Long live Qt 4.5!

1 files changed, 58 insertions, 0 deletions

diff --git a/examples/script/context2d/scripts/plasma.js b/examples/script/context2d/scripts/plasma.js
new file mode 100644
index 0000000..1aa9294
--- /dev/null
+++ b/examples/script/context2d/scripts/plasma.js
@@ -0,0 +1,58 @@
+var counter = 0;
+
+var PIXEL_SIZE = 4;
+
+var temp_1 = 0;
+
+function init()
+{
+    setInterval('render()',50);
+}
+
+function dist(a, b, c, d)
+{
+    return Math.sqrt((a - c) * (a - c) + (b - d) * (b - d));
+}
+
+
+function render()
+{
+    var canvas = document.getElementById('tutorial');
+    canvas.resize(128, 128);
+    var ctx = canvas.getContext('2d');
+    ctx.save();
+
+    var time = counter * 5;
+
+
+    for( y = 0; y < 128; y+=PIXEL_SIZE) {
+	for( x = 0 ; x < 128; x+=PIXEL_SIZE) {
+	    
+	    
+	    var temp_val = Math.floor(Math.sin(dist(x + time, y, 128.0, 128.0) / 8.0)
+				      + Math.sin(dist(x, y, 64.0, 64.0) / 8.0)
+				      + Math.sin(dist(x, y + time / 7, 192.0, 64) / 7.0)
+				      + Math.sin(dist(x, y, 192.0, 100.0) / 8.0));
+	    
+	    
+	    
+	    
+	    var temp_col = Math.floor((2 + temp_val) * 50);
+	    
+	    var rand_red = temp_col * 3;
+	    var rand_green = temp_col  ;
+	    var rand_blue = 128 - temp_col;
+
+	    ctx.fillStyle = "rgb("+rand_red+","+rand_green+","+rand_blue+")";
+
+	    ctx.fillRect(x,y,PIXEL_SIZE,PIXEL_SIZE);
+	}
+    }
+
+
+    ctx.restore();
+    counter++;
+
+}
+
+init();