added physics system

2 files changed, 116 insertions, 0 deletions

diff --git a/src/test/CMakeLists.txt b/src/test/CMakeLists.txt
index 0d316d6..0e4eaed 100644
--- a/src/test/CMakeLists.txt
+++ b/src/test/CMakeLists.txt
@@ -1,5 +1,6 @@
 target_sources(test_main PUBLIC
 	dummy.cpp
 	# audio.cpp
+	PhysicsTest.cpp
 )
 
diff --git a/src/test/PhysicsTest.cpp b/src/test/PhysicsTest.cpp
new file mode 100644
index 0000000..5ad5d01
--- /dev/null
+++ b/src/test/PhysicsTest.cpp
@@ -0,0 +1,115 @@
+#include <gtest/gtest.h>
+#include <crepe/ComponentManager.h>
+#include <crepe/api/GameObject.h>
+#include <crepe/api/Rigidbody.h>
+#include <crepe/api/Transform.h>
+#include <crepe/system/PhysicsSystem.h>
+#include <crepe/api/Config.h>
+
+using namespace std;
+using namespace std::chrono_literals;
+using namespace crepe;
+
+class PhysicsTest : public ::testing::Test {
+protected:
+    GameObject* game_object;
+    PhysicsSystem physics_system;
+		void SetUp() override {
+			ComponentManager & mgr = ComponentManager::get_instance();
+			std::vector<std::reference_wrapper<Transform>> transforms = mgr.get_components_by_id<Transform>(0);
+			if (transforms.empty()) {
+				game_object = new GameObject(0,"","",Vector2{0,0},0,0);
+				game_object->add_component<Rigidbody>(Rigidbody::RigidbodyData{
+						.mass = 1,
+						.gravity_scale = 1,
+						.body_type = Rigidbody::BodyType::DYNAMIC,
+						.max_linear_velocity = Vector2{10,10},
+						.max_angular_velocity = 10,
+						.constraints = {0, 0},
+						.use_gravity = true,
+						.bounce = false
+				});
+			}
+			transforms = mgr.get_components_by_id<Transform>(0);
+			Transform& transform = transforms.front().get();
+			transform.position.x = 0.0;
+			transform.position.y = 0.0;
+			transform.rotation = 0.0;
+			std::vector<std::reference_wrapper<Rigidbody>> rigidbodies = mgr.get_components_by_id<Rigidbody>(0);
+			Rigidbody& rigidbody = rigidbodies.front().get();
+			rigidbody.data.angular_velocity = 0;
+			rigidbody.data.linear_velocity.x = 0;
+			rigidbody.data.linear_velocity.y = 0;
+    }
+};
+
+TEST_F(PhysicsTest, gravity) {
+	Config::get_instance().physics.gravity = 1;
+	ComponentManager & mgr = ComponentManager::get_instance();
+	std::vector<std::reference_wrapper<Transform>> transforms = mgr.get_components_by_id<Transform>(0);
+	const Transform& transform = transforms.front().get();
+	ASSERT_FALSE(transforms.empty());
+	EXPECT_EQ(transform.position.y, 0);
+	physics_system.update();
+	EXPECT_EQ(transform.position.y, 1);
+	physics_system.update();
+	EXPECT_EQ(transform.position.y, 3);
+}
+
+TEST_F(PhysicsTest, max_velocity) {
+	ComponentManager & mgr = ComponentManager::get_instance();
+	std::vector<std::reference_wrapper<Rigidbody>> rigidbodies = mgr.get_components_by_id<Rigidbody>(0);
+	Rigidbody& rigidbody = rigidbodies.front().get();
+	ASSERT_FALSE(rigidbodies.empty());
+	EXPECT_EQ(rigidbody.data.linear_velocity.y, 0);
+	rigidbody.add_force_linear({100,100});
+	rigidbody.add_force_angular(100);
+	physics_system.update();
+	EXPECT_EQ(rigidbody.data.linear_velocity.y, 10);
+	EXPECT_EQ(rigidbody.data.linear_velocity.x, 10);
+	EXPECT_EQ(rigidbody.data.angular_velocity, 10);
+	rigidbody.add_force_linear({-100,-100});
+	rigidbody.add_force_angular(-100);
+	physics_system.update();
+	EXPECT_EQ(rigidbody.data.linear_velocity.y, -10);
+	EXPECT_EQ(rigidbody.data.linear_velocity.x, -10);
+	EXPECT_EQ(rigidbody.data.angular_velocity, -10);
+}
+
+TEST_F(PhysicsTest, movement) {
+	Config::get_instance().physics.gravity = 0;
+	ComponentManager & mgr = ComponentManager::get_instance();
+	std::vector<std::reference_wrapper<Rigidbody>> rigidbodies = mgr.get_components_by_id<Rigidbody>(0);
+	Rigidbody& rigidbody = rigidbodies.front().get();
+	std::vector<std::reference_wrapper<Transform>> transforms = mgr.get_components_by_id<Transform>(0);
+	const Transform& transform = transforms.front().get();
+	ASSERT_FALSE(rigidbodies.empty());
+	ASSERT_FALSE(transforms.empty());
+	rigidbody.add_force_linear({1,1});
+	rigidbody.add_force_angular(1);
+	physics_system.update();
+	EXPECT_EQ(transform.position.x, 1);
+	EXPECT_EQ(transform.position.y, 1);
+	EXPECT_EQ(transform.rotation, 1);
+	rigidbody.data.constraints = {1,1,1};
+	EXPECT_EQ(transform.position.x, 1);
+	EXPECT_EQ(transform.position.y, 1);
+	EXPECT_EQ(transform.rotation, 1);
+	rigidbody.data.linear_damping.x = 0.5;
+	rigidbody.data.linear_damping.y = 0.5;
+	rigidbody.data.angular_damping = 0.5;
+	physics_system.update();
+	EXPECT_EQ(rigidbody.data.linear_velocity.x, 0.5);
+	EXPECT_EQ(rigidbody.data.linear_velocity.y, 0.5);
+	EXPECT_EQ(rigidbody.data.angular_velocity, 0.5);
+	rigidbody.data.constraints = {1,1,0};
+	rigidbody.data.angular_damping = 0;
+	rigidbody.data.max_angular_velocity = 1000;
+	rigidbody.data.angular_velocity = 360;
+	physics_system.update();
+	EXPECT_EQ(transform.rotation, 1);
+	rigidbody.data.angular_velocity = -360;
+	physics_system.update();
+	EXPECT_EQ(transform.rotation, 1);
+}
+