Weighted blended order independent transparency
Weighted Blended Order-Independent TransparencyMorgan MacGuireLouis BavoilNVIDIA
Journal of Computer Graphics Techniques Vol. 2, No. 2, 2013
blendingOver operatorblendingOITNew methodFuture work
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Abstract, .Order-Independent Transparency (OIT).OVEROIT. 2
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,
1. : (unsorted OVER), : OIT 3
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OIT DEMODEMO4
Porter & Duff OVER Compositing,
OVER operator [Porter and Duff 1984]
glBlendEquation(GL_FUNC_ADD)
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA)5
OVER COMPOSITING,
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OVER COMPOSITING, 7
OVER COMPOSITING, 8
OVER COMPOSITING,
Order Independent Part
Order dependent Part9
Porter & Duff OVER Compositing, OVERCompositiongA-buffer:
(unbounded) 10
Key-ideasOrder-independent transparency , .Stochastic Transparency, CSAA, etcZ.Bounded A-Buffer, Stencil Routed K-buffer, Stencil Routed A-Buffer, etc. Fourier Opacity Mapping, etcCompositing operator. Order-Independent Transparency.
GPU..
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blended OIT (meshkins)Order-independent transparency 2007, MeshkinCompositing operator.12
blended OIT (meshkins)Order-independent transparency
.. .
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blended OIT (meshkins) EXAMPLEOrder-independent transparency
Sorted, =0.25Approx, =0.2514
blended OIT (meshkins) EXAMPLEOrder-independent transparency Sorted, =0.5Approx, =0.5
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blended OIT (meshkins) implementationOrder-independent transparency
. MeshkinOpenGL
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Blended oit ADVANTAGESOrder-independent transparency 17DX11-class GPUs (PS4, XboxOne, NVIDIA 2010~ , AMD 2009~, Intel 2012~)DX9-class GPUs (Xbox360, PS3, WiiU, NVIDIA 2003~, AMD 2002~, Intel 2005~)OpenGL ES 3.0 GPUs (with half float) (PowerVR G6430, Tegra K1, iphone 5s)WebGL1(with float texture) , WebGL2 8-bit
blended OIT (BAVOIL AND MYERS)Order-independent transparency 2008, BavoilMeshkin. 18
blended OIT (BAVOIL AND MYERS)Order-independent transparency Cwa, Composition Operator.4
Ci19
blended OIT (BAVOIL AND MYERS)Order-independent transparency
Ci
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blended OIT (BAVOIL AND MYERS)Order-independent transparency 2008, BavoilMeshkin. Composition Operator.MultiRenderingTarget16-bit float blending.21
blended OIT (BAVOIL AND MYERS) DEMOOrder-independent transparency DEMO22
blended OIT (BAVOIL AND MYERS) implementationOrder-independent transparency
3. Bavoil, MyersOpenGL
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2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency
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Depth weight function2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency
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Depth weight function2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency (0.1 < |z| < 500, 16-bit float buffer)
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Depth weight function2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency
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implementeation2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency
accumTexture.rgbaccumTexture.aRevealage
Coverage
revealageTexture.r28
implementeation2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency
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Implementeation (for restricted platform)2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency
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RenderTargetblendingC, Alphablending.
RESULTs2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency
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RESULTs2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency
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RESULTs2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency
5. CAD33
RESULTs2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency
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RESULTs2013 new weighted blended OIT (BAVOIL and MacGuire) Order-independent transparency
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