Java GL2.glClear方法代碼示例

import javax.media.opengl.GL2; //導入方法依賴的package包/類
public void display(GLDrawable gLDrawable)
{
  String [] fonts = { "BitMap 9 by 15", "BitMap 8 by 13",
        "Times Roman 10 Point ", "Times Roman 24 Point ",
        "Helvetica 10 Point ","Helvetica 12 Point ","Helvetica 18 Point "};
       
  final GL2 gl = SumoPlatform.getApplication().getGeoContext().getGL().getGL2();
  final GLUT glut = new GLUT();
	 
  gl.glClear (GL.GL_COLOR_BUFFER_BIT);  // Set display window to color.
  gl.glColor3f (0.0f, 0.0f, 0.0f);  // Set text e.color to black
  gl.glMatrixMode (GL2.GL_MODELVIEW);
  gl.glLoadIdentity();
 
  int x = 20, y=15;
  for (int i=0; i<7;i++){
        gl.glRasterPos2i(x,y); // set position
        glut.glutBitmapString(i+2, fonts[i]);
         y+= 20;
  }

}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
/**
 * Invokes all layers to draw.
 */
public void draw(GL2 gl) {
	super.draw(gl);
	
	if (state != null && gl != null && drawableLayer != null) {

		GaiaCanvas canvas = GaiaCanvas.getInstance();

		// Clear the color-buffer to white:
		gl.glClearColor(0xFF, 0xFF, 0xFF, 0);
		gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);

		// Set camera.
		float currentZoom = state.getZoom();

		setupCamera(gl, new GLU(), state.getPosition().getX(), state
				.getPosition().getY(), currentZoom, canvas.getWidth(),
				canvas.getHeight());

		// Draw all layers beginning with the lowest:
		drawableLayer.draw(gl, 0);
	}
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
private void drawNurbSurface(GLAutoDrawable drawable) {
	GL2 gl = drawable.getGL().getGL2();
	gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);

	GLUgl2 glug12 = new GLUgl2();
	GLUnurbs nurbsRenderer = glug12.gluNewNurbsRenderer();
	//glug12.gluNurbsProperty(nurbsRenderer, , arg2)
	glug12.gluBeginSurface(nurbsRenderer);
	int uknot_cnt=8;
	float[] uknot = new float[] {0.f, 0.f, 0.f, 0.f, 1.f, 1.f, 1.f, 1.f};
	int vknot_cnt = 8;
	float[] vknot = uknot;
	int ustride=4*3;
	int vstride=3;
	int uorder=4;
	int vorder=4;
	int evl_type=GL2.GL_MAP2_NORMAL;
	//glug12.gluNurbsSurface(nurbsRenderer, uknot_cnt, uknot, vknot_cnt, vknot, ustride, vstride, ctlarray, uorder, vorder, evl_type);
	evl_type=GL2.GL_MAP2_VERTEX_3;
	glug12.gluNurbsSurface(nurbsRenderer, uknot_cnt, uknot, vknot_cnt, vknot, ustride, vstride, ctlarray, uorder, vorder, evl_type);
	glug12.gluEndSurface(nurbsRenderer);
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
@Override
public void paint(){
	// Compute maximum width of text we're going to draw
	TextRenderer textRenderer = new TextRenderer(new Font(Font.SERIF,0 , 18));
	
    int maxTextWidth = (int) textRenderer.getBounds(this.text).getWidth();
    maxTextWidth = Math.min(maxTextWidth+10,size.width);
	
	GL2 gl=glContext.getGL2();
	gl.glClear(GL.GL_COLOR_BUFFER_BIT);
	gl.glPolygonMode (GL2.GL_FRONT, GL2.GL_LINE_STRIP);
    gl.glColor3f(0.5f, 0.5f, 0.5f);

    gl.glBegin(GL2.GL_LINE_STRIP);
    gl.glVertex2i( this.posx,this.posy);							//x1,y1
    gl.glVertex2i( this.posx+maxTextWidth,this.posy );				//x2,y1
    gl.glVertex2i( this.posx+maxTextWidth,this.posy +size.height); 	//x2,y2 
    gl.glVertex2i( this.posx,this.posy+size.height);				//x1,y2
    gl.glVertex2i( this.posx,this.posy);	
    gl.glEnd( );
    
