winforms - OpenGL混叠？

Question

我正在使用 Forms 开发 win7 microsoft visual studio 08。我刚换了显卡，我的应用程序中出现了某种混叠。

可以看出，灰线有点混叠，也是几乎不可见的参考系统。

知道如何解决这个问题吗？

我将发布部分代码以防万一：1：绘画功能

private: void Paint(){



        int w = glControl1->Width;
        int h = glControl1->Height;


        float aspect_ratio = w / (float)h;
        Matrix4 perpective = Matrix4::CreatePerspectiveFieldOfView(MathHelper::PiOver4, aspect_ratio, 0.1f, 100000.0f);
        GL::MatrixMode(MatrixMode::Projection);
        GL::LoadMatrix(perpective);

        GL::MatrixMode(MatrixMode::Modelview);
        GL::LoadIdentity();
        GL::Viewport(0, 0, w, h);

        //Situacion de la camara en el espacio
        Matrix4 lookat = Matrix4::LookAt(100, 100, 100, 0, 0, 0, 0, 0, 1);
        GL::LoadMatrix(lookat);

        GL::Scale(this->zoom, this->zoom, this->zoom);


        GL::Rotate(xrot, 1.0f, 0.0f, 0.0f);
        GL::Rotate(yrot, 0.0f, 1.0f, 0.0f);
        GL::Clear(ClearBufferMask::ColorBufferBit | ClearBufferMask::DepthBufferBit);
           GL::ClearColor(Color::LightGray);



        Draw3Daxis();
        if (allowDraw){
            DrawSurface();
            }
        }

2：绘制图片中显示的所有内容的函数（它只是一堆GL::Vertex3）

System::Void Draw3Daxis(){
         OpcionesPlot* opciones;
         opciones=OpcionesPlot::Instance();
         int extra=2;
         int sqrnumber=10;

        //Planos en los ejes
        GL::Color3(Color::White);
        GL::Begin(BeginMode::Quads);
        if(opciones->draw3DXYaxis){
            GL::Vertex3(0,0,0);
            GL::Vertex3(LENGTH,0,0);
            GL::Vertex3(LENGTH,LENGTH,0);
            GL::Vertex3(0,LENGTH,0);
         }
         if(opciones->draw3DXZaxis){
             GL::Vertex3(0,0,0);
             GL::Vertex3(LENGTH,0,0);
             GL::Vertex3(LENGTH,0,LENGTH);
             GL::Vertex3(0,0,LENGTH);
         }
         if(opciones->draw3DYZaxis){
             GL::Vertex3(0,0,0);
             GL::Vertex3(0,LENGTH,0);
             GL::Vertex3(0,LENGTH,LENGTH);
             GL::Vertex3(0,0,LENGTH);
        }
         GL::End();


         // ejes XYZ
         GL::Color3(Color::Black);
         GL::Begin(BeginMode::Lines);
         if(opciones->draw3DXYaxis){
            GL::Vertex3(0,0,0);
            GL::Vertex3(LENGTH+extra,0,0);
            GL::Vertex3(0,0,0);
            GL::Vertex3(0,LENGTH+extra,0);
         }
         if(opciones->draw3DXZaxis){
             GL::Vertex3(0,0,0);
             GL::Vertex3(LENGTH+extra,0,0);
             GL::Vertex3(0,0,0);
             GL::Vertex3(0,0,LENGTH+extra);
         }
         if(opciones->draw3DYZaxis){
             GL::Vertex3(0,0,0);
             GL::Vertex3(0,LENGTH+extra,0);
             GL::Vertex3(0,0,0);
             GL::Vertex3(0,0,LENGTH+extra);
        }

