OpenGL and 3D Libraries - Processing Discourse

OpenGL and 3D Libraries - Processing Discourse board_OpenGL.html OpenGL and 3D Libraries - Processing Discourse en-us Processing Discourse Thu, 22 Mar 2012 06:27:22 +0000 http://blogs.law.harvard.edu/tech/rss 30 smooth() circle (noob) num_1276767681.html Processing Discourse/OpenGL and 3D Libraries num_1276767681.html Thu, 17 Jun 2010 02:41:21 +0000 Hi, I'm trying to have a smooth drawing of a circle. For now I'm not using OPENGL but just the smooth() function. I find the quality of drawing extremely disappointing, but I'm shure it is because of the implementation, just adding OPENGL doesn't change anything Can anyone advice me on how to get stuff really smooth, I've looked in the discourse, but the related topics are mostly old ones. here is a small sketch with what I'm doing(really a sketch!): // import processing.opengl.*; float a; float b; float x; float y; float d; float angle; boolean onCircle=false; color c; float[] center= new float[2]; void setup(){ smooth(); size(400,400); //size(400,400,OPENGL); background(0); frameRate(100); a=random(width); b=random(height); d=60; angle=0; c=color(200,200,255,255); center[0]=width/2; center[1]=height/2; println("centerPoint: "+center[0]+"_"+center[1]); } void draw(){ noStroke(); fill(0,0,0,10); rect(0,0,width,height); ellipseMode(CENTER); noFill(); stroke(c); //strokeWeight(1); ellipse(a,b,d,d); x=a+cos(radians(angle))*d/2; y=b+sin(radians(angle))*d/2; line(a,b,x,y); stroke(128); line(a,b,center[0],center[1]); noStroke(); fill(c); ellipse(x,y,5,5); angle+=1; } void mouseInteraction(){ } void mousePressed(){ if(onCircle){ } } thx Pieter shapes3d: making a new shape num_1276435665.html Processing Discourse/OpenGL and 3D Libraries num_1276435665.html Mon, 14 Jun 2010 15:02:24 +0000 hi cool status I have 3D text made out of boxes via shapes3d library generated from the arrays I put together for the 2D prototype this uses peasycam so 3D text object can be moved about by user then adding the fluidforms lib 3D object becomes very hard to get hold of & the generated STL file isnt getting any results in Blender. Exported a STL from the non extruded custom shapes sketch I started with this imports into Blender but shapes are all screwy - as in the + of a letter t has the corners replaced with diagonals and letters like 'o' which I made out of 2 seperate shapes just turns into solid shape so some way still to go... & thanks again to everyone for pionters to resources etc m OpenGL alpha/transparency trouble num_1276291225.html Processing Discourse/OpenGL and 3D Libraries num_1276291225.html processing@tiemenrapati.com (Rapatsk1) Fri, 11 Jun 2010 15:44:26 +0000 <a class="message" href="num_1276291225.html#5">Cedric wrote</a> on Jun 11th, 2010, 3:41pm: <div class="quote" style="width: 90%">Just realized you are doing an internship at field... have fun working with marcus and vera-maria. they do great work! </div> Haha yes, I will join them in july. Do you know them personally Probably won't do Processing though. On to C++... <img src="yabbfiles/Templates/Forum/processing_one/rolleyes.gif" border="0" alt="Roll Eyes" title="Roll Eyes" /> Problem with OpenGL Renderer num_1276070335.html Processing Discourse/OpenGL and 3D Libraries num_1276070335.html Fri, 11 Jun 2010 03:46:49 +0000 Hi, well it doesn't matter which code... as soon as I use OPENGL instead of P3D as renderer, the output windows remains white.. For instance with the included example LightsGL. As soon as I replace the line size(1024, 768, OPENGL); with size(1024, 768, P3D); it's working. For debugging I've inserted println() at different places around the code. The output appears in the log, the code seams to be executed, just the window remains white... The FAQ says to use original Dell driver. Unfortunately there are no Dell driver for nvidia 7400go/Windows 7. Next week, I will be home again and try to run it on my desktop pc...maybe it's just a driver issue.. thx peter Video with alpha channel num_1276082717.html Processing Discourse/OpenGL and 3D Libraries num_1276082717.html Wed, 09 Jun 2010 12:17:57 +0000 OK, i've got it. One have to set the blending conditions. Just two lines:   gl.glEnable (gl.GL_BLEND);   gl.glBlendFunc (gl.GL_ONE, gl.GL_SRC_ALPHA); (gl.glBlendFunc (gl.GL_ONE, gl.GL_ONE); works too) This allow us to work with transparency in the next videos or images to draw. So, final