C++ Vector2i类代码示例

void FlyingModeManipulator::dragMiddle(
        const Vector2i& to,
        const Vector2i& from )
{
    Viewport& viewport = _window.getViewPort();
    const float x = ( to.x() - from.x( )) * _window.getMotionSpeed();
    const float y = ( to.y() - from.y( )) * _window.getMotionSpeed();
    viewport.translate( Vector3f( x, y , 0.f ), true );
}

void FlyingModeManipulator::dragLeft(
        const Vector2i& to,
        const Vector2i& from )
{
    const float du = ( to.x() - from.x( )) * _window.getRotateSpeed();
    const float dv = ( to.y() - from.y( )) * _window.getRotateSpeed();
    Viewport& viewport = _window.getViewPort();
    viewport.rotate( viewport.getPosition(), du, dv, true );
}

void FlyingModeManipulator::dragRight(
        const Vector2i& to,
        const Vector2i& from )
{
    const float fwd = -( to.y() - from.y( )) * _window.getMotionSpeed();
    Viewport& viewport = _window.getViewPort();
    const Vector3f dir( 0.f, 0.f , 1.f );
    viewport.translate( dir*fwd, false );
}

bool Font::FontTexture::findEmpty(const Vector2i& size, Vector2i& cursor_out)
{
	if(size.x() >= textureSize.x() || size.y() >= textureSize.y())
		return false;

	if(writePos.x() + size.x() >= textureSize.x() &&
		writePos.y() + rowHeight + size.y() + 1 < textureSize.y())
	{
		// row full, but it should fit on the next row
		// move cursor to next row
		writePos = Vector2i(0, writePos.y() + rowHeight + 1); // leave 1px of space between glyphs
		rowHeight = 0;
	}

	if(writePos.x() + size.x() >= textureSize.x() ||
		writePos.y() + size.y() >= textureSize.y())
	{
		// nope, still won't fit
		return false;
	}

	cursor_out = writePos;
	writePos[0] += size.x() + 1; // leave 1px of space between glyphs

	if(size.y() > rowHeight)
		rowHeight = size.y();

	return true;
}

Vector2i Window::preferredSize(NVGcontext *ctx) const {
    Vector2i result = Widget::preferredSize(ctx);

    nvgFontSize(ctx, 18.0f);
    nvgFontFace(ctx, "sans-bold");
    float bounds[4];
    nvgTextBounds(ctx, 0, 0, mTitle.c_str(), nullptr, bounds);

    return result.cwiseMax(Vector2i(
        bounds[2]-bounds[0] + 20, bounds[3]-bounds[1]
    ));
}

void AbstractTexture::storageImplementationDefault(GLenum target, GLsizei levels, AbstractTexture::InternalFormat internalFormat, const Vector2i& size) {
    bindInternal();
    /** @todo Re-enable when extension wrangler is available for ES2 */
    #ifndef MAGNUM_TARGET_GLES2
    glTexStorage2D(target, levels, GLenum(internalFormat), size.x(), size.y());
    #else
    //glTexStorage2DEXT(target, levels, GLenum(internalFormat), size.x(), size.y());
    static_cast<void>(target);
    static_cast<void>(levels);
    static_cast<void>(internalFormat);
    static_cast<void>(size);
    #endif
}

template<UnsignedInt dimensions, class T> typename DimensionTraits<dimensions, T>::MatrixType aspectRatioFix(AspectRatioPolicy aspectRatioPolicy, const Math::Vector2<T>& projectionScale, const Vector2i& viewport) {
    /* Don't divide by zero / don't preserve anything */
    if(projectionScale.x() == 0 || projectionScale.y() == 0 || viewport.x() == 0 || viewport.y() == 0 || aspectRatioPolicy == AspectRatioPolicy::NotPreserved)
        return {};

    Math::Vector2<T> relativeAspectRatio = Math::Vector2<T>(viewport)*projectionScale;

    /* Extend on larger side = scale larger side down
       Clip on smaller side = scale smaller side up */
    return Camera<dimensions, T>::aspectRatioScale(
               (relativeAspectRatio.x() > relativeAspectRatio.y()) == (aspectRatioPolicy == AspectRatioPolicy::Extend) ?
               Vector2(relativeAspectRatio.y()/relativeAspectRatio.x(), T(1.0)) :
               Vector2(T(1.0), relativeAspectRatio.x()/relativeAspectRatio.y()));
}

template<UnsignedInt dimensions, class T> MatrixTypeFor<dimensions, T> aspectRatioFix(AspectRatioPolicy aspectRatioPolicy, const Math::Vector2<T>& projectionScale, const Vector2i& viewport) {
    /* Don't divide by zero / don't preserve anything */
    if(projectionScale.x() == 0 || projectionScale.y() == 0 || viewport.x() == 0 || viewport.y() == 0 || aspectRatioPolicy == AspectRatioPolicy::NotPreserved)
        return {};

    CORRADE_INTERNAL_ASSERT((projectionScale > Math::Vector2<T>(0)).all() && (viewport > Vector2i(0)).all());
    Math::Vector2<T> relativeAspectRatio = Math::Vector2<T>(viewport)*projectionScale;

