Further implement weapons and pickups

Inventory can now by cycled
Weapon Pickups are created infront of the spawn

rwengine/include/engine/GameObject.hpp

@@ -50,6 +50,7 @@ struct GameObject
 		Instance,
 		Character,
 		Vehicle,
+		Pickup,
 		Unknown
     };
 

rwengine/include/objects/CharacterObject.hpp

@@ -141,6 +141,10 @@ public:
 	void setActiveItem( int slot );
 	InventoryItem* getActiveItem();
 	void destroyItem( int slot );
+
+	void cycleInventory( bool up );
+
+	const std::map<int, InventoryItem*>& getInventory() const { return _inventory; }
 };
 
 #endif

rwengine/include/objects/ItemPickup.hpp

@@ -0,0 +1,22 @@
+#pragma once
+#ifndef _ITEMPICKUP_HPP_
+#define _ITEMPICKUP_HPP_
+#include <objects/PickupObject.hpp>
+#include <glm/glm.hpp>
+#include <data/WeaponData.hpp>
+
+/**
+ * @brief The ItemPickup class
+ * Inserts an item into a characters inventory on pickup.
+ */
+class ItemPickup : public PickupObject
+{
+	std::shared_ptr<WeaponData> _data;
+public:
+
+	ItemPickup(GameWorld* world, const glm::vec3& position, std::shared_ptr<WeaponData> weapon);
+
+	bool onCharacterTouch(CharacterObject* character);
+};
+
+#endif

rwengine/include/objects/PickupObject.hpp

@@ -0,0 +1,40 @@
+#pragma once
+#ifndef _PICKUPOBJECT_HPP_
+#define _PICKUPOBJECT_HPP_
+#include <engine/GameObject.hpp>
+#include <bullet/btBulletCollisionCommon.h>
+#include <BulletCollision/CollisionDispatch/btGhostObject.h>
+#include <glm/glm.hpp>
+
+class CharacterObject;
+
+/**
+ * @brief The PickupObject class
+ * Implements interface and base behaviour for pickups
+ */
+class PickupObject : public GameObject
+{
+	btPairCachingGhostObject* _ghost;
+	btSphereShape* _shape;
+	bool _enabled;
+	float _enableTimer;
+	int _modelID;
+public:
+
+	PickupObject(GameWorld* world, const glm::vec3& position, int modelID);
+
+	~PickupObject();
+
+	int getModelID() const { return _modelID; }
+
+	Type type() { return Pickup; }
+
+	void tick(float dt);
+
+	virtual bool onCharacterTouch(CharacterObject* character) = 0;
+
+	bool isEnabled() const { return _enabled; }
+	void setEnabled(bool enabled);
+};
+
+#endif

rwengine/include/render/GameRenderer.hpp

@@ -12,9 +12,12 @@ class Model;
 class ModelFrame;
 class GameWorld;
 class GameObject;
+
 class CharacterObject;
 class VehicleObject;
 class InstanceObject;
+class PickupObject;
+
 class Animator;
 class InventoryItem;
 
@@ -85,6 +88,7 @@ public:
 	void renderPedestrian(CharacterObject* pedestrian);
 	void renderVehicle(VehicleObject* vehicle);
 	void renderInstance(InstanceObject* instance);
+	void renderPickup(PickupObject* pickup);
 
 	void renderWheel(Model*, const glm::mat4& matrix, const std::string& name);
 

rwengine/src/objects/CharacterObject.cpp

@@ -80,7 +80,8 @@ void CharacterObject::createActor(const glm::vec3& size)
 		physCharacter->setVelocityForTimeInterval(btVector3(1.f, 1.f, 0.f), 1.f);
 		physCharacter->setGravity(engine->dynamicsWorld->getGravity().length());
 
-		engine->dynamicsWorld->addCollisionObject(physObject, btBroadphaseProxy::KinematicFilter, btBroadphaseProxy::StaticFilter);
+		engine->dynamicsWorld->addCollisionObject(physObject, btBroadphaseProxy::KinematicFilter,
+												  btBroadphaseProxy::StaticFilter|btBroadphaseProxy::SensorTrigger);
 		engine->dynamicsWorld->addAction(physCharacter);
 	}
 }
@@ -466,3 +467,37 @@ void CharacterObject::destroyItem(int slot)
 	_inventory[slot] = nullptr;
 }
 
