| Line |
Branch |
Exec |
Source |
| 1 |
|
|
/* -*-c++-*- OpenSceneGraph Cookbook |
| 2 |
|
|
* Chapter 10 Recipe 7 |
| 3 |
|
|
* Author: Wang Rui <wangray84 at gmail dot com> |
| 4 |
|
|
*/ |
| 5 |
|
|
|
| 6 |
|
|
#include "point-intersector.hh" |
| 7 |
|
|
|
| 8 |
|
|
#include <osg/Geometry> |
| 9 |
|
|
#include <osg/TemplatePrimitiveFunctor> |
| 10 |
|
|
#include <osg/Version> |
| 11 |
|
|
|
| 12 |
|
|
namespace gepetto { |
| 13 |
|
|
namespace gui { |
| 14 |
|
|
|
| 15 |
|
✗ |
PointIntersector::PointIntersector() |
| 16 |
|
✗ |
: osgUtil::LineSegmentIntersector(MODEL, 0.0, 0.0), _pickBias(2.0f) {} |
| 17 |
|
|
|
| 18 |
|
✗ |
PointIntersector::PointIntersector(const osg::Vec3& start, const osg::Vec3& end) |
| 19 |
|
✗ |
: osgUtil::LineSegmentIntersector(start, end), _pickBias(2.0f) {} |
| 20 |
|
|
|
| 21 |
|
✗ |
PointIntersector::PointIntersector(CoordinateFrame cf, double x, double y) |
| 22 |
|
✗ |
: osgUtil::LineSegmentIntersector(cf, x, y), _pickBias(2.0f) {} |
| 23 |
|
|
|
| 24 |
|
✗ |
osgUtil::Intersector* PointIntersector::clone( |
| 25 |
|
|
osgUtil::IntersectionVisitor& iv) { |
| 26 |
|
✗ |
if (_coordinateFrame == MODEL && iv.getModelMatrix() == 0) { |
| 27 |
|
✗ |
osg::ref_ptr<PointIntersector> cloned = new PointIntersector(_start, _end); |
| 28 |
|
✗ |
cloned->_parent = this; |
| 29 |
|
✗ |
cloned->_pickBias = _pickBias; |
| 30 |
|
✗ |
return cloned.release(); |
| 31 |
|
|
} |
| 32 |
|
|
|
| 33 |
|
✗ |
osg::Matrix matrix; |
| 34 |
|
✗ |
switch (_coordinateFrame) { |
| 35 |
|
✗ |
case WINDOW: |
| 36 |
|
✗ |
if (iv.getWindowMatrix()) matrix.preMult(*iv.getWindowMatrix()); |
| 37 |
|
✗ |
if (iv.getProjectionMatrix()) matrix.preMult(*iv.getProjectionMatrix()); |
| 38 |
|
✗ |
if (iv.getViewMatrix()) matrix.preMult(*iv.getViewMatrix()); |
| 39 |
|
✗ |
if (iv.getModelMatrix()) matrix.preMult(*iv.getModelMatrix()); |
| 40 |
|
✗ |
break; |
| 41 |
|
✗ |
case PROJECTION: |
| 42 |
|
✗ |
if (iv.getProjectionMatrix()) matrix.preMult(*iv.getProjectionMatrix()); |
| 43 |
|
✗ |
if (iv.getViewMatrix()) matrix.preMult(*iv.getViewMatrix()); |
| 44 |
|
✗ |
if (iv.getModelMatrix()) matrix.preMult(*iv.getModelMatrix()); |
| 45 |
|
✗ |
break; |
| 46 |
|
✗ |
case VIEW: |
| 47 |
|
✗ |
if (iv.getViewMatrix()) matrix.preMult(*iv.getViewMatrix()); |
| 48 |
|
✗ |
if (iv.getModelMatrix()) matrix.preMult(*iv.getModelMatrix()); |
