Culling error? Deferred Shading (Geometry Stage)

Hi there!

I’m developing a Deferred Shading and when I show my 4 buffers appear to be a problem with culling.

drawMaterial only:

And my FBOs:

drawMaterial code (image 1)

	//*///-----------------------------------------------------------------------------------------
	void DeferredShader::drawMaterial( )
	{
		glViewport( 0, 0, m_width, m_height);
		
		GLenum buffers[] = { GL_COLOR_ATTACHMENT0_EXT, GL_COLOR_ATTACHMENT1_EXT, GL_COLOR_ATTACHMENT2_EXT, GL_COLOR_ATTACHMENT3_EXT/*, GL_DEPTH_ATTACHMENT_EXT*/ };
		glDrawBuffers( 4, buffers );
		checkFBO( );

		glClearColor( 0.0, 0.0, 0.0, 0.0);
		glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
		
		glEnable(GL_DEPTH);
		glEnable(GL_DEPTH_TEST);
		glDepthFunc(GL_LESS);
		glDepthRange(0.0, 1.0);		// The default z mapping
		glStencilMask(GL_FALSE);

		glDisable(GL_TEXTURE_GEN_S);
		glDisable(GL_TEXTURE_GEN_T);
		glDisable(GL_TEXTURE_GEN_R);
		glDisable(GL_TEXTURE_GEN_Q);

		glCullFace(GL_BACK);

		//glShadeModel(GL_SMOOTH);
		//glEnable(GL_LIGHTING);
		glEnable(GL_COLOR_MATERIAL);
		glEnable(GL_NORMALIZE);
		glEnable(GL_TEXTURE_2D);

		glEnable(GL_ALPHA_TEST);
		glDepthMask(GL_TRUE);
		glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);

		glPushMatrix( );
			// draw raw scene geometry
			m_pMRTShader->setUp( m_pMRTShader->getConfiguration( ) );
				m_pMRTShader->beginTextures( );

				m_pMRTShader->begin( );

				// Formato para el shader
				static Entity3D xForm;
				const Matrix4 mEffectFormat = xForm.getWorldMatrix( ).transpose( );

				glMultiTexCoord4fv(GL_TEXTURE1, mEffectFormat[0]);
				glMultiTexCoord4fv(GL_TEXTURE2, mEffectFormat[1]);
				glMultiTexCoord4fv(GL_TEXTURE3, mEffectFormat[2]);
				glutSolidTeapot( 2000.0f );
				
				m_pMRTShader->endTextures( );
			m_pMRTShader->end( );
		glPopMatrix( );
	}

show FBOs source code (image 2):

       //*///-----------------------------------------------------------------------------------------
	void DeferredShader::showTest( )
	{
		glViewport(0, 0, m_width, m_height);
		glMatrixMode(GL_PROJECTION);
		glLoadIdentity();

		glOrtho(0.0, 1.0, 1.0, 0.0, -1.0, 1.0);
		glMatrixMode(GL_MODELVIEW);
		glLoadIdentity();

		m_pFBOTestShader->begin( );
		m_pFBOTestShader->setUniform1i("FBO", 0);
		glActiveTexture(GL_TEXTURE0);

		glBindTexture(GL_TEXTURE_2D, m_mrtTexture[0]);
		glBegin(GL_QUADS);
			glTexCoord2i(0, 1); glVertex2f(0.0f, 0.0f);
			glTexCoord2i(1, 1); glVertex2f(0.5f, 0.0f);
			glTexCoord2i(1, 0); glVertex2f(0.5f, 0.5f);
			glTexCoord2i(0, 0); glVertex2f(0.0f, 0.5f);
		glEnd( );
		
		glBindTexture(GL_TEXTURE_2D, m_mrtTexture[1]);
		glBegin(GL_QUADS);
			glTexCoord2i(0, 1); glVertex2f(0.5f, 0.0f);
			glTexCoord2i(1, 1); glVertex2f(1.0f, 0.0f);
			glTexCoord2i(1, 0); glVertex2f(1.0f, 0.5f);
			glTexCoord2i(0, 0); glVertex2f(0.5f, 0.5f);
		glEnd( );