    
    GLDrawable draw=gl.getGL().getContext().getGLDrawable();
	textRenderer.beginRendering(draw.getWidth(),draw.getHeight());
	textRenderer.setColor(Color.WHITE);
	textRenderer.setSmoothing(true);
	textRenderer.draw(this.text,(int)posx,(int)posy+5); //text and position
	textRenderer.flush();
	textRenderer.endRendering();
	
	gl.glFlush();
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
public void display(GLAutoDrawable drawable) {
	GL2 gl = drawable.getGL().getGL2();
	this.drawable = drawable;

	// Apply transformations
	double transx = -origin.getX(), transy = -origin.getY();

	gl.glMatrixMode(GL2.GL_PROJECTION);
	gl.glLoadIdentity();
	gl.glOrtho(0, width, height, 0, -1, 1);
	gl.glViewport(0, 0, width, height);

	gl.glTranslated(transx + zoomPos.getX(), transy + zoomPos.getY(), 0);
	gl.glScaled(scaleFactor, scaleFactor, 1);
	gl.glTranslated(-zoomPos.getX(), -zoomPos.getY(), 0);

	gl.glGetDoublev(GL2.GL_MODELVIEW_MATRIX, modelview);
	gl.glGetDoublev(GL2.GL_PROJECTION_MATRIX, projection);
	gl.glGetIntegerv(GL2.GL_VIEWPORT, viewport);
	gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);

	// Draw edges, arrows and vertices
	edgeRenderer.transform(transx, transy, scaleFactor);
	edgeRenderer.render();

	if (animateLabels) {
		labelRenderer.scale(scaleFactor);
		labelRenderer.drawLabels();
	}

	vertexRenderer.transform(transx, transy, scaleFactor);
	vertexRenderer.render();
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
@Override
public void display(GLAutoDrawable drawable) {
  GL2 gl = drawable.getGL().getGL2();
  gl.glClear(GL.GL_COLOR_BUFFER_BIT /* | GL.GL_DEPTH_BUFFER_BIT */);

  if(shared.layout != null) {
    int res = prenderer.prepare(gl);
    if(res == 1) {
      // Request a repaint, to generate the next texture.
      canvas.repaint();
    }
    if(res == 2) {
      messageOverlay.setMessage("Texture rendering completed.");
      switchState(State.EXPLORE);
    }
  }

  shared.camera.apply(gl);
  if(shared.layout != null) {
    prenderer.drawParallelPlot(drawable, gl);
  }

  if(DEBUG) {
    arcball.debugRender(gl);
  }

  if(State.MENU.equals(state)) {
    menuOverlay.render(gl);
  }
  if(State.PREPARATION.equals(state)) {
    messageOverlay.render(gl);
  }
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
private void setupLighting(GLAutoDrawable drawable, GL2 gl) {
	int paramsOffset = 0;
	float pos[] = { 2.0f, -2.0f, 10.0f, 0.0f };
	float ambient[] = {0.5f, 0.5f, 0.5f, 1.0f};
	float diffuse[] = {0.9f, 0.9f, 0.9f, 1.0f};
	float specular[] = {0.05f, 0.05f, 0.99f, 1.0f};

	gl.glLightfv(GL2.GL_LIGHT0, GL2.GL_POSITION, pos, 0);
	gl.glEnable(GL2.GL_LIGHTING);
	gl.glEnable(GL2.GL_LIGHT0);
	gl.glEnable(GL2.GL_DEPTH_TEST);
	gl.glEnable(GL2.GL_AUTO_NORMAL);
	gl.glEnable(GL2.GL_NORMALIZE);

