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https://github.com/worldforge/ember
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271cf8024f
Put all external code under "external". We can't use too many warnings though since there's a lot of code we don't control.
361 lines
No EOL
13 KiB
C++
361 lines
No EOL
13 KiB
C++
/*-------------------------------------------------------------------------------------
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Copyright (c) 2006 John Judnich
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This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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-------------------------------------------------------------------------------------*/
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#ifndef __TreeLoader3D_H__
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#define __TreeLoader3D_H__
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#include "PagedGeometry.h"
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#include "PropertyMaps.h"
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#include <OgrePrerequisites.h>
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namespace Forests {
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class TreeIterator3D;
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class TreeIterator2D;
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/** \brief A PageLoader-derived object you can use with PagedGeometry to easily place trees on your terrain.
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\note TreeLoader3D is derived from PageLoader - this implementation provides you with an easy way
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to add trees to your scene. Remember that if the included PageLoader's aren't enough, you can easily
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create your own to load geometry any way you want. You could even modify existing an PageLoader
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to suit your needs.
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Using a TreeLoader is simple - simply create an instance, attach it to your PagedGeometry object
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with PagedGeometry::setPageLoader(), and add your trees.
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To add trees, just call TreeLoader3D::addTree(), supplying the appropriate parameters. You may notice that
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TreeLoader3D restricts trees to uniform scale and yaw rotation. This is done to conserve memory; TreeLoader3D
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packs trees into memory as effeciently as possible, taking only 10 bytes per tree. This means 1 million trees
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takes 9.53 MB of RAM (additionally, adding 1 million trees takes less than a second in a release build).
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\note Using TreeLoader2D uses 40% less memory than TreeLoader3D.
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*/
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class TreeLoader3D: public PageLoader
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{
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public:
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/** \brief Creates a new TreeLoader3D object.
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\param geom The PagedGeometry object that this TreeLoader3D will be assigned to.
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\param bounds The rectangular boundary in which all trees will be placed. */
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TreeLoader3D(PagedGeometry *geom, const TBounds &bounds);
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~TreeLoader3D();
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/** \brief Adds an entity to the scene with the specified location, rotation, and scale.
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\param entity The entity to be added to the scene.
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\param position The desired position of the tree
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\param yaw The desired rotation around the vertical axis in degrees
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\param scale The desired scale of the entity
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While TreeLoader3D allows you to provide full 3-dimensional x/y/z coordinates,
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you are restricted to only yaw rotation, and only uniform scale.
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\warning By default, scale values may not exceed 2.0. If you need to use higher scale
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values than 2.0, use setMaximumScale() to reconfigure the maximum. */
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void addTree(Ogre::Entity *entity, const Ogre::Vector3 &position, Ogre::Degree yaw = Ogre::Degree(0), Ogre::Real scale = 1.0f, void* userData = NULL);
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/** \brief Deletes trees within a certain radius of the given coordinates.
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\param position The coordinate of the tree(s) to delete
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\param radius The radius from the given coordinate where trees will be deleted
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\param type The type of tree to delete (optional)
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\note If the "type" parameter is set to an entity, only trees created with that entity
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will be deleted. */
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#ifdef PAGEDGEOMETRY_USER_DATA
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std::vector<void*>
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#else
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void
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#endif
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deleteTrees(const Ogre::Vector3 &position, Ogre::Real radius, Ogre::Entity *type = NULL);
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#ifdef PAGEDGEOMETRY_USER_DATA
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/** \brief Find trees within a certain radius of the given coordinates.
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\param position The coordinate of the tree(s) to look for
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\param radius The radius from the given coordinate where trees will be deleted
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\param type The type of tree to find (optional)
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\note If the "type" parameter is set to an entity, only trees created with that entity
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will be found. */
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std::vector<void*> findTrees(const Ogre::Vector3 &position, float radius, Ogre::Entity *type = NULL);
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#endif
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/** \brief Deletes trees within a certain rectangular area.
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\param area The area where trees are to be deleted
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\param type The type of tree to delete (optional)
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\note If the "type" parameter is set to an entity, only trees created with that entity
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will be deleted. */
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#ifdef PAGEDGEOMETRY_USER_DATA
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std::vector<void*>
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#else
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void
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#endif
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deleteTrees(TBounds area, Ogre::Entity *type = NULL);
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/** \brief Gets an iterator which can be used to access all added trees.
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The returned TreeIterator3D can be used to iterate through every tree that was added
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to this TreeLoader3D fairly efficiently.
