def _makeFullscreenCam(self):
bufferCam = Camera("BufferCamera")
lens = OrthographicLens()
lens.setFilmSize(2, 2)
lens.setFilmOffset(0, 0)
lens.setNearFar(-1000, 1000)
bufferCam.setLens(lens)
bufferCam.setCullBounds(OmniBoundingVolume())
return bufferCam
def _makeFullscreenCam(self):
""" Create a orthographic camera for this buffer """
bufferCam = Camera("BufferCamera")
lens = OrthographicLens()
lens.setFilmSize(2, 2)
lens.setFilmOffset(0, 0)
lens.setNearFar(-1000, 1000)
bufferCam.setLens(lens)
bufferCam.setCullBounds(OmniBoundingVolume())
return bufferCam
class LightManager(DebugObject):
""" This class is internally used by the RenderingPipeline to handle
Lights and their Shadows. It stores a list of lights, and updates the
required ShadowSources per frame. There are two main update methods:
updateLights processes each light and does a basic frustum check.
If the light is in the frustum, its ID is passed to the light precompute
container (set with setLightingCuller). Also, each shadowSource of
the light is checked, and if it reports to be invalid, it's queued to
the list of queued shadow updates.
updateShadows processes the queued shadow updates and setups everything
to render the shadow depth textures to the shadow atlas.
Lights can be added with addLight. Notice you cannot change the shadow
resolution or wether the light casts shadows after you called addLight.
This is because it might already have a position in the atlas, and so
the atlas would have to delete it's map, which is not supported (yet).
This shouldn't be an issue, as you usually always know before if a
light will cast shadows or not.
"""
def __init__(self, pipeline):
""" Creates a new LightManager. It expects a RenderPipeline as parameter. """
DebugObject.__init__(self, "LightManager")
self._initArrays()
self.pipeline = pipeline
self.settings = pipeline.getSettings()
# Create arrays to store lights & shadow sources
self.lights = []
self.shadowSources = []
self.queuedShadowUpdates = []
self.allLightsArray = ShaderStructArray(Light, self.maxTotalLights)
self.updateCallbacks = []
self.cullBounds = None
self.shadowScene = Globals.render
# Create atlas
self.shadowAtlas = ShadowAtlas()
self.shadowAtlas.setSize(self.settings.shadowAtlasSize)
self.shadowAtlas.create()
self.maxShadowMaps = 24
self.maxShadowUpdatesPerFrame = self.settings.maxShadowUpdatesPerFrame
self.numShadowUpdatesPTA = PTAInt.emptyArray(1)
self.updateShadowsArray = ShaderStructArray(
ShadowSource, self.maxShadowUpdatesPerFrame)
self.allShadowsArray = ShaderStructArray(
ShadowSource, self.maxShadowMaps)
# Create shadow compute buffer
self._createShadowComputationBuffer()
# Create the initial shadow state
self.shadowComputeCamera.setTagStateKey("ShadowPassShader")
self._createTagStates()
self.shadowScene.setTag("ShadowPassShader", "Default")
# Create debug overlay
self._createDebugTexts()
# Disable buffer on start
self.shadowComputeTarget.setActive(False)
# Bind arrays
self.updateShadowsArray.bindTo(self.shadowScene, "updateSources")
self.updateShadowsArray.bindTo(
self.shadowComputeTarget, "updateSources")
# Set initial inputs
for target in [self.shadowComputeTarget, self.shadowScene]:
target.setShaderInput("numUpdates", self.numShadowUpdatesPTA)
self.lightingComputator = None
self.lightCuller = None
self.skip = 0
self.skipRate = 0
def _createTagStates(self):
# Create shadow caster shader
self.shadowCasterShader = BetterShader.load(
"Shader/DefaultShadowCaster/vertex.glsl",
"Shader/DefaultShadowCaster/fragment.glsl",
"Shader/DefaultShadowCaster/geometry.glsl")
initialState = NodePath("ShadowCasterState")
initialState.setShader(self.shadowCasterShader, 30)
# initialState.setAttrib(CullFaceAttrib.make(CullFaceAttrib.MCullNone))
initialState.setAttrib(ColorWriteAttrib.make(ColorWriteAttrib.COff))
self.shadowComputeCamera.setTagState(
"Default", initialState.getState())
def _createShadowComputationBuffer(self):