         //--> lineas de los planos
         GL::Color3(Color::DarkGray);
         for(int i=1;i<=sqrnumber;i++){
             if(i==sqrnumber)
                 GL::Color3(Color::Black);
             if(opciones->draw3DXYaxis){
                 GL::Vertex3(LENGTH/sqrnumber*i,0,0);
                 GL::Vertex3(LENGTH/sqrnumber*i,LENGTH,0);
                 GL::Vertex3(0,LENGTH/sqrnumber*i,0);
                 GL::Vertex3(LENGTH,LENGTH/sqrnumber*i,0);
             }
             if(opciones->draw3DXZaxis){
                 GL::Vertex3(LENGTH/sqrnumber*i,0,0);
                 GL::Vertex3(LENGTH/sqrnumber*i,0,LENGTH);
                 GL::Vertex3(0,0,LENGTH/sqrnumber*i);
                 GL::Vertex3(LENGTH,0,LENGTH/sqrnumber*i);

             }
             if(opciones->draw3DYZaxis){
                 GL::Vertex3(0,0,LENGTH/sqrnumber*i);
                 GL::Vertex3(0,LENGTH,LENGTH/sqrnumber*i);
                 GL::Vertex3(0,LENGTH/sqrnumber*i,0);
                 GL::Vertex3(0,LENGTH/sqrnumber*i,LENGTH);
             }

         }
        GL::End();
        // triangulos para los ejes
        //----->cuadrado
        GL::Color3(Color::Black);
        GL::Begin(BeginMode::Quads);
        float quadside=0.7;
        if(opciones->draw3DXYaxis){
            GL::Vertex3((float)LENGTH+extra,quadside,quadside);
            GL::Vertex3((float)LENGTH+extra,-quadside,quadside);
            GL::Vertex3((float)LENGTH+extra,-quadside,-quadside);
            GL::Vertex3((float)LENGTH+extra,quadside,-quadside);

            GL::Vertex3(quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(-quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(-quadside,(float)LENGTH+extra,-quadside);
            GL::Vertex3(quadside,(float)LENGTH+extra,-quadside);


         }
         if(opciones->draw3DXZaxis){
            GL::Vertex3((float)LENGTH+extra,quadside,quadside);
            GL::Vertex3((float)LENGTH+extra,-quadside,quadside);
            GL::Vertex3((float)LENGTH+extra,-quadside,-quadside);
            GL::Vertex3((float)LENGTH+extra,quadside,-quadside);

            GL::Vertex3(quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(-quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(-quadside,-quadside,(float)LENGTH+extra);
            GL::Vertex3(quadside,-quadside,(float)LENGTH+extra);
         }
         if(opciones->draw3DYZaxis){
            GL::Vertex3(quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(-quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(-quadside,(float)LENGTH+extra,-quadside);
            GL::Vertex3(quadside,(float)LENGTH+extra,-quadside);

            GL::Vertex3(quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(-quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(-quadside,-quadside,(float)LENGTH+extra);
            GL::Vertex3(quadside,-quadside,(float)LENGTH+extra);

        }
        GL::End();


        // --> triangulos para hacer la punta
        GL::Begin(BeginMode::Triangles);
        if(opciones->draw3DXYaxis){
            GL::Vertex3((float)LENGTH+extra,quadside,quadside);
            GL::Vertex3((float)LENGTH+extra,-quadside,quadside);
            GL::Vertex3(LENGTH+extra+5,0,0);
            GL::Vertex3((float)LENGTH+extra,-quadside,quadside);
            GL::Vertex3((float)LENGTH+extra,-quadside,-quadside);
            GL::Vertex3(LENGTH+extra+5,0,0);
            GL::Vertex3((float)LENGTH+extra,-quadside,-quadside);
            GL::Vertex3((float)LENGTH+extra,quadside,-quadside);
            GL::Vertex3(LENGTH+extra+5,0,0);
            GL::Vertex3((float)LENGTH+extra,quadside,-quadside);
            GL::Vertex3((float)LENGTH+extra,quadside,quadside);
            GL::Vertex3(LENGTH+extra+5,0,0);

            GL::Vertex3(quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(-quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(0,LENGTH+extra+5,0);
            GL::Vertex3(-quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(-quadside,(float)LENGTH+extra,-quadside);
            GL::Vertex3(0,LENGTH+extra+5,0);
            GL::Vertex3(-quadside,(float)LENGTH+extra,-quadside);
            GL::Vertex3(quadside,(float)LENGTH+extra,-quadside);
            GL::Vertex3(0,LENGTH+extra+5,0);
            GL::Vertex3(quadside,(float)LENGTH+extra,-quadside);
            GL::Vertex3(quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(0,LENGTH+extra+5,0);

