Question

我想使用opengl并排显示两个图像（一个图像在屏幕左侧，另一个在屏幕右侧）。我已经在下面的着色器代码中使用了它。它以全屏显示两个图像。但是只能看到两个图像的一部分。我应该在哪里纠正代码以在两面都显示完整图像？

private void CreateShaders()
{
    /***********Vert Shader********************/
    vertShader = GL.CreateShader(ShaderType.VertexShader);
    GL.ShaderSource(vertShader, @"attribute vec3 a_position;
                                varying vec2 vTexCoord;
                                void main()
                                {
                                    vTexCoord = (a_position.xy + 1) / 2;
                                    gl_Position = vec4(a_position, 1);
                                }");
    GL.CompileShader(vertShader);

    /***********Frag Shader ****************/
    fragShader = GL.CreateShader(ShaderType.FragmentShader);
    GL.ShaderSource(fragShader, @"precision highp float;
                                uniform sampler2D sTexture;uniform sampler2D sTexture1;
                                uniform int screenwidth;
                                varying vec2 vTexCoord;
                                void main ()
                                {
                                    vec4 color = texture2D (sTexture, vTexCoord);  //image 1                            
                                    vec4 color1=texture2D (sTexture1, vTexCoord); //image2
                                    if(vTexCoord.x<0.5)
                                        gl_FragColor = color;
                                    else
                                        gl_FragColor    = color1;
                                }");
    GL.CompileShader(fragShader);
}

Answer 1

您必须在片段着色器中缩放和转换纹理坐标的<bookstore> <book genre="autobiography" publicationdate="1981" ISBN="1-861003-11-0"> <title>The Autobiography of Benjamin Franklin</title> <author> <first-name>Benjamin</first-name> <last-name>Franklin</last-name> </author> <price>8.99</price> </book> </bookstore> my second xml after generation : <bookstore> <book genre="autobiography" publicationdate="1981" ISBN="1-861003-11-0"> <title>The Autobiography of Benjamin Franklin</title> <author> <first-name>Benjamin</first-name> <last-name>Franklin</last-name> </author> <price>8.99</price> </book> <book genre="novel" publicationdate="1967" ISBN="0-201-63361-2"> <title>The Confidence Man</title> <author> <first-name>Herman</first-name> <last-name>Melville</last-name> </author> <price>11.99</price> </book> </bookstore>分量，

左侧为纹理坐标x，右边是vec2(vTexCoord.x*2.0, vTexCoord.y)：

vec2(vTexCoord.x*2.0-1.0, vTexCoord.y))

并排显示两个图像-OpenGL

1 个答案: