class DynamicExposurePass(RenderPass):
""" This pass handles the dynamic exposure feature, it downscales the
Scene to get the average brightness and then outputs a new exposure which
can be used by the lighting pass. """
def __init__(self, pipeline):
RenderPass.__init__(self)
self.pipeline = pipeline
# Create the storage for the exposure. We cannot simply use the color output
# as the RenderTargetMatcher would have problems with that (Circular Reference)
self.lastExposureStorage = Texture("Last Exposure")
self.lastExposureStorage.setup2dTexture(1, 1, Texture.TFloat, Texture.FR32)
# Registers the texture so the lighting pass can use it
self.pipeline.renderPassManager.registerStaticVariable(
"dynamicExposureTex", self.lastExposureStorage)
def getID(self):
return "DynamicExposurePass"
def getRequiredInputs(self):
return {
"colorTex": "LightingPass.resultTex",
"dt": "Variables.frameDelta"
}
def create(self):
# Fetch the original texture size from the window size
size = LVecBase2i(Globals.base.win.getXSize(), Globals.base.win.getYSize())
# Create the first downscale pass which reads the scene texture, does a
# 2x2 inplace box filter, and then converts the result to luminance.
# Using luminance allows faster downscaling, as we can use texelGather then
self.downscalePass0 = RenderTarget("Downscale Initial")
self.downscalePass0.addColorTexture()
self.downscalePass0.setSize(size.x / 2, size.y / 2)
self.downscalePass0.prepareOffscreenBuffer()
# Store the current size of the pass
workSizeX, workSizeY = int(size.x / 2), int(size.y / 2)
self.downscalePasses = []
passIdx = 0
lastTex = self.downscalePass0.getColorTexture()
# Scale the scene until there are only a few pixels left. Each pass does a
# 4x4 inplace box filter, which is cheap because we can sample the luminance
# only.
while workSizeX * workSizeY > 128:
workSizeX /= 4
workSizeY /= 4
passIdx += 1
scalePass = RenderTarget("Downscale Pass " + str(passIdx))
scalePass.setSize(workSizeX, workSizeY)
scalePass.addColorTexture()
scalePass.prepareOffscreenBuffer()
scalePass.setShaderInput("luminanceTex", lastTex)
lastTex = scalePass.getColorTexture()
self.downscalePasses.append(scalePass)
# Create the final pass which computes the average of all left pixels,
# compares that with the last exposure and stores the difference.
self.finalDownsamplePass = RenderTarget("Downscale Final")
self.finalDownsamplePass.setSize(1, 1)
# self.finalDownsamplePass.setColorBits(16)
# self.finalDownsamplePass.addColorTexture()
self.finalDownsamplePass.setColorWrite(False)
self.finalDownsamplePass.prepareOffscreenBuffer()
self.finalDownsamplePass.setShaderInput("luminanceTex", lastTex)
self.finalDownsamplePass.setShaderInput("targetExposure",
self.pipeline.settings.targetExposure)
self.finalDownsamplePass.setShaderInput("adaptionSpeed",
self.pipeline.settings.brightnessAdaptionSpeed)
# Clear the storage in the beginning
self.lastExposureStorage.setClearColor(Vec4(0))
self.lastExposureStorage.clearImage()
# Set defines and other inputs
self.finalDownsamplePass.setShaderInput("lastExposureTex", self.lastExposureStorage)
self.pipeline.renderPassManager.registerDefine("USE_DYNAMIC_EXPOSURE", 1)
def setShaders(self):
shaderFirstPass = Shader.load(Shader.SLGLSL,
"Shader/DefaultPostProcess.vertex",
"Shader/DownsampleFirstPass.fragment")
self.downscalePass0.setShader(shaderFirstPass)
shaderDownsample = Shader.load(Shader.SLGLSL,
"Shader/DefaultPostProcess.vertex",
"Shader/Downsample.fragment")
for scalePass in self.downscalePasses:
scalePass.setShader(shaderDownsample)
shaderFinal = Shader.load(Shader.SLGLSL,
"Shader/DefaultPostProcess.vertex",
"Shader/DownsampleFinalPass.fragment")
self.finalDownsamplePass.setShader(shaderFinal)
return [shaderFirstPass, shaderDownsample, shaderFinal]
def setShaderInput(self, name, value, *args):
self.downscalePass0.setShaderInput(name, value, *args)
self.finalDownsamplePass.setShaderInput(name, value, *args)
def getOutputs(self):
return {
}
class VoxelizePass(RenderPass):
""" This pass manages voxelizing the scene from multiple directions to generate
a 3D voxel grid. It handles the camera setup and provides a simple interface. """
def __init__(self):
RenderPass.__init__(self)
def getID(self):
return "VoxelizePass"
def getRequiredInputs(self):
return {
}
def setVoxelGridResolution(self, voxelGridResolution):
""" Sets the voxel grid resolution, this is the amount of voxels in every
direction, so the voxel grid will have voxelGridResolution**3 total voxels. """
