Java Code Examples for processing.core.PMatrix3D#scale()

public PMatrix3D getProjection(){
  pg_shadowmap.updateProjmodelview();

  // 1) create shadowmap matrix, 
  //    to transform positions from camera-space to the shadowmap-space (light-space)
  PMatrix3D mat_shadow = new PMatrix3D();
  // ndc (shadowmap) -> normalized (shadowmap) 
  //         [-1,+1] -> [0,1]
  mat_shadow.scale(0.5f);
  mat_shadow.translate(1,1,1);

  // model (world) -> modelview (shadowmap) -> ndc (shadowmap)
  mat_shadow.apply(pg_shadowmap.projection);
  
  return mat_shadow;
}
 

public PMatrix3D getShadowmapMatrix(){
  // 1) create shadowmap matrix, 
  //    to transform positions from camera-space to the shadowmap-space (light-space)
  PMatrix3D mat_shadow = new PMatrix3D();
  // ndc (shadowmap) -> normalized (shadowmap) 
  //         [-1,+1] -> [0,1]
  mat_shadow.scale(0.5f);
  mat_shadow.translate(1,1,1);

  // model (world) -> modelview (shadowmap) -> ndc (shadowmap)
  mat_shadow.apply(pg_shadowmap.projmodelview);
  
  return mat_shadow;
}
 

public void applyTransformationTo(PMatrix3D matrix) {
    matrix.translate(sceneTranslate.x, sceneTranslate.y, sceneTranslate.z);
    matrix.rotateX(sceneRotateX);
    matrix.rotateY(sceneRotateY);
    matrix.rotateZ(sceneRotateZ);
    matrix.scale(sceneScale);
}
 

private void update(PMatrix3D newPos, int id) {
        PMatrix3D transfo = (PMatrix3D) transfos.get(id);
        fr.inria.papart.multitouch.OneEuroFilter filter[] = filters.get(id);

        if (filter == null) {
            transfo.set(newPos);
        } else {
            try {
                // Rotation
                transfo.m00 = (float) filter[0].filter(newPos.m00);
                transfo.m01 = (float) filter[1].filter(newPos.m01);
                transfo.m02 = (float) filter[2].filter(newPos.m02);
                transfo.m10 = (float) filter[3].filter(newPos.m10);
                transfo.m11 = (float) filter[4].filter(newPos.m11);
                transfo.m12 = (float) filter[5].filter(newPos.m12);
                transfo.m20 = (float) filter[6].filter(newPos.m20);
                transfo.m21 = (float) filter[7].filter(newPos.m21);
                transfo.m22 = (float) filter[8].filter(newPos.m22);

                // Translation
                transfo.m03 = (float) filter[9].filter(newPos.m03);
                transfo.m13 = (float) filter[10].filter(newPos.m13);
                transfo.m23 = (float) filter[11].filter(newPos.m23);
            } catch (Exception e) {
                System.out.println("Filtering error " + e);
            }
        }

//        float pageHeight = this.height;
        float pageHeight = markersFromSVG.getSheetHeight();

        // Invert the scales so that it fits Inkscape's view. 
        transfo.scale(1, -1, 1);
        transfo.translate(0, -pageHeight, 0);
    }
 

public void setup() {
  
  surface.setLocation(viewport_x, viewport_y);
  
  float SCENE_SCALE = 1000;
  
  // for screenshot
  capture = new DwFrameCapture(this, "examples/");
  
  font12 = createFont("../data/SourceCodePro-Regular.ttf", 12);

  cam = new PeasyCam(this, 0, 0, 0, SCENE_SCALE);
  perspective(60 * DEG_TO_RAD, width/(float)height, 2, SCENE_SCALE * 250);

  group_bulletbodies = createShape(GROUP);
  
  physics = new BPhysics(); // no bounding box
  physics.world.setGravity(new Vector3f(0, 0, -50));
 
  pg_render = (PGraphics3D) createGraphics(width, height, P3D);
  pg_render.smooth(0);
  pg_render.beginDraw();
  pg_render.endDraw();
  
