这是我调用Matrix.translateM(model_matrix,-1.0f,0)时得到的结果：

这是没有翻译的图片：

这是我的渲染器代码.

@Override
public void onSurfaceCreated(GL10 unused,EGLConfig config) {
    GLES20.glClearColor(0.5f,0.5f,1.0f);
    GLES20.glDisable(GLES20.GL_DEPTH_TEST);
    GLES20.glEnable(GLES20.GL_BLEND);
    GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA,GLES20.GL_ONE_MINUS_SRC_ALPHA);
 
    // create programs
    simple_texture = new SimpleTexture();
 
    // create shapes
    square = new Square();
 
    // create debug text handlers
    text_fps = new Text(this.font,this.text_scale);
    text_fps.setSize(50);
    text_fps.setText("Test\nLonger line");
 
    // set camera position
    final float eyeX = 0.0f;
    final float eyeY = 0.0f;
    final float eyeZ = -3.0f;
 
    final float lookX = 0.0f;
    final float lookY = 0.0f;
    final float lookZ = 0.0f;
 
    final float upX = 0.0f;
    final float upY = 1.0f;
    final float upZ = 0.0f;
 
    Matrix.setLookAtM(view_matrix,eyeX,eyeY,eyeZ,lookX,lookY,lookZ,upX,upY,upZ);
}
 
@Override
public void onSurfaceChanged(GL10 unused,int width,int height) {
    GLES20.glViewport(0,width,height);
 
    // set projection matrix
    float ratio = (float) width / height;
    Matrix.orthoM(projection_matrix,-ratio,ratio,-1,1,3,7);
 
    setScreenRatio(ratio);
    setScreenHeight(height);
}
 
@Override
public void onDrawFrame(GL10 unused) {
    GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
 
    // calculate projection and view transformation
    Matrix.multiplyMM(vp_matrix,projection_matrix,view_matrix,0);
 
    // if we are connected to debugger draw statistics
    drawStatistics(vp_matrix);
}

这是我的文字绘图代码.

// use predefined program
    GLES20.glUseProgram(program);
 
    // get attribute positions
    attr_matrix = GLES20.glGetUniformLocation(program,"u_Matrix");
    attr_position = GLES20.glGetAttribLocation(program,"a_Position");
    attr_texture_position = GLES20.glGetAttribLocation(program,"a_TexturePosition");
    attr_texture = GLES20.glGetUniformLocation(program,"u_Texture");
 
    // set program parameters
    GLES20.glEnableVertexAttribArray(attr_position);
    GLES20.glVertexAttribPointer(attr_position,2,GLES20.GL_FLOAT,false,2 * 4,square_buffer);
 
    // set texture parameters
    GLES20.glEnableVertexAttribArray(attr_texture_position);
    GLES20.glVertexAttribPointer(attr_texture_position,texture_buffer);
 
    // set matrix
    float[] result = new float[16];
    float ratio = (float) texture_height / texture_width;
    float screen_scale = (float) texture_height / PageRenderer.getScreenHeight();
 
    Matrix.setIdentityM(model_matrix,0);
    Matrix.translateM(model_matrix,0);
    Matrix.scaleM(model_matrix,screen_scale,screen_scale * ratio,screen_scale);
 
    Matrix.setIdentityM(result,0);
    Matrix.multiplyMM(result,matrix,model_matrix,0);
    GLES20.glUniformMatrix4fv(attr_matrix,result,0);
 
    // assign texture
    GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D,index);
    GLES20.glUniform1i(attr_texture,0);
 
    // perform drawing
    GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP,4);
 
    // disable vertex array
    GLES20.glDisableVertexAttribArray(attr_position);
    GLES20.glDisableVertexAttribArray(attr_texture_position);

着色器：

int vertex_shader = PageRenderer.loadShader(
            GLES20.GL_VERTEX_SHADER,"uniform mat4 u_Matrix;" + 
            "attribute vec4 a_Position;" +
            "attribute vec2 a_TexturePosition;" +
            "varying vec2 v_TexturePosition;" +
            "void main() {" + 
            "   gl_Position = a_Position * u_Matrix;" +
            "   v_TexturePosition = a_TexturePosition;" +
            "}"
        );
    int fragment_shader = PageRenderer.loadShader(
            GLES20.GL_FRAGMENT_SHADER,"precision mediump float;" +
            "varying vec2 v_TexturePosition;" +
            "uniform sampler2D u_Texture;" +
            "void main() {" +
            "   gl_FragColor = texture2D(u_Texture,v_TexturePosition);" +
            "}"
        );

按预期缩放和旋转工作,但我无法弄清楚为什么翻译不会.
请注意,我最近才使用OpenGL.

我期待translateM将文本移动到左侧,而不是“旋转”它.