self.voxelGridResolution = voxelGridResolution
def setVoxelGridSize(self, voxelGridSize):
""" Sets the size of the voxel grid in world space units. This is the
size going from the mid of the voxel grid, so the effective voxel grid
will have twice the size specified in voxelGridSize """
self.voxelGridSize = voxelGridSize
def setActive(self, active):
""" Enables and disables this pass """
self.target.setActive(active)
def initVoxelStorage(self):
""" Creates t he 3D Texture to store the voxel generation grid """
self.voxelGenTex = Texture("VoxelsTemp")
self.voxelGenTex.setup3dTexture(self.voxelGridResolution.x, self.voxelGridResolution.y,
self.voxelGridResolution.z, Texture.TInt, Texture.FR32i)
# Set appropriate filter types
self.voxelGenTex.setMinfilter(SamplerState.FTNearest)
self.voxelGenTex.setMagfilter(Texture.FTNearest)
self.voxelGenTex.setWrapU(Texture.WMClamp)
self.voxelGenTex.setWrapV(Texture.WMClamp)
self.voxelGenTex.setWrapW(Texture.WMClamp)
self.voxelGenTex.setClearColor(Vec4(0))
# Register texture
MemoryMonitor.addTexture("Voxel Temp Texture", self.voxelGenTex)
def getVoxelTex(self):
""" Returns a handle to the generated voxel texture """
return self.voxelGenTex
def clearGrid(self):
""" Clears the voxel grid """
self.voxelGenTex.clearImage()
def create(self):
# Create voxelize camera
self.voxelizeCamera = Camera("VoxelizeScene")
self.voxelizeCamera.setCameraMask(BitMask32.bit(4))
self.voxelizeCameraNode = Globals.render.attachNewNode(self.voxelizeCamera)
self.voxelizeLens = OrthographicLens()
self.voxelizeLens.setFilmSize(self.voxelGridSize.x*2, self.voxelGridSize.y*2)
self.voxelizeLens.setNearFar(0.0, self.voxelGridSize.x*2)
self.voxelizeCamera.setLens(self.voxelizeLens)
self.voxelizeCamera.setTagStateKey("VoxelizePassShader")
Globals.render.setTag("VoxelizePassShader", "Default")
# Create voxelize tareet
self.target = RenderTarget("VoxelizePass")
self.target.setSize( self.voxelGridResolution.x * 4 )
self.target.setColorWrite(False)
self.target.setCreateOverlayQuad(False)
self.target.setSource(self.voxelizeCameraNode, Globals.base.win)
self.target.prepareSceneRender()
self.target.setActive(False)
self.target.getInternalRegion().setSort(-400)
self.target.getInternalBuffer().setSort(-399)
def voxelizeSceneFromDirection(self, gridPos, direction="x"):
""" Voxelizes the scene from a given direction. This method handles setting
the camera position aswell as the near and far plane. If the pass was disabled,
it also enables this pass. """
assert(direction in "x y z".split())
self.setActive(True)
if direction == "x":
self.voxelizeLens.setFilmSize(self.voxelGridSize.y*2, self.voxelGridSize.z*2)
self.voxelizeLens.setNearFar(0.0, self.voxelGridSize.x*2)
self.voxelizeCameraNode.setPos(gridPos - Vec3(self.voxelGridSize.x, 0, 0))
self.voxelizeCameraNode.lookAt(gridPos)
elif direction == "y":
self.voxelizeLens.setFilmSize(self.voxelGridSize.x*2, self.voxelGridSize.z*2)
self.voxelizeLens.setNearFar(0.0, self.voxelGridSize.y*2)
self.voxelizeCameraNode.setPos(gridPos - Vec3(0, self.voxelGridSize.y, 0))
self.voxelizeCameraNode.lookAt(gridPos)
elif direction == "z":
self.voxelizeLens.setFilmSize(self.voxelGridSize.x*2, self.voxelGridSize.y*2)
self.voxelizeLens.setNearFar(0.0, self.voxelGridSize.z*2)
self.voxelizeCameraNode.setPos(gridPos + Vec3(0, 0, self.voxelGridSize.z))
self.voxelizeCameraNode.lookAt(gridPos)
def setShaders(self):
""" Creates the tag state and loades the voxelizer shader """
voxelizeShader = Shader.load(Shader.SLGLSL,
"Shader/GI/Voxelize.vertex",
"Shader/GI/Voxelize.fragment")
# Create tag state
initialState = NodePath("VoxelizerState")
initialState.setShader(voxelizeShader, 500)
initialState.setAttrib(CullFaceAttrib.make(CullFaceAttrib.MCullNone))
initialState.setDepthWrite(False)
initialState.setDepthTest(False)
initialState.setAttrib(DepthTestAttrib.make(DepthTestAttrib.MNone))
initialState.setShaderInput("giVoxelGenerationTex", self.voxelGenTex)
# Apply tag state
self.voxelizeCamera.setTagState("Default", initialState.getState())
return [voxelizeShader]
def getOutputs(self):
return {
}
class ShadowScenePass(RenderPass):
""" This pass manages rendering the scene from the perspective of the shadow
sources to generate the shadow maps. It also handles creating and managing
the different regions of the shadow atlas, aswell as the initial state of
all cameras assigned to the regions """
def __init__(self):
RenderPass.__init__(self)
