Is my ortho projection correct

Dear Friends
I am using orthographic projection to render my 3d model. As I rotate the geometry the model gets distorted near the edeges at the top. Can u tell me anyone why is it happening. please check my code snippet.

Code:

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void CRevolutionProjView::orthogonalStart()
{
        glMatrixMode(GL_PROJECTION);
    glPushMatrix();
    glLoadIdentity();
    glOrtho(left_side*AR, right_side*AR, top_side, bottom_side, near_side, far_side);
        glScalef(zoomFactor,zoomFactor,1);
        glTranslatef(trans[0], trans[1], trans[2]);
        glRotatef(rot[0], 1.0f, 0.0f, 0.0f);
        glRotatef(rot[1], 0.0f, 1.0f, 0.0f);
        glRotatef(rot[2], 0.0f, 0.0f, 1.0f);
    glMatrixMode(GL_MODELVIEW);
}

void CRevolutionProjView::orthogonalEnd()
{
    glMatrixMode(GL_PROJECTION);
    glPopMatrix();
    glMatrixMode(GL_MODELVIEW);
}

void CRevolutionProjView::DrawScene(CDC *pDC)
{
        wglMakeCurrent(pDC->m_hDC, m_hrc);
        //---------------------------------
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        glEnable(GL_DEPTH_TEST);
        orthogonalStart();
        glCallList(axes);
        glCallList(object);
        glPrintX("X");
    glPrintY("Y");
    glPrintZ("Z");
        glFlush();
        orthogonalEnd();
        SwapBuffers(pDC->m_hDC);
        wglMakeCurrent(NULL, NULL);
}

void CRevolutionProjView::Reshape(CDC *pDC, int w, int h)
{
        AR = (double)w/(double)h;
        wd = w;
        ht = h;
        wglMakeCurrent(pDC->m_hDC, m_hrc);
        //---------------------------------
        glViewport (0, 0, (GLsizei) w, (GLsizei) h);
        glMatrixMode (GL_PROJECTION);
        glLoadIdentity ();
        gluPerspective (45, (GLfloat)w / (GLfloat)h, 0.1, 1000.0);
        glMatrixMode (GL_MODELVIEW);
        Invalidate();
        wglMakeCurrent(NULL, NULL);
}

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Is my projection correct ??

I am a Noobie, but why are you setting up a perspective view when you are going to use Orthogonal view later?
I beleive you need to make calls to

Code:

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glViewport (0,0, width, height);

        glMatrixMode (GL_PROJECTION);

        glLoadIdentity();

        // ORTHOGRAPHIC VIEW
       
      glOrtho(-aspectRatio*VERTEX_SCALE, aspectRatio*VERTEX_SCALE,
                VERTEX_SCALE, -VERTEX_SCALE,zNear, zFar);
       

        glMatrixMode(GL_MODELVIEW);

        glLoadIdentity();

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as you call orthogonalStart() as you are currently not switching to modify the projection matrix

EDIT: Also, Holy Crap you have a lot of topics up here. Ever try using google? ;)

Dear Friends Please give me suggestions why is it coming breaking the model. isn't my code correct ??
My drawscene and reshape functions are like this

Code:

---


void CRevolutionProjView::DrawScene(CDC *pDC)
{
        wglMakeCurrent(pDC->m_hDC, m_hrc);
        //---------------------------------
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        glEnable(GL_DEPTH_TEST);
        glPushMatrix();
        glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
        if (wd <= ht)
    glOrtho(-range, range, -range*ht/wd, range*ht/wd, -range, range);
    else
        glOrtho(-range*wd/ht, range*wd/ht, -range, range, -range, range);
        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();
        glTranslatef(trans[0], trans[1], trans[2]);
        glRotatef(rot[0], 1.0f, 0.0f, 0.0f);
        glRotatef(rot[1], 0.0f, 1.0f, 0.0f);
        glRotatef(rot[2], 0.0f, 0.0f, 1.0f);
        glScalef(zoomFactor,zoomFactor,zoomFactor);
        glCallList(object);
        glCallList(axes);
        glPrintX("X");
    glPrintY("Y");
        glPrintZ("Z");
        glPopMatrix();
        glFlush();
        SwapBuffers(pDC->m_hDC);
        wglMakeCurrent(NULL, NULL);
}

void CRevolutionProjView::Reshape(CDC *pDC, int w, int h)
{
        AR = (double)w/(double)h;
        wd = w;
        ht = h;
        wglMakeCurrent(pDC->m_hDC, m_hrc);
        //---------------------------------
        glViewport (0, 0, (GLsizei) w, (GLsizei) h);
        glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
        glMatrixMode (GL_MODELVIEW);
        wglMakeCurrent(NULL, NULL);
}

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Please give some comment where it's till going wrong. ?? Thanks a lot for reply. Sujan

check this file pic 1 is no distorsion and pic2 is distorted.....Please help me resolving this why is it happening......When I zoom in make the model large then its breaking at the top edge.

Quote:

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Originally Posted by sujan.dasmahapatra

check this file pic 1 is no distorsion and pic2 is distorted.....Please help me resolving this why is it happening......When I zoom in make the model large then its breaking at the top edge.

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That isn't distortion, it's clipping at the front clip plane. Do what kingting suggested to set the ortho view up, and make sure the zNear is small enough.

Thanks friends for your helps....my problem is solved. I needed to decraese the4 znear and increase zfar..That solved my problem. PLease help me in findijng bottom view and north aest and southeast view of my isometric view on my other threads. Thanks sujan