Wavelength dependent reflectance functions
SIGGRAPH '94 Proceedings of the 21st annual conference on Computer graphics and interactive techniques
Polarization and birefringency considerations in rendering
SIGGRAPH '94 Proceedings of the 21st annual conference on Computer graphics and interactive techniques
Ray Tracing with Polarization Parameters
IEEE Computer Graphics and Applications
Combined Rendering of Polarization and Fluorescence Effects
Proceedings of the 12th Eurographics Workshop on Rendering Techniques
Beam tracing polygonal objects
SIGGRAPH '84 Proceedings of the 11th annual conference on Computer graphics and interactive techniques
Computing the scattering properties of participating media using Lorenz-Mie theory
ACM SIGGRAPH 2007 papers
The Aristotelian rainbow: from philosophy to computer graphics
Proceedings of the 5th international conference on Computer graphics and interactive techniques in Australia and Southeast Asia
CVPR'03 Proceedings of the 2003 IEEE computer society conference on Computer vision and pattern recognition
Efficient rendering of atmospheric phenomena
EGSR'04 Proceedings of the Fifteenth Eurographics conference on Rendering Techniques
| Hi-index | 0.00 |
In this article, we derive a physically-based model for simulating rainbows. Previous techniques for simulating rainbows have used either geometric optics (ray tracing) or Lorenz-Mie theory. Lorenz-Mie theory is by far the most accurate technique as it takes into account optical effects such as dispersion, polarization, interference, and diffraction. These effects are critical for simulating rainbows accurately. However, as Lorenz-Mie theory is restricted to scattering by spherical particles, it cannot be applied to real raindrops which are nonspherical, especially for larger raindrops. We present the first comprehensive technique for simulating the interaction of a wavefront of light with a physically-based water drop shape. Our technique is based on ray tracing extended to account for dispersion, polarization, interference, and diffraction. Our model matches Lorenz-Mie theory for spherical particles, but it also enables the accurate simulation of nonspherical particles. It can simulate many different rainbow phenomena including double rainbows and supernumerary bows. We show how the nonspherical raindrops influence the shape of the rainbows, and we provide a simulation of the rare twinned rainbow, which is believed to be caused by nonspherical water drops.