self.maxRegions = 8
self.shadowScene = Globals.base.render
def setMaxRegions(self, maxRegions):
""" Sets the maximum amount of regions the atlas has. This is usually
equal to the maximum number of shadow updates per frame """
self.maxRegions = maxRegions
def getID(self):
return "ShadowScenePass"
def getRequiredInputs(self):
return {
"numUpdates": "Variables.numShadowUpdates",
"updateSources": "Variables.shadowUpdateSources"
}
def setShaders(self):
casterShader = Shader.load(Shader.SLGLSL,
"Shader/DefaultShaders/ShadowCasting/vertex.glsl",
"Shader/DefaultShaders/ShadowCasting/fragment.glsl")
initialState = NodePath("ShadowCasterState")
initialState.setShader(casterShader, 100)
initialState.setAttrib(ColorWriteAttrib.make(ColorWriteAttrib.COff))
for camera in self.shadowCameras:
camera.node().setTagState("Default", initialState.getState())
casterShaderTransparent = Shader.load(Shader.SLGLSL,
"Shader/DefaultShaders/TransparentShadowCasting/vertex.glsl",
"Shader/DefaultShaders/TransparentShadowCasting/fragment.glsl")
initialState = NodePath("ShadowCasterStateTransparent")
initialState.setShader(casterShaderTransparent, 100)
initialState.setAttrib(ColorWriteAttrib.make(ColorWriteAttrib.COff))
for camera in self.shadowCameras:
camera.node().setTagState("Transparent", initialState.getState())
return [casterShader, casterShaderTransparent]
def setSize(self, size):
""" Sets the shadow atlas size """
self.size = size
def setActiveRegionCount(self, activeCount):
""" Sets the number of active regions, disabling all other regions. If the
count is less than 1, completely disables the pass """
if activeCount < 1:
self.target.setActive(False)
for region in self.renderRegions:
region.setActive(False)
else:
self.target.setActive(True)
for index, region in enumerate(self.renderRegions):
if index < activeCount:
region.setActive(True)
pass
else:
region.setActive(False)
def setRegionDimensions(self, index, l, r, b, t):
""" Sets the dimensions of the n-th region to the given dimensions """
self.renderRegions[index].setDimensions(l, r, b, t)
def getRegionCamera(self, index):
""" Returns the camera of the n-th region """
return self.shadowCameras[index]
def create(self):
# Create the atlas target
self.target = RenderTarget("ShadowAtlas")
self.target.setSize(self.size)
self.target.addDepthTexture()
self.target.setDepthBits(32)
self.target.setColorWrite(False)
self.target.setCreateOverlayQuad(False)
# self.target.setActive(False)
self.target.setSource(
NodePath(Camera("tmp")), Globals.base.win)
self.target.prepareSceneRender()
self.target.setClearDepth(False)
# Set the appropriate filter modes
dTex = self.target.getDepthTexture()
dTex.setWrapU(SamplerState.WMClamp)
dTex.setWrapV(SamplerState.WMClamp)
# Remove the default postprocess quad
# self.target.getQuad().node().removeAllChildren()
# self.target.getInternalRegion().setSort(-200)
self.target.getInternalRegion().disableClears()
self.target.getInternalBuffer().disableClears()
# self.target.getInternalBuffer().setSort(-300)
# Create default initial state
initialState = NodePath("InitialState")
initialState.setAttrib(ColorWriteAttrib.make(ColorWriteAttrib.COff))
# Create a camera for each update
self.shadowCameras = []
for i in xrange(self.maxRegions):
shadowCam = Camera("ShadowComputeCamera")
shadowCam.setTagStateKey("ShadowPassShader")
shadowCam.setInitialState(initialState.getState())
shadowCam.setCameraMask(BitMask32.bit(3))
shadowCamNode = self.shadowScene.attachNewNode(shadowCam)
self.shadowCameras.append(shadowCamNode)
# Create regions
self.renderRegions = []
buff = self.target.getInternalBuffer()
for i in xrange(self.maxRegions):
dr = buff.makeDisplayRegion()
dr.setSort(1000)
dr.setClearDepthActive(True)
dr.setClearDepth(1.0)
# dr.setClearColorActive(False)
# dr.setClearColor(Vec4(1,1,1,1))
dr.setCamera(self.shadowCameras[i])
dr.setActive(False)
self.renderRegions.append(dr)
self.pcfSampleState = SamplerState()
self.pcfSampleState.setMinfilter(SamplerState.FTShadow)
self.pcfSampleState.setMagfilter(SamplerState.FTShadow)
self.pcfSampleState.setWrapU(SamplerState.WMClamp)
self.pcfSampleState.setWrapV(SamplerState.WMClamp)
# Globals.render.setTag("ShadowPassShader", "Default")
def setShaderInput(self, name, val, *args):
self.shadowScene.setShaderInput(name, val, *args)
def getOutputs(self):
return {
"ShadowScenePass.atlas": lambda: self.target.getDepthTexture(),
"ShadowScenePass.atlasPCF": lambda: (self.target.getDepthTexture(), self.pcfSampleState),
}
