
System.out.println("Popup menu will be invisible!");
}
public void popupMenuCanceled(PopupMenuEvent e) {
System.out.println("Popup menu is hidden!");
}`
}
}
没有GL侦听器正在执行。
答案 0 :(得分：1)
有些事似乎是错的：
display() glGenBuffers的新缓冲区
glEnableClientState已弃用display()将vertices vbo_handles[VERTICES_IDX]个glBufferData数据加载到vertices。如果vboHandles[COLOR_IDX]是静态的，则您不需要fbColors null是直接缓冲区，因此您无法通过将其分配给{{1}}来清除它，您必须执行this