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Diffstat (limited to 'src/resources/ambientoverlay.cpp')
-rw-r--r-- | src/resources/ambientoverlay.cpp | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/resources/ambientoverlay.cpp b/src/resources/ambientoverlay.cpp new file mode 100644 index 00000000..b5304627 --- /dev/null +++ b/src/resources/ambientoverlay.cpp @@ -0,0 +1,73 @@ +/* + * The Mana World + * Copyright 2004 The Mana World Development Team + * + * This file is part of The Mana World. + * + * The Mana World is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * any later version. + * + * The Mana World is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with The Mana World; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * $Id$ + */ + +#include "ambientoverlay.h" + +#include "image.h" + +#include "../graphics.h" + +AmbientOverlay::AmbientOverlay(Image *img, float parallax, + float scrollX, float scrollY, float speedX, float speedY): + mImage(img), mParallax(parallax), + mScrollX(scrollX), mScrollY(scrollY), + mSpeedX(speedX), mSpeedY(speedY) +{ + mImage->incRef(); +} + +AmbientOverlay::~AmbientOverlay() +{ + mImage->decRef(); +} + +void AmbientOverlay::update(int timePassed, float dx, float dy) +{ + // Self scrolling of the overlay + mScrollX -= mSpeedX * timePassed / 10; + mScrollY -= mSpeedY * timePassed / 10; + + // Parallax scrolling + mScrollX += dx * mParallax; + mScrollY += dy * mParallax; + + int imgW = mImage->getWidth(); + int imgH = mImage->getHeight(); + + // Wrap values + while (mScrollX > imgW) + mScrollX -= imgW; + while (mScrollX < 0) + mScrollX += imgW; + + while (mScrollY > imgH) + mScrollY -= imgH; + while (mScrollY < 0) + mScrollY += imgH; +} + +void AmbientOverlay::draw(Graphics *graphics, int x, int y) +{ + graphics->drawImagePattern(mImage, (int)(-mScrollX), (int)(-mScrollY), + x + (int)mScrollX, y + (int)mScrollY); +} |