	gl.glLightfv(GL2.GL_LIGHT0, GL2.GL_AMBIENT, ambient, paramsOffset);
	gl.glLightfv(GL2.GL_LIGHT0, GL2.GL_DIFFUSE, diffuse, paramsOffset);
	gl.glLightfv(GL2.GL_LIGHT0, GL2.GL_SPECULAR, specular, paramsOffset);
	gl.glLightfv(GL2.GL_LIGHT0, GL2.GL_POSITION, pos, paramsOffset);
	gl.glLightModeli(GL2.GL_LIGHT_MODEL_LOCAL_VIEWER, GL2.GL_TRUE);

	gl.glClearColor(1f, 1f, 1f, 1f);
	gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
	gl.glMatrixMode(GL2.GL_MODELVIEW);
	gl.glLoadIdentity();
	gl.glViewport(0, 0, drawable.getSurfaceWidth(), drawable.getSurfaceHeight());
	gl.glMatrixMode(GL2.GL_PROJECTION);
	gl.glLoadIdentity();
	if (gl instanceof GLLightingFunc) {
		((GLLightingFunc) gl).glMaterialfv(GL.GL_FRONT, GLLightingFunc.GL_AMBIENT_AND_DIFFUSE, blue, 0);
		((GLLightingFunc) gl).glMaterialfv(GL.GL_FRONT, GLLightingFunc.GL_SPECULAR, white, 0);
		float[] medHiShiny = new float[] {80.0f};
		((GLLightingFunc) gl).glMaterialfv(GL.GL_FRONT, GLLightingFunc.GL_SHININESS, medHiShiny, 0);
		((GLLightingFunc) gl).glShadeModel(GLLightingFunc.GL_FLAT);
	}
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
private void drawSurface(GLAutoDrawable drawable) {
	GL2 gl = drawable.getGL().getGL2();
	gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
	gl.glPushMatrix();
	gl.glEvalMesh2(GL2.GL_FILL, 0, 20, 0, 20);
	gl.glPopMatrix();
	gl.glFlush();
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
void render( GL2 gl2 )
{
    gl2.glClear( GL.GL_COLOR_BUFFER_BIT );

    // draw a triangle filling the window
    gl2.glLoadIdentity();
    gl2.glBegin( GL.GL_TRIANGLES );
    gl2.glColor3f( 1, 0, 0 );
    gl2.glVertex3f( 0, 0, 0 );
    gl2.glColor3f( 0, 1, 0 );
    gl2.glVertex3f( 5, 0, 2 );
    gl2.glColor3f( 0, 0, 1 );
    gl2.glVertex3f( 2, 5, 3 );
    gl2.glEnd();
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
/**
 * {@inheritDoc}
 *
 * @see javax.media.opengl.GLEventListener#display(javax.media.opengl.GLAutoDrawable)
 */
@Override
public void display( final GLAutoDrawable drawable )
{
	this.updateVis();

	final GL2 gl = drawable.getGL().getGL2();
	gl.glMatrixMode( GLMatrixFunc.GL_MODELVIEW );
	gl.glLoadIdentity();

	if( this.cameraPosition != null )
	{
		final float[] pos = this.cameraPosition.getCameraPosition();
		this.glu.gluLookAt( pos[0], pos[1], pos[2], pos[3], pos[4], pos[5], pos[6], pos[7], pos[8] );
	}

       // Prepare light parameters.
	if( this.enableLights )
	{
        final float SHINE_ALL_DIRECTIONS = 1;
        final float[] lightPos = {-30, 0, 0, SHINE_ALL_DIRECTIONS};
        final float[] lightColorAmbient = {0.2f, 0.2f, 0.2f, 1f};
        final float[] lightColorSpecular = {0.5f, 0.5f, 0.5f, 1f};

