我试着画一个半透明的盒子，里面有不透明的东西。类似这样：

的数据
对于半透明的盒子，我也创建了一个纹理（whitebg.jpg），我想应用：

的
到目前为止，这是我尝试的：

主要功能

private static void CreateItems(List<Items> packedItems)
 {
  Glut.glutInit();
  Glut.glutInitDisplayMode(Glut.GLUT_DOUBLE | Glut.GLUT_DEPTH);
  Glut.glutInitWindowSize(width, height);
  Glut.glutCreateWindow("pack");
  Glut.glutIdleFunc(OnRenderFrame);
  Glut.glutDisplayFunc(OnDisplay);
  Glut.glutKeyboardFunc(OnKeyboardDown);
  Glut.glutKeyboardUpFunc(OnKeyboardUp);
  Glut.glutMouseWheelFunc(OnMouseWheel);
  Glut.glutCloseFunc(OnClose);
  Glut.glutReshapeFunc(OnReshape);
  Gl.Disable(EnableCap.DepthTest);
  Gl.Enable(EnableCap.Blend);
  Gl.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
  program = new ShaderProgram(VertexShader, FragmentShader);
  program.Use();
  program["projection_matrix"].SetValue(Matrix4.CreatePerspectiveFieldOfView(0.45f, (float)width / height, 0.1f, 1000f));
  program["view_matrix"].SetValue(Matrix4.LookAt(new Vector3(0, 0, 10), Vector3.Zero, new Vector3(0, 1, 0)));
  program["light_direction"].SetValue(new Vector3(0, 0, 1));
  program["enable_lighting"].SetValue(lighting);
  bgTexture = new Texture("whitebg.jpg"); 
 }

字符串

• 酒店GLUT. ALIDLEFUNC**

private static void OnRenderFrame()
{
 watch.Stop();
 float deltaTime = (float)watch.ElapsedTicks / System.Diagnostics.Stopwatch.Frequency;
 watch.Restart();
 // perform rotation of the cube depending on the keyboard state
 if (autoRotate)
 {
    xangle += deltaTime / 2;
    yangle += deltaTime;
 }
 if (right) yangle += deltaTime;
 if (left) yangle -= deltaTime;
 if (up) xangle -= deltaTime;
 if (down) xangle += deltaTime;
 // set up the viewport and clear the previous depth and color buffers
 Gl.Viewport(0, 0, width, height);
 Gl.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
 // make sure the shader program and texture are being used
 Gl.UseProgram(program);
 Gl.BindTexture(bgTexture);
 // set up the model matrix and draw the cube
 program["model_matrix"].SetValue(Matrix4.CreateRotationY(yangle) * Matrix4.CreateRotationX(xangle));
 program["enable_lighting"].SetValue(lighting);
 for (int i = 0; i < virtual_items.Count; i++)
 {
    Gl.BindBufferToShaderAttribute(virtual_items[i], program, "vertexPosition");
    Gl.BindBufferToShaderAttribute(virtual_items_color[i], program, "vertexColor");
    Gl.BindBuffer(virtual_items_quads[i]);
    Gl.DrawElements(BeginMode.Quads, virtual_items_quads[i].Count, DrawElementsType.UnsignedInt, IntPtr.Zero);
 }
 Gl.BindBufferToShaderAttribute(virtual_container, program, "vertexPosition");
 Gl.BindBufferToShaderAttribute(virtual_container_normals, program, "vertexNormal");
 Gl.BindBufferToShaderAttribute(virtual_container_UV, program, "vertexUV");
 Gl.BindBuffer(virtual_container_Quads);
 Gl.DrawElements(BeginMode.Quads, virtual_container_Quads.Count, DrawElementsType.UnsignedInt, IntPtr.Zero);
 Glut.glutSwapBuffers();
}

型
但得到的结果是不是我所期望的。纹理是适用于框，也在里面的项目。这里有一个例子，我有一个框（2x1x1）和两个项目（1x1x1）：

的
有没有可能只在盒子上应用纹理，并保持物品的真实的不透明颜色，就像第一张图片一样？