Function loop

deps/SDL2/test/testintersections.c:201–265

}

void
loop()
{
    int i;
    SDL_Event event;

    /* Check for events */
    while (SDL_PollEvent(&event)) {
        SDLTest_CommonEvent(state, &event, &done);
        switch (event.type) {
        case SDL_MOUSEBUTTONDOWN:
            mouse_begin_x = event.button.x;
            mouse_begin_y = event.button.y;
            break;
        case SDL_MOUSEBUTTONUP:
            if (event.button.button == 3)
                add_line(mouse_begin_x, mouse_begin_y, event.button.x,
                         event.button.y);
            if (event.button.button == 1)
                add_rect(mouse_begin_x, mouse_begin_y, event.button.x,
                         event.button.y);
            break;
        case SDL_KEYDOWN:
            switch (event.key.keysym.sym) {
            case 'l':
                if (event.key.keysym.mod & KMOD_SHIFT)
                    num_lines = 0;
                else
                    add_line(rand() % 640, rand() % 480, rand() % 640,
                             rand() % 480);
                break;
            case 'r':
                if (event.key.keysym.mod & KMOD_SHIFT)
                    num_rects = 0;
                else
                    add_rect(rand() % 640, rand() % 480, rand() % 640,
                             rand() % 480);
                break;
            }
            break;
        default:
            break;
        }
    }
    for (i = 0; i < state->num_windows; ++i) {
        SDL_Renderer *renderer = state->renderers[i];
        if (state->windows[i] == NULL)
            continue;
        SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
        SDL_RenderClear(renderer);

        DrawRects(renderer);
        DrawPoints(renderer);
        DrawRectRectIntersections(renderer);
        DrawLines(renderer);
        DrawRectLineIntersections(renderer);

        SDL_RenderPresent(renderer);