    /* Extend on larger side = scale larger side down
       Clip on smaller side = scale smaller side up */
    return MatrixTypeFor<dimensions, T>::scaling(Math::Vector<dimensions, T>::pad(
        (relativeAspectRatio.x() > relativeAspectRatio.y()) == (aspectRatioPolicy == AspectRatioPolicy::Extend) ?
        Math::Vector2<T>(relativeAspectRatio.y()/relativeAspectRatio.x(), T(1)) :
        Math::Vector2<T>(T(1), relativeAspectRatio.x()/relativeAspectRatio.y()), T(1)));
}

void Application::toggleFullScreen ()
{
  if (fullscreen)
  {
#ifdef _WIN32
  SetWindowLongPtr(hWnd, GWL_STYLE, WS_OVERLAPPEDWINDOW | WS_VISIBLE);
  SetWindowPos(hWnd, NULL, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOMOVE | SWP_FRAMECHANGED | SWP_SHOWWINDOW);
  // ShowWindow(hWnd, SW_SHOWNORMAL);
#endif
  }
  else
  {
#ifdef _WIN32
  SetWindowLongPtr(hWnd, GWL_STYLE, WS_POPUP | WS_VISIBLE);
  SetWindowPos(hWnd, NULL, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOMOVE | SWP_FRAMECHANGED | SWP_SHOWWINDOW);
  // ShowWindow(hWnd, SW_SHOWMAXIMIZED);
#endif
  }
  fullscreen = !fullscreen;

  // Set the size.
#ifdef _WIN32
  RECT rect;
  GetClientRect(hWnd, &rect);
  size.set(rect.right, rect.bottom); // left and top are always 0.
#endif

  screenToNDC = Transform::screenToNDC<float>(size);
  if (widget != 0)
  {
    widget->setBounds(Box2i::minSize(Vector2i::zero(), size));
  }
}

LRESULT WINAPI wndProc (HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
  switch (msg)
  {
  case WM_CREATE:
    ::hWnd = hWnd;
    break;
  case WM_CLOSE:
    onClose();
    break;
  case WM_SIZE:
    {
      int newWidth = LOWORD(lParam);
      int newHeight = HIWORD(lParam);
      size.set(newWidth, newHeight);
      screenToNDC = Transform::screenToNDC<float>(size);
      if (widget != 0)
      {
        widget->setBounds(Box2i::minSize(Vector2i::zero(), size));
      }
    }
    break;
  case WM_SYSKEYDOWN:
  case WM_KEYDOWN:
    if (wParam == VK_RETURN && (lParam & 0xffff) == 1 && GetKeyState(VK_MENU) < 0) // alt-enter
    {
      Application::toggleFullScreen();
    }
    break;
  default:
    return DefWindowProc(hWnd, msg, wParam, lParam);
  }
  return 0;
}

Eigen::Vector3f unproject(const Eigen::Vector3f &win,
                          const Eigen::Matrix4f &model,
                          const Eigen::Matrix4f &proj,
                          const Vector2i &viewportSize) {
    Eigen::Matrix4f Inverse = (proj * model).inverse();

    Eigen::Vector4f tmp;
    tmp << win, 1;
    tmp(0) = tmp(0) / viewportSize.x();
    tmp(1) = tmp(1) / viewportSize.y();
    tmp = tmp.array() * 2.0f - 1.0f;

    Eigen::Vector4f obj = Inverse * tmp;
    obj /= obj(3);

    return obj.head(3);
}

Matrix3f NNUtilities::calcInverseTransformation(const Vector2i& center, const Vector2i& inSize, const Vector2i& outSize, const Angle rotation)
{
  const Vector2i upperLeft = (center.array() - inSize.array() / 2).matrix();
  const Vector2f transformationFactor = (inSize.cast<float>().array() / outSize.cast<float>().array()).matrix();
  //float sin = std::sin(rotation);
  //float cos = std::cos(rotation);

  Matrix3f inverseTransformation; //TODO check rotation
  inverseTransformation(0, 0) = transformationFactor.x();// *cos;
  inverseTransformation(0, 1) = 0;// transformationFactor.x() * (-sin);
  inverseTransformation(1, 0) = 0;// transformationFactor.y() * sin;
  inverseTransformation(1, 1) = transformationFactor.y();// *cos;

  inverseTransformation(0, 2) = upperLeft.x();// +outSize.x() * (1 - cos + sin) / 2 * transformationFactor.x();
  inverseTransformation(1, 2) = upperLeft.y();// +outSize.y() * (1 - sin - cos) / 2 * transformationFactor.y();
  return inverseTransformation;
}

void CompoundUpdateOutputVisitor::_generateTiles(TileQueue* queue,
                                                 Compound* compound)
{
    const Vector2i& tileSize = queue->getTileSize();
    const PixelViewport& pvp = compound->getInheritPixelViewport();
    if (!pvp.hasArea())
        return;

    const Vector2i dim(pvp.w / tileSize.x() + ((pvp.w % tileSize.x()) ? 1 : 0),
                       pvp.h / tileSize.y() + ((pvp.h % tileSize.y()) ? 1 : 0));

    std::vector<Vector2i> tiles;
    tiles.reserve(dim.x() * dim.y());

    tiles::generateZigzag(tiles, dim);
    _addTilesToQueue(queue, compound, tiles);
}

bool Slider::mouseDragEvent(const Vector2i &p, const Vector2i & /* rel */,
                            int /* button */, int /* modifiers */) {
    if (!mEnabled)
        return false;
    mValue = std::min(std::max((p.x() - mPos.x()) / (float) mSize.x(), (float) 0.0f), (float) 1.0f);
    if (mCallback)
        mCallback(mValue);
    return true;
}

Layout LayoutStack::PutSpace(Vector2i size)
{
	auto& b = stack.back();
	Layout l = b.getNext(b.grow);

	if (l.fill == Dir::Down || l.fill == Dir::Up)
	{
		l.across = size.x();
		l.maxFill = size.y();
	}
	else
	{
		l.across = size.y();
		l.maxFill = size.x();
	}
	b.putNext(l);
	return l;
}