Add Module 3: Object-Oriented Programming and Ownership Semantics (#25)

add module 3: object-oriented programming and ownership semantics (#25)

---------

Signed-off-by: Evgenii Moiseenko <evg.moiseenko94@gmail.com>
Co-authored-by: Dmitrii Kotov <87141565+boruno@users.noreply.github.com>
Co-authored-by: Mikhail Oshukov <Mikhail.Oshukov@jetbrains.com>

.gitignore

@@ -9,3 +9,4 @@ sfml/*
 
 Makefile
 CMakeCache.txt
+.DS_Store

MemoryManagement/LinkedList/LinkedList/src/approaching.cpp

@@ -1,4 +1,4 @@
-#include "scene.hpp"
+#include "game.hpp"
 
 void approachingLoop(Circle player, Circle consumable[], bool concerned[], int size) {
     for (int i = 0; i < size; ++i) {

MemoryManagement/LinkedList/LinkedList/src/borders.cpp

@@ -1,4 +1,4 @@
-#include "scene.hpp"
+#include "game.hpp"
 
 Point2D adjustToBorders(Point2D position) {
     Point2D result = position;

MemoryManagement/LinkedList/LinkedList/src/collision.cpp

@@ -1,6 +1,6 @@
 #include <cmath>
 
-#include "scene.hpp"
+#include "game.hpp"
 
 float distance(Point2D a, Point2D b) {
     float dx = a.x - b.x;

MemoryManagement/LinkedList/LinkedList/src/direction.cpp

@@ -1,4 +1,4 @@
-#include "scene.hpp"
+#include "game.hpp"
 
 Point2D getDirection(Direction direction) {
     switch (direction) {

MemoryManagement/LinkedList/LinkedList/src/generate.cpp

@@ -1,4 +1,4 @@
-#include "scene.hpp"
+#include "game.hpp"
 
 #include <cstdlib>
 

MemoryManagement/LinkedList/LinkedList/src/loop.cpp

@@ -1,4 +1,4 @@
-#include "scene.hpp"
+#include "game.hpp"
 
 void collisionLoop(Circle player, Circle consumable[], bool consumed[], int size) {
     for (int i = 0; i < size; ++i) {

MemoryManagement/LinkedList/LinkedList/src/main.cpp

@@ -1,6 +1,6 @@
 #include <SFML/Graphics.hpp>
 
-#include "scene.hpp"
+#include "game.hpp"
 #include "dllist.hpp"
 
 const int MAX_CONSUMABLES_COUNT = 8;

MemoryManagement/LinkedList/LinkedList/src/point.cpp

@@ -1,4 +1,4 @@
-#include "scene.hpp"
+#include "game.hpp"
 
 Point2D add(Point2D a, Point2D b) {
     Point2D c = { 0, 0 };

MemoryManagement/LinkedList/LinkedList/task.md

@@ -55,7 +55,7 @@ void link(Node* cursor, Node* node);
 It should link together the `cursor` and `node` nodes, putting `node` right after `cursor`.
 Make sure to properly update the `next` and `prev` fields of all relevant nodes, 
 that is, the nodes pointed by the `cursor`, `cursor->next`, and `node` pointers. 
-You might assume that all nodes reachable from `cursor` through `next` and `prev`
+You might assume that all nodes which are reachable from `cursor` through `next` and `prev`
 are valid nodes and none of their `next` or `prev` pointers are null
 (we will see why this is true for our intended list implementation later).
 
