使用 Line() 函数 TCPDF 计算线的起点和终点以创建五边形

Question

我知道 TCPDF 具有创建不同形状的内置功能。我有一个案例，我必须创建一条线并将点作为点 (8,2) 放置在它上面，将 0 视为线的中心。使用 tcpdf line() function. I created a line and placed dots on it see the screenshot below.

在此屏幕截图中，点 (8,2) 位于一条线上，其中 8 是距线中心的左侧点，2 是距线中心的右侧点。现在我必须将线旋转到 72 degrees 并将下一行与（左，右）点放在一起。对具有动态（左、右）点的总共 5 行重复相同的过程。

这是我目前使用的：

    $counter = 1;
    foreach($graph_points as $points){
        // center of the line
        $xc = 100;
        $yc = 150;

        if($counter > 1){
            $pdf->Rotate(-72, $xc, $yc);
        }
        
        $left = round($points->left);
        $left_perc = (($left*10)/100) * 50;


        $right = round($points->right);
        $right_perc = (($right*10)/100) * 50;


        $pdf->SetDrawColor(200, 200, 200);

        $pdf->Line($xc - 50 , $yc, $xc + 50 , $yc,array('width' => 0.5, 'cap' => 'butt', 'join' => 'miter', 'dash' => 0, 'color' => array(0, 0, 0)));
        
        $pdf->Line($xc, $yc - 2, $xc, $yc + 2,array('width' => 0.5, 'cap' => 'butt', 'join' => 'miter', 'dash' => 0, 'color' => array(0, 0, 0)));

        $pdf->Circle($xc - 50 + (50 - $left_perc), $yc, 1, 0, 360, 'DF', array('width' => 0.25, 'dash' => 0, 'color' => array(255,0,0)), array(210, 0, 0));

        $pdf->Text($xc - 53 + (50 - $left_perc), $yc - 7, $left, false, false, true, 0, 0, '', 0, '', 0, false, 'T', 'T');

        $pdf->Circle($xc + 50 - (50 - $right_perc), $yc, 1, 0, 360, 'DF', array('width' => 0.25, 'dash' => 0, 'color' => array(255,0,0)), array(210, 0, 0));

        $pdf->Text($xc + 47 - (50 - $right_perc), $yc - 7, $right, false, false, true, 0, 0, '', 0, '', 0, false, 'T', 'T');

        $counter++;
    }

下面的截图是这段代码的输出，我想要一个有 5 条线及其点的五角形。

我已经尝试了 2 天，但没有找到任何可行的解决方案。请建议我以使用线创建五边形的方式进行计算。

谢谢

更新

我设法创建了形状，但边彼此连接不均匀，这也影响了数字的文本位置。

代码如下：

    $counter = 1;
    $xc = 100;
    $yc = 150;
    foreach($graph_points as $points){
        // center of the line
       
        if($counter > 1){
            $xc = $xc - 65;
            $yc = $yc - 45;
            $pdf->Rotate(-72, $xc, $yc);
        }
        
        $left = round($points->left);
        $left_perc = (($left*10)/100) * 50;


        $right = round($points->right);
        $right_perc = (($right*10)/100) * 50;


        $pdf->SetDrawColor(200, 200, 200);

        $pdf->Line($xc - 50 , $yc, $xc + 50 , $yc,array('width' => 0.5, 'cap' => 'butt', 'join' => 'miter', 'dash' => 0, 'color' => array(0, 0, 0)));
        
        $pdf->Line($xc, $yc - 2, $xc, $yc + 2,array('width' => 0.5, 'cap' => 'butt', 'join' => 'miter', 'dash' => 0, 'color' => array(0, 0, 0)));

        $pdf->Circle($xc - 50 + (50 - $left_perc), $yc, 1, 0, 360, 'DF', array('width' => 0.25, 'dash' => 0, 'color' => array(255,0,0)), array(210, 0, 0));

        $pdf->Text($xc - 53 + (50 - $left_perc), $yc, $left, false, false, true, 0, 0, '', 0, '', 0, false, 'T', 'T');

        $pdf->Circle($xc + 50 - (50 - $right_perc), $yc, 1, 0, 360, 'DF', array('width' => 0.25, 'dash' => 0, 'color' => array(255,0,0)), array(210, 0, 0));

        $pdf->Text($xc + 47 - (50 - $right_perc), $yc, $right, false, false, true, 0, 0, '', 0, '', 0, false, 'T', 'T');

        $counter++;
    }

这是现在的截图。

Answer 1

经过3天的努力，我终于找到了一个可行的解决方案。在这里发布我的解决方案以防有人有相同的要求。

    $xc = 100;
    $yc = 200;
    $counter = 1;
    foreach($graph_points as $points){
        if($counter > 1){
            $xc = $xc - 39;
            $yc = $yc - 28;
            $pdf->Rotate(-72, $xc, $yc);
        }
        
        $left = round($points->left);
        $left_perc = (($left*10)/100) * 30;


        $right = round($points->right);
        $right_perc = (($right*10)/100) * 30;

        $pdf->SetDrawColor(200, 200, 200);

        $pdf->Line($xc - 30 , $yc, $xc + 30 , $yc,array('width' => 0.5, 'cap' => 'butt', 'join' => 'miter', 'dash' => 0, 'color' => array(0, 0, 0)));
        
        $pdf->Line($xc, $yc - 2, $xc, $yc + 2,array('width' => 0.5, 'cap' => 'butt', 'join' => 'miter', 'dash' => 0, 'color' => array(0, 0, 0)));

        $pdf->Circle($xc - 30 + (30 - $left_perc), $yc, 1, 0, 360, 'DF', array('width' => 0.25, 'dash' => 0, 'color' => array(255,0,0)), array(210, 0, 0));

        $pdf->Circle($xc + 30 - (30 - $right_perc), $yc, 1, 0, 360, 'DF', array('width' => 0.25, 'dash' => 0, 'color' => array(255,0,0)), array(210, 0, 0));

        $counter++;
    }

使用 Line() 函数 TCPDF 计算线的起点和终点以创建五边形

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