feat: added viewport transformation

src/core/assets/asset_db.cpp

@@ -31,6 +31,7 @@ void AssetDB::load(std::string asset_name) {
 void AssetDB::index_assets() {
     SDL_Log("Indexing assets");
     for(std::filesystem::directory_entry const &itr : std::filesystem::recursive_directory_iterator("resources")) {
+        SDL_Log("Indexing %s", itr.path().c_str());
         if(itr.is_directory())
             continue;
         else if(!itr.path().has_extension())

src/core/canvas_engine.cpp

@@ -99,6 +99,10 @@ AssetDB &CanvasEngine::get_assets() {
     return this->assets;
 }
 
+CollisionWorld &CanvasEngine::get_collision_world() {
+    return this->collision_world;
+}
+
 InputMap &CanvasEngine::get_input_map() {
     return this->input_map;
 }
@@ -132,7 +136,7 @@ void CanvasEngine::process_event(SDL_Event const &evt) {
 
 void CanvasEngine::tick(double delta_time) {
     this->level->propagate_tick(delta_time);
-    this->physics_world.check_collisions();
+    this->collision_world.check_collisions();
 }
 
 void CanvasEngine::draw(SDL_Renderer *render) {

src/core/canvas_engine.hpp

@@ -1,17 +1,17 @@
 #ifndef CANVAS_ENGINE_HPP
 #define CANVAS_ENGINE_HPP
 
+#include "assets/asset_db.hpp"
 #include "core/collision.hpp"
 #include "core/level.hpp"
-#include "node.hpp"
-#include "assets/asset_db.hpp"
 #include "input/input_map.hpp"
-#include <SDL2/SDL_stdinc.h>
-#include <ctime>
-#include <cassert>
+#include "node.hpp"
 #include <SDL2/SDL.h>
 #include <SDL2/SDL_events.h>
 #include <SDL2/SDL_render.h>
+#include <SDL2/SDL_stdinc.h>
+#include <cassert>
+#include <ctime>
 #include <memory>
 
 namespace ce {
@@ -22,7 +22,7 @@ private:
     SDL_Renderer *render{nullptr}; //!< primary application window's renderer
     SDL_Texture *render_target{nullptr};
     AssetDB assets{};
-    CollisionWorld physics_world{};
+    CollisionWorld collision_world{};
     InputMap input_map{}; //!< map of inputs to input callback objects
     std::unique_ptr<Level> level;
     Uint64 last_frame_start_time{}; //!< time at start of last frame
@@ -42,6 +42,7 @@ public:
     void request_close();
     void set_target_delta_time(double target);
     AssetDB &get_assets();
+    CollisionWorld &get_collision_world();
     InputMap &get_input_map();
     SDL_Renderer *get_render();
 private:

src/core/collidable_node.cpp

@@ -2,6 +2,12 @@
 #include "collision_shape.hpp"
 
 namespace ce {
+CollidableNode::CollidableNode(std::string const &name, CollisionMask layers, CollisionMask mask)
+: ce::Node2D(name) {
+    this->layers = layers;
+    this->mask = mask;
+}
+
 void CollidableNode::_tick(double const &delta) {
     // find nodes that were overlapping last frame but not this frame
     std::map<CollidableNode*, unsigned>::iterator iterator{this->overlapped_nodes.begin()};
@@ -23,4 +29,20 @@ void CollidableNode::add_overlap(CollisionShape *shape, CollisionShape *other_sh
     this->shape_overlaps.insert(other_shape);
     ++this->overlapped_nodes[other_shape->get_owner()];
 }
+
+void CollidableNode::set_mask(CollisionMask mask) {
+    this->mask = mask;
+}
+
+CollisionMask CollidableNode::get_mask() const {
+    return this->mask;
+}
+
+void CollidableNode::set_layers(CollisionMask layers) {
+    this->layers = layers;
+}
+
+CollisionMask CollidableNode::get_layers() const {
+    return this->layers;
+}
 }