@@ -91,7 +91,7 @@ struct List {
 For this scheme to work properly, we also have to initialize the 
 `next` and `prev` fields of the `sentry` node.
 We can make them both point to the `sentry` node. 
-Therefore, in our encoding, an empty list is modelled as 
+Therefore, in our encoding, an empty list is modeled as 
 a list consisting of a single sentinel node whose `next` and `prev` pointers form a cycle.
 Write code for the function `initList` implementing this idea
 (set the `data` field of the `sentry` node to `nullptr`):

MemoryManagement/MemoryLayout/Swap/task-info.yaml

@@ -2,11 +2,11 @@ type: edu
 files:
 - name: CMakeLists.txt
   visible: false
+- name: test/test.cpp
+  visible: false
 - name: src/task.cpp
   visible: true
   placeholders:
   - offset: 32
     length: 36
     placeholder_text: /* TODO */
-- name: test/test.cpp
-  visible: false

MemoryManagement/TypeCastsAndCStrings/CStringConcat/task-info.yaml

@@ -3,11 +3,11 @@ custom_name: C Style Strings Concatenation
 files:
 - name: CMakeLists.txt
   visible: false
-- name: test/test.cpp
-  visible: false
 - name: src/task.cpp
   visible: true
   placeholders:
   - offset: 92
     length: 201
     placeholder_text: return nullptr;
+- name: test/test.cpp
+  visible: false

MemoryManagement/TypeCastsAndCStrings/CStyle/task.md

@@ -8,7 +8,7 @@ However, in general, C is not a strict subset of C++, meaning that
 there are a lot of various [incompatibilities](https://en.wikipedia.org/wiki/Compatibility_of_C_and_C%2B%2B) 
 between these languages.
 Besides that, there are a lot of language features, idioms, and patterns that differ in C and C++.
-These difference give rise to the mentioned C and C++ styles of doing things.
+These differences give rise to the mentioned C and C++ styles of doing things.
 
 It is important to learn to read C-style code, even if you plan to follow purely the C++ style in the future.
 As of today, the C language has become a "cross-platform assembly language",

ObjectOrientedProgramming/ClassesAndObjects/CollisionsRevisited/CMakeLists.txt

@@ -0,0 +1,27 @@
+cmake_minimum_required(VERSION 3.25)
+
+project(ObjectOrientedProgramming-ClassesAndObjects-CollisionsRevisited)
+
+set(SRC
+        src/main.cpp
+        src/engine.cpp src/scenes.cpp src/textures.cpp
+        src/scene.cpp src/statscene.cpp src/dynscene.cpp
+        src/gobject.cpp src/gobjectlist.cpp src/cgobject.cpp
+        src/player.cpp src/consumable.cpp src/enemy.cpp
+        src/collision.cpp src/direction.cpp
+        src/rectangle.cpp src/point.cpp
+        src/operators.cpp src/utils.cpp
+)
+
+set(TEST
+        test/test.cpp)
+
+add_executable(${PROJECT_NAME}-run ${SRC})
+
+configure_test_target(${PROJECT_NAME}-test "${SRC}" ${TEST})
+
+prepare_sfml_framework_lesson_task(
+        "${CMAKE_CURRENT_SOURCE_DIR}/.."
+        ${PROJECT_NAME}-run
+        ${PROJECT_NAME}-test
+)

ObjectOrientedProgramming/ClassesAndObjects/CollisionsRevisited/src/cgobject.cpp

@@ -0,0 +1,47 @@
+#include "cgobject.hpp"
+
+#include "operators.hpp"
+
+CircleGameObject::CircleGameObject(Circle circle)
+    : circle(circle)
+    , status(GameObjectStatus::NORMAL)
+{}
+
+Point2D CircleGameObject::getPosition() const {
+    return circle.center;
+}
+
+void CircleGameObject::setPosition(Point2D position) {
+    circle.center = position;
+}
+
+GameObjectStatus CircleGameObject::getStatus() const {
+    return status;
+}
+
+void CircleGameObject::setStatus(GameObjectStatus newStatus) {
+    status = newStatus;
+}
+
+Circle CircleGameObject::getCircle() const {
+    return circle;
+}
+
+Rectangle CircleGameObject::getBoundingBox() const {
+    Point2D offset = { circle.radius, circle.radius };
+    Point2D p1 = circle.center - offset;
+    Point2D p2 = circle.center + offset;
+    return createRectangle(p1, p2);
+}
+
+void CircleGameObject::draw(sf::RenderWindow &window, TextureManager& textureManager) const {
+    const sf::Texture* texture = getTexture(textureManager);
+    if (texture == nullptr)
+        return;
+    sf::CircleShape shape;
+    shape.setPosition(circle.center.x, circle.center.y);
+    shape.setOrigin(circle.radius, circle.radius);
+    shape.setRadius(circle.radius);
+    shape.setTexture(texture);
+    window.draw(shape);
+}

