Question

我正在尝试在图像中显示三角形。不幸的是，我没有显示三角形，我无法找到原因。我在哪里搞砸了？这是代码：

    double hypotenuse = Math.sqrt(Math.pow((width_index-standard),2)+Math.pow((high_index-base_index),2));
    angle *= Math.asin(((width_index-standard)/hypotenuse));
    angle = angle*(180/Math.PI);
    angle = Math.round(angle);
    TextView t = (TextView) findViewById(R.id.result_angle);
    t.setText(String.valueOf(angle));

    // return_b is the bitmap to be displayed
    Canvas canvas = new Canvas(return_b);
    Path p = new Path();
    Paint paint = new Paint();

    p.moveTo(standard, (base_index+(float)hypotenuse));
    p.lineTo(standard, height-1);
    p.moveTo(standard, height-1);
    p.lineTo(width_index, high_index);
    p.moveTo(width_index, high_index);
    //p.addArc(standard, (base_index+(float)hypotenuse), width_index, high_index, 0, (float)((-1)*angle));
    p.lineTo(standard, (base_index+(float)hypotenuse));
    p.close();
    paint.setColor(Color.BLACK);
    paint.setStyle(Paint.Style.FILL);
    paint.setAntiAlias(true);
    canvas.drawPath(p, paint);

感谢。

Answer 1

问题发生在moveTo。当我删除它们时，三角形出现了。

三角形没有显示

1 个答案: