def __init__(self, N, sourceTex, normalizationFactor):
""" Creates a new fft instance. The source texture has to specified
from the begining, as the shaderAttributes are pregenerated for
performance reasons """
DebugObject.__init__(self, "GPU-FFT")
self.size = N
self.log2Size = int(math.log(N, 2))
self.normalizationFactor = normalizationFactor
# Create a ping and a pong texture, because we can't write to the
# same texture while reading to it (that would lead to unexpected
# behaviour, we could solve that by using an appropriate thread size,
# but it works fine so far)
self.pingTexture = Texture("FFTPing")
self.pingTexture.setup2dTexture(
self.size, self.size, Texture.TFloat, Texture.FRgba32)
self.pongTexture = Texture("FFTPong")
self.pongTexture.setup2dTexture(
self.size, self.size, Texture.TFloat, Texture.FRgba32)
self.sourceTex = sourceTex
for tex in [self.pingTexture, self.pongTexture, sourceTex]:
tex.setMinfilter(Texture.FTNearest)
tex.setMagfilter(Texture.FTNearest)
tex.setWrapU(Texture.WMClamp)
tex.setWrapV(Texture.WMClamp)
# Pregenerate weights & indices for the shaders
self._computeWeighting()
# Pre generate the shaders, we have 2 passes: Horizontal and Vertical
# which both execute log2(N) times with varying radii
self.horizontalFFTShader = BetterShader.loadCompute(
"Shader/Water/HorizontalFFT.compute")
self.horizontalFFT = NodePath("HorizontalFFT")
self.horizontalFFT.setShader(self.horizontalFFTShader)
self.horizontalFFT.setShaderInput(
"precomputedWeights", self.weightsLookupTex)
self.horizontalFFT.setShaderInput("N", LVecBase2i(self.size))
self.verticalFFTShader = BetterShader.loadCompute(
"Shader/Water/VerticalFFT.compute")
self.verticalFFT = NodePath("VerticalFFT")
self.verticalFFT.setShader(self.verticalFFTShader)
self.verticalFFT.setShaderInput(
"precomputedWeights", self.weightsLookupTex)
self.verticalFFT.setShaderInput("N", LVecBase2i(self.size))
# Create a texture where the result is stored
self.resultTexture = Texture("Result")
self.resultTexture.setup2dTexture(
self.size, self.size, Texture.TFloat, Texture.FRgba16)
self.resultTexture.setMinfilter(Texture.FTLinear)
self.resultTexture.setMagfilter(Texture.FTLinear)
# Prepare the shader attributes, so we don't have to regenerate them
# every frame -> That is VERY slow (3ms per fft instance)
self._prepareAttributes()
def setShaders(self, refreshPipeline=True):
""" Sets all shaders """
self.debug("Reloading Shaders ..")
if self.renderPipeline:
self.scene.setShader(
self.renderPipeline.getDefaultObjectShader(False))
self.model.setShader(
BetterShader.load("Shader/DefaultObjectShader/vertex.glsl",
"dynamicMaterialFragment.glsl"))
if refreshPipeline:
self.renderPipeline.reloadShaders()
if self.skybox:
self.skybox.setShader(
BetterShader.load("Shader/DefaultObjectShader/vertex.glsl",
"Shader/Skybox/fragment.glsl"))
def setShaders(self, refreshPipeline=True):
""" Sets all shaders """
self.debug("Reloading Shaders ..")
