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package demos.es1;
import java.nio.*;
import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import com.sun.opengl.impl.egl.*;
import com.sun.opengl.util.*;
public class RedSquare {
public static void main(String[] args) {
System.out.println("Basic.main()");
try {
System.out.println("GLDrawableFactory.getFactory()");
EGLDrawableFactory factory = (EGLDrawableFactory) GLDrawableFactory.getFactory();
/*
System.out.println("Testing getDirectBufferAddress");
factory.testGetDirectBufferAddress();
*/
System.out.println("EGLDrawableFactory.initialize()");
factory.initialize();
System.out.println("factory.createExternalGLContext()");
GLContext context = factory.createExternalGLContext();
// OpenGL context is current at this point
// The following is a no-op that is only needed to get the
// Java-level GLContext object set up in thread-local storage
System.out.println("context.makeCurrent()");
context.makeCurrent();
context.setGL(new DebugGL(context.getGL()));
GL gl = context.getGL();
GLU glu = new GLU();
//----------------------------------------------------------------------
// Code for GLEventListener.init()
//
System.out.println("Entering initialization");
// Size OpenGL to Video Surface
int width = 800;
int height = 480;
System.out.println("calling glViewport()");
// gl.glViewport(0, 0, width, height);
System.out.println("calling glMatrixMode()");
gl.glMatrixMode(GL.GL_PROJECTION);
System.out.println("calling glLoadIdentity()");
gl.glLoadIdentity();
System.out.println("calling gluPerspective()");
glu.gluPerspective(45.0f, (float)width / (float)height, 1.0f, 100.0f);
System.out.println("calling glMatrixMode()");
gl.glMatrixMode(GL.GL_MODELVIEW);
System.out.println("Intialized matrices");
// Allocate vertex arrays
// FloatBuffer colors = BufferUtil.newFloatBuffer(12);
// FloatBuffer vertices = BufferUtil.newFloatBuffer(12);
// FloatBuffer normals = BufferUtil.newFloatBuffer(12);
// FloatBuffer colors = FloatBuffer.wrap(new float[12]);
// FloatBuffer vertices = FloatBuffer.wrap(new float[12]);
// FloatBuffer normals = FloatBuffer.wrap(new float[12]);
// Fill them up
// colors.put(0, 1); colors.put( 1, 0); colors.put( 2, 0);
// colors.put(3, 1); colors.put( 4, 0); colors.put( 5, 0);
// colors.put(6, 1); colors.put( 7, 0); colors.put( 8, 0);
// colors.put(9, 1); colors.put(10, 0); colors.put(11, 0);
// vertices.put(0, -2); vertices.put( 1, 2); vertices.put( 2, 0);
// vertices.put(3, 2); vertices.put( 4, 2); vertices.put( 5, 0);
// vertices.put(6, -2); vertices.put( 7, -2); vertices.put( 8, 0);
// vertices.put(9, 2); vertices.put(10, -2); vertices.put(11, 0);
// normals.put(0, 0); normals.put( 1, 0); normals.put( 2, 1);
// normals.put(3, 0); normals.put( 4, 0); normals.put( 5, 1);
// normals.put(6, 0); normals.put( 7, 0); normals.put( 8, 1);
// normals.put(9, 0); normals.put(10, 0); normals.put(11, 1);
// FloatBuffer data = FloatBuffer.wrap(new float[24]);
FloatBuffer data = BufferUtil.newFloatBuffer(12 + 16);
// Vertices first
data.put(0, -2); data.put( 1, 2); data.put( 2, 0);
data.put(3, 2); data.put( 4, 2); data.put( 5, 0);
data.put(6, -2); data.put( 7, -2); data.put( 8, 0);
data.put(9, 2); data.put(10, -2); data.put(11, 0);
// Now colors
data.put(12, 1); data.put(13, 0); data.put(14, 0); data.put(15, 0);
data.put(16, 1); data.put(17, 0); data.put(18, 0); data.put(19, 0);
data.put(20, 1); data.put(21, 0); data.put(22, 0); data.put(23, 0);
data.put(24, 1); data.put(25, 0); data.put(26, 0); data.put(27, 0);
System.out.println("Set up buffers");
int[] vbo = new int[1];
gl.glGenBuffers(1, vbo, 0);
gl.glBindBuffer(GL.GL_ARRAY_BUFFER, vbo[0]);
gl.glBufferData(GL.GL_ARRAY_BUFFER, (12 + 16) * BufferUtil.SIZEOF_FLOAT, data, GL.GL_STATIC_DRAW);
gl.glVertexPointer(3, GL.GL_FLOAT, 0, 0);
// gl.glColorPointer(3, GL.GL_FLOAT, 0, 12 * BufferUtil.SIZEOF_FLOAT);
gl.glEnableClientState(GL.GL_VERTEX_ARRAY);
// gl.glEnableClientState(GL.GL_COLOR_ARRAY);
// System.out.println("Vertices' address: 0x" + Integer.toHexString(factory.getDirectBufferAddress(vertices)));
// System.out.println("Expected: 0x" + Integer.toHexString(vertices.arrayOffset));
// System.out.println("Colors' address: 0x" + Integer.toHexString(factory.getDirectBufferAddress(colors)));
// System.out.println("Expected: 0x" + Integer.toHexString(colors.arrayOffset));
// gl.glNormalPointer(GL.GL_FLOAT, 0, normals);
// gl.glEnableClientState(GL.GL_NORMAL_ARRAY);
// System.out.println("Normals' address: 0x" + Integer.toHexString(factory.getDirectBufferAddress(normals)));
// System.out.println("Expected: 0x" + Integer.toHexString(normals.arrayOffset));
// System.out.println("Set up vertex, color and normal pointers");
System.out.println("Set up vertex and color pointers");
// OpenGL Render Settings
gl.glClearColor(0, 0, 0, 1);
gl.glClearDepthf(1.0f);
gl.glEnable(GL.GL_DEPTH_TEST);
System.out.println("Set up clear color and clear depth");
//----------------------------------------------------------------------
// Code for GLEventListener.display()
//
long startTime = System.currentTimeMillis();
long curTime;
while ((System.currentTimeMillis() - startTime) < 10000) {
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
System.out.println("Cleared buffers");
// Set location in front of camera
gl.glLoadIdentity();
gl.glTranslatef(0, 0, -10);
System.out.println("Translated");
// Draw a square
gl.glDrawArrays(GL.GL_TRIANGLE_STRIP, 0, 4);
System.out.println("Drew arrays");
// FIXME -- need an external GLDrawable
factory.swapBuffers();
System.out.println("Swapped buffers");
// Process events
factory.processEvents();
// Sleep a bit
try {
Thread.sleep(100);
} catch (InterruptedException e) {
}
}
} catch (GLException e) {
e.printStackTrace();
}
System.exit(0);
}
}
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