+void CharacterObject::cycleInventory(bool up)
+{
+	if( up ) {
+		for(auto it	= _inventory.begin(); it != _inventory.end(); ++it) {
+			if( it->first < 0 ) continue;
+			if( it->first > _activeInventoryItem ) {
+				setActiveItem(it->first);
+				return;
+			}
+		}
+
+		// if there's no higher slot, set the first item.
+		auto next = _inventory.lower_bound(0);
+		if( next != _inventory.end() ) {
+			setActiveItem(next->first);
+		}
+	}
+	else {
+		for(auto it	= _inventory.rbegin(); it != _inventory.rend(); ++it) {
+			if( it->first < 0 ) break;
+			if( it->first < _activeInventoryItem ) {
+				setActiveItem(it->first);
+				return;
+			}
+		}
+
+		// if there's no lower slot, set the last item.
+		auto next = _inventory.rbegin();
+		if( next != _inventory.rend() ) {
+			setActiveItem(next->first);
+		}
+	}
+}
+

rwengine/src/objects/ItemPickup.cpp

@@ -0,0 +1,16 @@
+#include <objects/ItemPickup.hpp>
+#include <objects/CharacterObject.hpp>
+#include <engine/GameWorld.hpp>
+#include <items/WeaponItem.hpp>
+
+ItemPickup::ItemPickup(GameWorld *world, const glm::vec3 &position, std::shared_ptr<WeaponData> weapon)
+	: PickupObject(world, position, weapon->modelID), _data(weapon)
+{
+
+}
+
+bool ItemPickup::onCharacterTouch(CharacterObject *character)
+{
+	character->addToInventory(new WeaponItem(_data));
+	return true;
+}

rwengine/src/objects/PickupObject.cpp

@@ -0,0 +1,78 @@
+#include <objects/PickupObject.hpp>
+#include <objects/CharacterObject.hpp>
+#include <engine/GameWorld.hpp>
+
+PickupObject::PickupObject(GameWorld *world, const glm::vec3 &position, int modelID)
+	: GameObject(world, position, glm::quat(), nullptr),
+	  _ghost(nullptr), _shape(nullptr), _enabled(false), _modelID(modelID)
+{
+	btTransform tf;
+	tf.setIdentity();
+	tf.setOrigin(btVector3(position.x, position.y, position.z));
+
+	_ghost = new btPairCachingGhostObject;
+	_ghost->setUserPointer(this);
+	_ghost->setWorldTransform(tf);
+	_shape = new btSphereShape(0.5f);
+	_ghost->setCollisionShape(_shape);
+	_ghost->setCollisionFlags(btCollisionObject::CF_KINEMATIC_OBJECT|btCollisionObject::CF_NO_CONTACT_RESPONSE);
+
+	setEnabled(true);
+}
+
+PickupObject::~PickupObject()
+{
+	if(_ghost) {
+		setEnabled(false);
+		delete _ghost;
+		delete _shape;
+	}
+}
+
+void PickupObject::tick(float dt)
+{
+	if(! _enabled) {
+		_enableTimer -= dt;
+		if( _enableTimer <= 0.f ) {
+			setEnabled(true);
+		}
+	}
+
+	if(_enabled) {
+		// Sort out interactions with things that may or may not be players.
+		btManifoldArray manifoldArray;
+		btBroadphasePairArray& pairArray = _ghost->getOverlappingPairCache()->getOverlappingPairArray();
+		int numPairs = pairArray.size();
+
+		for (int i=0;i<numPairs;i++)
+		{
+			manifoldArray.clear();
+
+			const btBroadphasePair& pair = pairArray[i];
+			auto otherObject = static_cast<const btCollisionObject*>(
+						pair.m_pProxy0->m_clientObject == _ghost ? pair.m_pProxy1->m_clientObject : pair.m_pProxy0->m_clientObject);
+			if(otherObject->getUserPointer()) {
+				GameObject* object = static_cast<GameObject*>(otherObject->getUserPointer());
+				if(object->type() == Character) {
+					CharacterObject* character = static_cast<CharacterObject*>(object);
+					setEnabled( !onCharacterTouch(character) );
+					if( ! _enabled ) {
+						_enableTimer = 60.f;
+					}
+				}
+			}
+		}
+	}
+}
+
+void PickupObject::setEnabled(bool enabled)
+{
+	if( ! _enabled && enabled ) {
+		engine->dynamicsWorld->addCollisionObject(_ghost, btBroadphaseProxy::SensorTrigger);
+	}
+	else if( _enabled && ! enabled ) {
+		engine->dynamicsWorld->removeCollisionObject(_ghost);
+	}
+
+	_enabled = enabled;
+}

