Method _rebuildGeometry

MyGUIEngine/src/MyGUI_RotatingSkin.cpp:220–348

	}

	void RotatingSkin::_rebuildGeometry()
	{
		/*
			0 1
			3 2
		*/
#ifdef M_PI
	#undef M_PI
#endif
		const float M_PI = 3.141593f;

		float width_base = (float)mCurrentCoord.width;
		float height_base = (float)mCurrentCoord.height;

		// calculate original unrotated angles of uncropped rectangle verticies: between axis and line from center of rotation to vertex)
		float baseAngles[RECT_VERTICIES_COUNT];
		baseAngles[0] = std::atan2((float)mCenterPos.left, (float)mCenterPos.top) + M_PI / 2;
		baseAngles[1] = std::atan2(-width_base + (float)mCenterPos.left, (float)mCenterPos.top) + M_PI / 2;
		baseAngles[2] =
			std::atan2(-width_base + (float)mCenterPos.left, -height_base + (float)mCenterPos.top) + M_PI / 2;
		baseAngles[3] = std::atan2((float)mCenterPos.left, -height_base + (float)mCenterPos.top) + M_PI / 2;

		// calculate original unrotated distances of uncropped rectangle verticies: between center of rotation and vertex)
		float baseDistances[RECT_VERTICIES_COUNT];
		baseDistances[0] = len((float)mCenterPos.left, (float)mCenterPos.top);
		baseDistances[1] = len(-width_base + (float)mCenterPos.left, (float)mCenterPos.top);
		baseDistances[2] = len(-width_base + (float)mCenterPos.left, -height_base + (float)mCenterPos.top);
		baseDistances[3] = len((float)mCenterPos.left, -height_base + (float)mCenterPos.top);


		// calculate rotated positions of uncropped rectangle verticies (relative to parent)
		FloatPoint baseVerticiesPos[RECT_VERTICIES_COUNT];

		int offsetX = /*mCurrentCoord.left +*/ mCenterPos.left;
		int offsetY = /*mCurrentCoord.top +*/ mCenterPos.top;

		for (int i = 0; i < RECT_VERTICIES_COUNT; ++i)
		{
			baseVerticiesPos[i].left = offsetX + std::cos(-mAngle + baseAngles[i]) * baseDistances[i];
			baseVerticiesPos[i].top = offsetY - std::sin(-mAngle + baseAngles[i]) * baseDistances[i];
		}

		// base texture coordinates
		FloatPoint baseVerticiesUV[RECT_VERTICIES_COUNT] = {
			FloatPoint(mCurrentTexture.left, mCurrentTexture.top),
			FloatPoint(mCurrentTexture.right, mCurrentTexture.top),
			FloatPoint(mCurrentTexture.right, mCurrentTexture.bottom),
			FloatPoint(mCurrentTexture.left, mCurrentTexture.bottom)};

		// now we have rotated uncropped rectangle verticies coordinates

		// --------- here the cropping starts ---------

		// now we are going to calculate verticies of resulting figure

		// no parent - no cropping
		size_t size = RECT_VERTICIES_COUNT;
		if (nullptr == mCroppedParent->getCroppedParent())