From 84e0e1e45f908f93d0a6a60632e0ff177addfb77 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Fri, 23 Dec 2022 22:01:34 +0100
Subject: Shots are now animated to see what direction they go

---
 kurator/src/Battle.cpp   | 24 +++++++++++++++++++-----
 kurator/src/components.h |  3 +++
 2 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/kurator/src/Battle.cpp b/kurator/src/Battle.cpp
index 8ecd571..d5390ae 100644
--- a/kurator/src/Battle.cpp
+++ b/kurator/src/Battle.cpp
@@ -72,6 +72,9 @@ Battle::update(const float dt)
 		pop.speed.x -= damp.x;
 		pop.speed.y -= damp.y;
 	}
+	auto lines = registry.view<Line>();
+	for (auto&& [entity, line] : lines.each())
+		line.position += 1.0 / line.duration * dt * time_factor;
 	balance.update(registry);
 	ImGui::SetNextWindowPos({GetScreenWidth()/2.0f, GetScreenHeight()-100.0f}, ImGuiCond_Once, {0.5f, 0.5f});
 	ImGui::SetNextWindowSize({240.0f, 0.0f}, ImGuiCond_Once);
@@ -99,11 +102,16 @@ Battle::draw() const
 	auto& registry = battle->registry();
 	auto lines = registry.view<Line>();
 	for (const auto& [entity, line] : lines.each()) {
+		const auto diff = line.end - line.start;
+		const auto fstart = line.position - line.hlength;
+		const auto fend = line.position + line.hlength;
+		const auto start = line.start + diff.scale(fstart > 0.0 ? fstart : 0.0);
+		const auto end = line.start + diff.scale(fend > 1.0 ? 1.0 : fend);
 		DrawLine(
-			hwidth + line.start.x*scale,
-			hheight + line.start.y*scale,
-			hwidth + line.end.x*scale,
-			hheight + line.end.y*scale,
+			hwidth + start.x*scale,
+			hheight + start.y*scale,
+			hwidth + end.x*scale,
+			hheight + end.y*scale,
 			line.color);
 	}
 	auto view = registry.view<const Marker, const sim::Transform>();
@@ -146,7 +154,13 @@ Battle::on_hit(const sim::Hit& hit)
 	registry.emplace<PopMove>(popup, sim::Point{0.0, -20}, 0.9998);
 	const auto line = registry.create();
 	registry.emplace<Timed>(line, 0.2, true);
-	registry.emplace<Line>(line, RED, source.position, victim.position);
+	registry.emplace<Line>(
+		line,
+		RED,
+		source.position,
+		victim.position,
+		1000.0 / (victim.position - source.position).magnitude(),
+		0.2);
 }
 
 
diff --git a/kurator/src/components.h b/kurator/src/components.h
index 0da3d6b..7d0239f 100644
--- a/kurator/src/components.h
+++ b/kurator/src/components.h
@@ -52,6 +52,9 @@ struct Line
 	Color color;
 	sim::Point start;
 	sim::Point end;
+	double hlength;
+	double duration;
+	double position = 0.0;
 };
 
 
-- 
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