Game Objects

Common game object classes with built-in physics and rendering.

Header: #include <asw/modules/game.h>Namespace: asw::game

Physics

A simple physics component attached to game objects.

class Physics {
public:
  asw::Vec2<float> velocity;
  asw::Vec2<float> acceleration;
  float angular_velocity{0};
  float angular_acceleration{0};
};

GameObject

Base class for all game objects. Provides transform, physics, and lifecycle management.

class GameObject;

Fields

Field	Type	Default	Description
transform	asw::Quad<float>		Position and size
rotation	float	0	Rotation in radians
z_index	int	0	Draw order (higher = on top)
active	bool	true	Whether to update and draw
alpha	float	1.0	Opacity (0.0 - 1.0)
body	Physics		Physics component
alive	bool	true	Set to false to remove from scene

Virtual Methods

update

virtual void update(float dt);

Updates physics: applies acceleration to velocity, velocity to position, and angular acceleration/velocity to rotation. Override to add custom behavior (call GameObject::update(dt) to keep the physics).

draw

virtual void draw();

Override to render the object.

get_transform

const asw::Quad<float>& get_transform() const;

Returns a const reference to the transform.

Sprite

A GameObject that draws a texture. Inherits all GameObject fields.

class Sprite : public GameObject;

Methods

set_texture

void set_texture(const asw::Texture& texture, bool auto_size = true);

Set the sprite's texture. When auto_size is true, the transform size is automatically set to the texture dimensions.

Rendering automatically handles alpha and rotation.

Text

A GameObject that draws text. Inherits all GameObject fields.

class Text : public GameObject;

Methods

set_font

void set_font(const asw::Font& font);

Set the font to use for rendering.

set_text

void set_text(const std::string_view& text);

Set the text content.

set_color

void set_color(const asw::Color& color);

Set the text color.

set_justify

void set_justify(asw::TextJustify justify);

Set the text justification (Left, Center, or Right).

Example

// Create a sprite
auto player = std::make_shared<asw::game::Sprite>();
player->set_texture(asw::assets::load_texture("player.png"));
player->transform.position = {100.0f, 200.0f};
player->body.velocity = {50.0f, 0.0f};
player->z_index = 1;

// Create text
auto label = std::make_shared<asw::game::Text>();
label->set_font(asw::assets::load_font("font.ttf", 16));
label->set_text("Score: 0");
label->set_color(asw::color::white);
label->set_justify(asw::TextJustify::Center);
label->transform.position = {10.0f, 10.0f};

// Custom game object
class Enemy : public asw::game::GameObject {
public:
  void update(float dt) override {
    GameObject::update(dt);
    // custom AI logic
  }

  void draw() override {
    asw::draw::circle_fill(transform.position, 16.0f, asw::color::red);
  }
};