def createViewer (self):
"""create a osgViewer.Viewer and set the viewport, camera and previously created graphical context """
viewer = osgViewer.Viewer()
viewer.getCamera().setViewport(osg.Viewport(0,0, self.width(), self.height()))
viewer.getCamera().setProjectionMatrixAsPerspective(30.0,float(self.width())/float(self.height()), 1.0, 10000.0)
if not self.gw:
raise Exception("GraphicsWindow not yet created")
viewer.getCamera().setGraphicsContext(self.gw)
return viewer
def resetCamera(self, viewer):
camera = viewer.getCamera()
camera.setComputeNearFarMode(False)
# camera = osg.Camera()
camera.setViewport(osg.Viewport(0, 0, self.width(), self.height()))
# camera.setReferenceFrame(osg.Transform.ABSOLUTE_RF)
CAMERA_ANGLE = 45.0
CAMERA_Z_TRANSLATE = 2.4142135623730949 #1.0 / math.tan(math.radians(CAMERA_ANGLE / 2.0))
cameraPosition = [0.0, 0.0, CAMERA_Z_TRANSLATE]
camera.setProjectionMatrixAsPerspective(
CAMERA_ANGLE,
float(self.width()) / float(self.height()), 0.1, 100.0)
eye = osg.Vec3d(cameraPosition[0], cameraPosition[1],
cameraPosition[2])
center = osg.Vec3d(0, 0, 0)
up = osg.Vec3d(0, 1, 0)
camera.setViewMatrixAsLookAt(eye, center, up)
camera.getOrCreateStateSet().setAttributeAndModes(
osg.BlendFunc(GL.GL_ONE, GL.GL_ONE_MINUS_SRC_ALPHA))
camera.getOrCreateStateSet().setMode(GL.GL_DEPTH_TEST, False)
camera.getOrCreateStateSet().setMode(GL.GL_DEPTH_WRITEMASK, False)
camera.getOrCreateStateSet().setMode(GL.GL_LIGHTING, False)
material = osg.Material()
color = osg.Vec4(1.0, 1.0, 1.0, 1.0)
material.setDiffuse(osg.Material.FRONT_AND_BACK, color)
material.setAmbient(osg.Material.FRONT_AND_BACK, color)
camera.getOrCreateStateSet().setAttributeAndModes(material)
camera.setClearColor(osg.Vec4(0, 0, 0, 0))
camera.setClearMask(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
camera.setCullMask(VISIBLE_CULL_MASK)
if not self.gw:
raise Exception("GraphicsWindow not yet created")
self.camera = camera
# viewer.getCamera().setViewport(osg.Viewport(0,0, self.width(), self.height()))
# viewer.getCamera().addChild(camera)
camera.setGraphicsContext(self.gw)
def camera_build(self):
texture = self.texture_build()
camera = osg.Camera()
camera.setViewport(osg.Viewport(0, 0, self.width(), self.height()))
camera.setReferenceFrame(osg.Transform.ABSOLUTE_RF)
camera.setRenderOrder(osg.Camera.PRE_RENDER)
camera.setRenderTargetImplementation(osg.Camera.FRAME_BUFFER_OBJECT)
camera.attach(osg.Camera.COLOR_BUFFER, texture, 0, 0, False, 0, 0)
CAMERA_ANGLE = 45.0
CAMERA_Z_TRANSLATE = 2.4142135623730949 #1.0 / math.tan(math.radians(CAMERA_ANGLE / 2.0))
cameraPosition = [0.0, 0.0, CAMERA_Z_TRANSLATE]
camera.setProjectionMatrixAsPerspective(
CAMERA_ANGLE,
float(self.width()) / float(self.height()), 0.1, 10000.0)
eye = osg.Vec3d(cameraPosition[0], cameraPosition[1],
cameraPosition[2])
center = osg.Vec3d(0, 0, 0)
up = osg.Vec3d(0, 1, 0)
camera.setViewMatrixAsLookAt(eye, center, up)
camera.getOrCreateStateSet().setAttributeAndModes(
osg.BlendFunc(GL.GL_ONE, GL.GL_ONE_MINUS_SRC_ALPHA))
camera.getOrCreateStateSet().setMode(GL.GL_DEPTH_TEST, False)
camera.getOrCreateStateSet().setMode(GL.GL_DEPTH_WRITEMASK, False)
camera.getOrCreateStateSet().setMode(GL.GL_LIGHTING, False)
material = osg.Material()
color = osg.Vec4(1.0, 1.0, 1.0, 1.0)
material.setDiffuse(osg.Material.FRONT_AND_BACK, color)
material.setAmbient(osg.Material.FRONT_AND_BACK, color)
camera.getOrCreateStateSet().setAttributeAndModes(material)
camera.setClearColor(osg.Vec4(0, 0, 0, 0))
camera.setClearMask(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
return camera, texture
def setup_osgwindow(self, x, y, width, height):
"""
pythonic alternative to setUpViewerAsEmbeddedInWindow
"""
self.traits = osg.GraphicsContext.Traits()
self.traits.x = x
self.traits.y = y
self.traits.width = width
self.traits.height = height
#stereo is possible:
# self.traits.quadBufferStereo = True
# self.traits.screenNum = 1
gw = osgViewer.GraphicsWindowEmbedded(self.traits)
self.viewer.getCamera().setViewport(osg.Viewport(0, 0, width, height))
self.viewer.getCamera().setProjectionMatrixAsPerspective(
30.0,
float(width) / float(height), 1.0, 10000.0)
self.viewer.getCamera().setGraphicsContext(gw)
return gw