        // Set light parameters.
        gl.glLightfv( GLLightingFunc.GL_LIGHT1, GLLightingFunc.GL_POSITION, lightPos, 0 );
        gl.glLightfv( GLLightingFunc.GL_LIGHT1, GLLightingFunc.GL_AMBIENT, lightColorAmbient, 0 );
        gl.glLightfv( GLLightingFunc.GL_LIGHT1, GLLightingFunc.GL_SPECULAR, lightColorSpecular, 0 );

        // Enable lighting in GL.
        gl.glEnable( GLLightingFunc.GL_LIGHT1 );
        gl.glEnable( GLLightingFunc.GL_LIGHTING );
	}

	gl.glClear( GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT );

	this.renderVis( drawable );
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
public void drawScene(GL2 gl)
{
  gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);

  // Colors
  float red[] =   {1.0f,0.0f,0.0f,1.0f};
  float green[] = {0.0f,1.0f,0.0f,1.0f};
  float blue[] =  {0.0f,0.0f,1.0f,1.0f};
	
  // Red rectangle
  GLRectangleEntity r1 = new GLRectangleEntity(gl, glu);
  r1.x = 0.15f;
  r1.y = 0.25f;
  r1.z = 0.75f;
  r1.w = 0.4f;
  r1.h = 0.4f;
  r1.c = red;
  r1.id = 10;
  r1.draw();

  // Green rectangle
  GLRectangleEntity r2 = new GLRectangleEntity(gl, glu);
  r2.x = 0.35f;
  r2.y = 0.45f;
  r2.z = 0.5f;
  r2.w = 0.4f;
  r2.h = 0.4f;
  r2.c = green;
  r2.id = 20;
  r2.draw();

  // Blue rectangle
  GLRectangleEntity r3 = new GLRectangleEntity(gl, glu);
  r3.x = 0.45f;
  r3.y = 0.15f;
  r3.z = 0.25f;
  r3.w = 0.4f;
  r3.h = 0.4f;
  r3.c = blue;
  r3.id = 30;
  r3.draw();

  gl.glFlush();
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
@SuppressWarnings("static-access")
protected void render(GL2 gl2) {
    if (use_draw_pixels_ || view_width_ == 0 || view_height_ == 0) {
        return;
    }

    assert (initialized_context_ != null);

    final float[] vertex_data = {
            //tu,   tv,     x,     y,    z
            0.0f, 1.0f, -1.0f, -1.0f, 0.0f, 1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f };
    FloatBuffer vertices = FloatBuffer.wrap(vertex_data);

    gl2.glClear(gl2.GL_COLOR_BUFFER_BIT | gl2.GL_DEPTH_BUFFER_BIT);

    gl2.glMatrixMode(gl2.GL_MODELVIEW);
    gl2.glLoadIdentity();

    // Match GL units to screen coordinates.
    gl2.glViewport(0, 0, view_width_, view_height_);
    gl2.glMatrixMode(gl2.GL_PROJECTION);
    gl2.glLoadIdentity();

    // Draw the background gradient.
    gl2.glPushAttrib(gl2.GL_ALL_ATTRIB_BITS);
    gl2.glBegin(gl2.GL_QUADS);
    gl2.glColor4f(1.0f, 0.0f, 0.0f, 1.0f);  // red
    gl2.glVertex2f(-1.0f, -1.0f);
    gl2.glVertex2f(1.0f, -1.0f);
    gl2.glColor4f(0.0f, 0.0f, 1.0f, 1.0f);  // blue
    gl2.glVertex2f(1.0f, 1.0f);
    gl2.glVertex2f(-1.0f, 1.0f);
    gl2.glEnd();
    gl2.glPopAttrib();

    // Rotate the view based on the mouse spin.
    if (spin_x_ != 0) {
        gl2.glRotatef(-spin_x_, 1.0f, 0.0f, 0.0f);
    }
    if (spin_y_ != 0) {
        gl2.glRotatef(-spin_y_, 0.0f, 1.0f, 0.0f);
    }

    if (transparent_) {
        // Alpha blending style. Texture values have premultiplied alpha.
        gl2.glBlendFunc(gl2.GL_ONE, gl2.GL_ONE_MINUS_SRC_ALPHA);