if self.renderPipeline:
self.scene.setShader(
self.renderPipeline.getDefaultObjectShader(False))
if refreshPipeline:
self.renderPipeline.reloadShaders()
if self.skybox:
self.skybox.setShader(BetterShader.load(
"Shader/DefaultObjectShader/vertex.glsl", "Shader/Skybox/fragment.glsl"))
def __init__(self):
DebugObject.__init__(self, "WaterManager")
self.options = OceanOptions()
self.options.size = 512
self.options.windDir.normalize()
self.options.waveAmplitude *= 1e-7
self.displacementTex = Texture("Displacement")
self.displacementTex.setup2dTexture(self.options.size,
self.options.size, Texture.TFloat,
Texture.FRgba16)
self.normalTex = Texture("Normal")
self.normalTex.setup2dTexture(self.options.size, self.options.size,
Texture.TFloat, Texture.FRgba16)
self.combineShader = BetterShader.loadCompute(
"Shader/Water/Combine.compute")
self.ptaTime = PTAFloat.emptyArray(1)
# Create a gaussian random texture, as shaders aren't well suited
# for that
setRandomSeed(523)
self.randomStorage = PNMImage(self.options.size, self.options.size, 4)
self.randomStorage.setMaxval((2**16) - 1)
for x in xrange(self.options.size):
for y in xrange(self.options.size):
rand1 = self._getGaussianRandom() / 10.0 + 0.5
rand2 = self._getGaussianRandom() / 10.0 + 0.5
self.randomStorage.setXel(x, y, LVecBase3d(rand1, rand2, 0))
self.randomStorage.setAlpha(x, y, 1.0)
self.randomStorageTex = Texture("RandomStorage")
self.randomStorageTex.load(self.randomStorage)
self.randomStorageTex.setFormat(Texture.FRgba16)
self.randomStorageTex.setMinfilter(Texture.FTNearest)
self.randomStorageTex.setMagfilter(Texture.FTNearest)
# Create the texture wwhere the intial height (H0 + Omega0) is stored.
self.texInitialHeight = Texture("InitialHeight")
self.texInitialHeight.setup2dTexture(self.options.size,
self.options.size, Texture.TFloat,
Texture.FRgba16)
self.texInitialHeight.setMinfilter(Texture.FTNearest)
self.texInitialHeight.setMagfilter(Texture.FTNearest)
# Create the shader which populates the initial height texture
self.shaderInitialHeight = BetterShader.loadCompute(
"Shader/Water/InitialHeight.compute")
self.nodeInitialHeight = NodePath("initialHeight")
self.nodeInitialHeight.setShader(self.shaderInitialHeight)
self.nodeInitialHeight.setShaderInput("dest", self.texInitialHeight)
self.nodeInitialHeight.setShaderInput("N",
LVecBase2i(self.options.size))
self.nodeInitialHeight.setShaderInput("patchLength",
self.options.patchLength)
self.nodeInitialHeight.setShaderInput("windDir", self.options.windDir)
self.nodeInitialHeight.setShaderInput("windSpeed",
self.options.windSpeed)
self.nodeInitialHeight.setShaderInput("waveAmplitude",
self.options.waveAmplitude)
self.nodeInitialHeight.setShaderInput("windDependency",
self.options.windDependency)
self.nodeInitialHeight.setShaderInput("randomTex",
self.randomStorageTex)
self.attrInitialHeight = self.nodeInitialHeight.getAttrib(ShaderAttrib)
self.heightTextures = []
for i in xrange(3):
tex = Texture("Height")
tex.setup2dTexture(self.options.size, self.options.size,
Texture.TFloat, Texture.FRgba16)
tex.setMinfilter(Texture.FTNearest)
tex.setMagfilter(Texture.FTNearest)
tex.setWrapU(Texture.WMClamp)
tex.setWrapV(Texture.WMClamp)
self.heightTextures.append(tex)
# Also create the shader which updates the spectrum
self.shaderUpdate = BetterShader.loadCompute(
"Shader/Water/Update.compute")
self.nodeUpdate = NodePath("update")
