New lightning animation for elder mage.

Also added a blank hex-sized image, since there didn't seem to be one
already (needed for empty [missile_frame]s).

data/campaigns/Heir_To_The_Throne/units/Elder_Mage.cfg

@@ -13,9 +13,9 @@ image="units/elder-mage-defend.png"
 profile=portraits/delfador.png
 hitpoints=55
 movement_type=smallfoot
-	[resistance]
-	fire=80
-	[/resistance]
+    [resistance]
+    fire=80
+    [/resistance]
 movement=6
 experience=100
 level=5
@@ -28,78 +28,125 @@ get_hit_sound=human-male-hit.ogg
 die_sound=human-male-die.ogg
 
 unit_description= _ "Once great, Elder Magi have seen their power a little diminished from wearying years of battle. Nevertheless they remain feared on the battlefield on account of their powerful lightning bolts."
-	[attack]
-	name=staff
-	icon=attacks/staff-magic.png
-	type=impact
-	range=melee
-	damage=8
-	number=2
-		[animation]
-		hit=yes
-		[frame]
-		begin=-100
-		end=100
-		sound=staff.wav
-		image="units/elder-mage-attack.png"
-		[/frame]
-		[/animation]
-		[animation]
-		hit=no
-		[frame]
-		begin=-100
-		end=100
-		sound=miss.wav
-		image="units/elder-mage-attack.png"
-		[/frame]
-		[/animation]
-	[/attack]
-	
-	[attack]
-	name=lightning
-	icon=attacks/lightning.png
-	type=fire
-	range=ranged
-	special=magical
-	damage=14
-	number=4
-		[animation]
-		hit=yes
-		[frame]
-		begin=-600
-		end=0
-		image="units/elder-mage-ranged.png"
-		halo=halo/elder-mage-halo1.png:100,halo/elder-mage-halo2.png:100,halo/elder-mage-halo3.png:100,halo/elder-mage-halo4.png:100,halo/elder-mage-halo5.png:100,halo/elder-mage-halo6.png:100
-		halo_x,halo_y=13,-376
-		sound=lightning.ogg
-		[/frame]
-		[missile_frame]
-		begin=-100
-		end=0
-		image="projectiles/lightning-n.png"
-		image_diagonal="projectiles/lightning-ne.png"
-#		halo=halo/elder-mage-halo7.png
-#		halo_x,halo_y=13,-26
-		[/missile_frame]
-		[/animation]
-		[animation]
-		hit=no
-		[frame]
-		begin=-600
-		end=0
-		image="units/elder-mage-ranged.png"
-		halo=halo/elder-mage-halo1.png:100,halo/elder-mage-halo2.png:100,halo/elder-mage-halo3.png:100,halo/elder-mage-halo4.png:100,halo/elder-mage-halo5.png:100,halo/elder-mage-halo6.png:100
-		halo_x,halo_y=13,-376
-		sound=lightning-miss.ogg
-		[/frame]
-		[missile_frame]
-		begin=-100
-		end=0
-		image="projectiles/lightning-n.png"
-		image_diagonal="projectiles/lightning-ne.png"
-#		halo=halo/elder-mage-halo7.png
-#		halo_x,halo_y=13,-26
-		[/missile_frame]
-		[/animation]
-	[/attack]
+    [attack]
+    name=staff
+    icon=attacks/staff-magic.png
+    type=impact
+    range=melee
+    damage=8
+    number=2
+        [animation]
+        hit=yes
+        [frame]
+        begin=-100
+        end=100
+        sound=staff.wav
+        image="units/elder-mage-attack.png"
+        [/frame]
+        [/animation]
+        [animation]
+        hit=no
+        [frame]
+        begin=-100
+        end=100
+        sound=miss.wav
+        image="units/elder-mage-attack.png"
+        [/frame]
+        [/animation]
+    [/attack]
+
+    [attack]
+    name=lightning
+    icon=attacks/lightning.png
+    type=fire
+    range=ranged
+    special=magical
+    damage=14
+    number=4
+
+        # The lightning bolt animation is a little complex; the bolt itself is
