Hi guys, 

Can anyone please clarify how to get this running on Windows?

Hi, 

Hi,

Does anyone know if it's possible to draw a simple line in SunflowAPIAPI.
The JavaDoc states that it inherits the line method from processing.core.PGraphics, but I cannot seem to get anything to render.
The SunflowAPIAPI.java has no mention of this type of simple function.

I've had a good go, but to no avail..

Is this because ray tracing is just shining light of surfaces, and there is none bouncing off of a 'line'?


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Hi!

I've been playing around with lighting in Toxiclibs, but am getting some low performance with the lighting of faces. Looking at the example below; the faces don't seem to be being lit smoothly as the cube moves. Is this something to do with the normals of the faces? I couldn't quite work out how to 'update' them (as you can see in the below (adapted from code by velvetkevorkian)).
Can anyone please advise as to how this may be possible?

1. 
   import processing.opengl.*;
   
   import toxi.geom.*;
   import toxi.geom.mesh.subdiv.*;
   import toxi.geom.mesh.*;
   import toxi.processing.*;
   
   ToxiclibsSupport tox;
   
   float rotx,roty= PI/4;
   
   WETriangleMesh mesh;
   
   void setup() {
     size(700, 700, OPENGL);
     tox= new ToxiclibsSupport(this);
     buildMesh();
     mesh.computeVertexNormals();
   }
   
   void draw() {
   
     translate(width/2,height/2,0);
     background(255);
     fill(255,0,0);
     strokeWeight(0.5);
     stroke(0);
     lights();
     rotateX(rotx);
     rotateY(roty);
     tox.mesh(mesh, true, 0);
     rotx+= 0.00510;
     roty+= 0.00620;
     mesh.computeFaceNormals();
     mesh.computeVertexNormals();
    
   }
   
   void buildMesh() {
     mesh=new WETriangleMesh();
     toxi.geom.AABB b;
     b=new toxi.geom.AABB(80);
     b.toMesh(mesh);
   }

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Hi,

I'm wondering if it's possible to use OpenGL & Sunflow together, at least with just the OPENGL renderer in Processing.

I've been reading Amnons great post over at: http://amnonp5.wordpress.com/2010/09/28/sunflow-processing/
It seems to hint that it may be possible, but is not clear if it definetly is, and if so how.

I went through the process on this page explaining how to get a basic scene running ( How to install SunflowAPIAPI and How to use SunflowAPIAPI (code example)) which seems quite convoluted, and there doesn't seem to be much Processing syntax in there.

Is this the process you have to go through to somehow get OpenGL running with Sunflow in Processing?

Any advice would be greatly appreciated. .

Thanks

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Hi,

Can anyone inform me why printing text to the screen is not working in GLGraphics?

I was looking at a previous version of the library which seemed to have GLFont functionality: -

http://codeanticode.wordpress.com/2010/02/04/glgraphics-0-9-3/#more-691

However the GLFont class doesn't seem to exist anymore.

Any help would be greatly appreciated. .


Btw: I am rendering the scene via a GLModel



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Hi,

When running a basic example in GLGraphics, I'm getting the below warnings in the output window:-

GLGraphics VERSION: 0.9.9.1
GL_ARB_geometry_shader4 extension not available
GL_ARB_texture_float extension not available
GL_EXT_framebuffer_multisample extension not available

Does this mean I am missing some functionalty from the library? VBO etc? It looks like the lights() commands don't appear to be working either and was wondering if that was related. .

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Hi,

I'm working on a project at the moment that I want to eventually bounce to video.

The project is due to get a lot more complex quite quickly, with the following types of processes:-

- a particle system

- some general drawing / rendering to screen

- and some other stuff not thought of yet :)

There's due to be quite a lot happening on screen at the same time, so am planning on using the power of OPENGL at some point. Everything needs to happen in real-time for audio synchronisation purposes.

I have read the warnings about the direct manipulation of the OPENGL object in Processing, and also the suggestion of using an external IDE, and using JOGL directly.

Does anybody have any comments on the above? (I have not used this lib yet, and consider myself to be an intermediate user of Processing).

I'm also planning to do some ray tracing once I have the audio synced, and can then re-run while rendering out.

Any comments welcome. .

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Hi,

I'm trying to show only some vertices by using stroke within a rotating cube. While I can partially get the effect by doing the below; it's not the effect I'm after (it 'fades' out too many). If anyone knows how I could show for example; only 1 vertex, or select which to show on an animated object, I'd be truely grateful. .

1. float rotx = PI/4;
   float roty = PI/4;
   
   void setup (){
    size(400,400,P3D);
    noFill();
   // stroke(0);
    shapeMode (CENTER);
    smooth();
   }
   
   void draw(){
     background(255);
     translate(width/2.0, height/2.0, -100);
     rotateX(rotx);
     rotateY(roty);
     scale(100);
     smooth();
     Cube();
     roty+=0.01;
     rotx+=0.02;
   }
    
    void Cube() {
     beginShape(QUADS);
       // +Z "front" face
       stroke(0);
       vertex(-1, -1,  1);
       stroke(255);
       vertex( 1, -1,  1);
       stroke(255);
       vertex( 1,  1,  1);
       stroke(255);
       vertex(-1,  1,  1);
     endShape();
    
     beginShape(QUADS);
       // -Z "back" face
   //    stroke(255);
       vertex( 1, -1, -1);
   //    stroke(0);
       vertex(-1, -1, -1);
       vertex(-1,  1, -1);
       vertex( 1,  1, -1);
     endShape();
     
