Exemplo n.º 1
0
 static void drawTorus(float r, float R, int nsides, int rings) {
   float ringDelta = 2.0f * (float) Math.PI / rings;
   float sideDelta = 2.0f * (float) Math.PI / nsides;
   float theta = 0.0f, cosTheta = 1.0f, sinTheta = 0.0f;
   for (int i = rings - 1; i >= 0; i--) {
     float theta1 = theta + ringDelta;
     float cosTheta1 = (float) Math.cos(theta1);
     float sinTheta1 = (float) Math.sin(theta1);
     GL11.glBegin(GL11.GL_QUAD_STRIP);
     float phi = 0.0f;
     for (int j = nsides; j >= 0; j--) {
       phi += sideDelta;
       float cosPhi = (float) Math.cos(phi);
       float sinPhi = (float) Math.sin(phi);
       float dist = R + r * cosPhi;
       GL11.glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
       GL11.glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi);
       GL11.glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
       GL11.glVertex3f(cosTheta * dist, -sinTheta * dist, r * sinPhi);
     }
     GL11.glEnd();
     theta = theta1;
     cosTheta = cosTheta1;
     sinTheta = sinTheta1;
   }
 }
Exemplo n.º 2
0
  public static void main(String[] args) {
    final Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    Composite comp = new Composite(shell, SWT.NONE);
    comp.setLayout(new FillLayout());
    GLData data = new GLData();
    data.doubleBuffer = true;
    final GLCanvas canvas = new GLCanvas(comp, SWT.NONE, data);

    canvas.setCurrent();
    try {
      GLContext.useContext(canvas);
    } catch (LWJGLException e) {
      e.printStackTrace();
    }

    canvas.addListener(
        SWT.Resize,
        event -> {
          Rectangle bounds = canvas.getBounds();
          float fAspect = (float) bounds.width / (float) bounds.height;
          canvas.setCurrent();
          try {
            GLContext.useContext(canvas);
          } catch (LWJGLException e) {
            e.printStackTrace();
          }
          GL11.glViewport(0, 0, bounds.width, bounds.height);
          GL11.glMatrixMode(GL11.GL_PROJECTION);
          GL11.glLoadIdentity();
          GLU.gluPerspective(45.0f, fAspect, 0.5f, 400.0f);
          GL11.glMatrixMode(GL11.GL_MODELVIEW);
          GL11.glLoadIdentity();
        });

    GL11.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
    GL11.glColor3f(1.0f, 0.0f, 0.0f);
    GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST);
    GL11.glClearDepth(1.0);
    GL11.glLineWidth(2);
    GL11.glEnable(GL11.GL_DEPTH_TEST);

    shell.setText("SWT/LWJGL Example");
    shell.setSize(640, 480);
    shell.open();

    final Runnable run =
        new Runnable() {
          int rot = 0;

          @Override
          public void run() {
            if (!canvas.isDisposed()) {
              canvas.setCurrent();
              try {
                GLContext.useContext(canvas);
              } catch (LWJGLException e) {
                e.printStackTrace();
              }
              GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
              GL11.glClearColor(.3f, .5f, .8f, 1.0f);
              GL11.glLoadIdentity();
              GL11.glTranslatef(0.0f, 0.0f, -10.0f);
              float frot = rot;
              GL11.glRotatef(0.15f * rot, 2.0f * frot, 10.0f * frot, 1.0f);
              GL11.glRotatef(0.3f * rot, 3.0f * frot, 1.0f * frot, 1.0f);
              rot++;
              GL11.glPolygonMode(GL11.GL_FRONT_AND_BACK, GL11.GL_LINE);
              GL11.glColor3f(0.9f, 0.9f, 0.9f);
              drawTorus(1, 1.9f + ((float) Math.sin((0.004f * frot))), 15, 15);
              canvas.swapBuffers();
              display.asyncExec(this);
            }
          }
        };
    canvas.addListener(SWT.Paint, event -> run.run());
    display.asyncExec(run);

    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) display.sleep();
    }
    display.dispose();
  }