  
  // compute scene bounding-sphere
  DwBoundingSphere scene_bs = new DwBoundingSphere();
  scene_bs.set(0, 0, 200, 450);
  PMatrix3D mat_bs = scene_bs.getUnitSphereMatrix();

  // matrix, to place (centering, scaling) the scene in the viewport
  mat_scene_view = new PMatrix3D();
  mat_scene_view.scale(SCENE_SCALE);
  mat_scene_view.apply(mat_bs);

  // matrix, to place the scene in the skylight renderer
  mat_scene_bounds = mat_scene_view.get();
  mat_scene_bounds.invert();
  mat_scene_bounds.preApply(mat_bs);

  // callback for rendering the scene
  DwSceneDisplay scene_display = new DwSceneDisplay(){
    @Override
    public void display(PGraphics3D canvas) {
      displayScene(canvas);  
    }
  };
  
  // library context
  context = new DwPixelFlow(this);
  context.print();
  context.printGL();
  
  // postprocessing filters
  filter = DwFilter.get(context);
  
  // init skylight renderer
  skylight = new DwSkyLight(context, scene_display, mat_scene_bounds);
  
  // parameters for sky-light
  skylight.sky.param.iterations     = 50;
  skylight.sky.param.solar_azimuth  = 0;
  skylight.sky.param.solar_zenith   = 0;
  skylight.sky.param.sample_focus   = 1; // full sphere sampling
  skylight.sky.param.intensity      = 1.0f;
  skylight.sky.param.rgb            = new float[]{1,1,1};
  skylight.sky.param.shadowmap_size = 512; // quality vs. performance
  
  // parameters for sun-light
  skylight.sun.param.iterations     = 50;
  skylight.sun.param.solar_azimuth  = 35;
  skylight.sun.param.solar_zenith   = 70;
  skylight.sun.param.sample_focus   = 0.1f;
  skylight.sun.param.intensity      = 1.0f;
  skylight.sun.param.rgb            = new float[]{1,1,1};
  skylight.sun.param.shadowmap_size = 512;
  
  // postprocessing AA
  smaa = new SMAA(context);
  pg_aa = (PGraphics3D) createGraphics(width, height, P3D);
  pg_aa.smooth(0);
  pg_aa.textureSampling(5);
  
  
  dof = new DepthOfField(context);
  geombuffer = new DwScreenSpaceGeometryBuffer(context, scene_display);
  
  pg_tmp = (PGraphics3D) createGraphics(width, height, P3D);
  pg_tmp.smooth(0);
  DwUtils.changeTextureFormat(pg_tmp, GL2.GL_RGBA16F, GL2.GL_RGBA, GL2.GL_FLOAT);

  // fresh start
  reset();
  
  createFractureShape();
  
  frameRate(60);
}
 

public void setup() {
  
  surface.setLocation(viewport_x, viewport_y);
  
  float SCENE_SCALE = 1000;
  
  // for screenshot
  capture = new DwFrameCapture(this, "examples/");
  
  font12 = createFont("../data/SourceCodePro-Regular.ttf", 12);

  cam = new PeasyCam(this, 0, 0, 0, SCENE_SCALE);
  perspective(60 * DEG_TO_RAD, width/(float)height, 2, SCENE_SCALE * 250);

  group_bulletbodies = createShape(GROUP);
  
  physics = new BPhysics(); // no bounding box
  physics.world.setGravity(new Vector3f(0, 0, -100));
 
  pg_render = (PGraphics3D) createGraphics(width, height, P3D);
  pg_render.smooth(0);
  pg_render.beginDraw();
  pg_render.endDraw();
  
  
  // compute scene bounding-sphere
  DwBoundingSphere scene_bs = new DwBoundingSphere();
  scene_bs.set(0, 0, 200, 450);
  PMatrix3D mat_bs = scene_bs.getUnitSphereMatrix();

