1 files changed, 79 insertions, 0 deletions
diff --git a/Examples/GIFPlot/Php/shadow/runme.php b/Examples/GIFPlot/Php/shadow/runme.php
new file mode 100644
index 000000000..3dffba050
--- /dev/null
+++ b/Examples/GIFPlot/Php/shadow/runme.php
@@ -0,0 +1,79 @@
+<?
+
+# Plot a 3D function
+include("gifplot.php");
+
+# Here is the function to plot
+function func($x, $y) {
+    return 5*cos(2*sqrt($x*$x+$y*$y))*exp(-0.3*sqrt($x*$x+$y*$y));
+}
+
+# Here are some plotting parameters
+$xmin = -5.0;
+$xmax =  5.0;
+$ymin = -5.0;
+$ymax =  5.0;
+$zmin = -5.0;
+$zmax =  5.0;
+
+# Grid resolution
+$nxpoints =  60;
+$nypoints =  60;
+
+$cmap  = new ColorMap("cmap");
+$frame = new FrameBuffer(500,500);
+$frame->clear(BLACK);
+
+
+$p3    = new Plot3D($frame,$xmin,$ymin,$zmin,$xmax,$ymax,$zmax);
+$p3->lookat(2*($zmax-$zmin));
+$p3->autoperspective(40);
+$p3->rotu(60);
+$p3->rotr(30);
+$p3->rotd(10);
+
+function drawsolid() {
+	global $xmax;
+	global $xmin;
+	global $ymax;
+	global $ymin;
+	global $zmin;
+	global $zmax;
+	global $nxpoints;
+	global $nypoints;
+	global $p3;
+
+    $p3->clear(BLACK);
+    $p3->start();
+    $dx = 1.0*($xmax-$xmin)/$nxpoints;
+    $dy = 1.0*($ymax-$ymin)/$nypoints;
+    $cscale = 240.0/($zmax-$zmin);
+    $x = $xmin;
+    for ($i = 0; $i < $nxpoints; $i++) {
+	$y = $ymin;
+	for ($j = 0; $j < $nypoints; $j++) {
+	    $z1 = func($x,$y);
+	    $z2 = func($x+$dx,$y);
+	    $z3 = func($x+$dx,$y+$dy);
+	    $z4 = func($x,$y+$dy);
+	    $c1 = $cscale*($z1-$zmin);
+	    $c2 = $cscale*($z2-$zmin);
+	    $c3 = $cscale*($z3-$zmin);
+	    $c4 = $cscale*($z4-$zmin);
+	    $c = ($c1+$c2+$c3+$c4)/4;
+	    if ($c < 0) { $c = 0; }
+	    if ($c > 239) { $c = 239; }
+	    $p3->solidquad($x,$y,$z1,$x+$dx,$y,$z2,$x+$dx,$y+$dy,$z3,$x,$y+$dy,$z4,$c+16);
+	    $y = $y + $dy;
+	}
+	$x = $x + $dx;
+    }
+}
+
+print "Making a nice 3D plot...\n";
+drawsolid();
+
+$frame->writeGIF($cmap,"image.gif");
+print "Wrote image.gif\n";
+
+?>