seed r670 - trunk/examples

[racarr svn gnome org]

Author: racarr
Date: Wed Jan  7 10:10:58 2009
New Revision: 670
URL: http://svn.gnome.org/viewvc/seed?rev=670&view=rev

Log:
Add clutter COGL example.

Added:
   trunk/examples/clutter-cogl.js   (contents, props changed)

Added: trunk/examples/clutter-cogl.js
==============================================================================
--- (empty file)
+++ trunk/examples/clutter-cogl.js	Wed Jan  7 10:10:58 2009
@@ -0,0 +1,116 @@
+#!/usr/local/bin/seed
+Seed.import_namespace("Clutter");
+Seed.import_namespace("GLib");
+
+const RIPPLE_S = 2000;
+const RIPPLE_W = 8;
+const RIPPLE_G = 2;
+const RIPPLE_N = 5;
+const RIPPLE_MIND = 150;
+const RIPPLE_MAXD = 2000;
+const RIPPLE_WX = Clutter.double_to_fixed(RIPPLE_W);
+
+const SCREEN_W = 640;
+const SCREEN_H = 480;
+
+function angle_from_deg(x)
+{
+	return (((x) * 1024.0) / 360.0);
+}
+
+function destroy_actor(actor)
+{
+	actor.destroy();
+}
+
+function circle_paint (actor)
+{
+	var fill_color = new Clutter.Color({red: 0xff,
+									   green: 0xff,
+									   blue: 0xff});
+	
+	var radius = Clutter.double_to_fixed(actor.width/2);
+	
+	fill_color.alpha = actor.opacity;
+	
+	Clutter.cogl_color(fill_color);
+	Clutter.cogl_path_move_to(radius, radius);
+	Clutter.cogl_path_arc(radius, radius, radius, radius,
+						  angle_from_deg(0),
+						  angle_from_deg(360));
+	Clutter.cogl_path_line_to(radius - RIPPLE_WX/2, radius);
+	Clutter.cogl_path_arc(radius, radius, 
+						  radius-RIPPLE_WX/2, radius-RIPPLE_WX/2,
+						  angle_from_deg(0),
+						  angle_from_deg(360));
+	Clutter.cogl_path_close();
+	Clutter.cogl_path_fill();	
+}
+
+function ripple(stage, x, y)
+{
+	var transp = new Clutter.Color();
+	
+	var n = parseInt(Math.random()*RIPPLE_N)+1;
+	
+	for (i = 0; i < n; i++)
+	{
+		var actor = new Clutter.Rectangle({color: transp});
+		
+		var size = ((RIPPLE_W * 2) * (i+1)) + (RIPPLE_G * i);
+		
+		actor.width = actor.height = size;
+		actor.set_anchor_point_from_gravity(Clutter.Gravity.Center);
+		actor.x = x;
+		actor.y = y;
+		actor.opacity = 0x80;
+		
+		stage.add_actor(actor);
+		
+		actor.signal["paint"].connect(circle_paint);
+		Clutter.effect_scale(template,actor,
+							 SCREEN_W / RIPPLE_W,
+							 SCREEN_W / RIPPLE_W);
+		Clutter.effect_fade(template, actor,
+							0x00,
+							destroy_actor);
+						
+	}
+}
+
+Clutter.init(null, null);
+
+var template = 
+	new Clutter.EffectTemplate.for_duration(RIPPLE_S,
+											Clutter.sine_inc_func);
+
+var stage = new Clutter.Stage();
+stage.width = SCREEN_W; stage.height = SCREEN_H;
+stage.color = {red: 0xe0, green: 0xf2, 
+			   blue: 0xfc, alpha: 0xff};
+
+stage.signal["button_press_event"].connect(
+	function(stage, event)
+	{
+		ripple(stage, event.button.x, event.button.y);
+		
+		return true;
+	});
+
+stage.show();
+
+function random_ripple()
+{
+	ripple(stage,
+		   Math.random()*SCREEN_W,
+		   Math.random()*SCREEN_H);
+	GLib.timeout_add(Math.random()*RIPPLE_MAXD + RIPPLE_MIND,
+					 random_ripple);
+	return false;
+}
+
+random_ripple();
+
+Clutter.main();
+
+