  // matrix, to place (centering, scaling) the scene in the viewport
  mat_scene_view = new PMatrix3D();
  mat_scene_view.scale(SCENE_SCALE);
  mat_scene_view.apply(mat_bs);

  // matrix, to place the scene in the skylight renderer
  mat_scene_bounds = mat_scene_view.get();
  mat_scene_bounds.invert();
  mat_scene_bounds.preApply(mat_bs);

  // callback for rendering the scene
  DwSceneDisplay scene_display = new DwSceneDisplay(){
    @Override
    public void display(PGraphics3D canvas) {
      displayScene(canvas);  
    }
  };
  
  // library context
  context = new DwPixelFlow(this);
  context.print();
  context.printGL();
  
  // postprocessing filters
  filter = DwFilter.get(context);
  
  // init skylight renderer
  skylight = new DwSkyLight(context, scene_display, mat_scene_bounds);
  
  // parameters for sky-light
  skylight.sky.param.iterations     = 50;
  skylight.sky.param.solar_azimuth  = 0;
  skylight.sky.param.solar_zenith   = 0;
  skylight.sky.param.sample_focus   = 1; // full sphere sampling
  skylight.sky.param.intensity      = 1.0f;
  skylight.sky.param.rgb            = new float[]{1,1,1};
  skylight.sky.param.shadowmap_size = 512; // quality vs. performance
  
  // parameters for sun-light
  skylight.sun.param.iterations     = 50;
  skylight.sun.param.solar_azimuth  = 35;
  skylight.sun.param.solar_zenith   = 65;
  skylight.sun.param.sample_focus   = 0.1f;
  skylight.sun.param.intensity      = 1.0f;
  skylight.sun.param.rgb            = new float[]{1,1,1};
  skylight.sun.param.shadowmap_size = 512;
  
  // postprocessing AA
  smaa = new SMAA(context);
  pg_aa = (PGraphics3D) createGraphics(width, height, P3D);
  pg_aa.smooth(0);
  pg_aa.textureSampling(5);
  
  
  dof = new DepthOfField(context);
  geombuffer = new DwScreenSpaceGeometryBuffer(context, scene_display);
  
  pg_tmp = (PGraphics3D) createGraphics(width, height, P3D);
  pg_tmp.smooth(0);
  DwUtils.changeTextureFormat(pg_tmp, GL2.GL_RGBA16F, GL2.GL_RGBA, GL2.GL_FLOAT);


  // fresh start
  reset();
  
  createFractureShape();
  
  frameRate(60);
}
 

public void setup() {
  
  surface.setLocation(viewport_x, viewport_y);
  
  float SCENE_SCALE = 1000;
  
  // for screenshot
  capture = new DwFrameCapture(this, "examples/");
  
  font12 = createFont("../data/SourceCodePro-Regular.ttf", 12);

  cam = new PeasyCam(this, 0, 0, 0, SCENE_SCALE);
  perspective(60 * DEG_TO_RAD, width/(float)height, 2, SCENE_SCALE * 250);

  group_bulletbodies = createShape(GROUP);
  
  physics = new BPhysics(); // no bounding box
  physics.world.setGravity(new Vector3f(0, 0, -50));
 
  pg_render = (PGraphics3D) createGraphics(width, height, P3D);
  pg_render.smooth(0);
  pg_render.beginDraw();
  pg_render.endDraw();
  
  
  // compute scene bounding-sphere
  DwBoundingSphere scene_bs = new DwBoundingSphere();
  scene_bs.set(0, 0, 200, 450);
  PMatrix3D mat_bs = scene_bs.getUnitSphereMatrix();

  // matrix, to place (centering, scaling) the scene in the viewport
  mat_scene_view = new PMatrix3D();
  mat_scene_view.scale(SCENE_SCALE);
  mat_scene_view.apply(mat_bs);

