Java OpenGL and jogl getting started example -- collision and moving cube

Step 1: Go to https://jogl.dev.java.net/download jogl-1.1.2-pre-20080523-windows-i586.zip
 
Decompress to a random folder, such as: C:/program files/Java/jogl-1.1.2-pre-20080523-windows-i586
 
Open eclipse, and click File --> New ---> Project ---> project name, for example, my_opengl ---- finish.
 
After creating a project, find the new project in the workspace on the left.

For example, my_opengl, right click --> properties --> JAVA build path select libraries ---> Add external jars
 
Find the original decompressed folder such as: C:/program files/Java/jogl-1.1.2-pre-20080523-windows-i586

Find Lib in it, open ---> double-click jogl. jar and gluegen-rt.jar to add these two jar packages to our libraries
 
In this case, you can see the jogl. jar and gluegen-rt.jar packages in libraries, select jogl. jar,
 
---> Native library location: ----> edit ---> external Folder
 
--> C:/program files/Java/jogl-1.1.2-pre-20080523-windows-i586/lib
 
This completes the configuration.
 
 
 

In the my_opengl project, create a Class, Class Name: opengl_bounce
 
CTRL + C first, copy the following code to the class,

Import Java. AWT. borderlayout; import Java. AWT. frame; import Java. AWT. headlessexception; import Java. AWT. event. windowadapter; import Java. AWT. event. using wevent; import javax. media. openGL. GL; import javax. media. openGL. glautodrawable; import javax. media. openGL. glcanvas; import javax. media. openGL. glcapabilities; import javax. media. openGL. gleventlistener; public class opengl_bounce extends frame impleme CNT gleventlistener, runnable {float X1 = 100366f; // X coordinate float Y1 = 150366f; // y coordinate long rsize = 50; // The reserved position for the rectangle width or the distance from float xstep = 1.0f; // The distance along the X step displacement. Of course, you can increase the float ystep = 1.0f; // float horizontal wwidth along the y step; // This is not the width of the form border, but the float horizontal wheight on the right side of the visual projection; // It is not the height of the form border, it is the top GL of visual projection; // the main interface glcanvas of OpenGL; // similar to Java. AWT. canvas and glcanvas are mainly used to display the effects of various OpenGL glcapabilities capabilities; // Set a set of OpenGL functions: the rendering content must be supported, such as the color depth and whether the stereo is enabled. Thread mythread = new thread (this); Public opengl_bounce () throws headlessexception {This. capabilities = new glcapabilities (); // instantiate capabilities this. glcanvas = new glcanvas (capabilities); // instantiate glcanvas this. glcanvas. addgleventlistener (this); // Add a GL event to glcanvas to process this. add (glcanvas, borderlayout. center); // Add a component: glcanvas this. addwindowlistener (New windowadapter () {// Add the Close event public void windowclosing (LOGIN wevent e) to the form {system. exit (0) ;}}); mythread. start (); // main thread start} public static void main (string [] ARGs) {opengl_bounce F = new opengl_bounce (); F. settitle ("moving moment"); F. setsize (800,600); F. setvisible (true);} public void display (glautodrawable drawable) {If (x1> export wwidth-rsize | X1 <0) {xstep =-xstep ;} if (Y1> running wheight-rsize | Y1 <0) {ystep =-ystep;} If (x1> running wwidth-rsize) {x1 = running wwidth-rsize ;} if (Y1> Returns wheight-rsize) {y1 = returns wheight-rsize;} X1 + = xstep; Y1 + = ystep; GL. glclear (GL. gl_color_buffer_bit); GL. glcolor3f (1.0f, 0.0f, 0.0f); GL. glrectf (x1, Y1, X1 + rsize, Y1 + rsize); GL. glflush (); glcanvas. swapbuffers ();} public void displaychanged (glautodrawable drawable, Boolean arg1, Boolean arg2) {} public void Init (glautodrawable drawable) {GL = drawable. getgl (); GL. glclearcolor (0.0f, 0.0f, 1.0f, 1.0f);} public void reshape (glautodrawable drawable, int X, int y, int W, int h) {If (H = 0) {H = 1;} GL. glviewport (0, 0, W, H); GL. glmatrixmode (GL. gl_projection); GL. glloadidentity (); If (W <= h) {This. required wwidth = 2500000f; this. required wheight = 250366f * H/W;} else {This. required wwidth = 2500000f * W/H; this. required wheight = 250366f;} GL. glortho (0.0f, 1_wwidth, 0.0f, windowheight, 1.0f,-1.0f); GL. glmatrixmode (GL. gl_modelview); GL. glloadidentity ();} public void run () {While (true) {glcanvas. display (); // The main thread does not stop calling display () Try {mythread. sleep (20); // a rest of 20 milliseconds after each execution} catch (interruptedexception ex) {ex. printstacktrace ();}}}}

Let's not talk about the runnable interface. This is a multi-threaded interface,
 
We can directly see the implements gleventlistener in the above Code, which is used to declare a client code to manage events rendered by OpenGL.
 
Four methods in the gleventlistener interface must be overwritten (of course, instead of re-writing, eclipse will automatically prompt you to load these methods ):

Public void Init (glautodrawable drawable) is called at the initial test. Public void display (glautodrawable drawable) // is called as a drawing action, that is, the Main drawing function {If (x1> drawing wwidth-rsize | X1 <0) {when the X coordinate of the moment type is greater than the rightmost or less than 0 of the view, move backward x} public void displaychanged (glautodrawable drawable, Boolean arg1, Boolean arg2) // The Public void reshape (glautodrawable drawable, int X, int y, int W, int h) {}// when the screen size changes, it will be called at least once at the beginning. final Result: xstep =-xstep;} If (Y1> windowheight-rsize | Y1 <0) {when the Y coordinate of the moment is greater than the rightmost or less than 0 of the vision, take ystep =-ystep in the direction of Y;} If (x1> wxwwidth-rsize) {when the X coordinate of the rectangle arrives at the rightmost of the view, first stop X1 = running wwidth-rsize;} If (Y1> running wheight-rsize) {when the Y coordinate of the moment type reaches the rightmost of the view, first stop Y1 = running wheight-rsize ;} x1 + = xstep; Y1 + = ystep; GL. glclear (GL. gl_color_buffer_bit); In Init (), the background color is set to blue, and GL needs to be cleared here. glcolor3f (1.0f, 0.0f, 0.0f); set the paint brush color to Red GL. glrectf (x1, Y1, X1 + rsize, Y1 + rsize); rectangle type, coordinate (x1, Y1) GL. glflush (); refresh glcanvas. swapbuffers (); Update foreground buffer and background buffer {GL = drawable. getgl (); Use the drawable device to obtain the GL interface. This statement is required. Otherwise, an error is returned. glclearcolor (0.0f, 0.0f, 1.0f, 1.0f); sets the current background clearing color to Blue RGB (, 1), and the system defaults to black}

From: http://blog.csdn.net/wjyjimy2/article/details/4055350