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fdtd:geometry_modifiers
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fdtd:geometry_modifiers [2018/08/28 15:04] pklapetek |
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| - | The roughness can be also added by a simpler and faster procedure similar to addition of gaussian noise to an image (but done in 3D). Here, 3D gaussians are added to random places in the computational volume and using thresholding the new object surface is determined. | + | The roughness can be also added by a simpler and faster procedure similar to addition of correlated Gaussian noise to an image (but done in 3D). Here, the object position in the computational volume is represented by a probability of having the material on a certain place (1 means object, 0 no object at the beginning of calculation). 3D gaussians are added to random places in the computational volume and using thresholding the new object surface is determined. |
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| + | Finally, we can use some function to modify the object shape. Again using an example from lower dimensions, | ||
| + | this is similar to adding e.g. small sine function signal to a 1D signal. Her, similarly to the MEDIUM_ROUGHEN directive, a probability map of finding material in a given voxel is created and then altered via an analytical expression given by user. | ||
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fdtd/geometry_modifiers.txt · Last modified: 2018/10/11 15:09 by pklapetek
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