src/core/collidable_node.hpp

@@ -7,18 +7,27 @@
 #include <map>
 
 namespace ce {
+typedef uint64_t CollisionMask;
 class CollisionShape;
 
 class CollidableNode : public Node2D {
     std::set<CollisionShape*> shape_overlaps{};
     std::map<CollidableNode*, unsigned> overlapped_nodes{};
+    CollisionMask mask{~0x0u /* all layers by default */};
+    CollisionMask layers{0x1u /* only the first layer is enabled by default */};
 public:
     // collision(local_shape, other_node, other_shape)
     Signal<CollisionShape*, CollidableNode*, CollisionShape*> overlap_enter{};
     Signal<CollidableNode*> overlap_exit{};
 public:
+    CollidableNode(std::string const &name, CollisionMask layers, CollisionMask mask);
     virtual void _tick(double const &delta) override;
     void add_overlap(CollisionShape *shape, CollisionShape *other);
+
+    void set_mask(CollisionMask mask);
+    CollisionMask get_mask() const;
+    void set_layers(CollisionMask layers);
+    CollisionMask get_layers() const;
 };
 };
 

src/core/collision_shape.cpp

@@ -1,5 +1,6 @@
 #include "collision_shape.hpp"
 #include "collidable_node.hpp"
+#include "core/canvas_engine.hpp"
 #include <SDL2/SDL_log.h>
 #include <algorithm>
 
@@ -24,14 +25,17 @@ Shape Shape::make_box(float h_extent, float v_extent) {
 }
 
 CollisionShape::CollisionShape(std::string const &name, Node *owner, Shape shape)
-: Node2D(name) {
+: Node2D(name)
+, world{CanvasEngine::get_singleton()->get_collision_world()} {
     this->shape = shape;
 }
 
-void CollisionShape::_added(Node *parent) {
+void CollisionShape::_added() {
+    Node *parent{this->get_parent()};
     while(parent != nullptr) {
         if(CollidableNode *as_collidable{dynamic_cast<CollidableNode*>(parent)}) {
             this->owner = as_collidable;
+            this->register_with_world();
             return;
         }
     }
@@ -39,13 +43,20 @@ void CollisionShape::_added(Node *parent) {
     #ifdef DEBUG
         abort();
     #endif
+    if(this->is_registered)
+        this->deregister_with_world();
+}
+
+void CollisionShape::_removed() {
+    if(this->is_registered)
+        this->deregister_with_world();
 }
 
 bool CollisionShape::can_collide(CollisionShape const *lhs, CollisionShape const *rhs) {
     return lhs->owner != nullptr && rhs->owner != nullptr
         && lhs->owner != rhs->owner
-        && ((lhs->mask & rhs->layers) != 0x0u
-            || (rhs->mask & lhs->layers) != 0x0u);
+        && ((lhs->get_mask() & rhs->get_layers()) != 0x0u
+            || (rhs->get_mask() & lhs->get_layers()) != 0x0u);
 }
 
 bool CollisionShape::shapes_overlap(CollisionShape const *lhs, CollisionShape const *rhs) {
@@ -110,19 +121,21 @@ Shape const &CollisionShape::get_shape() const {
     return this->shape;
 }
 
-void CollisionShape::set_mask(CollisionMask mask) {
-    this->mask = mask;
+CollisionMask CollisionShape::get_layers() const {
+    return this->owner ? this->owner->get_layers() : 0x0u;
 }
 
 CollisionMask CollisionShape::get_mask() const {
-    return this->mask;
+    return this->owner ? this->owner->get_mask() : 0x0u;
 }
 
-void CollisionShape::set_layers(CollisionMask layers) {
-    this->layers = layers;
+void CollisionShape::register_with_world() {
+    this->world.add_collision_shape(this);
+    this->is_registered = true;
 }
 
