ada7f622d7
This seems to be accepted OSG usage for slave cameras. It's possible that this order is important for rendering instruments that use RTT textures on systems without frame buffer object support. I'm thinking that the resulting bugs may be implicated in the "black rectangle" problem.
116 lines
3.8 KiB
C++
116 lines
3.8 KiB
C++
// redout.hxx
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//
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// Written by Mathias Froehlich,
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//
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// Copyright (C) 2007 Mathias Froehlich
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "redout.hxx"
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#include <assert.h>
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#include <osg/BlendFunc>
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#include <osg/Depth>
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#include <osg/Geometry>
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#include <osg/Geode>
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#include <osg/Switch>
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#include <osg/StateSet>
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#include <simgear/props/props.hxx>
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#include <Main/fg_props.hxx>
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class FGRedoutCallback : public osg::NodeCallback {
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public:
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FGRedoutCallback(osg::Vec4Array* colorArray) :
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_colorArray(colorArray),
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_redoutNode(fgGetNode("/sim/rendering/redout", true))
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{
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fgGetNode("/sim/rendering/redout/alpha", true);
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}
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virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
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{
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assert(dynamic_cast<osg::Switch*>(node));
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osg::Switch* sw = static_cast<osg::Switch*>(node);
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// Check if we need to do something further ...
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float alpha = _redoutNode->getFloatValue("alpha", 0);
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bool enabled = (0 < alpha);
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sw->setValue(0, enabled);
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if (!enabled)
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return;
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(*_colorArray)[0][0] = _redoutNode->getFloatValue("red", 1);
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(*_colorArray)[0][1] = _redoutNode->getFloatValue("green", 0);
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(*_colorArray)[0][2] = _redoutNode->getFloatValue("blue", 0);
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(*_colorArray)[0][3] = alpha;
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_colorArray->dirty();
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}
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private:
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osg::ref_ptr<osg::Vec4Array> _colorArray;
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SGSharedPtr<SGPropertyNode> _redoutNode;
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};
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osg::Node* FGCreateRedoutNode()
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{
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osg::Geometry* geometry = new osg::Geometry;
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geometry->setUseDisplayList(false);
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osg::StateSet* stateSet = geometry->getOrCreateStateSet();
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stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
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stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
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stateSet->setAttribute(new osg::BlendFunc);
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stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
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stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
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stateSet->setAttribute(new osg::Depth(osg::Depth::ALWAYS, 0, 1, false));
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stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
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osg::Vec3Array* vertexArray = new osg::Vec3Array;
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vertexArray->push_back(osg::Vec3(-1, -1, 0));
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vertexArray->push_back(osg::Vec3( 1, -1, 0));
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vertexArray->push_back(osg::Vec3( 1, 1, 0));
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vertexArray->push_back(osg::Vec3(-1, 1, 0));
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geometry->setVertexArray(vertexArray);
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osg::Vec4Array* colorArray = new osg::Vec4Array;
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colorArray->push_back(osg::Vec4(1, 0, 0, 1));
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geometry->setColorArray(colorArray);
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geometry->setColorBinding(osg::Geometry::BIND_OVERALL);
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geometry->addPrimitiveSet(new osg::DrawArrays(GL_POLYGON, 0, 4));
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(geometry);
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osg::Camera* camera = new osg::Camera;
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camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
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camera->setProjectionMatrix(osg::Matrix::ortho2D(-1, 1, -1, 1));
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camera->setViewMatrix(osg::Matrix::identity());
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camera->setRenderOrder(osg::Camera::POST_RENDER, 99);
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camera->setClearMask(0);
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camera->setAllowEventFocus(false);
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camera->setCullingActive(false);
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camera->addChild(geode);
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osg::Switch* sw = new osg::Switch;
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sw->setUpdateCallback(new FGRedoutCallback(colorArray));
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sw->addChild(camera);
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return sw;
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}
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