		glBindTexture(GL_TEXTURE_2D, m_mrtTexture[2]);
		glBegin(GL_QUADS);
			glTexCoord2i(0, 1); glVertex2f(0.0f, 0.5f);
			glTexCoord2i(1, 1); glVertex2f(0.5f, 0.5f);
			glTexCoord2i(1, 0); glVertex2f(0.5f, 1.0f);
			glTexCoord2i(0, 0); glVertex2f(0.0f, 1.0f);
		glEnd( );

		glBindTexture(GL_TEXTURE_2D, m_mrtTexture[3]);
		glBegin(GL_QUADS);
			glTexCoord2i(0, 1); glVertex2f(0.5f, 0.5f);
			glTexCoord2i(1, 1); glVertex2f(1.0f, 0.5f);
			glTexCoord2i(1, 0); glVertex2f(1.0f, 1.0f);
			glTexCoord2i(0, 0); glVertex2f(0.5f, 1.0f);
		glEnd( );

		m_pFBOTestShader->end( );
	}

I test some combinations like, disable culling, change render CW, CCW and nothing appear to run ok.

Thanks in advance.

/, GL_DEPTH_ATTACHMENT_EXT/

You explicitely commented the depth buffer here, are your sure you wanted that ?

Ok, this solve the problem. But then I have other

		// create depth texture
		glGenTextures( 1, &m_mrtTexture[3] );
		glBindTexture( GL_TEXTURE_2D, m_mrtTexture[3] );
		glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
		glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); 
		glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
		glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
		glTexImage2D( GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT24, m_width, m_height, 0, GL_DEPTH_COMPONENT, GL_FLOAT, 0 );
		glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, m_mrtTexture[3], 0 );
		checkFBO( );
		

		// initialize depth renderbuffer
		glGenRenderbuffersEXT( 1, &m_depthFBO );
		glBindRenderbufferEXT( GL_RENDERBUFFER_EXT, m_depthFBO );
		glRenderbufferStorageEXT( GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, m_width, m_height );
		glFramebufferRenderbufferEXT( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, m_depthFBO );
		checkFBO( );

with: GLenum buffers[] = { GL_COLOR_ATTACHMENT0_EXT, GL_COLOR_ATTACHMENT1_EXT, GL_COLOR_ATTACHMENT2_EXT, GL_DEPTH_ATTACHMENT_EXT/GL_COLOR_ATTACHMENT3_EXT/ };

I’m doing something wrong?
With GL_COLOR_ATTACHMENT3_EXT:

		glGenTextures( 1, &m_mrtTexture[3] );
		glBindTexture( GL_TEXTURE_2D, m_mrtTexture[3] );
		glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
		glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
		glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
		glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
		glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA16F, m_width, m_height, 0, GL_RGBA, GL_FLOAT, NULL );
		glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT3_EXT  , GL_TEXTURE_2D, m_mrtTexture[3], 0 );
		checkFBO( );

PS: with DEPTH ATTACH I commented the code in my GLSL for gl_FragData[3] to don’t override source.

Thanks!

Now is solved

With glDrawBuffers is not possible to do GL_DEPTH_ATTACHMENT_EXT, I have problem with that.

Finally:

		glGenTextures( 1, &m_mrtTexture[3] );
		glBindTexture( GL_TEXTURE_2D, m_mrtTexture[3] );
		glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
		glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
		glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
		glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
		glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA16F, m_width, m_height, 0, GL_RGBA, GL_FLOAT, NULL );
		glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT3_EXT  , GL_TEXTURE_2D, m_mrtTexture[3], 0 );
		checkFBO( );
		//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
		//glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);

		// create a render buffer as our depthbuffer and attach it
		glGenRenderbuffersEXT( 1, &m_depthFBO );
		glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, m_depthFBO);
		glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, m_width, m_height);
		glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, m_depthFBO);

And:

GLenum buffers[] = { GL_COLOR_ATTACHMENT0_EXT, GL_COLOR_ATTACHMENT1_EXT, GL_COLOR_ATTACHMENT2_EXT, GL_COLOR_ATTACHMENT3_EXT };
		glDrawBuffers( 4, buffers );

In my shader I have this code for to see depth values:

float d =((zNear * vpos.z + zFar) / -vpos.z); // detph
gl_FragData[3] = float_to_color(d);

Thanks for all ^^