-CollisionMask CollisionShape::get_layers() const {
-    return this->layers;
+void CollisionShape::deregister_with_world() {
+    this->world.remove_collision_shape(this);
+    this->is_registered = false;
 }
 }

src/core/collision_shape.hpp

@@ -1,13 +1,12 @@
 #ifndef COLLISION_SHAPE_HPP
 #define COLLISION_SHAPE_HPP
 
-#include "core/math/transform.hpp"
+#include "collidable_node.hpp"
+#include "math/transform.hpp"
 #include "node2d.hpp"
 
 namespace ce {
-class CollidableNode;
 class CollisionWorld;
-typedef uint64_t CollisionMask;
 
 struct ShapeCircle { float radius; };
 struct ShapeAABB { float h_extent, v_extent; };
@@ -27,13 +26,13 @@ struct Shape {
 class CollisionShape : public Node2D {
     CollidableNode *owner{nullptr};
     Shape shape{.shape=Shape::CIRCLE, .circle={.radius=1.f}};
-    CollisionWorld *world{nullptr};
-    CollisionMask mask{~0x0u /* all layers by default */};
-    CollisionMask layers{0x1u /* only the first layer is enabled by default */};
+    CollisionWorld &world;
+    bool is_registered{false};
 public:
     CollisionShape(std::string const &name, Node *owner, Shape shape);
 
-    virtual void _added(Node *parent) override;
+    virtual void _added() override;
+    virtual void _removed() override;
 
     static bool can_collide(CollisionShape const *lhs, CollisionShape const *rhs);
     static bool shapes_overlap(CollisionShape const *lhs, CollisionShape const *rhs);
@@ -44,10 +43,11 @@ public:
     CollidableNode *get_owner() const;
     void set_shape(Shape const &shape);
     Shape const &get_shape() const;
-    void set_mask(CollisionMask mask);
-    CollisionMask get_mask() const;
-    void set_layers(CollisionMask layers);
     CollisionMask get_layers() const;
+    CollisionMask get_mask() const;
+private:
+    void register_with_world();
+    void deregister_with_world();
 };
 }
 

src/core/level.cpp

@@ -1,12 +1,32 @@
 #include "level.hpp"
+#include "core/math/transform.hpp"
+#include <SDL2/SDL_render.h>
+#include <SDL2/SDL.h>
+#include <cmath>
 
 namespace ce {
+void Level::deinstantiate() {
+    this->root.reset();
+}
+
 void Level::propagate_tick(double const &delta_time) {
     this->root->propagate_tick(delta_time);
 }
 
 void Level::propagate_draw(SDL_Renderer *render) {
-    this->root->propagate_draw(render);
+    int w, h;
+    SDL_Window *window{SDL_RenderGetWindow(render)};
+    SDL_GetWindowSize(window, &w, &h);
+    ce::Transform const screen_transform{
+        .position = ce::Vecf::ZERO,
+        .rotation = 0.f,
+        .scale = ce::Vecf::ONE * float(w),
+    };
+    float const ratio{float(h)/float(w)};
+    this->root->propagate_draw(render, Transform().translated({
+        0.5f / this->view_transform.scale.x,
+        0.5f / this->view_transform.scale.y * ratio
+    }) * this->view_transform * screen_transform);
 }
 
 Node *Level::get_root() {

src/core/level.hpp

@@ -7,14 +7,22 @@ namespace ce {
 class Level {
 protected:
     Node::OwnedPtr root{nullptr};
+    ce::Transform view_transform{
+        .position = ce::Vecf::ZERO,
+        .rotation = 0.f,
+        .scale = {1.f/10.f, 1.f/10.f},
+    };
 public:
     virtual ~Level() = default;
     virtual void instantiate() = 0;
+    void deinstantiate();
     void propagate_tick(double const &delta_time);
     void propagate_draw(SDL_Renderer *render);
 
     Node *get_root();
     bool is_instantiated() const;
+    void set_view_transform(ce::Transform transform);
+    ce::Transform get_view_transform() const;
 protected:
     Node::OwnedPtr &get_owned_root();
 };

src/core/math/transform.cpp

@@ -14,6 +14,24 @@ void Transform::scale_by(Vecf const &factors) {
     this->scale.scale(factors);
 }
 