code is: myMovie = new JMCMovieGL(this,"movie_w_alpha.mov",PImage.ARGB); and draw in OpenGL mode. In this code i draw two movies to check if alpha channel is working or not: PGraphicsOpenGL pgl = (PGraphicsOpenGL) g; GL gl = pgl.beginGL();   {   gl.glEnable (gl.GL_BLEND);   gl.glBlendFunc (gl.GL_ONE, gl.GL_SRC_ALPHA);   myMovie.image(gl, 0, 0, myMovie.width, myMovie.height);   myMovie.image(gl, width/2, 0, myMovie.width, myMovie.height);   // you can draw other videos with (or not) transparency)   // mySecondMovie.image(gl, width/2, 0, myMovie.width, myMovie.height); } pgl.endGL(); I hope this will serve you! Ciao! OpenGL on 2GPU / 4display num_1275645976.html Processing Discourse/OpenGL and 3D Libraries num_1275645976.html Sun, 06 Jun 2010 12:04:07 +0000 You helped me a lot! Thank You very much for sharing Your knowledge. orientation of text() in 3D (appears with Y-flip) num_1275831153.html Processing Discourse/OpenGL and 3D Libraries num_1275831153.html Sun, 06 Jun 2010 07:02:03 +0000 Dear Cedric, Thanks for your fast reply.  You'll see that I've managed to post the screenshot now. I had already experimented with scale() and also RotateX().  This indeed works, but it means that if I actually want text to appear at the top for example, I have to do: RotateX(PI); // or scale (1,-1,1) // I have to second-guess rotate and spec -20 instead of 20 text("the text", 0, -20, 0); ... In short, because the y-flip is active to fix text *orientation*, I have to pre-flip all position y-coordinates.  I was wondering if there were a better solution. Thanks again, Charl GLGraphics: Faster pixel coping between textures num_1274372230.html Processing Discourse/OpenGL and 3D Libraries num_1274372230.html Fri, 04 Jun 2010 13:44:40 +0000 I am not really sure what you want to do with your code the fastest way to do this is probably to write a pixelshader. Than you draw the video texture into a framebuffer using the shader. In the shader you check the color of every pixel from the video texture and define the output color as needed. vsync on two monitors num_1275651059.html Processing Discourse/OpenGL and 3D Libraries num_1275651059.html Fri, 04 Jun 2010 04:30:59 +0000 i was wondering whether someone knew how to to vertically sync the  image of a second monitor (a video projector hooked up to a mac book pro). this works perfectly on the computer screen by itself, but when i hook up the projector, tearing is very visible. void enableVSync() {                                    pgl = (PGraphicsOpenGL) g;      gl = pgl.beginGL();      gl.setSwapInterval(1);      pgl.endGL();                                                 } any help would be appreciated! OpenGL error message num_1259153224.html Processing Discourse/OpenGL and 3D Libraries num_1259153224.html Thu, 03 Jun 2010 13:09:09 +0000 I have reported this issue as a bug, it is bug 1570 if you want to track it, and Fry is looking in to it. Fry has identified a couple of possible issues at work:- 1. If the contributed library contains opengl libraries (it should not) their presence could conflict with the processing libraries opengl? 2. Sun have changed their opengl signatures? The bug is currently unresolved. For now I think the practical solution is to temporarily move/remove offending contributed libraries (or update them as appropriate). 3D Rendering - Export to Frames via analysis num_1275501181.html Processing Discourse/OpenGL and 3D Libraries num_1275501181.html processing@tiemenrapati.com (Rapatsk1) Thu, 03 Jun 2010 12:57:54 +0000 Haha no way! I'm happy it worked. To be credited I expect to do more work <img src="yabbfiles/Templates/Forum/processing_one/wink.gif" border="0" alt="Wink" title="Wink" /> Actually, I'll probably use this method too some time. Cheers OpenGL rendering problem num_1275378926.html Processing Discourse/OpenGL and 3D Libraries num_1275378926.html Tue, 01 Jun 2010 00:55:26 +0000 Hi, I need advice on fixing a strange bug/issue with openGL after installing Java 1.6.0 Update 2 on Snow Leopard. (I moved this post from integration, as it turns out the problem is confined to opengl rendering) In short: - a line positioned in the center of the window is rendered correctly in P3D & OPENGL; - a point positioned in the center of the window, is rendered correclty in P3D, but in OPENGL it appears at a different location (see screenshot below) flickr.com/photos/lyubomirpopov/4655765441/sizes/l/ This happens on a freshly installed Snow Leopard, with Java for Mac OS X Update2. Currently, this "Update 2" is my main suspect, as the same code runs as you'd expect on a different machine with Update 1 installed. -l Can´t get matrix position num_1274786344.html Processing Discourse/OpenGL and 3D Libraries num_1274786344.html Sun, 30 May 2010 16:21:03 +0000 Finally I find a way to get de position of the matrix with this: Code:<pre class="code"> PMatrix3D mp = (PMatrix3D)getMatrix(); mx = mp.m03; my = mp.m13; mz = mp.m23; </pre> Now I have this: Code:<pre class="code">PMatrix3D matrix; float p = 10; //"size" SPACESHIP float zs = 0.1; //accelaration SPACESHIP float endZS; //accelaration SPACESHIP float easing = 0.05; //accelaration SPACESHIP Cubo[] cubos;//CUBES float mx; float my; float mz; void setup() { size(800,600,P3D); noStroke(); cursor(CROSS); //call CUBES cubos = new Cubo[1000]; for (int i = 0; i < cubos.length; i++ ) { cubos[i] = new Cubo(random(-3000,3000),random(-3000,3000),random(0,50)); } matrix = new PMatrix3D(); // this is a hack for 1.0.9 ((PGraphics3D)g).cameraNear = -8; } void draw() { background(230); //LIGHT directionalLight(126, 126, 126, 0, 0, -1); ambientLight(150, 150, 150); //accelaration SPACESHIP endZS += 0.001; zs = zs + (endZS - zs)*easing; // scene location -- note the z is the camera offset translate(width/2,height*0.7,(height/2)/tan(PI/6)); // move a step (-1 in Z = into the scene) matrix.translate(0,0,-zs); // rotate according to the current mouse position matrix.rotateY( 0.0001 * (width/2-mouseX) ); PMatrix3D inv = new PMatrix3D(matrix); inv.invert(); applyMatrix(inv); pushMatrix(); applyMatrix(matrix); translate(0, 20, -260); spaceship(); popMatrix(); //CUBES for (int i = 0; i < cubos.length; i++ ) { cubos[i].display(); } PMatrix3D mp = (PMatrix3D)getMatrix(); mx = mp.m03; my = mp.m13; mz = mp.m23; println("mx: " + mx); println("my: " + my); println("mz: " + mz); } void keyPressed() { matrix = new PMatrix3D(); } void spaceship(){ beginShape(TRIANGLES); fill(92,201,206); vertex(-p, 0,0); vertex(p, 0, 0); vertex(0, 0, p-30); fill(92,201,206); vertex(0, -p+5, 0); vertex(p, 0, 0); vertex(0, 0, p-30); fill(92,201,206); vertex(0, -p+5, 0); vertex(-p, 0, 0); vertex(0, 0, p-30); fill(92,201,206); vertex(0, -p+5, 0); vertex(-p, 0, 0); vertex(p, 0, 0); endShape(CLOSE); } </pre> But now, I can't use this values to intersect the spaceship (matrix) with the cubes.I'm trying with this code in cube's class but the intersection isn't correctly: Code:<pre class="code"> if (x >= mx-300 && x <= mx+300 && z >= mz-300 && z <= mz+300){ f = color (24,240,10); } else { f = color (242,118,56); } </pre> Bye! Setting an Image in Background?????????????? num_1275169846.html Processing Discourse/OpenGL and 3D Libraries num_1275169846.html Sun, 30 May 2010 09:59:44 +0000 Good one! new working sunflow library in processing num_1274558471.html Processing Discourse/OpenGL and 3D Libraries num_1274558471.html Sat, 29 May 2010 01:02:39 +0000 @Zaphod Where's the Source, Luke? <img src="yabbfiles/Templates/Forum/processing_one/rolleyes.gif" border="0" alt="Roll Eyes" title="Roll Eyes" />  >>> Found the source:  inside the jar There is much to be done, and I'd love to help. - Chaotic Crazy Fast OpenGL Text num_1269375446.html Processing Discourse/OpenGL and 3D Libraries num_1269375446.html Fri, 28 May 2010 18:59:32 +0000 I was working with somthing like this some time ago (those were the days lol). I'm going to have a look around the old computers and see if I can dig anything up on similar speed-text. james Opengl syntax num_1274971310.html Processing Discourse/OpenGL and 3D Libraries num_1274971310.html Thu, 27 May 2010 09:20:57 +0000 http://processing.org/reference/libraries/opengl/index.html basically  PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;  // g may change  GL gl = pgl.beginGL();  // always use the GL object returned by beginGL   then gl.glWhatever(); for methods and GL.GL_WHATEVER for constants. then  pgl.endGL(); Removing Objects from PApplet / Rotation of Object num_1272357250.html Processing Discourse/OpenGL and 3D Libraries num_1272357250.html peter@lagers.org.uk (Quark) Thu, 27 May 2010 07:47:24 +0000 I can't see any obvious errors in the code but in terms of manipulating rotations you have got to a point beyond my own understanding of using rotations, perhaps someone more knowledgeable