FGFS-4.1/OpenSceneGraph
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Fixed impostor bug introduced when new modelview matrix was moved entirely

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within the cull traversal/draw traversal. The impostor code has been adapted
to the new convention.
This commit is contained in:
Robert Osfield
2002-02-14 11:06:03 +00:00
parent e87f7cf853
commit f77afd4282
1 changed files with 16 additions and 46 deletions
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62
src/osgUtil/CullVisitor.cpp
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@@ -1309,37 +1309,15 @@ ImpostorSprite* CullVisitor::createImpostorSprite(Impostor& node)
}
Vec3 eye_world = _tvs->_eyePoint;
Vec3 center_world = bs.center()*(*matrix);
// no appropriate sprite has been found therefore need to create
// one for use.
// create the render to texture stage.
ref_ptr<RenderToTextureStage> rtts = new RenderToTextureStage;
// set up the camera, note, in world coordinates, as if
// at the root of the scene graph as in the cullvisitor's original.
// this is required since we are simply inheriting all the
// transforms above this impostor node, rather than creating
// a local version and starting with a clean slate. We could
// do this, but then lights and clipping planes would need to
// transformed accordingly. This way we avoid this.
Vec3 eye_world = _tvs->_eyePoint;
Vec3 center_world = bs.center();
if (matrix) center_world = center_world*(*matrix);
Vec3 lv_world = center_world-eye_world;
Vec3 side_world = lv_world ^ _tvs->_upVector;
Vec3 up_world = side_world ^ lv_world;
up_world.normalize();
ref_ptr<Camera> camera = new Camera;
camera->setLookAt(eye_world,center_world,up_world);
rtts->setCamera(camera.get());
// set up lighting.
// currently ignore lights in the scene graph itself..
// will do later.
@@ -1353,6 +1331,10 @@ ImpostorSprite* CullVisitor::createImpostorSprite(Impostor& node)
// set up to charge the same RenderStageLighting is the parent previous stage.
rtts->setRenderStageLighting(previous_stage->getRenderStageLighting());
osg::Camera* camera = new osg::Camera(*_camera);
rtts->setCamera(camera);
// record the render bin, to be restored after creation
// of the render to text
@@ -1361,24 +1343,19 @@ ImpostorSprite* CullVisitor::createImpostorSprite(Impostor& node)
// set the current renderbin to be the newly created stage.
_currentRenderBin = rtts.get();
// what shall we do about the cull view stack?
// need to craete a new _tvs and save the previous one.
// need to create a push a new _cvs to set up for new camera position.
ref_ptr<CullViewState> previous_tvs = _tvs;
_tvs = new CullViewState;
// store the previous camera setting
ref_ptr<const Camera> previous_camera = _camera;
Vec3 rotate_from = bs.center()-eye_local;
Vec3 rotate_to = getLookVectorLocal();
// sets up the _tvs to reflect the new camera.
setCamera(*camera);
osg::Matrix* rotate_matrix = new osg::Matrix(
osg::Matrix::translate(-eye_local)*
osg::Matrix::rotate(rotate_from,rotate_to)*
osg::Matrix::translate(eye_local));
// pushing the cull view state will update it so it takes
// into account the new camera orientation.
pushCullViewState();
pushCullViewState(rotate_matrix);
// what shall we do about the near far?
// we could need to save the near and far, or switch it off.
@@ -1425,14 +1402,9 @@ ImpostorSprite* CullVisitor::createImpostorSprite(Impostor& node)
_currentRenderBin = previousRenderBin;
// restore the previous _tvs and _cvs;
_tvs = previous_tvs;
popCullViewState();
// restore the previous camera.
_camera = previous_camera;
if (rtts->_renderGraphList.size()==0 && rtts->_bins.size()==0)
{
// getting to this point means that all the subgraph has been
@@ -1482,7 +1454,7 @@ ImpostorSprite* CullVisitor::createImpostorSprite(Impostor& node)
// adjust camera left,right,up,down to fit (in world coords)
#define USE_SPHERE_NEAR_FAR
//#define USE_SPHERE_NEAR_FAR
#ifdef USE_SPHERE_NEAR_FAR
Vec3 near_local ( center_local-lv_local*width );
@@ -1531,9 +1503,7 @@ ImpostorSprite* CullVisitor::createImpostorSprite(Impostor& node)
zfar = local_zfar;
}
float top = (top_world-center_world).length();
float right = (right_world-center_world).length();