CFrame - Streamlined Keyframing and Easing for C++

CFrame makes it a breeze to implement beautiful animations in your C++ UI/GUI application.

Note: CFrame is now a C++20 library, rather than C99. This was done to take advantage of templates, making the library much more intuitive, expressive, and maintainable.

Major Features

• Header only, C++20 library with no dependencies
• Dead-simple API with only 2 structs: Keyframe and Animation
• Implement keyframing and easing on almost any struct
• Flexible keyframing options
• Built in easing functions such as Quadratic, Sine, and more

Including in your project

Simply include cframe.hpp and define CFRAME_IMPLEMENTATION once somewhere in your project.

Basic Example

The following is basic.cpp in the examples folder. It uses CFrame to animate a Rectangle in raylib.

#include "raylib.h"

#define CFRAME_IMPLEMENTATION
#include "../cframe.hpp"

int main() {

    InitWindow(680, 400, "Basic Example");
    SetTargetFPS(60);

    // Create one (or more) keyframe
    std::vector<CF::Keyframe<Rectangle>> keyframes = {
        {
            .type = CF::TransformType::OFFSET,
            .transform = {280, 0, 0, 0}, // This will add 280 to Rectangle::x
        }
    };

    // Create an animation
    CF::Animation<Rectangle> rec({150, 150, 100, 100}, keyframes, CF::PlayMode::BOOMERANG_LOOP, CF::EasingFunction::CUBIC_IN_OUT);

    while(!WindowShouldClose()) {

        BeginDrawing();

            ClearBackground(LIGHTGRAY);
            // Use .get() to step the animation and return the animated struct
            DrawRectangleRec(rec.get(), BLUE);
   
        EndDrawing();
    }

    return 0;
}

The above example will produce the following.

Building the Examples

The examples are built with CMake and depend on raylib. They've been tested only on MacOS:

cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=1 -DCMAKE_BUILD_TYPE=DEBUG -S . -B build
cmake --build build