""" This creates the internal shadow buffer which also is the
shadow atlas. Shadow maps are rendered to this using Viewports
(thank you rdb for adding this!). It also setups the base camera
which renders the shadow objects, although a custom mvp is passed
to the shaders, so the camera is mainly a dummy """
# Create camera showing the whole scene
self.shadowComputeCamera = Camera("ShadowComputeCamera")
self.shadowComputeCameraNode = self.shadowScene.attachNewNode(
self.shadowComputeCamera)
self.shadowComputeCamera.getLens().setFov(30, 30)
self.shadowComputeCamera.getLens().setNearFar(1.0, 2.0)
# Disable culling
self.shadowComputeCamera.setBounds(OmniBoundingVolume())
self.shadowComputeCamera.setCullBounds(OmniBoundingVolume())
self.shadowComputeCamera.setFinal(True)
self.shadowComputeCameraNode.setPos(0, 0, 1500)
self.shadowComputeCameraNode.lookAt(0, 0, 0)
self.shadowComputeTarget = RenderTarget("ShadowAtlas")
self.shadowComputeTarget.setSize(self.shadowAtlas.getSize())
self.shadowComputeTarget.addDepthTexture()
self.shadowComputeTarget.setDepthBits(32)
self.shadowComputeTarget.setSource(
self.shadowComputeCameraNode, Globals.base.win)
self.shadowComputeTarget.prepareSceneRender()
# This took me a long time to figure out. If not removing the quad
# children, the color and aux buffers will be overridden each frame.
# Quite annoying!
self.shadowComputeTarget.getQuad().node().removeAllChildren()
self.shadowComputeTarget.getInternalRegion().setSort(-200)
self.shadowComputeTarget.getInternalRegion().setNumRegions(
self.maxShadowUpdatesPerFrame + 1)
self.shadowComputeTarget.getInternalRegion().setDimensions(0,
(0, 0, 0, 0))
self.shadowComputeTarget.getInternalRegion().disableClears()
self.shadowComputeTarget.getInternalBuffer().disableClears()
self.shadowComputeTarget.getInternalBuffer().setSort(-300)
# We can't clear the depth per viewport.
# But we need to clear it in any way, as we still want
# z-testing in the buffers. So well, we create a
# display region *below* (smaller sort value) each viewport
# which has a depth-clear assigned. This is hacky, I know.
self.depthClearer = []
for i in range(self.maxShadowUpdatesPerFrame):
buff = self.shadowComputeTarget.getInternalBuffer()
dr = buff.makeDisplayRegion()
dr.setSort(-250)
for k in xrange(16):
dr.setClearActive(k, True)
dr.setClearValue(k, Vec4(0.5,0.5,0.5,1))
dr.setClearDepthActive(True)
dr.setClearDepth(1.0)
dr.setDimensions(0,0,0,0)
dr.setActive(False)
self.depthClearer.append(dr)
# When using hardware pcf, set the correct filter types
if self.settings.useHardwarePCF:
self.pcfSampleState = SamplerState()
self.pcfSampleState.setMinfilter(SamplerState.FTShadow)
self.pcfSampleState.setMagfilter(SamplerState.FTShadow)
self.pcfSampleState.setWrapU(SamplerState.WMClamp)
self.pcfSampleState.setWrapV(SamplerState.WMClamp)
dTex = self.getAtlasTex()
dTex.setWrapU(Texture.WMClamp)
dTex.setWrapV(Texture.WMClamp)
def getAllLights(self):
""" Returns all attached lights """
return self.lights
def getPCFSampleState(self):
""" Returns the pcf sample state used to sample the shadow map """
return self.pcfSampleState
def processCallbacks(self):
""" Processes all updates from the previous frame """
for update in self.updateCallbacks:
update.onUpdated()
self.updateCallbacks = []
def _createDebugTexts(self):
""" Creates a debug overlay if specified in the pipeline settings """
self.lightsVisibleDebugText = None
self.lightsUpdatedDebugText = None
if self.settings.displayDebugStats:
try:
from Code.GUI.FastText import FastText
self.lightsVisibleDebugText = FastText(pos=Vec2(
Globals.base.getAspectRatio() - 0.1, 0.84), rightAligned=True, color=Vec3(1, 1, 0), size=0.036)
self.lightsUpdatedDebugText = FastText(pos=Vec2(
Globals.base.getAspectRatio() - 0.1, 0.8), rightAligned=True, color=Vec3(1, 1, 0), size=0.036)
except Exception, msg:
self.debug(
"Overlay is disabled because FastText wasn't loaded")
