OpenGl不顯示使用VBO的三角形

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我想在OpenGL中顯示2個簡單的三角形，但它們不會出現，儘管檢查了很多網站。我忘記了代碼中的任何內容嗎？OpenGl不顯示使用VBO的三角形

#define BUFFER_OFFSET(bytes) ((GLubyte*) NULL + (bytes)) 


    // Prepare: 
    GLfloat vertices[]={0,0,1, 
     0.5,0,-0.5, 
     0,0,0, 
     0,0,1, 
     0,0,0, 
     -0.5,0,-0.5}; 
    GLushort indices[]={0,1,2,3,4,5}; 

    GLfloat *generatedVertices=new GLfloat[18]; 
    GLushort *generatedIndices=new GLushort[6]; 
    GLfloat *colors=new GLfloat[18]; 

    glGenBuffers(3, triangleBuffers); // triangleBuffers = Global GLuint 

     for (int p=0;p<6;p++) 
     { 
      MVector V(vertices[p*3],vertices[p*3+1],vertices[p*3+2]); // Maya type 
      generatedVertices[p*3]=V.x; 
      generatedVertices[p*3+1]=V.y; 
      generatedVertices[p*3+2]=V.z; 

      generatedIndices[p]=p; 

      colors[p*3]=0.8f; 
      colors[p*3+1]=0.6f; 
      colors[p*3+2]=0.0f; 
     } 


    // vertices 
    glBindBuffer(GL_ARRAY_BUFFER, data->triangleBuffers[0]); 
    glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat)*18, generatedVertices, GL_STATIC_DRAW); 

    // indices 
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, data->triangleBuffers[1]); 
    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLushort)*6, generatedIndices, GL_STATIC_DRAW); 

    // couloirs 
    glBindBuffer(GL_ARRAY_BUFFER, data->triangleBuffers[2]); 
    glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat)*18*data->totalSize, colors, GL_STATIC_DRAW);

// Render: 
    glEnableClientState(GL_VERTEX_ARRAY); 
    glEnableClientState(GL_COLOR_ARRAY); 

    glBindBuffer(GL_ARRAY_BUFFER, data->triangleBuffers[0]); 
    glVertexPointer(3, GL_FLOAT, 0, BUFFER_OFFSET(0)); 

    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, data->triangleBuffers[1]); 

    glBindBuffer(GL_ARRAY_BUFFER, data->triangleBuffers[2]); 
    glColorPointer(3, GL_FLOAT, 0, BUFFER_OFFSET(0)); 

    glDrawElements(GL_TRIANGLES, totalSize*6, GL_UNSIGNED_INT, 0); 

    glDisableClientState(GL_VERTEX_ARRAY); 
    glDisableClientState(GL_COLOR_ARRAY);

來源

2016-11-28 Laurent Crivello

您以'GLushort'格式上傳索引，但是在繪製調用中您聲稱它的格式爲'GL_UNSIGNED_INT'。 – BDL

相機的位置是多少？如果它在'y軸'上具有'0'的位置，那麼這意味着，根據您的頂點。你不會看到三角形，因爲你正在畫兩個三角形。嘗試以下頂點; '0,1,0 - 0,0,0 - 0.5，-0.5,0'對於三角形 – marko5049

BDL：良好的捕捉，糾正但仍然不顯示任何東西 –