tag:blogger.com,1999:blog-74596759226535208882011-04-21T20:26:37.920-07:00jxdigitalnoreply@blogger.comBlogger61100tag:blogger.com,1999:blog-7459675922653520888.post-74074115903328656302008-03-13T12:05:00.001-07:002008-03-13T12:15:36.114-07:00It was last year (2007) that I updated the rendering of atmospheric haze in my Gravity simulator. However, I never updated the development website (where the last message dated from 2004....).<br /><br />Over the last few months I started updating the simulator.<br />These things are updated:<br /><ul><li>Addition of multiple satellites, at the place of mouse click (like in the famous <a href="www.colorado.edu/physics/2000/applets/satellites.html">Satellites Java applet</a>)</li><li>Atmospheric haze rendering</li><li>Switch from Euler to "Runge Kutta 4" integrator (for updating the position of the orbiting satellite).</li><li>more..<br /></li></ul><br />So here some previews of the visual updates in the upcomming version.<br />Also notice the use of more high resolution Earth textures:<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://bp2.blogger.com/_NbWPnSAA8jA/R9l7lWQiXdI/AAAAAAAAAFM/AHSNudO8SM8/s1600-h/gravity01.jpg"><img style="cursor: pointer;" src="http://bp2.blogger.com/_NbWPnSAA8jA/R9l7lWQiXdI/AAAAAAAAAFM/AHSNudO8SM8/s400/gravity01.jpg" alt="" id="BLOGGER_PHOTO_ID_5177305128199413202" border="0" /></a><br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://bp0.blogger.com/_NbWPnSAA8jA/R9l7q2QiXeI/AAAAAAAAAFU/-SPHghoi1H4/s1600-h/gravity02.jpg"><img style="cursor: pointer;" src="http://bp0.blogger.com/_NbWPnSAA8jA/R9l7q2QiXeI/AAAAAAAAAFU/-SPHghoi1H4/s400/gravity02.jpg" alt="" id="BLOGGER_PHOTO_ID_5177305222688693730" border="0" /></a><br /><br />(you can see a slight problem here: the atmospheric haze is rendered *over* the HUD text messages)<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://bp0.blogger.com/_NbWPnSAA8jA/R9l7u2QiXfI/AAAAAAAAAFc/LtojpB7RHp4/s1600-h/gravity03.jpg"><img style="cursor: pointer;" src="http://bp0.blogger.com/_NbWPnSAA8jA/R9l7u2QiXfI/AAAAAAAAAFc/LtojpB7RHp4/s400/gravity03.jpg" alt="" id="BLOGGER_PHOTO_ID_5177305291408170482" border="0" /></a><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/7459675922653520888-7407411590332865630?l=gravitysim.blogspot.com' alt='' /></div>jxdigitalnoreply@blogger.com0tag:blogger.com,1999:blog-7459675922653520888.post-54946709478392567612008-03-13T11:10:00.000-07:002008-03-13T11:43:58.246-07:00<span style="font-weight: bold;">Development news</span><br /><br />On this page I will add regular notes when I have updated things to my gravity simulator. You will also be able to download test releases from here.<br /><br />I moved the development log from my Gravity simulator homepage over here. The ability to post comments is something usefull for development updates, I suppose..<br /><br />regards<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/7459675922653520888-5494670947839256761?l=gravitysim.blogspot.com' alt='' /></div>jxdigitalnoreply@blogger.com0tag:blogger.com,1999:blog-7459675922653520888.post-45205481015306420622004-12-08T11:27:00.000-08:002008-03-13T11:28:54.729-07:00I just uploaded an update, changelog:<br />release 0.1 -> 0.2<br />==================<br />*corrected compiler options..<br />now one should be able to run it without extra libraries.<br /><br /><a href="http://members.chello.nl/jj.vanakker/gravity/release_v02.zip">Download Test release 0.2</a><br /><br />Limitations..<br /><br />- You cannot (yet) control more than 1 orbiting object..<br />- You cannot (yet) have more than Earth and Moon to orbit..<br />- The moon isn't really orbiting yet, it's just flying circles.<br />- The earth is Static.<br />- You cannot land/launch from planet's surface (yet)..<br />- Saving/reading pos/vel to file isn't possible yet..<br /><br />All this means that there are lot's of things for me possible to<br />implement in next releases!