  // matrix, to place the scene in the skylight renderer
  mat_scene_bounds = mat_scene_view.get();
  mat_scene_bounds.invert();
  mat_scene_bounds.preApply(mat_bs);

  // callback for rendering the scene
  DwSceneDisplay scene_display = new DwSceneDisplay(){
    @Override
    public void display(PGraphics3D canvas) {
      displayScene(canvas);  
    }
  };
  
  // library context
  context = new DwPixelFlow(this);
  context.print();
  context.printGL();
  
  // postprocessing filters
  filter = DwFilter.get(context);
  
  // init skylight renderer
  skylight = new DwSkyLight(context, scene_display, mat_scene_bounds);
  
  // parameters for sky-light
  skylight.sky.param.iterations     = 50;
  skylight.sky.param.solar_azimuth  = 0;
  skylight.sky.param.solar_zenith   = 0;
  skylight.sky.param.sample_focus   = 1; // full sphere sampling
  skylight.sky.param.intensity      = 1.0f;
  skylight.sky.param.rgb            = new float[]{1,1,1};
  skylight.sky.param.shadowmap_size = 512; // quality vs. performance
  
  // parameters for sun-light
  skylight.sun.param.iterations     = 50;
  skylight.sun.param.solar_azimuth  = 35;
  skylight.sun.param.solar_zenith   = 70;
  skylight.sun.param.sample_focus   = 0.1f;
  skylight.sun.param.intensity      = 1.0f;
  skylight.sun.param.rgb            = new float[]{1,1,1};
  skylight.sun.param.shadowmap_size = 512;
  
  // postprocessing AA
  smaa = new SMAA(context);
  pg_aa = (PGraphics3D) createGraphics(width, height, P3D);
  pg_aa.smooth(0);
  pg_aa.textureSampling(5);
  
  
  dof = new DepthOfField(context);
  geombuffer = new DwScreenSpaceGeometryBuffer(context, scene_display);
  
  pg_tmp = (PGraphics3D) createGraphics(width, height, P3D);
  pg_tmp.smooth(0);
  DwUtils.changeTextureFormat(pg_tmp, GL2.GL_RGBA16F, GL2.GL_RGBA, GL2.GL_FLOAT);

  // fresh start
  reset();
  
  createFractureShape();
  
  frameRate(60);
}
 

public void setup() {
  
  surface.setLocation(viewport_x, viewport_y);
  
  float SCENE_SCALE = 1000;
  
  // for screenshot
  capture = new DwFrameCapture(this, "examples/");
  
  font12 = createFont("../data/SourceCodePro-Regular.ttf", 12);

  cam = new PeasyCam(this, 0, 0, 0, SCENE_SCALE);
  perspective(60 * DEG_TO_RAD, width/(float)height, 2, SCENE_SCALE * 250);

  group_bulletbodies = createShape(GROUP);
  
  physics = new MyBPhysics(); // no bounding box
  physics.world.setGravity(new Vector3f(0, 0, -100));
 
  pg_render = (PGraphics3D) createGraphics(width, height, P3D);
  pg_render.smooth(0);
  pg_render.beginDraw();
  pg_render.endDraw();
  
  
  // compute scene bounding-sphere
  DwBoundingSphere scene_bs = new DwBoundingSphere();
  scene_bs.set(0, 0, 200, 450);
  PMatrix3D mat_bs = scene_bs.getUnitSphereMatrix();

  // matrix, to place (centering, scaling) the scene in the viewport
  mat_scene_view = new PMatrix3D();
  mat_scene_view.scale(SCENE_SCALE);
  mat_scene_view.apply(mat_bs);

  // matrix, to place the scene in the skylight renderer
  mat_scene_bounds = mat_scene_view.get();
  mat_scene_bounds.invert();
  mat_scene_bounds.preApply(mat_bs);

