From 07b3ae994d0e68b5c266f5aa212024d5064847c2 Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <tullivan99@gmail.com>
Date: Sun, 15 Oct 2017 22:50:08 -0400
Subject: scriptable attacks?

---
 config/items.xml        | 15 +++++++++++++--
 include/systems/lua.hpp |  2 +-
 shaders/world.frag      |  2 +-
 src/attack.cpp          | 25 +++++++++++++++----------
 4 files changed, 30 insertions(+), 14 deletions(-)

diff --git a/config/items.xml b/config/items.xml
index cac7eb1..574ddda 100644
--- a/config/items.xml
+++ b/config/items.xml
@@ -19,15 +19,26 @@
 <!-- WEAPONS -->
 <item name="Wood Sword"     type="Sword"    damage="3"  maxStackSize="1"  sound="assets/sounds/longSwing.wav"  sprite="assets/items/SWORD_WOOD.png" cooldown="250">
 	<attack range="6, 2" power="1" effect="assets/effects/starAttack.gif">
-		update = function()
+		i = 1
+
+		effect = function()
 			flash(255, 0, 0)
 			damage(8)
 		end
+
+		hit = function()
+			if (i &lt; 30) then
+				xrange = i
+				i = i + 1
+			else
+				xrange = 0
+			end
+		end
 	</attack>
 </item>
 <item name="Hunters Bow"    type="Bow"      damage="2"  maxStackSize="1"    sprite="assets/items/bow.png" cooldown="600">
 	<attack effect="assets/effects/starAttack.gif">
-		update = function()
+		effect = function()
 			flash(255, 0, 255)
 			damage(4)
 		end
diff --git a/include/systems/lua.hpp b/include/systems/lua.hpp
index 2df038a..1137308 100644
--- a/include/systems/lua.hpp
+++ b/include/systems/lua.hpp
@@ -44,11 +44,11 @@ public:
 		lua_setglobal(state, name.c_str());
 	}
 
+	void operator()(const std::string& func = "update") const;
 	void operator()(const std::string& func, std::vector<LuaVariable> vars) const;
 	void operator()(const std::string& func, std::vector<double>& rets, std::vector<LuaVariable> vars) const;
 	void operator()(std::vector<LuaVariable> vars) const;
 	void operator()(std::vector<double>& rets, std::vector<LuaVariable> vars) const;
-	void operator()(const std::string& func = "update") const;
 };
 
 class LuaSystem {
diff --git a/shaders/world.frag b/shaders/world.frag
index 87d86ca..d6f4395 100644
--- a/shaders/world.frag
+++ b/shaders/world.frag
@@ -17,7 +17,7 @@ void main()
 	vec4 pixTex = texture2D(texture, texLoc);
     if (pixTex.a < 0.1f) 
 		discard;
-  
+   
 	vec4 shadeColor = vec4(0.0f, 0.0f, 0.0f, 0.0f);
 	if (lightImpact > 0.0f) {
 		for (int i = 0; i < lightSize; i++) {
diff --git a/src/attack.cpp b/src/attack.cpp
index c4ad95b..b104736 100644
--- a/src/attack.cpp
+++ b/src/attack.cpp
@@ -75,7 +75,7 @@ void AttackSystem::update(entityx::EntityManager& en, entityx::EventManager& ev,
 			(void)health;
 			if (!e.has_component<Player>() && inrange(ppos.x, pos.x, pos.x + dim.width) && inrange(ppos.y, pos.y - 2, pos.y + dim.height)) {
 				lua::setEntity(&e);
-				hit.attack->script();
+				hit.attack->script("effect");
 				if (hit.effect.size() > 0)
 					effects.emplace_back(vec2(ppos.x, ppos.y), hit.effect);
 				//ParticleSystem::addMultiple(15, ParticleType::SmallBlast,
@@ -91,9 +91,13 @@ void AttackSystem::update(entityx::EntityManager& en, entityx::EventManager& ev,
 
 	// handle emitted attacks (player's)
 	for (const auto& a : attacks) {
+		//vec2 point = a.pos + a.attack.offset;
+		//vec2 size = a.attack.range;
+		//point.y -= size.y / 2; // center range height
+		
 		vec2 point = a.pos + a.attack.offset;
-		vec2 size = a.attack.range;
-		point.y -= size.y / 2; // center range height
+		vec2 size;
+		a.attack.script("hit", {LuaVariable("xrange", size.x)});
 
 		en.each<Position, Solid, Health>(
 			[&](entityx::Entity e, Position& pos, Solid& dim, Health& h) {
@@ -104,7 +108,7 @@ void AttackSystem::update(entityx::EntityManager& en, entityx::EventManager& ev,
 				if (inrange(point.x, pos.x, pos.x + dim.width, HLINES(size.x)) &&
 					inrange(point.y, pos.y, pos.y + dim.height, HLINES(size.y))) {
 					lua::setEntity(&e);
-					a.attack.script();
+					a.attack.script("effect");
 					if (a.attack.effect.size() > 0)
 						effects.emplace_back(point, a.attack.effect);
 					//ParticleSystem::addMultiple(15, ParticleType::DownSlash,
@@ -126,13 +130,14 @@ void AttackSystem::render(void)
 	for (auto& ae : effects) {
 		ae.effect(ae.counter / RATE); // bind current frame
 		auto dim = ae.effect.getTextureDim();
+		auto s = ae.pos - (dim / 2);
 		GLfloat verts[] = {
-			ae.pos.x,         ae.pos.y,         z, 0, 0,
-			ae.pos.x + dim.x, ae.pos.y,         z, 1, 0,
-			ae.pos.x + dim.x, ae.pos.y + dim.y, z, 1, 1,
-			ae.pos.x + dim.x, ae.pos.y + dim.y, z, 1, 1,
-			ae.pos.x,         ae.pos.y + dim.y, z, 0, 1,
-			ae.pos.x,         ae.pos.y,         z, 0, 0
+			s.x,         s.y,         z, 0, 0,
+			s.x + dim.x, s.y,         z, 1, 0,
+			s.x + dim.x, s.y + dim.y, z, 1, 1,
+			s.x + dim.x, s.y + dim.y, z, 1, 1,
+			s.x,         s.y + dim.y, z, 0, 1,
+			s.x,         s.y,         z, 0, 0
 		};
 		glVertexAttribPointer(Render::worldShader.coord, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), verts);
 		glVertexAttribPointer(Render::worldShader.tex, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), verts + 3);
-- 
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