小编Ste*_*pic的帖子

ES 2.0新手在这里.我目前正在尝试使用ES 2.0和PowerVR SDK从立体图像制作一些3D隔行扫描图像.我可以输出一个图像纹理很好,但当我尝试输出第二个时,我似乎覆盖了第一个.所以,我的问题是,鉴于下面的片段着色器,我可以用它来绘制两个纹理,或者sampler2d均匀只能绑定到一个纹理单元吗？这是片段着色器(取自PowerVR"培训课程"示例程序):

    uniform sampler2D sampler2d;\
    varying mediump vec2    myTexCoord;\
    void main (void)\
    {\
        gl_FragColor = texture2D(sampler2d,myTexCoord);\
    }";

这是我如何将图像纹理加载到着色器中:

//LEFT IMAGE
glActiveTexture(GL_TEXTURE0);
glGenTextures(1, &m_uiTexture_left);                                    
glBindTexture(GL_TEXTURE_2D, m_uiTexture_left);
glUniform1i(glGetUniformLocation(m_uiProgramObject, "sampler2d"), 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, pwr2Width, pwr2Height,0, GL_RGB, GL_UNSIGNED_BYTE, xImageL); 
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
GLfloat afVertices[30] = {0.0};
genVertices(afVertices);
glGenBuffers(1, &m_ui32Vbo_leftimage);                                  
m_ui32VertexStride = 5 * sizeof(GLfloat); // 3 floats for the pos, 2 for the UVs
glBindBuffer(GL_ARRAY_BUFFER, m_ui32Vbo_leftimage);
glBufferData(GL_ARRAY_BUFFER, 6 * m_ui32VertexStride, afVertices, GL_STATIC_DRAW);  
glBindBuffer(GL_ARRAY_BUFFER, 0);

//RIGHT IMAGE
glActiveTexture(GL_TEXTURE1);
glGenTextures(1, …