# Implementation of php3 pie chart

Source: Internet
Author: User
The implementation of the php3 pie chart, reading the implementation of the php3 pie chart, has always wanted to post something. Recently, I just finished php_gd.dll in php4, so I can't wait to do some graphics program. I have seen many examples of php pie charts. I have looked at them all in two dimensions, so I want to make a three-dimensional one. After the efforts to complete pie3d, we will share some good things with you. But the younger brother is new to php "> <LINKhref =" http:

I always wanted to post something. Recently, I just finished php_gd.dll in php4, so I can't wait to do some graphics program. I have seen many examples of php pie charts. I have looked at them all in two dimensions, so I want to make a three-dimensional one. After the efforts to complete pie3d, we will share some good things with you. However, the younger brother is a beginner in php and the code may not be refined enough. I hope you will give me some advice on how to improve this program. Remember to inform me (estorm@yeah.net)

+ ------------------------ +
| Pie3dfun. php // public function |
+ ------------------------ +

Define ("ANGLE_STEP", 5); // defines the angle step when an elliptical arc is drawn.
Function chx_getdarkcolor (\$ img, \$ clr) {// Evaluate the dark color of \$ clr
\$ Rgb = imagecolorsforindex (\$ img, \$ clr );
Return array (\$ rgb ["red"]/2, \$ rgb ["green"]/2, \$ rgb ["blue"]/2 );
}

Function chx_getexy (\$ a, \$ B, \$ d) {// calculates the coordinate of the point on the ellipse corresponding to the angle \$ d
\$ D = deg 2rad (\$ d );
Return array (round (\$ a * Cos (\$ d), round (\$ B * Sin (\$ d )));
}

Function chx_arc (\$ img, \$ ox, \$ oy, \$ a, \$ B, \$ sd, \$ ed, \$ clr) {// elliptical arc function
\$ N = ceil (\$ ed-\$ sd)/ANGLE_STEP );
\$ D = \$ sd;
List (\$ x0, \$ y0) = chx_getexy (\$ a, \$ B, \$ d );
For (\$ I = 0; \$ I <\$ n; \$ I ++ ){
\$ D = (\$ d + ANGLE_STEP)> \$ ed? \$ Ed :( \$ d + ANGLE_STEP );
List (\$ x, \$ y) = chx_getexy (\$ a, \$ B, \$ d );
Imageline (\$ img, \$ x0 + \$ ox, \$ y0 + \$ oy, \$ x + \$ ox, \$ y + \$ oy, \$ clr );
\$ X0 = \$ x;
\$ Y0 = \$ y;
}
}
Function chx_sector (\$ img, \$ ox, \$ oy, \$ a, \$ B, \$ sd, \$ ed, \$ clr) {// draw a fan
\$ N = ceil (\$ ed-\$ sd)/ANGLE_STEP );
\$ D = \$ sd;
List (\$ x0, \$ y0) = chx_getexy (\$ a, \$ B, \$ d );
Imageline (\$ img, \$ x0 + \$ ox, \$ y0 + \$ oy, \$ ox, \$ oy, \$ clr );
For (\$ I = 0; \$ I <\$ n; \$ I ++ ){
\$ D = (\$ d + ANGLE_STEP)> \$ ed? \$ Ed :( \$ d + ANGLE_STEP );
List (\$ x, \$ y) = chx_getexy (\$ a, \$ B, \$ d );
Imageline (\$ img, \$ x0 + \$ ox, \$ y0 + \$ oy, \$ x + \$ ox, \$ y + \$ oy, \$ clr );
\$ X0 = \$ x;
\$ Y0 = \$ y;
}
Imageline (\$ img, \$ x0 + \$ ox, \$ y0 + \$ oy, \$ ox, \$ oy, \$ clr );
List (\$ x, \$ y) = chx_getexy (\$ a/2, \$ B/2, (\$ d + \$ sd)/2 );
Imagefill (\$ img, \$ x + \$ ox, \$ y + \$ oy, \$ clr );
}