+        # done as an animated halo, and so it needs to have different halo_x and
+        # halo_y coordinates for all six directions. For this reason I wrote
+        # this macro, which is also used to create the bolt variations.
+
+        #define ELDER_MAGE_LIGHTNING_BOLTS VARIATION DIR HALO_X HALO_Y
+            [animation]
+                hits=no
+                direction={DIR}
+
+                [frame]
+                    begin=-300
+                    end=-150
+                    sound=lightning-miss.ogg
+                [/frame]
+                [frame]
+                    begin=-150
+                    end=0
+                    image="units/elder-mage-ranged.png"
+                    halo=halo/lightning-bolt-{VARIATION}-1.png:51,halo/lightning-bolt-{VARIATION}-2.png:51,halo/lightning-bolt-{VARIATION}-4.png:51
+                    halo_x,halo_y={HALO_X},{HALO_Y}
+                [/frame]
+                [missile_frame]
+                    begin=-100
+                    end=0
+                    image="misc/blank-hex.png"
+                    image_diagonal="misc/blank-hex.png"
+                [/missile_frame]
+            [/animation]
+
+            [animation]
+                hits=yes
+                direction={DIR}
+
+                [frame]
+                    begin=-300
+                    end=-150
+                    sound=lightning.ogg
+                [/frame]
+                [frame]
+                    begin=-200
+                    end=0
+                    image="units/elder-mage-ranged.png"
+                    halo=halo/lightning-bolt-{VARIATION}-1.png:51,halo/lightning-bolt-{VARIATION}-2.png:51,halo/lightning-bolt-{VARIATION}-3.png:51,halo/lightning-bolt-{VARIATION}-4.png:50
+                    halo_x,halo_y={HALO_X},{HALO_Y}
+                [/frame]
+                [missile_frame]
+                    begin=-100
+                    end=0
+                    image="misc/blank-hex.png"
+                    image_diagonal="misc/blank-hex.png"
+                [/missile_frame]
+            [/animation]
+        #enddef
+
+        # The three variations for the north direction:
+
+        {ELDER_MAGE_LIGHTNING_BOLTS 1 n 0 -210}
+        {ELDER_MAGE_LIGHTNING_BOLTS 2 n 0 -210}
+        {ELDER_MAGE_LIGHTNING_BOLTS 3 n 0 -210}
+
+        # The three variations for the south direction:
+
+        {ELDER_MAGE_LIGHTNING_BOLTS 1 s 0 -72}
+        {ELDER_MAGE_LIGHTNING_BOLTS 2 s 0 -72}
+        {ELDER_MAGE_LIGHTNING_BOLTS 3 s 0 -72}
+
+        # And so on...
+
+        {ELDER_MAGE_LIGHTNING_BOLTS 1 se 54 -104}
+        {ELDER_MAGE_LIGHTNING_BOLTS 2 se 54 -104}
+        {ELDER_MAGE_LIGHTNING_BOLTS 3 se 54 -104}
+
+        {ELDER_MAGE_LIGHTNING_BOLTS 1 sw 54 -104}
+        {ELDER_MAGE_LIGHTNING_BOLTS 2 sw 54 -104}
+        {ELDER_MAGE_LIGHTNING_BOLTS 3 sw 54 -104}
+
+        {ELDER_MAGE_LIGHTNING_BOLTS 1 ne 54 -176}
+        {ELDER_MAGE_LIGHTNING_BOLTS 2 ne 54 -176}
+        {ELDER_MAGE_LIGHTNING_BOLTS 3 ne 54 -176}
+
+        {ELDER_MAGE_LIGHTNING_BOLTS 1 nw 54 -176}
+        {ELDER_MAGE_LIGHTNING_BOLTS 2 nw 54 -176}
+        {ELDER_MAGE_LIGHTNING_BOLTS 3 nw 54 -176}
+    [/attack]
 [/unit]