Realtime Water Simulation on GPU
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Realtime Water Simulation on GPU
Nuttapong Chentanez NVIDIA Research
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Overview
? Approaches to realtime water simulation ? Hybrid shallow water solver + particles ? Hybrid 3D tall cell water solver + particles ? Future
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Realtime Water Simulation
"2D"
"3D"
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"2D" Simulations
? Water represented by height above an
underlying terrain
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"2D" Simulations
? Grid
NVIDIA DirectX 11, Island Demo
FFT
? Particle
Hilko et al. 09
Wave sim Pipe sim
Brodtkorb A. R. et al. 11,
Shallow water sim
Yuksel et. al. 07
Wave Particle
Solenthaler et al. 11
Shallow water SPH
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"2D" grid
? Water depth (and terrain
Z
height) stored in 2D array
? Water depth is updated in
each time step
X
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FFT
? Fast Fourier Transform (FFT) ? Represent waves as sum of sinusoids ? Wave length, speed, amplitude from
statistical models
? Update height and derivatives in
frequency domain
? Use iFFT to transform back to spatial
domain for rendering
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