Question

我正在为android实现opengl-es活动。我在nexus 4上遇到了奇怪的画面。在nexus-s上，一切看起来都像我期待的那样。这是我的渲染器代码：

public void onSurfaceChanged(GL10 gl, int width, int height) {
    Log.d(TAG, "onSurfaceChanged");
    if (height == 0) { 
        height = 1; 
    }
    this.width = width;
    this.height = height;
    cellsh = height / cellSize;
    cellsw = width / cellSize;
    gl.glViewport(0, 0, width, height); // Reset The Current Viewport
    gl.glMatrixMode(GL10.GL_PROJECTION); // Select The Projection Matrix
    gl.glLoadIdentity(); // Reset The Projection Matrix
    gl.glDisable(GL10.GL_DEPTH_TEST);// disable Z coordinate
    gl.glOrthof(0f, width, height, 0, 0, 1);
    gl.glMatrixMode(GL10.GL_MODELVIEW); // Select The Modelview Matrix
    gl.glLoadIdentity();
}


@Override
public void onSurfaceCreated(GL10 gl,
        javax.microedition.khronos.egl.EGLConfig config) {
    Log.d(TAG, "onSurfaceCreated");
    gl.glShadeModel(GL10.GL_SMOOTH); 
    gl.glClearColor(0.0f, 0.0f, 0.0f, 0.5f); 
    gl.glClearDepthf(1.0f); 
    gl.glEnable(GL10.GL_DEPTH_TEST); 
    gl.glDepthFunc(GL10.GL_LEQUAL); 
    gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_NICEST);

}
public void onDrawFrame(GL10 gl) {

    gl.glLoadIdentity();
    gl.glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
    gl.glTranslatef(cellSize / 2, cellSize / 2, 0f);
    for (int i = 0; i < cellsw; i++) {
        for (int j = 0; j < cellsh; j++) {
            if (Cells.firstGen()) {
                if (Cells.getCell(j, i)) {
                    Coloriry(gl, 2);
                } else {
                    Coloriry(gl, 1);
                }
                gl.glScalef(squareSize / 2f, squareSize / 2f, 1f);
                quad.draw(gl); // Draw triangle ( NEW )
                gl.glScalef(1 / (squareSize / 2f), 1 / (squareSize / 2f), 1);
                gl.glTranslatef(0.0f, cellSize, 0.0f);
                continue;
            }
            if (Cells.getOldCell(j, i) != Cells.getCell(j, i)) {
                if (Cells.getCell(j, i)) {
                    Coloriry(gl, 2);
                } else {
                    Coloriry(gl, 1);
                }
                gl.glScalef(squareSize / 2f, squareSize / 2f, 1f);
                quad.draw(gl);
                gl.glScalef(1 / (squareSize / 2f), 1 / (squareSize / 2f), 1);
            }
            gl.glTranslatef(0.0f, cellSize, 0.0f);
        }
        gl.glTranslatef(cellSize, -cellsh * cellSize, 0.0f);
    }

    Cells.nextGen();

    frames += 1;
}

以下是来自Nexus S和Nexus 4的截图。 Nexus4 Nexus S

Answer 1

我觉得麻烦在你的坐标系中。宽度，高度，细胞，细胞，细胞大小是否浮动？你怎么计算它们？ api的目标是什么？

Answer 2

通过添加

修复丑陋的Nexus 4图片

gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);

到onDrawFrame的开头。但现在我不知道如何只绘制变化的区域，而不是全屏。

关于nexus 4的奇怪的opengl-es图片

2 个答案: