From cf19af1142a995eb9e9a7d6265c4b6e5d0ad714c Mon Sep 17 00:00:00 2001
From: karl <karl.bittner@hexaquo.at>
Date: Sat, 3 Oct 2020 00:56:49 +0200
Subject: [PATCH] Attempt at constant speed

Not working because linearly increasing t doesn't imply constant velocity within a segment between two points. Seems like a more complex approach will be necessary
---
 ECS/Components/PathMove.h    | 8 +++++++-
 ECS/Systems/PathMoveSystem.h | 5 ++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/ECS/Components/PathMove.h b/ECS/Components/PathMove.h
index b22fb50..22fab58 100644
--- a/ECS/Components/PathMove.h
+++ b/ECS/Components/PathMove.h
@@ -18,7 +18,12 @@ struct PathMove {
         std::vector<glm::quat> views;
     };
 
-    PathMove(double speed, Path path, Views views) : speed(speed), path(path), views(views) {}
+    PathMove(double speed, Path path, Views views) : speed(speed), path(path), views(views) {
+        // Calculate distances
+        for (int i = 0; i < path.points.size() - 1; i++) {
+            distances.emplace_back(glm::distance(path.points[i], path.points[i + 1]));
+        }
+    }
 
     double speed;
     float time_passed = 0.0;
@@ -28,5 +33,6 @@ struct PathMove {
 
     Path path;
     Views views;
+    std::vector<float> distances;
 };
 #endif // __PATHMOVE_H__
\ No newline at end of file
diff --git a/ECS/Systems/PathMoveSystem.h b/ECS/Systems/PathMoveSystem.h
index fa90ade..5a42a8f 100644
--- a/ECS/Systems/PathMoveSystem.h
+++ b/ECS/Systems/PathMoveSystem.h
@@ -85,7 +85,8 @@ class PathMoveSystem : public EntitySystem, public EventSubscriber<InputEvent> {
                     PathMove::Path path = pathmove->path;
 
                     // Add the passed time
-                    pathmove->time_passed += deltaTime;
+                    float desired_distance = deltaTime * pathmove->speed;  // TODO
+                    pathmove->time_passed += desired_distance / pathmove->distances[pathmove->current_point_index];
 
                     // Shorthand for number of points in the path
                     int num_points = path.points.size();
@@ -171,6 +172,8 @@ class PathMoveSystem : public EntitySystem, public EventSubscriber<InputEvent> {
 
                     // Apply
                     transform->set_rotation_from_quat(result);
+
+                    std::cout << pathmove->time_passed << std::endl;
                 });
     }