def createLights(bb, rootStateSet):
lightGroup = osg.Group()
modelSize = bb.radius()
# create a spot light.
myLight1 = osg.Light()
myLight1.setLightNum(0)
myLight1.setPosition(osg.Vec4(bb.corner(4),1.0))
myLight1.setAmbient(osg.Vec4(1.0,0.0,0.0,1.0))
myLight1.setDiffuse(osg.Vec4(1.0,0.0,0.0,1.0))
myLight1.setSpotCutoff(20.0)
myLight1.setSpotExponent(50.0)
myLight1.setDirection(osg.Vec3(1.0,1.0,-1.0))
lightS1 = osg.LightSource()
lightS1.setLight(myLight1)
lightS1.setLocalStateSetModes(osg.StateAttribute.ON)
lightS1.setStateSetModes(*rootStateSet,osg.StateAttribute.ON)
lightGroup.addChild(lightS1)
# create a local light.
myLight2 = osg.Light()
myLight2.setLightNum(1)
myLight2.setPosition(osg.Vec4(0.0,0.0,0.0,1.0))
myLight2.setAmbient(osg.Vec4(0.0,1.0,1.0,1.0))
myLight2.setDiffuse(osg.Vec4(0.0,1.0,1.0,1.0))
myLight2.setConstantAttenuation(1.0)
myLight2.setLinearAttenuation(2.0/modelSize)
myLight2.setQuadraticAttenuation(2.0/osg.square(modelSize))
lightS2 = osg.LightSource()
lightS2.setLight(myLight2)
lightS2.setLocalStateSetModes(osg.StateAttribute.ON)
lightS2.setStateSetModes(*rootStateSet,osg.StateAttribute.ON)
mt = osg.MatrixTransform()
# set up the animation path
animationPath = osg.AnimationPath()
animationPath.insert(0.0,osg.AnimationPath.ControlPoint(bb.corner(0)))
animationPath.insert(1.0,osg.AnimationPath.ControlPoint(bb.corner(1)))
animationPath.insert(2.0,osg.AnimationPath.ControlPoint(bb.corner(2)))
animationPath.insert(3.0,osg.AnimationPath.ControlPoint(bb.corner(3)))
animationPath.insert(4.0,osg.AnimationPath.ControlPoint(bb.corner(4)))
animationPath.insert(5.0,osg.AnimationPath.ControlPoint(bb.corner(5)))
animationPath.insert(6.0,osg.AnimationPath.ControlPoint(bb.corner(6)))
animationPath.insert(7.0,osg.AnimationPath.ControlPoint(bb.corner(7)))
animationPath.insert(8.0,osg.AnimationPath.ControlPoint(bb.corner(0)))
animationPath.setLoopMode(osg.AnimationPath.SWING)
mt.setUpdateCallback(osg.AnimationPathCallback(animationPath))
def createSpotLightNode(position, direction, angle, lightNum, textureUnit):
group = osg.Group()
# create light source.
lightsource = osg.LightSource()
light = lightsource.getLight()
light.setLightNum(lightNum)
light.setPosition(osg.Vec4(position,1.0))
light.setAmbient(osg.Vec4(0.00,0.00,0.05,1.0))
light.setDiffuse(osg.Vec4(1.0,1.0,1.0,1.0))
group.addChild(lightsource)
# create tex gen.
up = osg.Vec3(0.0,0.0,1.0)
up = (direction ^ up) ^ direction
up.normalize()
texgenNode = osg.TexGenNode()
texgenNode.setTextureUnit(textureUnit)
texgen = texgenNode.getTexGen()
texgen.setMode(osg.TexGen.EYE_LINEAR)
texgen.setPlanesFromMatrix(osg.Matrixd.lookAt(position, position+direction, up)*
osg.Matrixd.perspective(angle,1.0,0.1,100)*
osg.Matrixd.translate(1.0,1.0,1.0)*
osg.Matrixd.scale(0.5,0.5,0.5))
group.addChild(texgenNode)
return group
texenv.setSource2_RGB(osg.TexEnvCombine.PRIMARY_COLOR)
texenv.setOperand2_RGB(osg.TexEnvCombine.SRC_COLOR)
stateset.setTextureAttribute( 1, texenv )
tex2d = osg.Texture2D( image )
tex2d.setWrap( osg.Texture.WRAP_S, osg.Texture.REPEAT )
tex2d.setWrap( osg.Texture.WRAP_T, osg.Texture.REPEAT )
stateset.setTextureAttributeAndModes( 1, tex2d, osg.StateAttribute.ON )
return( geodePlanet )
# end SolarSystem.createPlanet
osg.Group* SolarSystem.createSunLight()
sunLightSource = osg.LightSource()
sunLight = sunLightSource.getLight()
sunLight.setPosition( osg.Vec4( 0.0, 0.0, 0.0, 1.0 ) )
sunLight.setAmbient( osg.Vec4( 0.0, 0.0, 0.0, 1.0 ) )
sunLightSource.setLight( sunLight )
sunLightSource.setLocalStateSetModes( osg.StateAttribute.ON )
sunLightSource.getOrCreateStateSet().setMode(GL_LIGHTING, osg.StateAttribute.ON)
lightModel = osg.LightModel()
lightModel.setAmbientIntensity(osg.Vec4(0.0,0.0,0.0,1.0))
sunLightSource.getOrCreateStateSet().setAttribute(lightModel)
return sunLightSource