Method checkForCross

trunk/win/Source/BT_StackIcon.cpp:226–261

Check for cross with Diagonal line-segment defined from the top-L to bottom-R corner of square. If it crosses, perform actions with Cross()

//Check for cross with Diagonal line-segment defined from the top-L to bottom-R corner of square.
//If it crosses, perform actions with Cross()
bool MakeStackIcon::checkForCross(Vec3 currPoint, Vec3 prevPoint)
{
	Vec3 target[4];

	if (enabled)
	{
		// Create a bounding box where the StackIcon resides
		for (uint i = 0; i < 4; i++)
		{
			target[i] = WorldToClient(getCorner(i + 1));
			target[i].z = 0.0f;

			// Corner Index:
			// 1          2
			//  +--------+
			//  |        |
			//  |  ICON  |
			//  |        |
			//  +--------+
			// 3          0
		}

		// Crossing target is defined as -size/2 to size/2 on the z-axis, centered at 'position'
		if (currPoint.x >= target[3].x && currPoint.x <= target[0].x &&
			currPoint.y <= target[3].y && currPoint.y >= target[1].y)
		{
			// ensure that we're not hitting a straight line
			if (lassoMenu->getCurvatureRatio() > 1.2f)
			{
				return lassoMenu->isTailVectorPointingToStackIcon(20.0f);
			}
		}
	}

	return false;
}

void MakeStackIcon::onMouseMove(Vec2 &pt)
{