ObjectOrientedProgramming/ClassesAndObjects/CollisionsRevisited/src/collision.cpp

@@ -0,0 +1,21 @@
+#include <cassert>
+
+#include "collision.hpp"
+#include "cgobject.hpp"
+#include "utils.hpp"
+
+CollisionInfo collisionInfo(const Circle& circle1, const Circle& circle2) {
+    CollisionInfo info;
+    info.distance = distance(circle1.center, circle2.center);
+    info.collide = (info.distance < circle1.radius + circle2.radius);
+    return info;
+}
+
+CollisionInfo collisionInfo(const GameObject& object1, const GameObject& object2) {
+    const CircleGameObject* circleObject1 = dynamic_cast<const CircleGameObject*>(&object1);
+    const CircleGameObject* circleObject2 = dynamic_cast<const CircleGameObject*>(&object2);
+    if (circleObject1 && circleObject2) {
+        return collisionInfo(circleObject1->getCircle(), circleObject2->getCircle());
+    }
+    assert(false);
+}

ObjectOrientedProgramming/ClassesAndObjects/CollisionsRevisited/src/consumable.cpp

@@ -0,0 +1,46 @@
+#include "consumable.hpp"
+
+#include "constants.hpp"
+
+ConsumableObject::ConsumableObject()
+    : CircleGameObject({ { CONSUMABLE_START_X, CONSUMABLE_START_Y }, CONSUMABLE_RADIUS })
+{}
+
+GameObjectKind ConsumableObject::getKind() const {
+    return GameObjectKind::CONSUMABLE;
+}
+
+Point2D ConsumableObject::getVelocity() const {
+    return { 0.0f, 0.0f };
+}
+
+void ConsumableObject::update(sf::Time delta) {
+    if (getStatus() != GameObjectStatus::DESTROYED) {
+        setStatus(GameObjectStatus::NORMAL);
+    }
+}
+
+void ConsumableObject::onCollision(const GameObject &object, const CollisionInfo &info) {
+    if (getStatus() == GameObjectStatus::DESTROYED || object.getKind() == GameObjectKind::CONSUMABLE) {
+        return;
+    }
+    if (info.collide) {
+        setStatus(GameObjectStatus::DESTROYED);
+        return;
+    }
+    if (info.distance < CONSUMABLE_WARNED_MULTIPLIER * getCircle().radius) {
+        setStatus(GameObjectStatus::WARNED);
+        return;
+    }
+}
+
+const sf::Texture* ConsumableObject::getTexture(TextureManager& textureManager) const {
+    switch (getStatus()) {
+        case GameObjectStatus::NORMAL:
+            return textureManager.getTexture(GameTextureID::STAR);
+        case GameObjectStatus::WARNED:
+            return textureManager.getTexture(GameTextureID::STAR_CONCERNED);
+        case GameObjectStatus::DESTROYED:
+            return nullptr;
+    }
+}

ObjectOrientedProgramming/ClassesAndObjects/CollisionsRevisited/src/direction.cpp

@@ -0,0 +1,16 @@
+#include "direction.hpp"
+
+Point2D getDirection(Direction direction) {
+    switch (direction) {
+        case North:
+            return {  0.0f, -1.0f };
+        case East:
+            return {  1.0f,  0.0f };
+        case South:
+            return {  0.0f,  1.0f };
+        case West:
+            return { -1.0f,  0.0f };
+        default:
+            return { 0.0f, 0.0f };
+    }
+}