self.nodeUpdate.setShader(self.shaderUpdate)
self.nodeUpdate.setShaderInput("outH0x", self.heightTextures[0])
self.nodeUpdate.setShaderInput("outH0y", self.heightTextures[1])
self.nodeUpdate.setShaderInput("outH0z", self.heightTextures[2])
self.nodeUpdate.setShaderInput("initialHeight", self.texInitialHeight)
self.nodeUpdate.setShaderInput("N", LVecBase2i(self.options.size))
self.nodeUpdate.setShaderInput("time", self.ptaTime)
self.attrUpdate = self.nodeUpdate.getAttrib(ShaderAttrib)
# Create 3 FFTs
self.fftX = GPUFFT(self.options.size, self.heightTextures[0],
self.options.normalizationFactor)
self.fftY = GPUFFT(self.options.size, self.heightTextures[1],
self.options.normalizationFactor)
self.fftZ = GPUFFT(self.options.size, self.heightTextures[2],
self.options.normalizationFactor)
self.combineNode = NodePath("Combine")
self.combineNode.setShader(self.combineShader)
self.combineNode.setShaderInput("displacementX",
self.fftX.getResultTexture())
self.combineNode.setShaderInput("displacementY",
self.fftY.getResultTexture())
self.combineNode.setShaderInput("displacementZ",
self.fftZ.getResultTexture())
self.combineNode.setShaderInput("normalDest", self.normalTex)
self.combineNode.setShaderInput("displacementDest",
self.displacementTex)
self.combineNode.setShaderInput("N", LVecBase2i(self.options.size))
self.combineNode.setShaderInput("choppyScale",
self.options.choppyScale)
self.combineNode.setShaderInput("gridLength", self.options.patchLength)
# Store only the shader attrib as this is way faster
self.attrCombine = self.combineNode.getAttrib(ShaderAttrib)
def reloadShader(self):
self.renderPipeline.reloadShaders()
render.setShader(self.renderPipeline.getDefaultObjectShader())
self.skybox.setShader(
BetterShader.load("Shader/DefaultObjectShader/vertex.glsl",
"Shader/Skybox/fragment.glsl"))
def reloadShader(self):
self.renderPipeline.reloadShaders()
render.setShader(self.renderPipeline.getDefaultObjectShader())
self.skybox.setShader(BetterShader.load(
"Shader/DefaultObjectShader/vertex.glsl", "Shader/Skybox/fragment.glsl"))
def __init__(self):
DebugObject.__init__(self, "WaterManager")
self.options = OceanOptions()
self.options.size = 512
self.options.windDir.normalize()
self.options.waveAmplitude *= 1e-7
self.displacementTex = Texture("Displacement")
self.displacementTex.setup2dTexture(
self.options.size, self.options.size,
Texture.TFloat, Texture.FRgba16)
self.normalTex = Texture("Normal")
self.normalTex.setup2dTexture(
self.options.size, self.options.size,
Texture.TFloat, Texture.FRgba16)
self.combineShader = BetterShader.loadCompute(
"Shader/Water/Combine.compute")
self.ptaTime = PTAFloat.emptyArray(1)
# Create a gaussian random texture, as shaders aren't well suited
# for that
setRandomSeed(523)
self.randomStorage = PNMImage(self.options.size, self.options.size, 4)
self.randomStorage.setMaxval((2 ** 16) - 1)
for x in xrange(self.options.size):
for y in xrange(self.options.size):
rand1 = self._getGaussianRandom() / 10.0 + 0.5
rand2 = self._getGaussianRandom() / 10.0 + 0.5
self.randomStorage.setXel(x, y, LVecBase3d(rand1, rand2, 0))
self.randomStorage.setAlpha(x, y, 1.0)
self.randomStorageTex = Texture("RandomStorage")
self.randomStorageTex.load(self.randomStorage)
self.randomStorageTex.setFormat(Texture.FRgba16)
self.randomStorageTex.setMinfilter(Texture.FTNearest)
self.randomStorageTex.setMagfilter(Texture.FTNearest)
