Sampleplotting

[hervasa2]

Added a scatter plot method for plotting detectors
This method is based on the sample function of each primitive
It supports negative geometries
Relatively fast for examples. However, will take too long if contacts are too thick in comparison to the world.
Scatter plotting code (SSD_style = :samplesurface) is written in the plot recipe of each primitive
Plot recipes now pass the detector and the contact to each other so that sampling can be done with respect to world size and negative geometries can be removed.
plot(simulation.detector, camera = (20,30))
OR
plot(simulation.detector, camera = (20,30), SSD_style = :wireframe)

Note that there is a hexagonal negative geometry not shown by :wireframe. This can now be shown by :samplesurface
plot(simulation.detector, camera = (20,30), SSD_style = :samplesurface)
OR
plot(simulation.detector, camera = (20,30), SSD_style = :samplesurface, alpha_factor = 1)

alpha_factor can be any number >= 0. At some point the opacity will saturate. Each positive geometry has a different calculated alpha
plot(simulation.detector, camera = (20,30), SSD_style = :samplesurface, alpha_factor = 0.3

)
More examples with default alpha_factor follow:
plot(simulation.detector, camera = (20,30), SSD_style = :samplesurface)

[fhagemann]

CartesianPoint{T} is not needed.

[hervasa2]

Updates: Instead of detector being passed a world_size is passed. Instead of the contact being passed, an array of negative geometries is being passed.
Now plot recipes for individual contacts or positive geometries work for :sampleplotting method. Before they relied on a detector being passed to them. If no world_size is received by a plot recipe, it determines it for each positive geometry plotted. If no array of negative geometries is passed the plot recipe for a positive geometry will simply not check if any of its points are in a negative geometry.
PENDING: Add color array input

[hervasa2]

Color choosing is available via keyword palette. Examples:
palette = cgrad(:viridis, 5, categorical = true)
palette = :tab10
palette = [:red,:blue,:black]
If not enough colors are given for contacts, it will cycle

[schustermartin]

This looks very good! And I think it is ready. Great job