JOGL Exception while running program

OpenGL Development JOGL Development
#1

Dear All,

          I had written a following code but it gives me an exception.

if(m_Texturing && m_EnvMapOn && normals!=null){
CQ3DMatrix worldview = new CQ3DMatrix();
worldview.mul(m_ViewMatrix, m_WorldMatrix);
for (int i=0, face=0; i < nbIndex; i+=3, face++){
CQ3DVector normal = new CQ3DVector();

			normal.assign(normals[face]);
			normal.transformNoTrans(worldview);
			
			if (m_NormalizeNormals){
				normal.normalize();		//	Maybe a scale ???
			}
			
			float UV[] = new float[2];
			
			UV[0] = normal.m_Vector.x * 0.5f + 0.5f;
			UV[1] = normal.m_Vector.y * 0.5f + 0.5f;
			
			float norm []= new float[3];
			norm[0] = normals[face].x;
			norm[1] = normals[face].y;
			norm[2] = normals[face].z;
			
			m_gl.glBegin(GL.GL_TRIANGLES);
				m_gl.glNormal3fv(norm,0);
				m_gl.glTexCoord3fv(UV,0);
				norm[0] = vertices[faces[face+faceindex].a].pos.x;
				norm[1] = 0;
				norm[2] = 0;
				m_gl.glVertex3fv(norm,0);
				norm[0] = vertices[faces[face+faceindex].b].pos.x;
				m_gl.glVertex3fv(norm,0);
				norm[0] = vertices[faces[face+faceindex].c].pos.x;
				m_gl.glVertex3fv(norm,0);
			m_gl.glEnd();
			glError(m_gl.glGetError());
		}
		return QEDResponseCode.Q3D_RENDERER_OK;
	}
	
	SQ3DVERTEX [] Vertices = prepareVertices(vertices, nbVertices);
	
	m_gl.glEnableClientState(GL.GL_VERTEX_ARRAY);
	glError(m_gl.glGetError());
	
	FloatBuffer buffer = FloatBuffer.allocate(3);
	if(m_Texturing && !m_GenerateTexCoords){
		m_gl.glEnableClientState(GL.GL_TEXTURE_COORD_ARRAY);
		glError(m_gl.glGetError());
		buffer.put(0,Vertices[0].u);
		buffer.put(0,Vertices[1].v);
		buffer.position(0);
		m_gl.glTexCoordPointer(2,GL.GL_FLOAT,0,buffer);
		glError(m_gl.glGetError());
	}
	else{
		m_gl.glDisableClientState(GL.GL_TEXTURE_COORD_ARRAY);
		glError(m_gl.glGetError());
	}

	buffer.put(0,Vertices[0].pos.x);
	buffer.put(1,Vertices[0].pos.y);
	buffer.put(2,Vertices[0].pos.z);
	buffer.position(0);
	[b]m_gl.glVertexPointer(3,GL.GL_FLOAT,0,buffer);[/b]
	glError(m_gl.glGetError());

	if(normals==null){
		m_gl.glEnableClientState(GL.GL_NORMAL_ARRAY);
		glError(m_gl.glGetError());
		buffer.put(0,Vertices[0].normal.x);
		m_gl.glNormalPointer(GL.GL_FLOAT,0,buffer);
		glError(m_gl.glGetError());

		ShortBuffer shBuf = ShortBuffer.allocate(faces.length*3);
		for(int Icount=faceindex;Icount<faces.length;Icount++){
			shBuf.put((short)faces[Icount].a);
			shBuf.put((short)faces[Icount].b);
			shBuf.put((short)faces[Icount].c);
		}
		
		shBuf.position(0);
		m_gl.glDrawElements(GL.GL_TRIANGLES,(int) nbIndex,GL.GL_UNSIGNED_SHORT,shBuf);
		glError(m_gl.glGetError());

		m_gl.glDisableClientState(GL.GL_NORMAL_ARRAY);
		glError(m_gl.glGetError());
	}
	else{
		m_gl.glDisableClientState(GL.GL_NORMAL_ARRAY);
		glError(m_gl.glGetError());
		m_gl.glBegin(GL.GL_TRIANGLES);
				int i;
				int face;
				for(i=0, face=0 ; i<nbIndex; i+=3){
					buffer.put(0,normals[face].x);
					buffer.put(1,normals[face].y);
					buffer.put(2,normals[face].z);
					m_gl.glNormal3fv(buffer);
					m_gl.glArrayElement(faces[face+faceindex].a);
					m_gl.glArrayElement(faces[face+faceindex].b);
					m_gl.glArrayElement(faces[face+faceindex].c);
					face++;
				}
			m_gl.glEnd();
			glError(m_gl.glGetError());
			
		m_gl.glEnableClientState(GL.GL_NORMAL_ARRAY);
		glError(m_gl.glGetError());
	}
	
	m_gl.glDisableClientState(GL.GL_VERTEX_ARRAY);
	glError(m_gl.glGetError());

	if(m_Texturing && !m_GenerateTexCoords){
		m_gl.glDisableClientState(GL.GL_TEXTURE_COORD_ARRAY);
		glError(m_gl.glGetError());
	}

                 And the exception i am getting is

Caused by: javax.media.opengl.GLException: Argument “ptr” was not a direct buffer
at com.sun.opengl.impl.GLImpl.glVertexPointer(GLImpl.java:27940)
at javax.media.opengl.DebugGL.glVertexPointer(DebugGL.java:11682)
at com.qedsoft.renderer.abstractfile.renderer.impl.CQ3DRendererOpenGL.drawFacesByIndexFlat(CQ3DRendererOpenGL.java:1083)
at com.qedsoft.renderer.abstractfile.renderer.impl.CQ3DRendererOpenGL.drawFacesByIndex(CQ3DRendererOpenGL.java:1015)

                 Line number 1083 is what i have saw bold in given code.

                 Please let me know what the problem is ?.......

Thanks To All in Advance.

#2

Caused by: javax.media.opengl.GLException: Argument “ptr” was not a direct buffer

Try changing the buffer type that gets passed into that method, into a direct buffer and see if it makes a difference.
ie: change the line that says:
FloatBuffer buffer = FloatBuffer.allocate(3);
into:
FloatBuffer buffer = FloatBuffer.allocateDirect(3);

#3

Dear Ultraq,

Thanks for reply.

But there is no method allocateDirect in FloatBuffer class. That method exits only in ByteBuffer class.
I am using float data rather than byte.

Thanks in Advance.

#4

Hi,

use the newFloat/Int/…Buffer(elementCount) methods of the BufferUtil. The Util creates correct ordered (native order) direct Buffers.

And don’t forget to rewind() your buffer before uploading it to OpenGL.

right, but you could create a FloatBuffers from ByteBuffers (see the source of BufferUtil if you are interested)

#5

Thanks a lot.

I have created direct buffer by using BufferUtil class of JOGL. It has various static methods to create long, float, short direct buffers.

#6

Ah true. My bad. You can make a direct FloatBuffer using ByteBuffer.allocateDirect(), followed by ByteBuffer.asFloatBuffer(). Although I suspect JOGL’s BufferUtil class will do that for you anyway.

#7

It’s also critical to set the byte order of the ByteBuffer to the native order before viewing it as a FloatBuffer, which the BufferUtil class does and which is why it’s strongly recommended to use it instead of calling ByteBuffer.allocateDirect() yourself.