Development/Tutorials/Games/kglengine/kglengine-simpleBox

KGLEngine tutorial 1

Tutorial Series	KGLEngine2d developement
Prerequisites	None
What's Next	Nothing at the moment
Further Reading	KGLEngine2d's code

Abstract

( Class names has changed ! This tutorial is currently unvaible )

KGLengine is a powerfull 2d games engine, for people who want to create hight level of games. Instead QGraphicsView system, KGLEngine use all power of openGL and Eigen mathematic library. Now you will be able to create fullscreen games, particles effects for make smoke or explosion, shadow effects, collision detection with a lot of items, and as soon as possible to use Shaders effects.

Installation

First : install eigen2 librairy. Second, be sure you have libQt4-dev, libQt4-openGL-dev, and kde4-lib devel. download KGLEngine source from svn :

svn co svn://anonsvn.kde.org/home/kde/trunk/playground/games/KGLEngine

cd kglengine mkdir build cd build cmake .. make; make install;

First program

#include <KApplication>
#include <KAboutData>
#include <KCmdLineArgs>

#include <KGLEngine2d>
#include <KGLItem>


using namespace std;


int main(int argc, char *argv[])
{
    KAboutData aboutData("kglintro", 0,
                         ki18n("tutorial1"), "1.0",
                         ki18n("engine 2d"),
                         KAboutData::License_GPL,
                         ki18n("Copyright (c) 2009 Developer"));
    KCmdLineArgs::init(argc, argv, &aboutData);
    KApplication app;

    KGLEngine2d *engine= KGLEngine2d::instance(); //init engine
 

    engine->setShowAxis(true); //show repere line x,y
    engine->setShowFps(true);   //show fps
    engine->show();  //show window engine


    KGLItem * box = new KGLItem(QRectF(0,0,0.5,0.5));  //create an item
    box->scale(0.5); //reduce the size
    box->translate(-box->transformCenter()); //translate the box to the center
    box->rotate(M_PI/4); //rotate it with a radius = 45 deg
    box->setColor(Qt::white); //setColor! By default, it's white
    engine->addItem(box); //add item to the engine



     app.exec();
    
    return 0;
}

Compilation

This is the CmakeLists.txt Files.

project(tutorial1)

find_package(KDE4 REQUIRED)
find_package(Qt4 REQUIRED)
find_package(OpenGL REQUIRED)
find_package(Eigen2 REQUIRED)

include(KDE4Defaults)

include_directories(${KDE4_INCLUDES})
include_directories(${QT_QTOPENGL_INCLUDE_DIR})
include_directories(${X11_Xrandr_INCLUDE_PATH})
include_directories(${CMAKE_CURRENT_SOURCE_DIR})
include_directories(${EIGEN2_INCLUDE_DIR})

add_definitions(${QT_DEFINITIONS} ${KDE4_DEFINITIONS})




########### next target ###############

set(tutorial1_SRCS 
   main.cpp 
	)

kde4_add_executable(tutorial1 ${tutorial1_SRCS} )

target_link_libraries(tutorial1 ${KDE4_KDEUI_LIBS} kglengine)

########### install files ###############