Circle Animation with ImGui

 Circle Animation with ImGui for C++

Youtube:

Source code:

void CircFunc()

{

    static int nc = 360;

    double radius = 300;

    static float mul = 1;

    ImGui::Begin("Settings");

    ImGui::InputInt("Number", &nc, 2, 1000);

    ImGui::InputFloat("Multiply", &mul, 0.01f, 1.0f, "%.3f");

    ImGui::SliderInt("Number_", &nc, 2, 1000);

    ImGui::SliderFloat("Multiply_", &mul, 0.0f, 100.0f);

    ImGui::End();

    ImGui::Begin("Canvas");

    ImVec2 window_pos = ImGui::GetWindowPos();

    ImVec2 window_size = ImGui::GetWindowSize();

    ImVec2 cent = ImVec2(window_pos.x + window_size.x * 0.5f, window_pos.y + window_size.y * 0.5f);

    ImDrawList* drawlist = ImGui::GetWindowDrawList();

    drawlist->AddCircle(cent, radius, IM_COL32(255, 255, 255, 255));

    double divang = PI2 / nc;

    for (int i=0;i<nc;i++)

    {

        double b = i * mul;

        double x1 = cent.x + cos(i * divang) * radius;

        double y1 = cent.y + sin(i * divang) * radius;

        double x2 = cent.x + cos(b * divang) * radius;

        double y2 = cent.y + sin(b * divang) * radius;

        drawlist->AddLine(ImVec2((float)x1, (float)y1), ImVec2((float)x2, (float)y2), IM_COL32(255, 255, 255, 255));

    }

    ImGui::End();

}