How to use

getViewportTranform

method

in

org.jbox2d.callbacks.DebugDraw

 public void drawTree(DebugDraw argDraw, DynamicTreeNode node, int spot, int height) {
  node.aabb.getVertices(drawVecs);

  color.set(1, (height - spot) * 1f / height, (height - spot) * 1f / height);
  argDraw.drawPolygon(drawVecs, 4, color);

  argDraw.getViewportTranform().getWorldToScreen(node.aabb.upperBound, textVec);
  argDraw.drawString(textVec.x, textVec.y, node.id + "-" + (spot + 1) + "/" + height, color);

  if (node.child1 != null) {
   drawTree(argDraw, node.child1, spot + 1, height);
  }
  if (node.child2 != null) {
   drawTree(argDraw, node.child2, spot + 1, height);
  }
 }
}

 public void drawTree(DebugDraw argDraw, int node, int spot, int height) {
  AABB a = m_aabb[node];
  a.getVertices(drawVecs);

  color.set(1, (height - spot) * 1f / height, (height - spot) * 1f / height);
  argDraw.drawPolygon(drawVecs, 4, color);

  argDraw.getViewportTranform().getWorldToScreen(a.upperBound, textVec);
  argDraw.drawString(textVec.x, textVec.y, node + "-" + (spot + 1) + "/" + height, color);

  int c1 = m_child1[node];
  int c2 = m_child2[node];
  if (c1 != NULL_NODE) {
   drawTree(argDraw, c1, spot + 1, height);
  }
  if (c2 != NULL_NODE) {
   drawTree(argDraw, c2, spot + 1, height);
  }
 }
}

 public void drawTree(DebugDraw argDraw, DynamicTreeNode node, int spot, int height) {
  node.aabb.getVertices(drawVecs);

  color.set(1, (height - spot) * 1f / height, (height - spot) * 1f / height);
  argDraw.drawPolygon(drawVecs, 4, color);

  argDraw.getViewportTranform().getWorldToScreen(node.aabb.upperBound, textVec);
  argDraw.drawString(textVec.x, textVec.y, node.id + "-" + (spot + 1) + "/" + height, color);

  if (node.child1 != null) {
   drawTree(argDraw, node.child1, spot + 1, height);
  }
  if (node.child2 != null) {
   drawTree(argDraw, node.child2, spot + 1, height);
  }
 }
}

 public void drawTree(DebugDraw argDraw, int node, int spot, int height) {
  AABB a = m_aabb[node];
  a.getVertices(drawVecs);

  color.set(1, (height - spot) * 1f / height, (height - spot) * 1f / height);
  argDraw.drawPolygon(drawVecs, 4, color);

  argDraw.getViewportTranform().getWorldToScreen(a.upperBound, textVec);
  argDraw.drawString(textVec.x, textVec.y, node + "-" + (spot + 1) + "/" + height, color);

  int c1 = m_child1[node];
  int c2 = m_child2[node];
  if (c1 != NULL_NODE) {
   drawTree(argDraw, c1, spot + 1, height);
  }
  if (c2 != NULL_NODE) {
   drawTree(argDraw, c2, spot + 1, height);
  }
 }
}

public void setCamera(Vec2 argPos) {
 model.getDebugDraw().getViewportTranform().setCenter(argPos);
}

 @Override
 public void mouseDragged(MouseEvent e) {
  if (!drag) {
   return;
  }
  TestbedTest currTest = model.getCurrTest();
  if (currTest == null) {
   return;
  }
  Vec2 diff = new Vec2(e.getX(), e.getY());
  diff.subLocal(dragginMouse);
  currTest.getDebugDraw().getViewportTranform().getScreenVectorToWorld(diff, diff);
  currTest.getDebugDraw().getViewportTranform().getCenter().subLocal(diff);
  dragginMouse.set(e.getX(), e.getY());
 }
});

 public void mouseWheelMoved(MouseWheelEvent e) {
  DebugDraw d = draw;
  int notches = e.getWheelRotation();
  TestbedTest currTest = model.getCurrTest();
  if (currTest == null) {
   return;
  }
  OBBViewportTransform trans = (OBBViewportTransform) d.getViewportTranform();
  oldCenter.set(model.getCurrTest().getWorldMouse());
  // Change the zoom and clamp it to reasonable values - can't clamp now.
  if (notches < 0) {
   trans.mulByTransform(upScale);
   currTest.setCachedCameraScale(currTest.getCachedCameraScale() * ZOOM_IN_SCALE);
  } else if (notches > 0) {
   trans.mulByTransform(downScale);
   currTest.setCachedCameraScale(currTest.getCachedCameraScale() * ZOOM_OUT_SCALE);
  }
  d.getScreenToWorldToOut(model.getMouse(), newCenter);
  Vec2 transformedMove = oldCenter.subLocal(newCenter);
  d.getViewportTranform().setCenter(
    d.getViewportTranform().getCenter().addLocal(transformedMove));
  currTest.setCachedCameraPos(d.getViewportTranform().getCenter());
 }
});