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\see The TreeIterator class documentation for more info.
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\warning Be sure to test TreeIterator3D::hasMoreElements() before calling other members of the
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TreeIterator3D class. */
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TreeIterator3D getTrees();
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/** \brief Sets the color map used to color trees
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\param mapFile The color map image
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\param channel The color channel(s) to from the image to use
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A color map is simply a texture that allows you to vary the color and shading of trees
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across your world for a more realistic look. For example, adding a dark spot to the center
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of your color map will make trees near the center of your world look darker.
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The channel parameter allows you to extract the color information from the image's
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red, green, blue, alpha, or color values. For example, you may store the desired shade of your
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trees in the red channel of an image, in which case you would use CHANNEL_RED (when you choose
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a single channel, it is converted to a greyscale color). By default, CHANNEL_COLOR is used,
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which uses the full color information available in the image. */
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void setColorMap(const Ogre::String &mapFile, MapChannel channel = CHANNEL_COLOR);
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/** \brief Sets the color map used to color trees
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Overloaded to accept a Texture object. See the original setColorMap() documentation above
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for more detailed information on color maps.
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\note The texture data you provide is copied into RAM, so you can delete the texture after
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calling this function without risk of crashing. */
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void setColorMap(Ogre::TexturePtr map, MapChannel channel = CHANNEL_COLOR);
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/** \brief Gets a pointer to the color map being used
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You can use this function to access the internal color map object used by the TreeLoader3D.
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Through this object you can directly manipulate the pixels of the color map, among other
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things.
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Note that although you can edit the color map in real-time through this class, the changes
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won't be uploaded to your video card until you call PagedGeometry::reloadGeometry(). If you
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don't, the colors of the trees you see will remain unchanged. */
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ColorMap *getColorMap() { return colorMap; }
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/** \brief Sets the filtering mode used for the color map
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This function can be used to set the filtering mode used for your tree color map.
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By default, no filtering is used (MAPFILTER_NONE). If you enable bilinear filtering
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by using MAPFILTER_BILINEAR, the resulting tree coloration may appear more smooth
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(less pixelated), depending on the resolution of your color map.
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MAPFILTER_BILINEAR is slightly slowe than MAPFILTER_NONE, so don't use it unless you notice
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considerable pixelation. */
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void setColorMapFilter(MapFilter filter)
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{
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colorMapFilter = filter;
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if (colorMap)
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colorMap->setFilter(colorMapFilter);
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}
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/** \brief Sets the maximum tree scale value
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When calling addTree() to add trees, the scale values you are allowed to use are restricted
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to 2.0 maximum by default. With this function, you can adjust the maximum scale you are allowed
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to use for trees. However, keep in mind that the higher the maximum scale is, the less precision
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there will be in storing the tree scales (since scale values are actually packed into a single byte).
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\warning Be sure to call this before adding any trees - otherwise adjusting this value will cause
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the size of the currently added trees to change. */
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void setMaximumScale(Ogre::Real maxScale)
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{
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maximumScale = maxScale;
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}
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/** \brief Gets the maximum tree scale value
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\returns The maximum tree scale value
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This function will return the maximum tree scale value as set by setMaximumScale(). By
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default this value will be 2.0. */
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float getMaximumScale()
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{
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return maximumScale;
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}
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/** \brief Sets the minimum tree scale value
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When calling addTree() to add trees, the scale values you are allowed to use are restricted
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in the range of 0.0 - 2.0 by default. With this function, you can adjust the minimum scale you are
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allowed to use for trees. The closer this minimum value is to the maximum tree scale, the more
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precision there will be when storing trees with addTree().
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\warning Be sure to call this before adding any trees - otherwise adjusting this value will cause
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the size of the currently added trees to change. */
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void setMinimumScale(Ogre::Real minScale)
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{
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minimumScale = minScale;
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}
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/** \brief Gets the minimum tree scale value
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\returns The minimum tree scale value
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This function will return the minimum tree scale value as set by setMinimumScale(). By
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default this value will be 0. */
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float getMinimumScale()
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{
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return minimumScale;
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}
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/** \brief Gets the tree boundary area
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\returns A TBounds boundary value
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This function returns the boundaries in which all trees are added. This value is set from the constructor. */
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inline const TBounds &getBounds()
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{
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return actualBounds;
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}
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void loadPage(PageInfo &page);
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private:
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friend class TreeIterator3D;
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struct TreeDef
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{
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float yPos;
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Ogre::uint16 xPos, zPos;
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Ogre::uint8 scale, rotation;
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#ifdef PAGEDGEOMETRY_USER_DATA
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void *userData;
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#endif
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};
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//Information about the 2D grid of pages
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int pageGridX, pageGridZ;
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Ogre::Real pageSize;
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TBounds gridBounds, actualBounds;
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Ogre::Real maximumScale, minimumScale;
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//Colormap
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ColorMap *colorMap;
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MapFilter colorMapFilter;
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//Misc.
