php 3D饼图类绘制类函数
下面关于php 3D饼图类绘制类函数实现原理是根据//椭圆长半轴等参数绘制一个3D饼图形的代码,代码如下:
<?php class chart { var $a; //椭圆长半轴 var $b; //椭圆短半轴 var $DataArray; //每个扇形的数据 var $ColorArray; //每个扇形的颜色 要求按照十六进制书写但前面不加0x //为边缘及阴影为黑色 function chart($pa = 100, $pb = 60, $sData = "100,200,300,400,500,300", $sColor = "ee00ff,dd0000,cccccc,ccff00,00ccff,ccff00") { $this->a = $pa; $this->b = $pb; $this->DataArray = split(",", $sData); $this->ColorArray = split(",", $sColor); } function setA($v) { $this->a = $v; } function getA() { return $this->a; } function setB($v) { $this->b = $v; } function getB() { return $this->b; } function setDataArray($v) { $this->DataArray = split(",", $v); } function getDataArray($v) { return $this->DataArray; } function setColorArray($v) { $this->ColorArray = split(",", $v); } function getColorArray() { return $this->ColorArray; } function DrawPie() { $image = imagecreate($this->a * 2 + 40, $this->b * 2 + 40); $PieCenterX = $this->a + 10; $PieCenterY = $this->b + 10; $DoubleA = $this->a * 2; $DoubleB = $this->b * 2; list($R, $G, $B) = getRGB(0); $colorBorder = imagecolorallocate($image, $R, $G, $B); $DataNumber = count($this->DataArray); //$DataTotal for ($i = 0; $i < $DataNumber; $i++) $DataTotal+= $this->DataArray[$i]; //算出数据和 //填充背境 imagefill($image, 0, 0, imagecolorallocate($image, 0xFF, 0xFF, 0xFF)); /* ** 画每一个扇形 */ $Degrees = 0; for ($i = 0; $i < $DataNumber; $i++) { $StartDegrees = round($Degrees); $Degrees+= (($this->DataArray[$i] / $DataTotal) * 360); $EndDegrees = round($Degrees); $percent = number_format($this->DataArray[$i] / $DataTotal * 100, 1); list($R, $G, $B) = getRGB(hexdec($this->ColorArray[$i])); $CurrentColor = imagecolorallocate($image, $R, $G, $B); if ($R > 60 and $R < 256) $R = $R - 60; if ($G > 60 and $G < 256) $G = $G - 60; if ($B > 60 and $B < 256) $B = $B - 60; $CurrentDarkColor = imagecolorallocate($image, $R, $G, $B); //画扇形弧 imagearc($image, $PieCenterX, $PieCenterY, $DoubleA, $DoubleB, $StartDegrees, $EndDegrees, $CurrentColor); //画直线 list($ArcX, $ArcY) = pie_point($StartDegrees, $this->a, $this->b); imageline($image, $PieCenterX, $PieCenterY, floor($PieCenterX + $ArcX) , floor($PieCenterY + $ArcY) , $CurrentColor); //画直线 list($ArcX, $ArcY) = pie_point($EndDegrees, $this->a, $this->b); imageline($image, $PieCenterX, $PieCenterY, ceil($PieCenterX + $ArcX) , ceil($PieCenterY + $ArcY) , $CurrentColor); //填充扇形 $MidPoint = round((($EndDegrees - $StartDegrees) / 2) + $StartDegrees); list($ArcX, $ArcY) = Pie_point($MidPoint, $this->a * 3 / 4, $this->b * 3 / 4); imagefilltoborder($image, floor($PieCenterX + $ArcX) , floor($PieCenterY + $ArcY) , $CurrentColor, $CurrentColor); imagestring($image, 2, floor($PieCenterX + $ArcX - 5) , floor($PieCenterY + $ArcY - 5) , $percent . "%", $colorBorder); //画阴影 if ($StartDegrees >= 0 and $StartDegrees <= 180) { if ($EndDegrees <= 180) { for ($k = 1; $k < 15; $k++) imagearc($image, $PieCenterX, $PieCenterY + $k, $DoubleA, $DoubleB, $StartDegrees, $EndDegrees, $CurrentDarkColor); } else { for ($k = 1; $k < 15; $k++) imagearc($image, $PieCenterX, $PieCenterY + $k, $DoubleA, $DoubleB, $StartDegrees, 180, $CurrentDarkColor); } } } /*到此脚本已经生了一幅图像了 **现在需要的是把它发到浏览器上,重要的一点是要将标头发给浏览器,让它知道是一个GIF文件。不然的话你只能看到一堆奇怪的乱码 */ //输出生成的图片 header("Content-type: image/gif"); imagegif($image); imagedestroy($image); } //End drawPie() } //End class //实现 $objp = new chart(); $objp->DrawPie();
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