| 49 |
|
✗ |
break; |
| 50 |
|
✗ |
case MODEL: |
| 51 |
|
✗ |
if (iv.getModelMatrix()) matrix = *iv.getModelMatrix(); |
| 52 |
|
✗ |
break; |
| 53 |
|
|
} |
| 54 |
|
|
|
| 55 |
|
✗ |
osg::Matrix inverse = osg::Matrix::inverse(matrix); |
| 56 |
|
|
osg::ref_ptr<PointIntersector> cloned = |
| 57 |
|
✗ |
new PointIntersector(_start * inverse, _end * inverse); |
| 58 |
|
✗ |
cloned->_parent = this; |
| 59 |
|
✗ |
cloned->_pickBias = _pickBias; |
| 60 |
|
✗ |
return cloned.release(); |
| 61 |
|
|
} |
| 62 |
|
|
|
| 63 |
|
✗ |
void PointIntersector::intersect(osgUtil::IntersectionVisitor& iv, |
| 64 |
|
|
osg::Drawable* drawable) { |
| 65 |
|
|
osg::BoundingBox bb = |
| 66 |
|
|
#if OSG_VERSION_LESS_THAN(3, 3, 3) |
| 67 |
|
|
drawable->getBound(); |
| 68 |
|
|
#else |
| 69 |
|
✗ |
drawable->getBoundingBox(); |
| 70 |
|
|
#endif |
| 71 |
|
✗ |
bb.xMin() -= _pickBias; |
| 72 |
|
✗ |
bb.xMax() += _pickBias; |
| 73 |
|
✗ |
bb.yMin() -= _pickBias; |
| 74 |
|
✗ |
bb.yMax() += _pickBias; |
| 75 |
|
✗ |
bb.zMin() -= _pickBias; |
| 76 |
|
✗ |
bb.zMax() += _pickBias; |
| 77 |
|
|
|
| 78 |
|
✗ |
osg::Vec3d s(_start), e(_end); |
| 79 |
|
✗ |
if (!intersectAndClip(s, e, bb)) return; |
| 80 |
|
✗ |
if (iv.getDoDummyTraversal()) return; |
| 81 |
|
|
|
| 82 |
|
✗ |
osg::Geometry* geometry = drawable->asGeometry(); |
| 83 |
|
✗ |
if (geometry) { |
| 84 |
|
|
osg::Vec3Array* vertices = |
| 85 |
|
✗ |
dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray()); |
| 86 |
|
✗ |
if (!vertices) return; |
| 87 |
|
|
|
| 88 |
|
✗ |
osg::Vec3d dir = e - s; |
| 89 |
|
✗ |
double invLength = 1.0 / dir.length(); |
| 90 |
|
✗ |
for (unsigned int i = 0; i < vertices->size(); ++i) { |
| 91 |
|
✗ |
double distance = fabs((((*vertices)[i] - s) ^ dir).length()); |
| 92 |
|
✗ |
distance *= invLength; |
| 93 |
|
✗ |
if (_pickBias < distance) continue; |
| 94 |
|
|
|
| 95 |
|
✗ |
Intersection hit; |
| 96 |
|
✗ |
hit.ratio = distance; |
| 97 |
|
✗ |
hit.nodePath = iv.getNodePath(); |
| 98 |
|
✗ |
hit.drawable = drawable; |
| 99 |
|
✗ |
hit.matrix = iv.getModelMatrix(); |
| 100 |
|
✗ |
hit.localIntersectionPoint = (*vertices)[i]; |
| 101 |
|
✗ |
hit.primitiveIndex = i; |
| 102 |
|
✗ |
insertIntersection(hit); |
| 103 |
|
|
} |
| 104 |
|
|
} |
| 105 |
|
|
} |
| 106 |
|
|
|
| 107 |
|
|
} // namespace gui |
| 108 |
|
|
} // namespace gepetto |
| 109 |
|
|
|