rwengine/src/render/GameRenderer.cpp

@@ -7,6 +7,8 @@
 #include <objects/CharacterObject.hpp>
 #include <objects/InstanceObject.hpp>
 #include <objects/VehicleObject.hpp>
+#include <objects/PickupObject.hpp>
+
 #include <ai/CharacterController.hpp>
 #include <data/ObjectData.hpp>
 #include <items/InventoryItem.hpp>
@@ -261,6 +263,9 @@ void GameRenderer::renderWorld(float alpha)
 		case GameObject::Instance:
 			renderInstance(static_cast<InstanceObject*>(object));
 			break;
+		case GameObject::Pickup:
+			renderPickup(static_cast<PickupObject*>(object));
+			break;
 		default: break;
 		}
 	}
@@ -526,6 +531,31 @@ void GameRenderer::renderInstance(InstanceObject *instance)
 	}
 }
 
+void GameRenderer::renderPickup(PickupObject *pickup)
+{
+	if( ! pickup->isEnabled() ) return;
+
+	glm::mat4 modelMatrix = glm::translate(glm::mat4(), pickup->getPosition());
+	modelMatrix = glm::rotate(modelMatrix, engine->gameTime, glm::vec3(0.f, 0.f, 1.f));
+
+	std::shared_ptr<ObjectData> odata = engine->objectTypes[pickup->getModelID()];
+	auto weapons = engine->gameData.models["weapons"];
+	if( weapons && weapons->model ) {
+		auto itemModel = weapons->model->findFrame(odata->modelName + "_l0");
+		auto matrix = glm::inverse(itemModel->getTransform());
+		if(itemModel) {
+			renderFrame(weapons->model, itemModel, modelMatrix * matrix, nullptr);
+		}
+		else {
+			std::cerr << "weapons.dff missing frame " << odata->modelName << std::endl;
+		}
+	}
+	else {
+		std::cerr << "weapons.dff not loaded" << std::endl;
+	}
+
+}
+
 void GameRenderer::renderWheel(Model* model, const glm::mat4 &matrix, const std::string& name)
 {
 	for (const ModelFrame* f : model->frames) 

rwgame/ingamestate.cpp

@@ -4,6 +4,7 @@
 #include "debugstate.hpp"
 #include <objects/CharacterObject.hpp>
 #include <objects/VehicleObject.hpp>
+#include <objects/ItemPickup.hpp>
 #include <render/Model.hpp>
 #include <items/WeaponItem.hpp>
 
@@ -15,9 +16,16 @@ IngameState::IngameState()
 
 	setPlayerCharacter( _playerCharacter );
 