  // callback for rendering the scene
  DwSceneDisplay scene_display = new DwSceneDisplay(){
    @Override
    public void display(PGraphics3D canvas) {
      displayScene(canvas);  
    }
  };
  
  // library context
  context = new DwPixelFlow(this);
  context.print();
  context.printGL();
  
  // postprocessing filters
  filter = DwFilter.get(context);
  
  // init skylight renderer
  skylight = new DwSkyLight(context, scene_display, mat_scene_bounds);
  
  // parameters for sky-light
  skylight.sky.param.iterations     = 50;
  skylight.sky.param.solar_azimuth  = 0;
  skylight.sky.param.solar_zenith   = 0;
  skylight.sky.param.sample_focus   = 1; // full sphere sampling
  skylight.sky.param.intensity      = 1.0f;
  skylight.sky.param.rgb            = new float[]{1,1,1};
  skylight.sky.param.shadowmap_size = 512; // quality vs. performance
  
  // parameters for sun-light
  skylight.sun.param.iterations     = 50;
  skylight.sun.param.solar_azimuth  = 35;
  skylight.sun.param.solar_zenith   = 65;
  skylight.sun.param.sample_focus   = 0.1f;
  skylight.sun.param.intensity      = 1.0f;
  skylight.sun.param.rgb            = new float[]{1,1,1};
  skylight.sun.param.shadowmap_size = 512;
  
  // postprocessing AA
  smaa = new SMAA(context);
  pg_aa = (PGraphics3D) createGraphics(width, height, P3D);
  pg_aa.smooth(0);
  pg_aa.textureSampling(5);
  
  
  dof = new DepthOfField(context);
  geombuffer = new DwScreenSpaceGeometryBuffer(context, scene_display);
  
  pg_tmp = (PGraphics3D) createGraphics(width, height, P3D);
  pg_tmp.smooth(0);
  DwUtils.changeTextureFormat(pg_tmp, GL2.GL_RGBA16F, GL2.GL_RGBA, GL2.GL_FLOAT);
  
  // fresh start
  reset();
  
  createFractureShape();
  
  frameRate(60);
}
 

public void setup() {
    
    surface.setLocation(viewport_x, viewport_y);
    
    float SCENE_SCALE = 1000;
    
    capture = new DwFrameCapture(this, "examples/");
    
    font12 = createFont("../data/SourceCodePro-Regular.ttf", 12);
    font96 = createFont("../data/SourceCodePro-Regular.ttf", 32);
    
    cam = new PeasyCam(this, 0, 0, 0, SCENE_SCALE);
    perspective(60 * DEG_TO_RAD, width/(float)height, 2, SCENE_SCALE * 250);

    group_bulletbodies = createShape(GROUP);
    
//    Vector3f min = new Vector3f(-300, -300,    0);
//    Vector3f max = new Vector3f(+300, +300, +1000);
//    physics = new BPhysics(min, max);
    physics = new BPhysics(); // no bounding box
    physics.world.setGravity(new Vector3f(0, 0, -30));
   
    pg_render = (PGraphics3D) createGraphics(width, height, P3D);
    pg_render.smooth(0);
    pg_render.beginDraw();
    pg_render.endDraw();
    
    
    // compute scene bounding-sphere
    DwBoundingSphere scene_bs = new DwBoundingSphere();
    scene_bs.set(0, 0, 200, 450);
    PMatrix3D mat_bs = scene_bs.getUnitSphereMatrix();

    // matrix, to place (centering, scaling) the scene in the viewport
    mat_scene_view = new PMatrix3D();
    mat_scene_view.scale(SCENE_SCALE);
    mat_scene_view.apply(mat_bs);

    // matrix, to place the scene in the skylight renderer
    mat_scene_bounds = mat_scene_view.get();
    mat_scene_bounds.invert();
    mat_scene_bounds.preApply(mat_bs);

    // callback for rendering the scene
    DwSceneDisplay scene_display = new DwSceneDisplay(){
      @Override
      public void display(PGraphics3D canvas) {
        displayScene(canvas);  
      }
    };
    
