From 967caa8a91702510fc9b4a35292042802c27d14c Mon Sep 17 00:00:00 2001
From: Philipp Sehmisch <mana@crushnet.org>
Date: Mon, 14 Mar 2011 20:53:49 +0100
Subject: Script binding for the new screen shake effect.

The new lua function mana.chr_shake_screen can cause a screen shake
for a single client with variable x-intensity, y-intensity, decay and
duration.

I also added an example script which causes tremors for nearby characters
with intensity and direction relative to a specific point. The function
is not referenced on the example map because it is quite distracting.
---
 example/serverdata/scripts/npcs/shaker.lua | 48 ++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 example/serverdata/scripts/npcs/shaker.lua

(limited to 'example/serverdata/scripts/npcs')

diff --git a/example/serverdata/scripts/npcs/shaker.lua b/example/serverdata/scripts/npcs/shaker.lua
new file mode 100644
index 0000000..9d7bafb
--- /dev/null
+++ b/example/serverdata/scripts/npcs/shaker.lua
@@ -0,0 +1,48 @@
+----------------------------------------------------------------------------------
+--  Copyright 2009-2010 The Mana World Development Team                         --
+--                                                                              --
+--  This file is part of The Mana World.                                        --
+--                                                                              --
+--  The Mana World  is free software; you can redistribute  it and/or modify it --
+--  under the terms of the GNU General  Public License as published by the Free --
+--  Software Foundation; either version 2 of the License, or any later version. --
+----------------------------------------------------------------------------------
+
+shake_count = 0
+
+function shaker_update(npc)
+  shake_count = shake_count + 1
+  if shake_count > 20 then
+    shake_count = 0
+  
+    center_x = mana.posX(npc)
+    center_y = mana.posY(npc)
+    tremor(center_x, center_y, 300)
+    
+  end
+end
+
+-- function which causes a screen shake effect for all players near a
+-- certain point with an intensity and direction relative to said point
+function square(x)
+    return x * x
+end
+
+function tremor (center_x, center_y, intensity)
+    for dummy, object in ipairs(mana.get_beings_in_circle(center_x, center_y, intensity)) do
+        if mana.being_type(object) == TYPE_CHARACTER then
+            object_x = mana.posX(object)
+            object_y = mana.posY(object)
+            dist_x = object_x - center_x
+            dist_y = object_y - center_y
+            dist = math.sqrt(square(dist_x) + square(dist_y))
+            intensity_local = intensity - dist
+            intensity_x = (intensity - dist) * (dist_x / dist) / 5
+            intensity_y = (intensity - dist) * (dist_y / dist) / 5
+            mana.chr_shake_screen(object, intensity_x, intensity_y)
+        end
+    end
+end
+
+
+
-- 
cgit