feat: add latexify recipe for AnalysisPoint

Author: AayushSabharwal

src/systems/analysis_points.jl

@@ -140,6 +140,19 @@ function Base.show(io::IO, ::MIME"text/plain", ap::AnalysisPoint)
     end
 end
 
+@latexrecipe function f(ap::AnalysisPoint)
+    index --> :subscript
+    snakecase --> true
+    ap.input === nothing && return 0
+    outs = Expr(:vect)
+    append!(outs.args, ap_var.(ap.outputs))
+    return Expr(:call, :AnalysisPoint, ap_var(ap.input), ap.name, outs)
+end
+
+function Base.show(io::IO, ::MIME"text/latex", ap::AnalysisPoint)
+    print(io, latexify(ap))
+end
+
 """
     $(TYPEDSIGNATURES)
 

test/latexify.jl

@@ -3,6 +3,7 @@ using Latexify
 using ModelingToolkit
 using ReferenceTests
 using ModelingToolkit: t_nounits as t, D_nounits as D
+using ModelingToolkitStandardLibrary.Blocks
 
 ### Tips for generating latex tests:
 ### Latexify has an unexported macro:
@@ -47,3 +48,13 @@ eqs = [D(u[1]) ~ p[3] * (u[2] - u[1]),
 eqs = [D(x) ~ (1 + cos(t)) / (1 + 2 * x)]
 
 @test_reference "latexify/40.tex" latexify(eqs)
+
+@named P = FirstOrder(k = 1, T = 1)
+@named C = Gain(; k = -1)
+
+ap = AnalysisPoint(:plant_input)
+eqs = [connect(P.output, C.input)
+       connect(C.output, ap, P.input)]
+sys_ap = ODESystem(eqs, t, systems = [P, C], name = :hej)
+
+@test_reference "latexify/50.tex" latexify(sys_ap)

test/latexify/50.tex

@@ -0,0 +1,19 @@
+\begin{equation}
+\left[
+\begin{array}{c}
+\mathrm{connect}\left( P_{+}output, C_{+}input \right) \\
+AnalysisPoint\left( \mathtt{C.output.u}\left( t \right), plant\_input, \left[
+\begin{array}{c}
+\mathtt{P.input.u}\left( t \right) \\
+\end{array}
+\right] \right) \\
+\mathtt{P.u}\left( t \right) = \mathtt{P.input.u}\left( t \right) \\
+\mathtt{P.y}\left( t \right) = \mathtt{P.output.u}\left( t \right) \\
+\mathtt{P.y}\left( t \right) = \mathtt{P.x}\left( t \right) \\
+\frac{\mathrm{d} \mathtt{P.x}\left( t \right)}{\mathrm{d}t} = \frac{ - \mathtt{P.x}\left( t \right) + \mathtt{P.k} \mathtt{P.u}\left( t \right)}{\mathtt{P.T}} \\
+\mathtt{C.u}\left( t \right) = \mathtt{C.input.u}\left( t \right) \\
+\mathtt{C.y}\left( t \right) = \mathtt{C.output.u}\left( t \right) \\
+\mathtt{C.y}\left( t \right) = \mathtt{C.k} \mathtt{C.u}\left( t \right) \\
+\end{array}
+\right]
+\end{equation}