+Transform Transform::translated(Vecf const &translation) const {
+    Transform out{*this};
+    out.translate_by(translation);
+    return out;
+}
+
+Transform Transform::rotated(float rotation) const {
+    Transform out{*this};
+    out.rotate_by(rotation);
+    return out;
+}
+
+Transform Transform::scaled(Vecf const &factors) const {
+    Transform out{*this};
+    out.scale_by(factors);
+    return out;
+}
+
 Vecf Transform::right() const {
     return Vecf::RIGHT.rotated(this->rotation);
 }
@@ -24,7 +42,7 @@ Vecf Transform::up() const {
 
 Transform operator *(Transform const &lhs, Transform const &rhs) {
     Transform t{
-        .position = rhs.position + lhs.position.rotated(rhs.rotation),
+        .position = rhs.position + lhs.position.rotated(rhs.rotation).scaled(rhs.scale),
         .rotation = rhs.rotation + lhs.rotation,
         .scale = lhs.scale.scaled(rhs.scale)
     };
@@ -33,9 +51,7 @@ Transform operator *(Transform const &lhs, Transform const &rhs) {
 }
 
 Transform &operator *=(Transform &lhs, Transform const &rhs) {
-    lhs.position += lhs.position.rotated(rhs.rotation);
-    lhs.rotation += rhs.rotation;
-    lhs.scale.scale(rhs.scale);
+    lhs = lhs * rhs;
     assert(lhs.scale.x != 0.f || lhs.scale.y != 0.f); // !!!
     return lhs;
 }

src/core/math/transform.hpp

@@ -8,9 +8,13 @@ struct Transform {
     Vecf position{0.f, 0.f};
     double rotation{0.0};
     Vecf scale{1.f, 1.f};
+
     void translate_by(Vecf const &translation);
     void rotate_by(double rotation);
     void scale_by(Vecf const &factors);
+    Transform translated(Vecf const &translation) const;
+    Transform rotated(float rotation) const;
+    Transform scaled(Vecf const &factors) const;
 
     Vecf right() const;
     Vecf up() const;

src/core/math/vector.cpp

@@ -80,9 +80,12 @@ void Vecf::scale(Vecf const &factors) {
 }
 
 Vecf Vecf::scaled(Vecf const &factors) const {
-    return Vecf(this->x * factors.x, this->y * factors.y);
+    return Vecf{this->x * factors.x, this->y * factors.y};
 }
 
 Vecf const Vecf::RIGHT{1.f, 0.f};
 Vecf const Vecf::UP{0.f, 1.f};
+Vecf const Vecf::ONE{1.f, 1.f};
+Vecf const Vecf::ZERO{0.f, 0.f};
+Vecf const Vecf::POSITIVE_INFINITY{INFINITY, INFINITY};
 }

src/core/math/vector.hpp

@@ -45,6 +45,9 @@ struct Vecf {
 
     static Vecf const RIGHT;
     static Vecf const UP;
+    static Vecf const ONE;
+    static Vecf const POSITIVE_INFINITY;
+    static Vecf const ZERO;
 };
 
 static inline

src/core/node.cpp

@@ -1,6 +1,7 @@
 #include "node.hpp"
 #include <SDL2/SDL_assert.h>
 #include <algorithm>
+#include <cassert>
 #include <utility>
 #include <vector>
 
@@ -16,7 +17,7 @@ void Node::add_child(Node::OwnedPtr &child) {
     Node *added{this->children.insert({child->get_name(), std::move(child)}).first->second.get()};
     added->parent = this;
     this->child_added.invoke(added);
-    added->_added(this);
+    added->propagate_added();
 }
 // specialize to skip dynamic_cast
 template <> Node *Node::get_child<Node>(std::string const &name) {
@@ -68,6 +69,19 @@ bool Node::is_ticking() const {
     return this->tick;
 }
 
