PHP Classes

PHP 3D Model Viewer Class: Render a 3D object from the shapes definitions

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model-3d-class 1.0Custom (specified...5PHP 5, Graphics, Physics


This class can render a 3D object from the shapes definitions

It takes a list of nodes of the edges and lines of the model of a 3D object and renders an image that shows the lines and the edges of the described object. The class can also add lines for the ground plane.

The the rendered image of the 3D model object is stored in a class variable that is set to a image object created by the PHP GD extension.

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$model3d = new Model3D();
$model3d->drawGridXY(80, 80);

header("Content-type: image/png");

// generate nodes and lines for a truss3d
$node = array();
$line = array();
$n = 4; // no of in-scribed polygon sides
$m = 2; // no of storey
$dh =200; // height of each storey
$r = 120; // radius of polygon
$dr = -20; // reduce radius per storey
$dang = 360/$n;
$startang = $dang/2;
        for (
$ang = $startang+$i*$dang;
$ang = $ang/180.0*pi();
$x = ($r+$dr*$j)*cos($ang);
$y = ($r+$dr*$j)*sin($ang);
$z = $j*$dh;
$node[] = array(
"x" => $x,
"y" => $y,
"z" => $z,
"dof" => "000",
"dx" => 0.00,
"dy" => 0.00,
"dz" => 0.0
$i1 = ($i+$n*$j)%$n;
$j1 = ($i+$n*$j+1)%$n;
                if (
$j < $m){
$line[] = array(
"I" => $n*($j+1)+$i1,
"J" => $n*($j+1)+$j1,
"Mat" => 0,
"Sec" => 0
$line[] = array(
"I" => $n*$j+$i1,
"J" => $n*($j+1)+$i1,
"Mat" => 0,
"Sec" => 0
$line[] = array(
"I" => $n*$j+$i1,
"J" => $n*($j+1)+$j1,
"Mat" => 0,
"Sec" => 0
$model->drawNodesLine($node, $line);



3dimensional perspective drawing class


* [Model3D] class create 3 dimensional perspective view by projecting 3d coordinate system onto 2d canvas. * Current model provide 2 modes, z axis vertical and y axis vertical. * This simplest first version implement only 3 dimensional line drawing and wire frame that include 3d nodes and connected lines. * 3D object is centeted at PROJECTION_CENTER center point on the canvas view. View rotation is defined with $ROT about vertical axis. * Coordinate system obey right-hand-rule.

##Sample 1. Drawtower1.php is a sample file that use Model3D class and create 3d trustal tower. 2. index.php is a sample for the html file.

##Permission * This class is free for the educational use as long as maintain this header together with this class. Contact author for other uses.

* Author: Win Aung Cho * Contact * version 1.0 * Date: 4-11-2020

  • Screenshot_20201104-052828_Chrome.jpg
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Accessible without login Plain text file drawtower1.php Example Example script
Accessible without login Plain text file index.php Aux. Auxiliary script
Accessible without login Plain text file LICENSE Lic. License text
Plain text file model3d.php Class Class source
Accessible without login Plain text file Doc. Documentation

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