in this area can help. If there is anyone out there who is knowledgeable in this area please join in and give NEONLIGHT a hand. 3D mesh for point cloud? num_1274563620.html Processing Discourse/OpenGL and 3D Libraries num_1274563620.html Wed, 26 May 2010 11:28:04 +0000 One of the algorithms used in meshlab for reconstruction is the Poisson Reconstruction. You could find it here: http://www.cs.jhu.edu/~misha/Code/PoissonRecon/ (code and executable are provided in c++). For my experience, to get good smooth surfaces, Poisson Reconstruction is the most effective and is good at preserving details. Delaunay triangulation should be slower and might be problematic for a large number of points. Marching Cubes implementation seems to be a long standing request for processing. javax.media can't be resolved - Eclipse num_1274814383.html Processing Discourse/OpenGL and 3D Libraries num_1274814383.html webbjk@unk.edu (h4t) Tue, 25 May 2010 17:49:22 +0000 Figured it out! I did not include jogl.jar into my build path. That fixes it. 3d constraints with toxiclibs over a custom form num_1261988157.html Processing Discourse/OpenGL and 3D Libraries num_1261988157.html Fri, 21 May 2010 15:07:27 +0000 Wow, just when I thought toxiclibs couldn't get sweeter... Thanks for the update Nwallen. That totally did the trick. Funny cause I changed the other methods to getter / setters, but somehow overlooked the fact that Ray3D would be the same. candy still supported? num_1274364317.html Processing Discourse/OpenGL and 3D Libraries num_1274364317.html Thu, 20 May 2010 08:18:06 +0000 you dont need a library anymore. its included as PShape now <a href="http://processing.org/reference/PShape.html" target="_blank">http://processing.org/reference/PShape.html</a> jogl.jnlp in China.. num_1274341756.html Processing Discourse/OpenGL and 3D Libraries num_1274341756.html Thu, 20 May 2010 00:49:16 +0000 Hello, I have done some applets using opengl (3D). Currently I am in China and notice that these links are not accessible: http://download.java.net/media/applet-launcher/applet-launcher.jar, http://download.java.net/media/jogl/builds/archive/jsr-231-webstart-current/jogl.jar, http://download.java.net/media/gluegen/webstart/gluegen-rt.jar, http://download.java.net/media/jogl/builds/archive/jsr-231-webstart-current/jogl.jnlp After I tried to make a link to: applet-launcher.jar, jogl.jar, gluegen-rt.jar already exported with Processing and to the jogl.jnlp file I downloaded here: https://jogl.dev.java.net/webstart/jogl.jnlp But the certificate is not ok. I tried to sign it myself and found notes how to do it with the terminal on mac OS X on processing.org, but I didn't succeed. Do you have an idea for a solution for using the 3D applets with opengl also in China? Thank you! Stereo - Anaglyph / Active stereo rendering lib num_1267077302.html Processing Discourse/OpenGL and 3D Libraries num_1267077302.html Wed, 19 May 2010 12:19:01 +0000 Hi all. I have tried the library in versions 1.0.9 and 1.1, using windows XP, and I always get the error message: Code:<pre class="code">The package "stereo" does not exist. You might be missing a library. Note that release 1.0, libraries must be installed in a folder named 'libraries' inside the 'sketchbook' folder. </pre> As mentioned, I put the Stereo.jar in the libraries folder. Then tried to put it under a "stereo" folder. After seeing the error message I created a "libraries" folder in the sketchbook directory and put Stereo.jar in there as well. I have installed and used several libraries but never used a libraries folder in the sketchbook folder, always in the one inside processing. I have checked the dependencies stated in the project's homepage and both files were found in "libraries\opengl\library" folder under processing. I'm always testing with the AnaglyphTest sketch I don´t know what else can I try, hope you guys can help me. Thanks! Unsatisfied Link Error with jogl.dll num_1274022985.html Processing Discourse/OpenGL and 3D Libraries num_1274022985.html Wed, 19 May 2010 02:03:57 +0000 OpenGl does not work in general, also apps outside processing dont work. I am a little reluctant to update the drivers in such a box: I dont like adventures and I have a due date next week, so I will have to survive without opengl. <img src="yabbfiles/Templates/Forum/processing_one/sad.gif" border="0" alt="Sad" title="Sad" /> Thnx for your help.