<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/7459675922653520888-4520548101530642062?l=gravitysim.blogspot.com' alt='' /></div>jxdigitalnoreply@blogger.com0tag:blogger.com,1999:blog-7459675922653520888.post-23287645896378546722004-12-07T11:26:00.000-08:002008-03-13T11:50:05.904-07:00You can now download a test, so if you like, please try it... and give some feedback at my contact address: jvanakker (at) gmail.com thanks!<br /><br />Please read the readme.txt in the package first...<br /><br />Download Test release 0.1 (link deactivated, 0.2 is out)<br /><br />One thing I forgot to add in the readme, is that you can use the Scroll wheel to zoom In or Out<br />in any camera view<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/7459675922653520888-2328764589637854672?l=gravitysim.blogspot.com' alt='' /></div>jxdigitalnoreply@blogger.com0tag:blogger.com,1999:blog-7459675922653520888.post-45747870896006386502004-12-06T11:20:00.000-08:002008-03-13T11:24:48.861-07:00Today I did a few things:<br /><br />- Corrected the moons distance (is now on scale)<br />- Added another Ortho camera to moon<br />I also improved the control of your satellite, the user is now able to control it normally via:<br />- +X Acceleration, -X acceleration,<br />- +Y acceleration, -Y acceleration.<br />You can do this via the arrow keys.<br />This way, one can have some control over the orbiting object, and try to do some fun things,<br />like putting it in Lunar-orbit..<br /><br />Some more screenshots..<br /><br /><a href="http://members.upc.nl/%7Ejj.vanakker/gravity/arrival01.jpg">large screenshot 1</a><br /><a href="http://members.upc.nl/%7Ejj.vanakker/gravity/arrival02.jpg">large screenshot 2</a><br /><a href="http://members.upc.nl/%7Ejj.vanakker/gravity/arrival03.jpg">large screenshot 3</a><br /><a href="http://members.upc.nl/%7Ejj.vanakker/gravity/moonorbit01.jpg">lunar orbit seen from moon's perspective</a><br /><br />Note, that in *this* screenshot, the Moon's orbit was NOT yet on a realistic scale...<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://bp0.blogger.com/_NbWPnSAA8jA/R9lwn2QiXaI/AAAAAAAAAE4/Wq14sR3TkBQ/s1600-h/screenshot06.png"><img style="cursor: pointer;" src="http://bp0.blogger.com/_NbWPnSAA8jA/R9lwn2QiXaI/AAAAAAAAAE4/Wq14sR3TkBQ/s400/screenshot06.png" alt="" id="BLOGGER_PHOTO_ID_5177293076521180578" border="0" /></a><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/7459675922653520888-4574787089600638650?l=gravitysim.blogspot.com' alt='' /></div>jxdigitalnoreply@blogger.com0tag:blogger.com,1999:blog-7459675922653520888.post-9669716319007798272004-12-05T11:12:00.000-08:002008-03-13T11:18:49.302-07:00Today I added the option to show a trail of the orbiting satellite.<br />I do this using the GLLines object in GLScene.<br />At every timestep, I add a new node of the line object at the coordinates<br />of the current satellite position.<br />here are some examples :)<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://bp1.blogger.com/_NbWPnSAA8jA/R9lvfGQiXYI/AAAAAAAAAEo/W5t1g9q-Dbk/s1600-h/screenshot04.png"><img style="cursor: pointer;" src="http://bp1.blogger.com/_NbWPnSAA8jA/R9lvfGQiXYI/AAAAAAAAAEo/W5t1g9q-Dbk/s400/screenshot04.png" alt="" id="BLOGGER_PHOTO_ID_5177291826685697410" border="0" /></a><br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://bp0.blogger.com/_NbWPnSAA8jA/R9lvy2QiXZI/AAAAAAAAAEw/-zcqqAXJXnY/s1600-h/screenshot05.png"><img style="cursor: pointer;" src="http://bp0.blogger.com/_NbWPnSAA8jA/R9lvy2QiXZI/AAAAAAAAAEw/-zcqqAXJXnY/s400/screenshot05.png" alt="" id="BLOGGER_PHOTO_ID_5177292165988113810" border="0" /></a><br /><br />Note that in the following screenshot, the collision with Earth's surface is turned off...<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://bp3.blogger.com/_NbWPnSAA8jA/R9lu9mQiXWI/AAAAAAAAAEY/lk9FTRKHySg/s1600-h/screenshot03.png"><img style="cursor: pointer; width: 399px; height: 319px;" src="http://bp3.blogger.com/_NbWPnSAA8jA/R9lu9mQiXWI/AAAAAAAAAEY/lk9FTRKHySg/s320/screenshot03.png" alt="" id="BLOGGER_PHOTO_ID_5177291251160079714" border="0" /></a><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/7459675922653520888-966971631900779827?l=gravitysim.blogspot.com' alt='' /></div>jxdigitalnoreply@blogger.com0