Draft engine

[mschauer]

I want to design an engine for our samplers, so we do not have to reimplement everything just there is a new reflective wall in space.

I think we just need something like this:

while t′ < T
    # Who is (i) next, when (t′) and what (j) happens?
     i, t′ = peek(Q)
     e = action[i] 
     # Trigger state change
     if e > 0 # something? 
         sindex(action!, e, i, t′, u, args...)
     end
     # What happens next now has changed for each j, trigger updates
     for j in affected(G, e, i, t′, u, args...)
         τ, e = sfindmin(nextevent, j, e, i, t′, u, args...)
         Q[j] = τ
         action[j] = e
     end

     # register event (t′, i, u[i], e)
end

here sindex calls the i th function in the vector action! and sfindmin gives index and return value of each function in the function vector nextnext.

[codecov-commenter]

Codecov Report

Merging #77 (aa5a290) into master (a1989fe) will decrease coverage by 30.84%.
The diff coverage is 0.47%.

@@             Coverage Diff             @@
##           master      #77       +/-   ##
===========================================
- Coverage   79.85%   49.01%   -30.85%     
===========================================
  Files          18       34       +16     
  Lines        1127     2228     +1101     
===========================================
+ Hits          900     1092      +192     
- Misses        227     1136      +909     

Impacted Files	Coverage Δ
src/ZigZagBoomerang.jl	100.00% <ø> (ø)
src/common.jl	56.66% <0.00%> (-28.34%)	⬇️
src/discrete-continuous_zigzag.jl	0.00% <0.00%> (ø)
src/discrete_zigzag.jl	0.00% <0.00%> (ø)
src/engine.jl	0.00% <0.00%> (ø)
src/engineex.jl	0.00% <0.00%> (ø)
src/rev_jumps_vs_sticky.jl	0.00% <0.00%> (ø)
src/switch.jl	0.00% <0.00%> (ø)
src/trace.jl	67.94% <ø> (-23.23%)	⬇️
src/wranglers.jl	0.00% <0.00%> (ø)
... and 32 more

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