我目前正在学习android的opengl es。我读过很多教程说坐标系是从-1f-1f（左下角）到1f-1f右上角。我能搞清楚的就这么多。但我目前正在试验的问题是，当我尝试调整三角形的大小时：窗口似乎正在根据我的极值调整自身的大小。如果这是我试图画的唯一的三角形，在两个不同的例子上
0f，0f，
0华氏度，0.01华氏度，
0.01华氏度，0.01华氏度
三角形和
0f，0f
0f、1f
一楼，一楼
老实说，我有点迷路了。这是我的代码：int vertexshaderid，fragmentshaderid；

int[] result = new int[1];
    _vertexSize = 2;
    _verticeCount = 3;
    _context = context;
    vertexShaderID = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
    fragmentShaderID = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
    GLES20.glShaderSource(vertexShaderID, _context.getString(R.string.vertexShader));
    GLES20.glShaderSource(fragmentShaderID, _context.getString(R.string.fragmentShader));
    _programID = GLES20.glCreateProgram();
    GLES20.glCompileShader(vertexShaderID);
    GLES20.glGetShaderiv(vertexShaderID, GLES20.GL_COMPILE_STATUS, result,0);
    GLES20.glCompileShader(fragmentShaderID);
    GLES20.glGetShaderiv(fragmentShaderID, GLES20.GL_COMPILE_STATUS, result,0);
    GLES20.glAttachShader(_programID, vertexShaderID);
    GLES20.glAttachShader(_programID, fragmentShaderID);
    GLES20.glLinkProgram(_programID);
    GLES20.glGetProgramiv(_programID, GLES20.GL_LINK_STATUS, result, 0);
    GLES20.glValidateProgram(_programID);

    GLES20.glGenBuffers(1,result,0);
    vertexBufferID = result[0];
    GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, vertexBufferID);
    FloatBuffer coordBuffer = FloatBuffer.allocate(_vertexSize * _verticeCount);
    coordBuffer.put(coords);
    coordBuffer.position(0);
    Log.d("count", "" + SIZEOF_FLOAT * _verticeCount * _vertexSize);
    GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER, SIZEOF_FLOAT * _verticeCount * _vertexSize, coordBuffer, GLES20.GL_DYNAMIC_DRAW);

    coordBuffer.clear();
    GLES20.glEnableVertexAttribArray(0);
    GLES20.glVertexAttribPointer(0,2,GLES20.GL_FLOAT,  true,2 * SIZEOF_FLOAT,0);
    Log.d("version", GLES20.glGetString(GLES20.GL_VERSION));

我也试着取代 GLES20.glVertexAttribPointer(0,2,GLES20.GL_FLOAT, true,2 * SIZEOF_FLOAT,0); 由 GLES20.glVertexAttribPointer(0,2,GLES20.GL_FLOAT, false,2 * SIZEOF_FLOAT,0); 事先谢谢你的帮助
p、 这是我的着色器 attribute highp vec2 inPosition; void main() { gl_Position = vec4(inPosition.x, inPosition.y,0.0,0.0) ; }