public void mouseDragged(MouseEvent e) {
 pos.set(e.getX(), e.getY());
 if (e.getButton() == MouseEvent.BUTTON3) {
  posDif.set(model.getMouse());
  model.setMouse(pos);
  posDif.subLocal(pos);
  if(!model.getDebugDraw().getViewportTranform().isYFlip()){
   posDif.y *= -1;
  }
  model.getDebugDraw().getViewportTranform().getScreenVectorToWorld(posDif, posDif);
  model.getDebugDraw().getViewportTranform().getCenter().addLocal(posDif);
  if (model.getCurrTest() != null) {
   model.getCurrTest().setCachedCameraPos(
     model.getDebugDraw().getViewportTranform().getCenter());
  }
 }
 if (model.getCurrTest() != null) {
  model.setMouse(pos);
  model.getDebugDraw().getScreenToWorldToOut(pos, pos);
  model.getCurrTest().queueMouseMove(pos);
 }
}

public void drawTree(DebugDraw argDraw, DynamicTreeNode node, int spot, int height) {
 node.aabb.getVertices(drawVecs);
 color.set(1, (height - spot) * 1f / height, (height - spot) * 1f / height);
 argDraw.drawPolygon(drawVecs, 4, color);
 argDraw.getViewportTranform().getWorldToScreen(node.aabb.upperBound, textVec);
 argDraw.drawString(textVec.x, textVec.y, node.id + "-" + (spot + 1) + "/" + height, color);
 if (node.child1 != null) {
  drawTree(argDraw, node.child1, spot + 1, height);
 }
 if (node.child2 != null) {
  drawTree(argDraw, node.child2, spot + 1, height);
 }
}

  public void drawTree(DebugDraw argDraw, DynamicTreeNode node, int spot, int height) {
    node.aabb.getVertices(drawVecs);

    Color color = Color.color(1, (height - spot) * 1f / height, (height - spot) * 1f / height);
    argDraw.drawPolygon(drawVecs, 4, color);

    argDraw.getViewportTranform().getWorldToScreen(node.aabb.upperBound, textVec);
    argDraw.drawString(textVec.x, textVec.y, node.id + "-" + (spot + 1) + "/" + height, color);

    if (node.child1 != null) {
      drawTree(argDraw, node.child1, spot + 1, height);
    }
    if (node.child2 != null) {
      drawTree(argDraw, node.child2, spot + 1, height);
    }
  }
}

 public void drawTree(DebugDraw argDraw, DynamicTreeNode node, int spot, int height) {
  node.aabb.getVertices(drawVecs);

  color.set(1, (height - spot) * 1f / height, (height - spot) * 1f / height);
  argDraw.drawPolygon(drawVecs, 4, color);

  argDraw.getViewportTranform().getWorldToScreen(node.aabb.upperBound, textVec);
  argDraw.drawString(textVec.x, textVec.y, node.id + "-" + (spot + 1) + "/" + height, color);

  if (node.child1 != null) {
   drawTree(argDraw, node.child1, spot + 1, height);
  }
  if (node.child2 != null) {
   drawTree(argDraw, node.child2, spot + 1, height);
  }
 }
}

  public void drawTree(DebugDraw argDraw, int node, int spot, int height) {
    AABB a = m_aabb[node];
    a.getVertices(drawVecs);

    Color color = Color.color(1, (height - spot) * 1f / height, (height - spot) * 1f / height);
    argDraw.drawPolygon(drawVecs, 4, color);

    argDraw.getViewportTranform().getWorldToScreen(a.upperBound, textVec);
    argDraw.drawString(textVec.x, textVec.y, node + "-" + (spot + 1) + "/" + height, color);

    int c1 = m_child1[node];
    int c2 = m_child2[node];
    if (c1 != NULL_NODE) {
      drawTree(argDraw, c1, spot + 1, height);
    }
    if (c2 != NULL_NODE) {
      drawTree(argDraw, c2, spot + 1, height);
    }
  }
}

 public void drawTree(DebugDraw argDraw, int node, int spot, int height) {
  AABB a = m_aabb[node];
  a.getVertices(drawVecs);

  color.set(1, (height - spot) * 1f / height, (height - spot) * 1f / height);
  argDraw.drawPolygon(drawVecs, 4, color);

  argDraw.getViewportTranform().getWorldToScreen(a.upperBound, textVec);
  argDraw.drawString(textVec.x, textVec.y, node + "-" + (spot + 1) + "/" + height, color);

  int c1 = m_child1[node];
  int c2 = m_child2[node];
  if (c1 != NULL_NODE) {
   drawTree(argDraw, c1, spot + 1, height);
  }
  if (c2 != NULL_NODE) {
   drawTree(argDraw, c2, spot + 1, height);
  }
 }
}