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PagedGeometry *geom;
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//A std::map of 2D grid arrays. Each array is the same size (pageGridX x pageGridZ), and
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//contains a std::vector list of trees. Each std::map entry corresponds to a single tree
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//type, and every tree defined in the std::map entry's grid should be of that tree type.
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std::map<Ogre::Entity*, std::vector<TreeDef>*> pageGridList;
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typedef std::map<Ogre::Entity*, std::vector<TreeDef>*>::iterator PageGridListIterator;
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typedef std::pair<Ogre::Entity*, std::vector<TreeDef>*> PageGridListValue;
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inline std::vector<TreeDef> &_getGridPage(std::vector<TreeDef> *grid, int x, int z)
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{
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#ifdef _DEBUG
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if(x >= pageGridX || z >= pageGridZ )
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OGRE_EXCEPT(Ogre::Exception::ERR_INVALIDPARAMS,
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"Grid dimension is out of bounds",
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"TreeLoader2D::_getGridPage()");
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#endif
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return grid[z * pageGridX + x];
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}
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inline void _setGridPage(std::vector<TreeDef> *grid, int x, int z, const std::vector<TreeDef> &page)
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{
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#ifdef _DEBUG
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if(x >= pageGridX || z >= pageGridZ )
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OGRE_EXCEPT(Ogre::Exception::ERR_INVALIDPARAMS,
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"Grid dimension is out of bounds",
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"TreeLoader2D::_getGridPage()");
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#endif
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grid[z * pageGridX + x] = page;
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}
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};
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//The TreeRef class is used by both TreeLoader2D and TreeLoader3D.
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//This #ifndef makes sure TreeRef isn't declared twice in case both treeloaders are used.
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#ifndef TreeRef_Declared
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#define TreeRef_Declared
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class TreeRef
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{
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public:
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/** Returns the tree's position */
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inline Ogre::Vector3 &getPosition() { return position; }
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/** Returns the tree's yaw as a degree value */
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inline Ogre::Degree &getYaw() { return yaw; }
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/** Returns the tree's uniform scale value */
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inline Ogre::Real &getScale() { return scale; }
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/** Returns the tree's orientation as a Quaternion */
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inline Ogre::Quaternion getOrientation() { return Ogre::Quaternion(yaw, Ogre::Vector3::UNIT_Y); }
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/** Returns the entity used to create the tree */
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inline Ogre::Entity *getEntity() { return entity; }
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#ifdef PAGEDGEOMETRY_USER_DATA
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/** Returns the user-defined data associated with this tree */
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inline void* getUserData() { return userData; }
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#endif
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private:
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friend class TreeIterator2D;
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friend class TreeIterator3D;
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Ogre::Vector3 position;
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Ogre::Degree yaw;
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Ogre::Real scale;
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Ogre::Entity *entity;
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#ifdef PAGEDGEOMETRY_USER_DATA
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void* userData;
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#endif
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};
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#endif
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class TreeIterator3D
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{
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public:
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TreeIterator3D(TreeLoader3D *trees);
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/** Returns true if there are more trees available to be read */
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inline bool hasMoreElements() const { return hasMore; }
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/** Returns the next tree, and advances to the next */
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TreeRef getNext();
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/** Returns the next tree, without advancing to the next */
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inline TreeRef &peekNext() { return prevTreeDat; }
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/** Returns a pointer to the next tree, without advancing to the next */
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inline TreeRef *peekNextPtr() { return &prevTreeDat; }
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/** Moves the iterator on to the next tree */
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void moveNext();
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private:
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void _readTree();
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TreeLoader3D *trees;
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TreeLoader3D::PageGridListIterator currentGrid;
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int currentX, currentZ;
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std::vector<TreeLoader3D::TreeDef> *currentTreeList;
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std::vector<TreeLoader3D::TreeDef>::iterator currentTree;
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TreeRef currentTreeDat, prevTreeDat;
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bool hasMore;
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};
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}
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#endif |