    // library context
    context = new DwPixelFlow(this);
    context.print();
    context.printGL();
    
    // postprocessing filters
    filter = DwFilter.get(context);
    
    // init skylight renderer
    skylight = new DwSkyLight(context, scene_display, mat_scene_bounds);
    
    // parameters for sky-light
    skylight.sky.param.iterations     = 50;
    skylight.sky.param.solar_azimuth  = 0;
    skylight.sky.param.solar_zenith   = 0;
    skylight.sky.param.sample_focus   = 1; // full sphere sampling
    skylight.sky.param.intensity      = 1.0f;
    skylight.sky.param.rgb            = new float[]{1,1,1};
    skylight.sky.param.shadowmap_size = 512; // quality vs. performance
    
    // parameters for sun-light
    skylight.sun.param.iterations     = 50;
    skylight.sun.param.solar_azimuth  = 35;
    skylight.sun.param.solar_zenith   = 65;
    skylight.sun.param.sample_focus   = 0.1f;
    skylight.sun.param.intensity      = 1.0f;
    skylight.sun.param.rgb            = new float[]{1,1,1};
    skylight.sun.param.shadowmap_size = 512;
    
    // postprocessing AA
    smaa = new SMAA(context);
    pg_aa = (PGraphics3D) createGraphics(width, height, P3D);
    pg_aa.smooth(0);
    pg_aa.textureSampling(5);
    
    
    dof = new DepthOfField(context);
    geombuffer = new DwScreenSpaceGeometryBuffer(context, scene_display);
    
    pg_tmp = (PGraphics3D) createGraphics(width, height, P3D);
    pg_tmp.smooth(0);
    DwUtils.changeTextureFormat(pg_tmp, GL2.GL_RGBA16F, GL2.GL_RGBA, GL2.GL_FLOAT);
    
    // fresh start
    reset();
    createBuildings(BUILDING);
    frameRate(60);
  }
 

public void setup() {
    
    surface.setLocation(viewport_x, viewport_y);
    
    float SCENE_SCALE = 1000;
    
    capture = new DwFrameCapture(this, "examples/");
    font12 = createFont("../data/SourceCodePro-Regular.ttf", 12);

    cam = new PeasyCam(this, 0, 0, 0, SCENE_SCALE);
    perspective(60 * DEG_TO_RAD, width/(float)height, 2, SCENE_SCALE * 250);

    group_bulletbodies = createShape(GROUP);
    
//    Vector3f min = new Vector3f(-200, -200,    0);
//    Vector3f max = new Vector3f(+200, +200, +400);
//    physics = new BPhysics(min, max);
    physics = new BPhysics(); // no bounding box
    physics.world.setGravity(new Vector3f(0, 0, -300));
   
    pg_render = (PGraphics3D) createGraphics(width, height, P3D);
    pg_render.smooth(0);
    pg_render.beginDraw();
    pg_render.endDraw();
    
    
    // compute scene bounding-sphere
    DwBoundingSphere scene_bs = new DwBoundingSphere();
    scene_bs.set(0, 0, 200, 450);
    PMatrix3D mat_bs = scene_bs.getUnitSphereMatrix();

    // matrix, to place (centering, scaling) the scene in the viewport
    mat_scene_view = new PMatrix3D();
    mat_scene_view.scale(SCENE_SCALE);
    mat_scene_view.apply(mat_bs);

    // matrix, to place the scene in the skylight renderer
    mat_scene_bounds = mat_scene_view.get();
    mat_scene_bounds.invert();
    mat_scene_bounds.preApply(mat_bs);

    // callback for rendering the scene
    DwSceneDisplay scene_display = new DwSceneDisplay(){
      @Override
      public void display(PGraphics3D canvas) {
        displayScene(canvas);  
      }
    };
    
    // library context
    context = new DwPixelFlow(this);
    context.print();
    context.printGL();
    