        // Enable alpha blending.
        gl2.glEnable(gl2.GL_BLEND);
    }

    // Enable 2D textures.
    gl2.glEnable(gl2.GL_TEXTURE_2D);

    // Draw the facets with the texture.
    assert (texture_id_[0] != 0);
    gl2.glBindTexture(gl2.GL_TEXTURE_2D, texture_id_[0]);
    gl2.glInterleavedArrays(gl2.GL_T2F_V3F, 0, vertices);
    gl2.glDrawArrays(gl2.GL_QUADS, 0, 4);

    // Disable 2D textures.
    gl2.glDisable(gl2.GL_TEXTURE_2D);

    if (transparent_) {
        // Disable alpha blending.
        gl2.glDisable(gl2.GL_BLEND);
    }
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
@SuppressWarnings("static-access")
protected void render(GL2 gl2) {
  if (use_draw_pixels_ || view_width_ == 0 || view_height_ == 0)
    return;

  assert(initialized_context_ != null);

  final float[] vertex_data = {
      //tu,   tv,     x,     y,    z
      0.0f, 1.0f, -1.0f, -1.0f, 0.0f,
      1.0f, 1.0f,  1.0f, -1.0f, 0.0f,
      1.0f, 0.0f,  1.0f,  1.0f, 0.0f,
      0.0f, 0.0f, -1.0f,  1.0f, 0.0f
  };
  FloatBuffer vertices = FloatBuffer.wrap(vertex_data);

  gl2.glClear(gl2.GL_COLOR_BUFFER_BIT | gl2.GL_DEPTH_BUFFER_BIT);

  gl2.glMatrixMode(gl2.GL_MODELVIEW);
  gl2.glLoadIdentity();

  // Match GL units to screen coordinates.
  gl2.glViewport(0, 0, view_width_, view_height_);
  gl2.glMatrixMode(gl2.GL_PROJECTION);
  gl2.glLoadIdentity();
  gl2.glOrtho(0, 0, view_width_, view_height_, 0.1, 100.0);

  // Draw the background gradient.
  gl2.glPushAttrib(gl2.GL_ALL_ATTRIB_BITS);
  gl2.glBegin(gl2.GL_QUADS);
  gl2.glColor4f(1.0f, 0.0f, 0.0f, 1.0f);  // red
  gl2.glVertex2f(-1.0f, -1.0f);
  gl2.glVertex2f(1.0f, -1.0f);
  gl2.glColor4f(0.0f, 0.0f, 1.0f, 1.0f);  // blue
  gl2.glVertex2f(1.0f, 1.0f);
  gl2.glVertex2f(-1.0f, 1.0f);
  gl2.glEnd();
  gl2.glPopAttrib();

  // Rotate the view based on the mouse spin.
  if (spin_x_ != 0)
    gl2.glRotatef(-spin_x_, 1.0f, 0.0f, 0.0f);
  if (spin_y_ != 0)
    gl2.glRotatef(-spin_y_, 0.0f, 1.0f, 0.0f);

  if (transparent_) {
    // Alpha blending style. Texture values have premultiplied alpha.
    gl2.glBlendFunc(gl2.GL_ONE, gl2.GL_ONE_MINUS_SRC_ALPHA);

    // Enable alpha blending.
    gl2.glEnable(gl2.GL_BLEND);
  }

  // Enable 2D textures.
  gl2.glEnable(gl2.GL_TEXTURE_2D);

  // Draw the facets with the texture.
  assert(texture_id_[0] != 0);
  gl2.glBindTexture(gl2.GL_TEXTURE_2D, texture_id_[0]);
  gl2.glInterleavedArrays(gl2.GL_T2F_V3F, 0, vertices);
  gl2.glDrawArrays(gl2.GL_QUADS, 0, 4);