        }
        if(opciones->draw3DXZaxis){
            GL::Vertex3((float)LENGTH+extra,quadside,quadside);
            GL::Vertex3((float)LENGTH+extra,-quadside,quadside);
            GL::Vertex3(LENGTH+extra+5,0,0);
            GL::Vertex3((float)LENGTH+extra,-quadside,quadside);
            GL::Vertex3((float)LENGTH+extra,-quadside,-quadside);
            GL::Vertex3(LENGTH+extra+5,0,0);
            GL::Vertex3((float)LENGTH+extra,-quadside,-quadside);
            GL::Vertex3((float)LENGTH+extra,quadside,-quadside);
            GL::Vertex3(LENGTH+extra+5,0,0);
            GL::Vertex3((float)LENGTH+extra,quadside,-quadside);
            GL::Vertex3((float)LENGTH+extra,quadside,quadside);
            GL::Vertex3(LENGTH+extra+5,0,0);

            GL::Vertex3(quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(-quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(0,0,LENGTH+extra+5);
            GL::Vertex3(-quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(-quadside,-quadside,(float)LENGTH+extra);
            GL::Vertex3(0,0,LENGTH+extra+5);
            GL::Vertex3(-quadside,-quadside,(float)LENGTH+extra);
            GL::Vertex3(quadside,-quadside,(float)LENGTH+extra);
            GL::Vertex3(0,0,LENGTH+extra+5);
            GL::Vertex3(quadside,-quadside,(float)LENGTH+extra);
            GL::Vertex3(quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(0,0,LENGTH+extra+5);
         }
         if(opciones->draw3DYZaxis){
            GL::Vertex3(quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(-quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(0,LENGTH+extra+5,0);
            GL::Vertex3(-quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(-quadside,(float)LENGTH+extra,-quadside);
            GL::Vertex3(0,LENGTH+extra+5,0);
            GL::Vertex3(-quadside,(float)LENGTH+extra,-quadside);
            GL::Vertex3(quadside,(float)LENGTH+extra,-quadside);
            GL::Vertex3(0,LENGTH+extra+5,0);
            GL::Vertex3(quadside,(float)LENGTH+extra,-quadside);
            GL::Vertex3(quadside,(float)LENGTH+extra,quadside);
            GL::Vertex3(0,LENGTH+extra+5,0);

            GL::Vertex3(quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(-quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(0,0,LENGTH+extra+5);
            GL::Vertex3(-quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(-quadside,-quadside,(float)LENGTH+extra);
            GL::Vertex3(0,0,LENGTH+extra+5);
            GL::Vertex3(-quadside,-quadside,(float)LENGTH+extra);
            GL::Vertex3(quadside,-quadside,(float)LENGTH+extra);
            GL::Vertex3(0,0,LENGTH+extra+5);
            GL::Vertex3(quadside,-quadside,(float)LENGTH+extra);
            GL::Vertex3(quadside,quadside,(float)LENGTH+extra);
            GL::Vertex3(0,0,LENGTH+extra+5);

        }
        GL::End();
        Write3D(LENGTH,3,3,GLUT_BITMAP_9_BY_15,"X");
        Write3D(3,LENGTH,3,GLUT_BITMAP_9_BY_15,"Y");
        Write3D(3,3,LENGTH,GLUT_BITMAP_9_BY_15,"Z");
     }

score 2 · Accepted Answer

Try disabling depth testing before drawing each set of objects (reference planes first, axes second and then the reference grid).

It looks like your axes are Z-fighting the reference planes.

You have multiple options -

Disable depth test when drawing the lines (not the planes). This will make sure that no z-fighting occurs.
Keep depth testing on, but use glPolygonOffset when drawing the planes to offset them so that z-fighting does not happen at all.
Use GL_LEQUAL (or whatever else) as the DepthFunc when drawing the planes, but use GL_EQUAL when drawing the lines. This should make things ok.

winforms - OpenGL混叠？

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