    // postprocessing filters
    filter = DwFilter.get(context);
    
    // init skylight renderer
    skylight = new DwSkyLight(context, scene_display, mat_scene_bounds);
    
    // parameters for sky-light
    skylight.sky.param.iterations     = 50;
    skylight.sky.param.solar_azimuth  = 0;
    skylight.sky.param.solar_zenith   = 0;
    skylight.sky.param.sample_focus   = 1; // full sphere sampling
    skylight.sky.param.intensity      = 1.0f;
    skylight.sky.param.rgb            = new float[]{1,1,1};
    skylight.sky.param.shadowmap_size = 512; // quality vs. performance
    
    // parameters for sun-light
    skylight.sun.param.iterations     = 50;
    skylight.sun.param.solar_azimuth  = 35;
    skylight.sun.param.solar_zenith   = 65;
    skylight.sun.param.sample_focus   = 0.1f;
    skylight.sun.param.intensity      = 1.0f;
    skylight.sun.param.rgb            = new float[]{1,1,1};
    skylight.sun.param.shadowmap_size = 512;
    
    // postprocessing AA
    smaa = new SMAA(context);
    pg_aa = (PGraphics3D) createGraphics(width, height, P3D);
    pg_aa.smooth(0);
    pg_aa.textureSampling(5);
    
    
    dof = new DepthOfField(context);
    geombuffer = new DwScreenSpaceGeometryBuffer(context, scene_display);
    
    pg_tmp = (PGraphics3D) createGraphics(width, height, P3D);
    pg_tmp.smooth(0);
    DwUtils.changeTextureFormat(pg_tmp, GL2.GL_RGBA16F, GL2.GL_RGBA, GL2.GL_FLOAT);

    
    // fresh start
    reset();
    
    frameRate(60);
  }
 

public PMatrix3D getUnitSphereMatrix(){
  PMatrix3D mat = new PMatrix3D();
  mat.scale(1.0f/rad);
  mat.translate(-pos[0], -pos[1], -pos[2]);
  return mat;
}
 

/**
 * Init VR rendering. The VR rendering creates a 3D "screen". It is used to
 * create 3D pop-up effects.
 *
 * @param cam Rendering origin.
 * @param userPos Position of the user, relative to the PaperScreen
 * @param nearPlane Close disance for OpengL in millimeters.
 * @param farPlane Far distance for OpenGL in millimeters.
 * @param isAnaglyph Use Anaglyph.
 * @param isLeft When analygph is it left or right, ignored otherwise.
 */
public void initDraw(Camera cam, PVector userPos, float nearPlane, float farPlane, boolean isAnaglyph, boolean isLeft) {

    PGraphicsOpenGL graphics = getGraphics();

    if (initPosM == null) {
        this.isOpenGL = true;
        // Transformation  Camera -> Marker

        initPosM = this.getLocation(cam);

        initPosM.translate(this.getRenderingSizeX() / 2, this.getRenderingSizeY() / 2);
        // All is relative to the paper's center. not the corner. 
        initPosM.scale(-1, 1, 1);

    }

    // get the current transformation... 
    PMatrix3D newPos = this.getLocation(cam);

    newPos.translate(this.getRenderingSizeX() / 2, this.getRenderingSizeY() / 2);
    newPos.scale(-1, 1, 1);

    newPos.invert();
    newPos.apply(initPosM);

    PVector user = new PVector();

    if (isAnaglyph && isLeft) {
        userPos.add(-halfEyeDist * 2, 0, 0);
    }
    newPos.mult(userPos, user);
    PVector paperCameraPos = user;

    // Camera must look perpendicular to the screen. 
    graphics.camera(paperCameraPos.x, paperCameraPos.y, paperCameraPos.z,
            paperCameraPos.x, paperCameraPos.y, 0,
            0, 1, 0);