Function chx_sector3d (\$ img, \$ ox, \$ oy, \$ a, \$ B, \$ v, \$ sd, \$ ed, \$ clr) {// 3d fan surface
Chx_sector (\$ img, \$ ox, \$ oy, \$ a, \$ B, \$ sd, \$ ed, \$ clr );
If (\$ sd <180 ){
List (\$ R, \$ G, \$ B) = chx_getdarkcolor (\$ img, \$ clr );
\$ Clr = imagecolorallocate (\$ img, \$ R, \$ G, \$ B );
If (\$ ed> 180) \$ ed = 180;
List (\$ sx, \$ sy) = chx_getexy (\$ a, \$ B, \$ sd );
\$ Sx + = \$ ox;
\$ Sy + = \$ oy;
List (\$ ex, \$ ey) = chx_getexy (\$ a, \$ B, \$ ed );
\$ Ex + = \$ ox;
\$ Ey + = \$ oy;
Imageline (\$ img, \$ sx, \$ sy, \$ sx, \$ sy + \$ v, \$ clr );
Imageline (\$ img, \$ ex, \$ ey, \$ ex, \$ ey + \$ v, \$ clr );
Chx_arc (\$ img, \$ ox, \$ oy + \$ v, \$ a, \$ B, \$ sd, \$ ed, \$ clr );
List (\$ sx, \$ sy) = chx_getexy (\$ a, \$ B, (\$ sd + \$ ed)/2 );
\$ Sy + = \$ oy + \$ v/2;
\$ Sx + = \$ ox;
Imagefill (\$ img, \$ sx, \$ sy, \$ clr );
}
}

Function chx_getindexcolor (\$ img, \$ clr) {// Convert RBG to index color
\$ R = (\$ clr> 16) & 0xff;
\$ G = (\$ clr> 8) & 0xff;
\$ B = (\$ clr) & 0xff;
Return imagecolorallocate (\$ img, \$ R, \$ G, \$ B );
}

?>

+ -------------------------- +
| Pie3d. php // 3D pie chart File |
+ -------------------------- +

Require ("pie3dfun. php ");

\$ A = 150; // long half-axis of the ellipse
\$ B = 50; // half axis of the elliptical segment
\$ V = 20; // pie height
\$ Font = 5; // font

\$ Ox = 5 + \$;
\$ Oy = 5 + \$ B;
\$ Fw = imagefontwidth (\$ font );
\$ Fh = imagefontheight (\$ font );

\$ DatLst = array (30, 10, 20, 20, 10, 20, 10, 20); // data
\$ LabLst = array ("a1", "a2", "a3", "a4", "a5", "a6", "a7", "a8 "); // tag
\$ ClrLst = array (0x99ff00, 0xff6666, 0x0099ff, 0xff99ff, 0xffff99, 0x99ffff, 0xff3333, 0x009999 );

\$ W = 10 + \$ a * 2;
\$ H = 10 + \$ B * 2 + \$ v + (\$ fh + 2) * count (\$ datLst );

\$ Img = imagecreate (\$ w, \$ h );

// Convert RGB to index color
For (\$ I = 0; \$ I
\$ Clrbk = imagecolorallocate (\$ img, 0xff, 0xff, 0xff );
\$ Clrt = imagecolorallocate (\$ img, 0x00,0x00,0x00 );
// Fill in the background color
Imagefill (\$ img, 0, 0, \$ clrbk );
// Sum
\$ Tot = 0;
For (\$ I = 0; \$ I
\$ Sd = 0;
\$ Ed = 0;
\$ Ly = 10 + \$ B * 2 + \$ v;
For (\$ I = 0; \$ I \$ sd = \$ ed;
\$ Ed + = \$ datLst [\$ I]/\$ tot * 360;
// Draw a pie
Chx_sector3d (\$ img, \$ ox, \$ oy, \$ a, \$ B, \$ v, \$ sd, \$ ed, \$ clrLst [\$ I]); // \$ sd, \$ ed, \$ clrLst [\$ I]);
// Draw tags
Imagefilledrectangle (\$ img, 5, \$ ly, 5 + \$ fw, \$ ly + \$ fh, \$ clrLst [\$ I]);
Imagerectangle (\$ img, 5, \$ ly, 5 + \$ fw, \$ ly + \$ fh, \$ clrt );
Imagestring (\$ img, \$ font, 5 + 2 * \$ fw, \$ ly,
\$ LabLst [\$ I]. ":". \$ datLst [\$ I]. "(". (round (10000 * (\$ datLst [\$ I]/\$ tot)/100 ). "% )",
\$ Clrt );
\$ Ly + = \$ fh + 2;
}
// Output image
Header ("Content-type: image/gif ");
Imagegif (\$ img );

?>

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