  // Disable 2D textures.
  gl2.glDisable(gl2.GL_TEXTURE_2D);

  if (transparent_) {
    // Disable alpha blending.
    gl2.glDisable(gl2.GL_BLEND);
  }
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
@Override
public void draw(GL2 gl) {
	
	boolean lastFrame2D = wasLastFrame2D();
	super.draw(gl);
	
	// Clear the color-buffer to white:
	gl.glClearColor(0x0, 0x0, 0x0, 0);
	gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);

	this.setCamera(gl, this.glu, this.width, this.height);
	// this.setLights(gl);

	gl.glLoadIdentity();

	if(state.is2DMode() != lastFrame2D) {
		oldRotation = new FloatVector3D(0, 0, 0);
		System.arraycopy(IDENTITY, 0, modelViewMatrix, 0, IDENTITY.length);
		gl.glRotatef(-90, 1, 0, 0);
		gl.glMultMatrixf(modelViewMatrix, 0);
		gl.glGetFloatv(GL2.GL_MODELVIEW_MATRIX, modelViewMatrix, 0);
		gl.glLoadIdentity();
	}

	
	FloatVector3D relativeRotation = new FloatVector3D(oldRotation);
	relativeRotation.sub(state.getRotation());
	
	
	// rotate the globe
	gl.glRotatef(relativeRotation.getX(), 1, 0, 0);
	gl.glRotatef(relativeRotation.getY(), 0, 1, 0);
	// compute 'old' rotation
	gl.glMultMatrixf(modelViewMatrix, 0);

	// reset the rotations
	oldRotation = new FloatVector3D(state.getRotation());

	// store the current rotation in the GL-state
	gl.glGetFloatv(GL2.GL_MODELVIEW_MATRIX, modelViewMatrix, 0);

	this.drawEarth(gl);
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
@Override protected void doRoi() {
        transformer.transform(srcRoiPts, dstRoiPts, parameters, false);
        double[] pts = dstRoiPts.get();
        for (int i = 0; i < pts.length; i++) {
            pts[i] /= (1<<pyramidLevel);
        }
        roi.x(0).y(0).width(maskCL[pyramidLevel].width).height(maskCL[pyramidLevel].height);
        // Add +3 all around because cvWarpPerspective() needs it for interpolation,
        // and there seems to be something funny with memory alignment and
        // ROIs, so let's align our ROI to a 16 byte boundary just in case..
        JavaCV.boundingRect(pts, roi, 3, 3, 16, 1);
//System.out.println(roi);
        inputData.roiX = roi.x();
        inputData.roiY = roi.y();
        inputData.roiWidth  = roi.width();
        inputData.roiHeight = roi.height();

//        GLContext glContext = context.getGLContext();
//        glContext.makeCurrent();
        GL2 gl = context.getGL2();
        gl.glBindFramebuffer(GL2.GL_FRAMEBUFFER, maskfb[pyramidLevel]);

        gl.glMatrixMode(GL2.GL_PROJECTION);
        gl.glLoadIdentity();
        context.getGLU().gluOrtho2D(0.0f, maskCL[pyramidLevel].width, 0.0f, maskCL[pyramidLevel].height);

        gl.glMatrixMode(GL2.GL_MODELVIEW);
        gl.glLoadIdentity();
        gl.glViewport(0, 0, maskCL[pyramidLevel].width, maskCL[pyramidLevel].height);

        gl.glClearColor(0, 0, 0, 0);
        gl.glClear(GL2.GL_COLOR_BUFFER_BIT);
        gl.glColor4f(1, 1, 1, 1);
        gl.glBegin(GL2.GL_POLYGON);
// XXX: Remove "extra" pixels here...
            gl.glVertex2d(pts[0],   pts[1]);
            gl.glVertex2d(pts[2]+1, pts[3]);
            gl.glVertex2d(pts[4]+1, pts[5]+1);
            gl.glVertex2d(pts[6],   pts[7]+1);
        gl.glEnd();
//        gl.glFinish();
//        glContext.release();
    }