     beginShape(QUADS);
       // +Y "bottom" face
       vertex(-1,  1,  1);
       vertex( 1,  1,  1);
       vertex( 1,  1, -1);
       vertex(-1,  1, -1);
     endShape();
     
     beginShape(QUADS);
       // -Y "top" face
       vertex(-1, -1, -1);
       vertex( 1, -1, -1);
       vertex( 1, -1,  1);
       vertex(-1, -1,  1);
     endShape();
     
     beginShape(QUADS);
       // +X "right" face
       vertex( 1, -1,  1);
       vertex( 1, -1, -1);
       vertex( 1,  1, -1);
       vertex( 1,  1,  1);
     endShape();
     
     beginShape(QUADS);
       // -X "left" face
       vertex(-1, -1, -1);
       vertex(-1, -1,  1);
       vertex(-1,  1,  1);
       vertex(-1,  1, -1);
     endShape();
   }
   

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Hi,

I've playing around with one of the Toxiclibs examples, and added some animation code.

The thing I'm really stumped about; is that on any computer other than the one it was created on, the below code acts very randomly (eg the millis conditional does not appear to be working).

It's very strange, and would welcome any insight into what's happening.. .

1. import java.util.Random;
   import processing.opengl.*;
   import toxi.processing.*;
   
   import toxi.geom.*;
   import toxi.geom.mesh.*;
   
   TriangleMesh mesh;
   boolean isFilled = true;
   float move = 0.1;
   boolean choose;
   Random choice = new Random();
   
   
   
   Vec3D offset = new Vec3D(); // NEW
   
   ToxiclibsSupport gfx;  // See PRocessing / P5 lib docs for this. Or google :)
   
   void setup() {
     size(680, 382, P3D); // can use OPENGL here :) imported already
     gfx = new ToxiclibsSupport(this);
     // create a mesh from the axis-aligned bounding box (AABB)
     mesh = (TriangleMesh)new AABB(new Vec3D(), 100).toMesh();
     // get first face/triangle of mesh
     Face f = mesh.faces.get(0);
     // extrude along positive Z axis and shrink to 25% of original size
     // shrinking is done by moving vertices towards centroid of the face
     // before extruding
     float shrink=0.25;
     Vec3D centroid = new Triangle3D(f.a, f.b, f.c).computeCentroid();
     Vec3D extrude = new Vec3D(0, 0, 30);
     Vec3D a = f.a.interpolateTo(centroid, 1-shrink).add(extrude);
     Vec3D b = f.b.interpolateTo(centroid, 1-shrink).add(extrude);
     Vec3D c = f.c.interpolateTo(centroid, 1-shrink).add(extrude);
     // begin by adding new side faces:
     // side A
     mesh.addFace(f.a, a, f.c);
     mesh.addFace(a, c, f.c);
     // side B
     mesh.addFace(f.a, b, a);
     mesh.addFace(f.a, f.b, b);
     // side C
     mesh.addFace(f.c, c, f.b);
     mesh.addFace(c, b, f.b);
     // remove original face
     mesh.faces.remove(0);
     // add new face as cap
     mesh.addFace(a, b, c);
     // update normals (for shading)
     mesh.computeVertexNormals();
   }
   
   void draw() {
     float m = millis();
     background(255);
     camera(width / 2 - mouseX, height / 2 - mouseY, 400, 0, 0, 0, 0, 1, 0);
     lights();
     if (!isFilled) {
       noFill();
       stroke(0);
       gfx.mesh(mesh, true, 10);
     }
     else {
       fill(192,192,192);
         noStroke();
       gfx.mesh(mesh, true, 10);
     }
    
     if (m % 1000 == 0){
       choose = choice.nextBoolean();
     }
     if (choose){
       offset.x = move;
     }
     else {
       offset.x = -move;
   //    println(m);
     } 
     if (m % 5000 == 0){
       move = 0.001;
     }
     move +=  0.002; 
     println(move);
     Face f = mesh.faces.get(mesh.faces.size() - 1);
     translateFace(f, offset);
   }
   
   
   
   void translateFace(Face f, Vec3D offset) {
     f.a.addSelf(offset);
     f.b.addSelf(offset);
     f.c.addSelf(offset);
     mesh.computeFaceNormals();
     mesh.computeVertexNormals();
   }
   

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Hi,

I could do with a hand with the best way to modify 3D shapes on the fly.

Creating basic shapes using begin and endShape() doesn't look too hard, but am not sure adding noise, randomisation, and dynamic movement to line vertices would be the best method.

The Hemesh library looks interesting ( http://www.wblut.com/2010/05/04/hemesh-a-3d-mesh-library-for-processing/), as here you can get some nice modified object complexity, without too much effort. It's just not clear to me how to, for example, extrude just an edge, and play around with that. I was looking at the extrude class but couldn't get a result (see below).

[Moderator's note: removed useless, oversized and unreadable image of a JavaDoc page. A simple copy/paste of the textual information or just a link would be more useful.]

There is also the Hemesh GUI tool, that lets you export to a stl file. I understand the unlekkerLib allows you to import these, but again am not sure how much dynsmic control you have over the shape in P5.

Essestially I want to make large and small modifications to shapes so they can be animated. I have tried using another class that adds noise to all Hemesh vertices but this was just a little too random.

Hello,

Good day, 

Hi there,