From ab3f6c98ffa6bba1821e3fe8add5eebecc2a0658 Mon Sep 17 00:00:00 2001
From: SeanOMik <seanomik@gmail.com>
Date: Fri, 23 Sep 2022 00:54:18 -0400
Subject: [PATCH] Create a simple RotatingComponent

---
 examples/dev_testing/src/main.cpp             |  2 ++
 .../ecs/component/rotating_component.h        | 31 +++++++++++++++++++
 src/scene.cpp                                 |  5 +++
 3 files changed, 38 insertions(+)
 create mode 100644 include/simpleengine/ecs/component/rotating_component.h

diff --git a/examples/dev_testing/src/main.cpp b/examples/dev_testing/src/main.cpp
index 5ff3a3d..d58be80 100644
--- a/examples/dev_testing/src/main.cpp
+++ b/examples/dev_testing/src/main.cpp
@@ -3,6 +3,7 @@
 #include "simpleengine/ecs/component/mesh_component.h"
 #include <simpleengine/ecs/component/model_component.h>
 #include "simpleengine/ecs/component/transform_component.h"
+#include <simpleengine/ecs/component/rotating_component.h>
 #include "simpleengine/ecs/entity.h"
 #include "simpleengine/gfx/light.h"
 #include "simpleengine/gfx/material.h"
@@ -184,6 +185,7 @@ int main(int argc, char *argv[]) {
     // Create an Entity in the Scene and add components to it.
     se::ecs::Entity entity = scene->create_entity();
     entity.add_component<se::ModelComponent>("examples/dev_testing/resources/dragon.obj");
+    entity.add_component<se::RotatingComponent>();
     auto& transform_comp = entity.add_component<se::TransformComponent>();
     transform_comp.translate(12.f, -4.f, 0.f);
     
diff --git a/include/simpleengine/ecs/component/rotating_component.h b/include/simpleengine/ecs/component/rotating_component.h
new file mode 100644
index 0000000..ab33827
--- /dev/null
+++ b/include/simpleengine/ecs/component/rotating_component.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <glm/glm.hpp>
+
+namespace simpleengine {
+    /**
+     * @brief A component that will rotate the transform every frame.
+     * 
+     */
+    class RotatingComponent {
+    public:
+        float rate;
+        glm::vec3 rotation_axis;
+
+        RotatingComponent() : rate(10.f), rotation_axis(glm::vec3(0, 1, 0)) {
+
+        }
+
+        RotatingComponent(float rate) : rate(rate), rotation_axis(glm::vec3(0, 1, 0)) {
+
+        }
+
+        RotatingComponent(glm::vec3 rotation_axis) : rotation_axis(rotation_axis) {
+
+        }
+
+        RotatingComponent(float rate, glm::vec3 rotation_axis) : rate(rate), rotation_axis(rotation_axis) {
+
+        }
+    };
+}
\ No newline at end of file
diff --git a/src/scene.cpp b/src/scene.cpp
index 00bdb9e..c2caeff 100644
--- a/src/scene.cpp
+++ b/src/scene.cpp
@@ -2,6 +2,7 @@
 #include "ecs/component/mesh_component.h"
 #include "ecs/component/model_component.h"
 #include "ecs/component/transform_component.h"
+#include "ecs/component/rotating_component.h"
 #include "ecs/entity.h"
 #include "gfx/renderer.h"
 
@@ -25,5 +26,9 @@ namespace simpleengine {
         registry.view<const TransformComponent, MeshComponent>().each([this](const TransformComponent& transform, MeshComponent& mesh_component) {
             renderer->queue_job(gfx::RenderingJob(mesh_component.mesh, transform.transform_matrix));
         });
+
+        registry.view<TransformComponent, RotatingComponent>().each([this, &delta_time](TransformComponent& transform, RotatingComponent& rotating) {
+            transform.rotate(rotating.rate * delta_time, rotating.rotation_axis);
+        });
     }
 }
\ No newline at end of file