+ce::Level *Node::get_level() const {
+    return this->level;
+}
+
+void Node::set_level(ce::Level *level) {
+    // parent level needs to match
+    assert(this->parent == nullptr || this->parent->get_level() == level);
+    this->level = level;
+    for(std::pair<std::string const, std::unique_ptr<ce::Node>> &pair : this->children) {
+        pair.second->set_level(level);
+    }
+}
+
 std::optional<Node::OwnedPtr> Node::remove_child(Node *node) {
     if(this != node->get_parent())
         return std::nullopt;
@@ -84,7 +98,7 @@ std::optional<Node::OwnedPtr> Node::remove_child(Node *node) {
         Node::OwnedPtr owned{std::move(child->second)};
         this->children.erase(child);
         // notify both former child and any listeners that the child has been removed
-        owned->_removed();
+        owned->propagate_removed();
         this->child_removed.invoke(child->second.get());
         // return optional containing owned pointer to former child
         return std::optional(std::move(owned));
@@ -117,18 +131,24 @@ void Node::propagate_post_tick() {
         pair.second->propagate_post_tick();
 }
 
+void Node::propagate_added() {
+    this->_added();
+    for(std::pair<std::string const, Node::OwnedPtr> &pair : this->children)
+        pair.second->propagate_added();
+}
+
 void Node::propagate_removed() {
     for(std::pair<std::string const, Node::OwnedPtr> &pair : this->children)
         pair.second->propagate_removed();
     this->_removed();
 }
 
-void Node::propagate_draw(SDL_Renderer *render) {
+void Node::propagate_draw(SDL_Renderer *render, ce::Transform const &view_transform) {
     this->_update_transform();
     if(this->visible) {
-        this->_draw(render);
+        this->_draw(render, view_transform);
         for(std::pair<std::string const, Node::OwnedPtr> &pair : this->children)
-            pair.second->propagate_draw(render);
+            pair.second->propagate_draw(render, view_transform);
     }
 }
 

src/core/node.hpp

@@ -1,14 +1,17 @@
 #ifndef CANVAS_NODE_HPP
 #define CANVAS_NODE_HPP
 
+#include "core/math/transform.hpp"
 #include "core/signal.hpp"
-#include <memory>
 #include <map>
+#include <memory>
 #include <optional>
 #include <string>
 struct SDL_Renderer;
 
 namespace ce {
+class Level;
+
 class Node {
 public:
 friend class Level;
@@ -22,6 +25,7 @@ private:
     ChildrenMap children{};
     bool visible{true};
     bool tick{true};
+    ce::Level *level{nullptr};
 public:
     Signal<> destroyed{}; //!< Signal invoked by the destructor
     Signal<Node*> child_removed{}; //!< Signal invoked when a child is removed.
@@ -30,11 +34,11 @@ public:
     Node(std::string name);
     virtual ~Node();
 protected:
-    virtual void _added(Node *parent [[maybe_unused]]) {} //!< called the moment after the object is added as a child to another node
+    virtual void _added() {} //!< called the moment after the object is added as a child to another node
     virtual void _first_tick() {} //!< called the first frame this object is active
     virtual void _tick(double const &delta_time [[maybe_unused]]) {} //!< called every frame
     virtual void _removed() {} //!< called the moment before the object is removed as a child to another node
-    virtual void _draw(SDL_Renderer *render [[maybe_unused]]) {}
+    virtual void _draw(SDL_Renderer *render [[maybe_unused]], ce::Transform const &view_transform [[maybe_unused]]) {}
     virtual void _update_transform() {}
 public:
     template <class TNode> TNode *get_child(std::string const &name); //!< get a non-owning pointer to a child
@@ -50,18 +54,22 @@ public:
     bool is_visible() const;
     void set_tick(bool value);
     bool is_ticking() const;
+    ce::Level *get_level() const;
 private:
+    void set_level(ce::Level *level);
     std::optional<Node::OwnedPtr> remove_child(Node *child); //!< remove a child, the caller now owns the pointer
     void propagate_tick(double const &delta_time);
     void propagate_post_tick();
+    void propagate_added();
     void propagate_removed();
-    void propagate_draw(SDL_Renderer *render);
+    void propagate_draw(SDL_Renderer *render, ce::Transform const &view_transform);
     bool rename_child(std::string const &old_name, std::string const &new_name);
 };
 
