/**
* Copyright (c) 2008-2012 Ardor Labs, Inc.
*
* This file is part of Ardor3D.
*
* Ardor3D is free software: you can redistribute it and/or modify it
* under the terms of its license which may be found in the accompanying
* LICENSE file or at <http://www.ardor3d.com/LICENSE>.
*/
package com.ardor3d.extension.interact.widget;
import java.util.concurrent.atomic.AtomicBoolean;
import com.ardor3d.extension.interact.InteractManager;
import com.ardor3d.framework.Canvas;
import com.ardor3d.input.ButtonState;
import com.ardor3d.input.MouseState;
import com.ardor3d.input.logical.TwoInputStates;
import com.ardor3d.math.MathUtils;
import com.ardor3d.math.Matrix3;
import com.ardor3d.math.Plane;
import com.ardor3d.math.Transform;
import com.ardor3d.math.Vector2;
import com.ardor3d.math.Vector3;
import com.ardor3d.math.type.ReadOnlyColorRGBA;
import com.ardor3d.renderer.Camera;
import com.ardor3d.renderer.Renderer;
import com.ardor3d.renderer.queue.RenderBucketType;
import com.ardor3d.renderer.state.BlendState;
import com.ardor3d.renderer.state.ZBufferState;
import com.ardor3d.renderer.state.ZBufferState.TestFunction;
import com.ardor3d.scenegraph.Node;
import com.ardor3d.scenegraph.Spatial;
import com.ardor3d.scenegraph.shape.Cylinder;
public class MovePlanarWidget extends AbstractInteractWidget {
public static double MIN_SCALE = 0.000001;
protected MovePlane _plane = MovePlane.XZ;
public enum MovePlane {
XY, XZ, YZ
}
public MovePlanarWidget() {
_handle = new Node("moveHandle");
final BlendState blend = new BlendState();
blend.setBlendEnabled(true);
_handle.setRenderState(blend);
final ZBufferState zstate = new ZBufferState();
zstate.setFunction(TestFunction.LessThanOrEqualTo);
_handle.setRenderState(zstate);
_handle.getSceneHints().setRenderBucketType(RenderBucketType.Transparent);
_handle.updateGeometricState(0);
}
public MovePlanarWidget withDefaultHandle(final double radius, final double height, final ReadOnlyColorRGBA color) {
final Cylinder handle = new Cylinder("handle", 2, 16, radius, height, true);
handle.setDefaultColor(color);
switch (_plane) {
case XZ:
handle.setRotation(new Matrix3().fromAngleNormalAxis(MathUtils.HALF_PI, Vector3.UNIT_X));
break;
case YZ:
handle.setRotation(new Matrix3().fromAngleNormalAxis(MathUtils.HALF_PI, Vector3.UNIT_Y));
break;
default:
// do nothing
break;
}
handle.updateModelBound();
withHandle(handle);
return this;
}
public MovePlanarWidget withPlane(final MovePlane plane) {
_plane = plane;
return this;
}
public MovePlanarWidget withHandle(final Spatial handle) {
_handle.attachChild(handle);
return this;
}
@Override
public void targetChanged(final InteractManager manager) {
if (_dragging) {
endDrag(manager);
}
final Spatial target = manager.getSpatialTarget();
if (target != null) {
_handle.setScale(Math.max(MovePlanarWidget.MIN_SCALE, target.getWorldBound().getRadius()
+ target.getWorldTranslation().subtract(target.getWorldBound().getCenter(), _calcVec3A).length()));
}
targetDataUpdated(manager);
}
@Override
public void targetDataUpdated(final InteractManager manager) {
final Spatial target = manager.getSpatialTarget();
if (target == null) {
_handle.setScale(1.0);
_handle.setRotation(Matrix3.IDENTITY);
} else {
// update scale of widget using bounding radius
target.updateGeometricState(0);
// update arrow rotations from target
if (_interactMatrix == InteractMatrix.Local) {
_handle.setRotation(target.getWorldRotation());
} else {
_handle.setRotation(Matrix3.IDENTITY);
}
}
}
@Override
public void render(final Renderer renderer, final InteractManager manager) {
final Spatial spat = manager.getSpatialTarget();
if (spat == null) {
return;
}
_handle.setTranslation(spat.getWorldTranslation());
_handle.updateGeometricState(0);
renderer.draw(_handle);
}
@Override
public void processInput(final Canvas source, final TwoInputStates inputStates, final AtomicBoolean inputConsumed,
final InteractManager manager) {
// Make sure we have something to modify
if (manager.getSpatialTarget() == null) {
return;
}
// Make sure we are dragging.
final MouseState current = inputStates.getCurrent().getMouseState();
final MouseState previous = inputStates.getPrevious().getMouseState();
if (current.getButtonState(_dragButton) != ButtonState.DOWN) {
if (_dragging) {
endDrag(manager);
}
return;
}
// if we're already dragging, make sure we only act on drags that started with a positive pick.
else if (!current.getButtonsPressedSince(previous).contains(_dragButton) && !_dragging) {
return;
}
final Camera camera = source.getCanvasRenderer().getCamera();
final Vector2 oldMouse = new Vector2(previous.getX(), previous.getY());
// Make sure we are dragging over the handle
if (!_dragging) {
findPick(oldMouse, camera);
final Vector3 lastPick = getLastPick();
if (lastPick == null) {
return;
} else {
beginDrag(manager);
}
}
// we've established that our mouse is being held down, and started over our arrow. So consume.
inputConsumed.set(true);
// check if we've moved at all
if (current == previous || current.getDx() == 0 && current.getDy() == 0) {
return;
}
// act on drag
final Spatial picked = (Spatial) _results.getPickData(0).getTarget();
if (picked != null) {
final Vector3 loc = getNewOffset(oldMouse, current, camera, manager);
final Transform transform = manager.getSpatialState().getTransform();
transform.setTranslation(loc.addLocal(transform.getTranslation()));
// apply our filters, if any, now that we've made updates.
applyFilters(manager);
}
}
protected Vector3 getNewOffset(final Vector2 oldMouse, final MouseState current, final Camera camera,
final InteractManager manager) {
// calculate a plane
_calcVec3A.set(_handle.getWorldTranslation());
switch (_plane) {
case XY:
_calcVec3B.set(Vector3.UNIT_X);
_calcVec3C.set(Vector3.UNIT_Y);
break;
case XZ:
_calcVec3B.set(Vector3.UNIT_X);
_calcVec3C.set(Vector3.UNIT_Z);
break;
case YZ:
_calcVec3B.set(Vector3.UNIT_Y);
_calcVec3C.set(Vector3.UNIT_Z);
break;
}
// rotate to arrow plane
_handle.getRotation().applyPost(_calcVec3B, _calcVec3B);
_handle.getRotation().applyPost(_calcVec3C, _calcVec3C);
// make plane object
final Plane pickPlane = new Plane().setPlanePoints(_calcVec3A, _calcVec3B.addLocal(_calcVec3A),
_calcVec3C.addLocal(_calcVec3A));
// find out where we were hitting the plane before
getPickRay(oldMouse, camera);
if (!_calcRay.intersectsPlane(pickPlane, _calcVec3A)) {
return _calcVec3A.zero();
}
// find out where we are hitting the plane now
getPickRay(new Vector2(current.getX(), current.getY()), camera);
if (!_calcRay.intersectsPlane(pickPlane, _calcVec3B)) {
return _calcVec3A.zero();
}
// convert to target coord space
final Node parent = manager.getSpatialTarget().getParent();
if (parent != null) {
parent.getWorldTransform().applyInverse(_calcVec3A);
parent.getWorldTransform().applyInverse(_calcVec3B);
}
return _calcVec3B.subtractLocal(_calcVec3A);
}
}