-	auto bat = new WeaponItem(getWorld()->gameData.weaponData["ak47"]);
+	/*auto bat = new WeaponItem(getWorld()->gameData.weaponData["ak47"]);
 	_playerCharacter->addToInventory(bat);
-	_playerCharacter->setActiveItem(bat->getInventorySlot());
+	_playerCharacter->setActiveItem(bat->getInventorySlot());*/
+
+	getWorld()->objects.insert(new ItemPickup(getWorld(), {-1000.f, -980.f, 11.5f},
+											  getWorld()->gameData.weaponData["ak47"]));
+	getWorld()->objects.insert(new ItemPickup(getWorld(), {-1002.f, -980.f, 11.5f},
+											  getWorld()->gameData.weaponData["colt45"]));
+	getWorld()->objects.insert(new ItemPickup(getWorld(), {-1004.f, -980.f, 11.5f},
+											  getWorld()->gameData.weaponData["shotgun"]));
 
 	float j = 0;
 	auto carPos = glm::vec3( -1000.f, -1000.f, 12.f );
@@ -221,6 +229,9 @@ void IngameState::handleEvent(const sf::Event &event)
 		default: break;
 		}
 		break;
+	case sf::Event::MouseWheelMoved:
+		_playerCharacter->cycleInventory(event.mouseWheel.delta > 0);
+		break;
 	default: break;
 	}
 	State::handleEvent(event);

tests/test_pickup.cpp

@@ -0,0 +1,94 @@
+#include <boost/test/unit_test.hpp>
+#include <objects/PickupObject.hpp>
+#include <objects/ItemPickup.hpp>
+#include <items/InventoryItem.hpp>
+#include <data/WeaponData.hpp>
+#include <objects/CharacterObject.hpp>
+#include "test_globals.hpp"
+
+class TestPickup : public PickupObject
+{
+public:
+	bool picked_up = false;
+
+	TestPickup(GameWorld* engine, const glm::vec3& position)
+		: PickupObject(engine, position, 0)
+	{}
+
+	bool onCharacterTouch(CharacterObject *character) {
+		picked_up = true;
+		return true;
+	}
+};
+
+BOOST_AUTO_TEST_SUITE(PickupTests)
+
+BOOST_AUTO_TEST_CASE(test_pickup_interaction)
+{
+	{
+		auto character = Global::get().e->createPedestrian(1, { 30.1f, 0.f, 0.f });
+		BOOST_REQUIRE( character != nullptr );
+
+		TestPickup* p = new TestPickup(Global::get().e, { 30.f, 0.f, 0.f } );
+
+		Global::get().e->objects.insert(p);
+
+		BOOST_CHECK( ! p->picked_up );
+
+		Global::get().e->dynamicsWorld->stepSimulation(0.016f);
+		p->tick(0.f);
+
+		BOOST_CHECK( p->picked_up );
+
+		p->picked_up = false;
+
+		BOOST_CHECK( ! p->picked_up );
+
+		Global::get().e->dynamicsWorld->stepSimulation(0.016f);
+		p->tick(0.f);
+
+		BOOST_CHECK( ! p->picked_up );
+
+		Global::get().e->dynamicsWorld->stepSimulation(0.016f);
+		p->tick(60.5f);
+
+		BOOST_CHECK( p->picked_up );
+
+
+		Global::get().e->destroyObject(p);
+		Global::get().e->destroyObject(character);
+	}
+}
+
+BOOST_AUTO_TEST_CASE(test_item_pickup)
+{
+	{
+		auto character = Global::get().e->createPedestrian(1, { 30.1f, 0.f, 0.f });
+		BOOST_REQUIRE( character != nullptr );
+
+		auto item = Global::get().e->gameData.weaponData["ak47"];
+
+		ItemPickup* p = new ItemPickup(Global::get().e, { 30.f, 0.f, 0.f }, item );
+
+		Global::get().e->objects.insert(p);
+
+		// Check the characters inventory is empty.
+		BOOST_CHECK( character->getInventory().empty() );
+
+		Global::get().e->dynamicsWorld->stepSimulation(0.016f);
+		p->tick(0.f);
+
+		BOOST_CHECK( ! character->getInventory().empty() );
+
+		auto inventory = character->getInventory();
+		BOOST_CHECK( std::any_of( inventory.begin(), inventory.end(),
+								  [&](const std::pair<int, InventoryItem*>& i)
+		{ return i.second->getModelID() == item->modelID; }) );
+
+		Global::get().e->destroyObject(p);
+		Global::get().e->destroyObject(character);
+	}
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+