Some Records of Computer Graphics Enthusiast

H imatsubushi_

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Copyright (c) Bee; since 1998

Real-time Sub Surface Scattering Using Depth Buffers



click to download

This algorithm is completely original, not the same as that of NVIDIA's.


Non Real-time Sub Surface Scattering (reference)



upper left：Skin1, upper right：Apple
lower left：Potato, lower right：Skimmilk


Easy Breezy Metropolis Light Transport (reference)


by MLT



The distribution of the number of samples per pixel.
(Note the number of samples is correlated with the brightness.)


by pure path-tracing


Combined Lagrangian-Eulerian Approach for Accurate Advection


left: previous method (semi-lagrangian method), right: proposed method
in the same resolution.


left: previous method (semi-lagrangian method), right: proposed method
The 2D demo on GPUs (click to download)

BOTH calculations are done by 1st order (space and time) calculations.


Importance Resampling for Global Illumination (reference)



left: pure path-tracing, center: importance resampling, right: reference image
(click to enlarge)

Note the less noisy image is obtained by importance resampling,
compared to pure path-tracing.


GPU fluid (reference)



(click to download)


Geometry Images (reference)



Original mesh


Parameterization to a circle
(The red line shows the next cut path.)


Geometry image (click to download, floating point TIFF)
Reconstructed mesh


REAL cornell box



(click to enlarge)

THIS IS PHOTOGRAPH!


Spherical Parametrization and Remeshing (reference)



Original mesh


Spherical parameterization
(Developed unconstrained spherical parameterization.)


Geometry image (click to download, floating point TIFF）


Reconstructed mesh



PLY to MQO converter


ply2mqo2.zip

Some PLY files can be found at the Large Geometric Models Archive.
MQO is the original format of the Metasequoia.


Old Projects

anti-aliased line rasterization
anti-aliased triangle rasterization
Ascii-art shader
particle system
real-time cloth simulation
software rasterization: cube-mapping
software rasterization: depth of field effect
boids
texture generation using fractional brownian motion
fire using 2D cellular automaton
firewroks simulation
software rasterization: per-pixel glare filter
real-time dynamic fur
real-time elastic body simulation
landscape transformation
the game of life
real-time blobs
multi-sampling motion blur
particle based fluid simulation
photon mapping
hemicube radiosity on graphics hardware
real-time chromatic aberration
real-time ray-tracing using adaptive sampling
smoke based on NS equations
smoke using 2D cellular automaton
2D NS equations solver
heat haze by physically based convection
2D water by wave equations



Parthenon Render (global illumination using GPUs) website



within a minute @ Radeon 9700 Pro and Pentium 4 2.8GHz
approx. 600 samples per pixel


Fast Final Gathering Using Depth Peeling



all pixels are final gathered on a GPU.
no more complex interpolation!


Irradiance Caching



yellow points indicate irradiance caches


resulting image


another image


Path Tracing






Real-time Sub Surface Scattering with Inclusions





Wavelet Transfromation (Haar)



original image


wavelet transformation

All calculations are done with integer, so the transformation is complete loss-less.


Two Phase Fluid Flow (reference)







The resolution is 256^2.
based on CCUP method.

Dynamics of water and air are solved simultaneously.


Free Surface Flow



The resolution is 64^3.
Fluid is injected from a cube shaped source at the center.


Meshless Deformation Based on Shape Matching (reference)


(click to download)
Click the window to reset the simulation.


UV Unwrapping for Light Maps


unwrapped and packed triangles
(note its almost optimal space usage)


resulting textured model



something







to appear...