# Create the texture wwhere the intial height (H0 + Omega0) is stored.
self.texInitialHeight = Texture("InitialHeight")
self.texInitialHeight.setup2dTexture(
self.options.size, self.options.size,
Texture.TFloat, Texture.FRgba16)
self.texInitialHeight.setMinfilter(Texture.FTNearest)
self.texInitialHeight.setMagfilter(Texture.FTNearest)
# Create the shader which populates the initial height texture
self.shaderInitialHeight = BetterShader.loadCompute(
"Shader/Water/InitialHeight.compute")
self.nodeInitialHeight = NodePath("initialHeight")
self.nodeInitialHeight.setShader(self.shaderInitialHeight)
self.nodeInitialHeight.setShaderInput("dest", self.texInitialHeight)
self.nodeInitialHeight.setShaderInput(
"N", LVecBase2i(self.options.size))
self.nodeInitialHeight.setShaderInput(
"patchLength", self.options.patchLength)
self.nodeInitialHeight.setShaderInput("windDir", self.options.windDir)
self.nodeInitialHeight.setShaderInput(
"windSpeed", self.options.windSpeed)
self.nodeInitialHeight.setShaderInput(
"waveAmplitude", self.options.waveAmplitude)
self.nodeInitialHeight.setShaderInput(
"windDependency", self.options.windDependency)
self.nodeInitialHeight.setShaderInput(
"randomTex", self.randomStorageTex)
self.attrInitialHeight = self.nodeInitialHeight.getAttrib(ShaderAttrib)
self.heightTextures = []
for i in xrange(3):
tex = Texture("Height")
tex.setup2dTexture(self.options.size, self.options.size,
Texture.TFloat, Texture.FRgba16)
tex.setMinfilter(Texture.FTNearest)
tex.setMagfilter(Texture.FTNearest)
tex.setWrapU(Texture.WMClamp)
tex.setWrapV(Texture.WMClamp)
self.heightTextures.append(tex)
# Also create the shader which updates the spectrum
self.shaderUpdate = BetterShader.loadCompute(
"Shader/Water/Update.compute")
self.nodeUpdate = NodePath("update")
self.nodeUpdate.setShader(self.shaderUpdate)
self.nodeUpdate.setShaderInput("outH0x", self.heightTextures[0])
self.nodeUpdate.setShaderInput("outH0y", self.heightTextures[1])
self.nodeUpdate.setShaderInput("outH0z", self.heightTextures[2])
self.nodeUpdate.setShaderInput("initialHeight", self.texInitialHeight)
self.nodeUpdate.setShaderInput("N", LVecBase2i(self.options.size))
self.nodeUpdate.setShaderInput("time", self.ptaTime)
self.attrUpdate = self.nodeUpdate.getAttrib(ShaderAttrib)
# Create 3 FFTs
self.fftX = GPUFFT(self.options.size, self.heightTextures[0],
self.options.normalizationFactor)
self.fftY = GPUFFT(self.options.size, self.heightTextures[1],
self.options.normalizationFactor)
self.fftZ = GPUFFT(self.options.size, self.heightTextures[2],
self.options.normalizationFactor)
self.combineNode = NodePath("Combine")
self.combineNode.setShader(self.combineShader)
self.combineNode.setShaderInput(
"displacementX", self.fftX.getResultTexture())
self.combineNode.setShaderInput(
"displacementY", self.fftY.getResultTexture())
self.combineNode.setShaderInput(
"displacementZ", self.fftZ.getResultTexture())
self.combineNode.setShaderInput("normalDest", self.normalTex)
self.combineNode.setShaderInput(
"displacementDest", self.displacementTex)
self.combineNode.setShaderInput(
"N", LVecBase2i(self.options.size))
self.combineNode.setShaderInput(
"choppyScale", self.options.choppyScale)
self.combineNode.setShaderInput(
"gridLength", self.options.patchLength)
# Store only the shader attrib as this is way faster
self.attrCombine = self.combineNode.getAttrib(ShaderAttrib)