 template <class TNode> TNode *Node::get_child(std::string const &name) {
     return children.contains(name) ? dynamic_cast<TNode*>(children.at(name).get()) : nullptr;
 }
+
 template <class TNode, typename... Args> TNode *Node::create_child(Args... cargs) {
     OwnedPtr owned{std::make_unique<TNode>(cargs...)};
     TNode *referenced{dynamic_cast<TNode*>(owned.get())};

src/core/node2d.cpp

@@ -4,8 +4,8 @@
 namespace ce {
 Node2D::Node2D(std::string name) : Node(name) {}
 
-void Node2D::_added(Node *parent) {
-    this->parent_node2d = dynamic_cast<Node2D*>(parent);
+void Node2D::_added() {
+    this->parent_node2d = dynamic_cast<Node2D*>(this->get_parent());
 }
 
 void Node2D::_update_transform() {

src/core/node2d.hpp

@@ -11,7 +11,7 @@ class Node2D : public Node {
     Node2D *parent_node2d{nullptr};
 public:
     Node2D(std::string name);
-    virtual void _added(Node *parent) override;
+    virtual void _added() override;
     Node2D *get_parent_node2d() const;
     virtual void _update_transform() override;
     void set_transform(Transform const &transform);

src/core/sprite.cpp

@@ -2,16 +2,18 @@
 #include "core/canvas_engine.hpp"
 #include "core/math/transform.hpp"
 #include <SDL2/SDL_render.h>
+#include <cassert>
 #include <cmath>
 
 namespace ce {
 Sprite::Sprite(std::string name, std::string texture)
 : Node2D(name) {
-    std::optional<std::shared_ptr<Texture>> asset = CanvasEngine::get_singleton()->get_assets().get_asset<Texture>(texture);
+    std::optional<std::shared_ptr<Texture>> asset{CanvasEngine::get_singleton()->get_assets().get_asset<Texture>(texture)};
+    if(asset.has_value())
         this->texture = asset.value();
 }
 
-void Sprite::_draw(SDL_Renderer *render) {
+void Sprite::_draw(SDL_Renderer *render, ce::Transform const &view_transform) {
     if(this->texture == nullptr) {
         SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "No texture assigned");
         this->set_visible(false);
@@ -19,9 +21,10 @@ void Sprite::_draw(SDL_Renderer *render) {
     }
     int w, h;
     SDL_QueryTexture(this->texture->get(), NULL, NULL, &w, &h);
-    Transform transform{this->get_global_transform()};
+    Transform transform{this->get_global_transform() * view_transform};
     assert(transform.scale.x != 0 && transform.scale.y != 0); // !!!
-    float fw{w * transform.scale.x}, fh{h * transform.scale.y};
+    float fw{transform.scale.x * (w > h ? float(w) / float(h) : 1.f)};
+    float fh{transform.scale.y * (w < h ? float(h) / float(w) : 1.f)};
     assert(fw != 0.f && fh != 0.f);
     //float fw(w), fh(h);
     SDL_Rect src{0, 0, w, h};

src/core/sprite.hpp

@@ -9,7 +9,7 @@ class Sprite : public Node2D {
     std::shared_ptr<Texture> texture{nullptr};
 public:
     Sprite(std::string name, std::string texture);
-    virtual void _draw(SDL_Renderer *render) override;
+    virtual void _draw(SDL_Renderer *render, ce::Transform const &view_transform) override;
 };
 }
 

src/level_1.cpp

@@ -1,10 +1,15 @@
 #include "level_1.hpp"
 #include "core/node.hpp"
-#include "test_node.hpp"
+#include "core/node2d.hpp"
+#include "core/sprite.hpp"
+#include "player.hpp"
 