    // http://www.gamedev.net/topic/597564-view-and-projection-matrices-for-vr-window-using-head-tracking/
    float nearFactor = nearPlane / paperCameraPos.z;

    float left = nearFactor * (-drawingSize.x / 2f - paperCameraPos.x);
    float right = nearFactor * (drawingSize.x / 2f - paperCameraPos.x);
    float top = nearFactor * (drawingSize.y / 2f - paperCameraPos.y);
    float bottom = nearFactor * (-drawingSize.y / 2f - paperCameraPos.y);

    graphics.frustum(left, right, bottom, top, nearPlane, farPlane);
    graphics.projection.m11 = -graphics.projection.m11;

    // No detection?
    PMatrix3D transformation = this.getLocation(cam);
    if (transformation.m03 == 0 && transformation.m13 == 0 && transformation.m23 == 0) {
        resetPos();
    }
}
 

private void update(ARToolKitPlus.ARMultiMarkerInfoT multiMarkerConfig, int id) {
        fr.inria.papart.multitouch.OneEuroFilter filter[] = filters.get(id);

        PMatrix3D inputMatrix = new PMatrix3D();

        if (filter == null) {
            inputMatrix.m00 = multiMarkerConfig.trans().get(0);
            inputMatrix.m01 = multiMarkerConfig.trans().get(1);
            inputMatrix.m02 = multiMarkerConfig.trans().get(2);
            inputMatrix.m03 = multiMarkerConfig.trans().get(3);

            inputMatrix.m10 = multiMarkerConfig.trans().get(4);
            inputMatrix.m11 = multiMarkerConfig.trans().get(5);
            inputMatrix.m12 = multiMarkerConfig.trans().get(6);
            inputMatrix.m13 = multiMarkerConfig.trans().get(7);

            inputMatrix.m20 = multiMarkerConfig.trans().get(8);
            inputMatrix.m21 = multiMarkerConfig.trans().get(9);
            inputMatrix.m22 = multiMarkerConfig.trans().get(10);
            inputMatrix.m23 = multiMarkerConfig.trans().get(11);
        } else {
            try {
                inputMatrix.m00 = (float) filter[0].filter(multiMarkerConfig.trans().get(0));
                inputMatrix.m01 = (float) filter[1].filter(multiMarkerConfig.trans().get(1));
                inputMatrix.m02 = (float) filter[2].filter(multiMarkerConfig.trans().get(2));
                inputMatrix.m03 = (float) filter[3].filter(multiMarkerConfig.trans().get(3));

                inputMatrix.m10 = (float) filter[4].filter(multiMarkerConfig.trans().get(4));
                inputMatrix.m11 = (float) filter[5].filter(multiMarkerConfig.trans().get(5));
                inputMatrix.m12 = (float) filter[6].filter(multiMarkerConfig.trans().get(6));
                inputMatrix.m13 = (float) filter[7].filter(multiMarkerConfig.trans().get(7));

                inputMatrix.m20 = (float) filter[8].filter(multiMarkerConfig.trans().get(8));
                inputMatrix.m21 = (float) filter[9].filter(multiMarkerConfig.trans().get(9));
                inputMatrix.m22 = (float) filter[10].filter(multiMarkerConfig.trans().get(10));
                inputMatrix.m23 = (float) filter[11].filter(multiMarkerConfig.trans().get(11));
            } catch (Exception e) {
                System.out.println("Filtering error " + e);
            }
        }

//        inputMatrix.translate(0, height / 2, 0);
//        inputMatrix.scale(1, -1, 1);
//        inputMatrix.translate(0, -height / 2, 0);
        // Invert the scales so that it fits Inkscape's view. 
        
        inputMatrix.scale(1, -1, 1);
        inputMatrix.translate(0, -markerBoardSize.y, 0);

        PMatrix3D transfo = transfos.get(id);
        transfo.set(inputMatrix);
//    Z negation ?
//        tmp.scale(1, 1, -1);
//        transfo[11] = -transfo[11];
    }