 void Level1::instantiate() {
-    ce::Node::OwnedPtr &root_ptr{this->get_owned_root()};
-    root_ptr.reset(new ce::Node("root"));
-    ce::Node::OwnedPtr node{std::make_unique<TestNode>()};
-    root->add_child(node);
+    root.reset(new ce::Node2D("root"));
+    root->create_child<ce::Sprite>("background", "background")->set_global_transform({
+        .position = ce::Vecf::ZERO,
+        .rotation = 0.f,
+        .scale = ce::Vecf::ONE * 10.f
+    });
+    root->create_child<Player>();
 }

src/main.cpp

@@ -1,8 +1,9 @@
 #include "core/canvas_engine.hpp"
 #include "level_1.hpp"
 
+ce::CanvasEngine engine{};
+
 int main(int argc [[maybe_unused]], char* argv [[maybe_unused]][]) {
-    ce::CanvasEngine engine{};
     std::unique_ptr<ce::Level> level{std::make_unique<Level1>()};
     engine.run(level);
 }

src/player.cpp

@@ -0,0 +1,16 @@
+#include "player.hpp"
+#include "core/collidable_node.hpp"
+#include "core/collision_shape.hpp"
+#include "core/math/transform.hpp"
+#include "core/sprite.hpp"
+
+Player::Player()
+: ce::CollidableNode("player", 0x1u, 0x1u) {
+    this->sprite = this->create_child<ce::Sprite>("bike", "bike");
+    this->shape = this->create_child<ce::CollisionShape>("PlayerShape", this, ce::Shape::make_box(5.f, 10.f));
+    ce::Transform trans{this->get_global_transform()};
+    this->set_global_transform(trans);
+}
+
+void Player::_tick(double const &delta) {
+}

src/player.hpp

@@ -0,0 +1,19 @@
+#ifndef PLAYER_HPP
+#define PLAYER_HPP
+
+#include "core/collidable_node.hpp"
+
+namespace ce {
+class CollisionShape;
+class Sprite;
+};
+
+class Player : public ce::CollidableNode {
+    ce::CollisionShape *shape{nullptr};
+    ce::Sprite *sprite{nullptr};
+public:
+    Player();
+    virtual void _tick(double const &delta) override;
+};
+
+#endif // !PLAYER_HPP

src/test_node.cpp

@@ -5,7 +5,7 @@
 #include <cmath>
 
 TestNode::TestNode()
-: ce::Node2D("TestNode") {
+: ce::CollidableNode("TestNode", 0x1u, 0x1u) {
     this->sprite = this->create_child<ce::Sprite>("neocat", "neocat");
 }
 
@@ -24,8 +24,7 @@ void TestNode::_tick(double const &delta) {
     this->set_transform(trans);
 }
 
-void TestNode::_draw(SDL_Renderer *render) {
-    ce::Node2D::_draw(render);
+void TestNode::_draw(SDL_Renderer *render, ce::Transform const &view_transform) {
     ce::Transform trans{this->get_global_transform()};
     SDL_SetRenderDrawColor(render, 255, 255, 255, 255);
     SDL_FRect rect{trans.position.x-101.f, trans.position.y-101.f, 202.f, 202.f};

src/test_node.hpp

@@ -1,17 +1,19 @@
 #ifndef TEST_NODE_HPP
 #define TEST_NODE_HPP
 
-#include "core/node2d.hpp"
+#include "core/collidable_node.hpp"
+#include "core/collision_shape.hpp"
 #include "core/sprite.hpp"
 
-class TestNode : public ce::Node2D {
+class TestNode : public ce::CollidableNode {
 private:
     ce::Sprite *sprite{nullptr};
+    ce::CollisionShape *shape{nullptr};
 public:
     TestNode();
     virtual void _first_tick() override;
     virtual void _tick(double const &delta) override;
-    virtual void _draw(SDL_Renderer *render) override;
+    virtual void _draw(SDL_Renderer *render, ce::Transform const &view_transform) override;
 };
 
 #endif // !TEST_NODE_HPP