Proposal / Discussion Logo (#44)

* propose a logo.
* add pngs.
* Add favico.
* rename logos.
* Move assets for docs.
* Generate logos with transparent backgrounds.
* Add a changelog entry.
* Bump version.

Changelog.md

@@ -5,6 +5,12 @@ All notable changes to this Julia package will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.3.12] September 5, 2024
+
+### Added
+
+* an individual logo that still resembles the `Manifolds.jl` family but also features a ∂.
+
 ## [0.3.11] August 28, 2024
 
 ### Changed

Project.toml

@@ -1,7 +1,7 @@
 name = "ManifoldDiff"
 uuid = "af67fdf4-a580-4b9f-bbec-742ef357defd"
 authors = ["Seth Axen <[email protected]>", "Mateusz Baran <[email protected]>", "Ronny Bergmann <[email protected]>"]
-version = "0.3.11"
+version = "0.3.12"
 
 [deps]
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"

assets/logo_diff.jl

@@ -0,0 +1,206 @@
+using Manifolds, LinearAlgebra, PGFPlotsX, Colors, Contour, Random
+
+#
+# Settings
+#
+dark_mode = true
+
+line_offset_brightness = 0.25
+patch_opacity = 1.0
+interface_patch_opacity = 0.66
+#geo_opacity = dark_mode ? 0.66 : 0.5
+geo_opacity = 0.66
+geo_line_width = 30
+mesh_line_width = 5
+mesh_opacity = dark_mode ? 0.5 : 0.7
+logo_colors = [(77, 100, 174), (57, 151, 79), (202, 60, 50), (146, 89, 163)] # Julia colors
+
+rgb_logo_colors = map(x -> RGB(x ./ 255...), logo_colors)
+rgb_logo_colors_bright =
+    map(x -> RGB((1 + line_offset_brightness) .* x ./ 255...), logo_colors)
+rgb_logo_colors_dark =
+    map(x -> RGB((1 - line_offset_brightness) .* x ./ 255...), logo_colors)
+
+out_file_prefix = dark_mode ? "logo-diff-dark" : "logo-diff"
+out_file_ext = ".svg"
+
+#
+# Helping functions
+#
+polar_to_cart(r, θ) = (r * cos(θ), r * sin(θ))
+cart_to_polar(x, y) = (hypot(x, y), atan(y, x))
+normal_coord_to_vector(M, x, rθ, B) = get_vector(M, x, collect(polar_to_cart(rθ...)), B)
+normal_coord_to_point(M, x, rθ, B) = exp(M, x, normal_coord_to_vector(M, x, rθ, B))
+
+function plot_normal_coord!(ax, M, x, B, rs, θs; ncirc = 9, options = Dict(), kwargs...)
+    for r in rs[2:(end - 1)]
+        push!(
+            ax,
+            Plot3(
+                options,
+                Coordinates(map(θ -> Tuple(normal_coord_to_point(M, x, [r, θ], B)), θs)),
+            ),
+        )
+    end
+    for θ in range(0, 2π; length = ncirc)
+        push!(
+            ax,
+            Plot3(
+                options,
+                Coordinates(map(r -> Tuple(normal_coord_to_point(M, x, [r, θ], B)), rs)),
+            ),
+        )
+    end
+    return ax
+end
+
+function plot_patch!(ax, M, x, B, r, θs; options = Dict())
+    push!(
+        ax,
+        Plot3(
+            options,
+            Coordinates(map(θ -> Tuple(normal_coord_to_point(M, x, [r, θ], B)), θs)),
+        ),
+    )
+    return ax
+end
+
+function plot_geodesic!(ax, M, x, y; n = 100, options = Dict())
+    γ = shortest_geodesic(M, x, y)
+    T = range(0, 1; length = n)
+    push!(ax, Plot3(options, Coordinates(Tuple.(γ.(T)))))
+    return ax
+end
+
+#
+# Prepare document
+#
+resize!(PGFPlotsX.CUSTOM_PREAMBLE, 0)
+push!(PGFPlotsX.CUSTOM_PREAMBLE, raw"\pgfplotsset{scale=6.0}")
+push!(PGFPlotsX.CUSTOM_PREAMBLE, raw"\usetikzlibrary{arrows.meta}")
+push!(PGFPlotsX.CUSTOM_PREAMBLE, raw"\pgfplotsset{roundcaps/.style={line cap=round}}")
+push!(
+    PGFPlotsX.CUSTOM_PREAMBLE,
+    raw"\pgfplotsset{meshlinestyle/.style={dash pattern=on 1.8\pgflinewidth off 1.4\pgflinewidth, line cap=round}}",
+)
+if dark_mode
+    push!(PGFPlotsX.CUSTOM_PREAMBLE, raw"\pagecolor{black}")
+end
+S = Sphere(2)
+
+center = normalize([1, 1, 1])
+x, y, z = eachrow(Matrix{Float64}(I, 3, 3))
+γ1 = shortest_geodesic(S, center, z)
+γ2 = shortest_geodesic(S, center, x)
+γ3 = shortest_geodesic(S, center, y)
+p1 = γ1(1)
+p2 = γ2(1)
+p3 = γ3(1)
+
+#
+# Setup Axes
+if dark_mode
+    tp = @pgf Axis({
+        axis_lines = "none",
+        axis_equal,
+        view = "{135}{35}",
+        zmin = -0.05,
+        zmax = 1.0,
+        xmin = 0.0,
+        xmax = 1.0,
+        ymin = 0.0,
+        ymax = 1.0,
+    })
+else
+    tp = @pgf Axis({
+        axis_lines = "none",
+        axis_equal,
+        view = "{135}{35}",
+        zmin = -0.05,
+        zmax = 1.0,
+        xmin = 0.0,
+        xmax = 1.0,
+        ymin = 0.0,
+        ymax = 1.0,
+    })
+end
+rs = range(0, π / 5; length = 6)
+θs = range(0, 2π; length = 100)
+
+#
+# Plot manifold patches
+patch_colors = rgb_logo_colors[2:end]
+patch_colors_line = dark_mode ? rgb_logo_colors_bright[2:end] : rgb_logo_colors_dark[2:end]
+base_points = [p1, p2, p3]
+basis_vectors = [log(S, p1, p2), log(S, p2, p1), log(S, p3, p1)]
+# Patches: 1=red, left, 2=green, top, 3=violet, right
+# Interface patches
+#=
+for i in [2,]
+    b = base_points[i]
+    B = DiagonalizingOrthonormalBasis(basis_vectors[i])
+    basis = get_basis(S, b, B)
+    optionsP = @pgf {
+        fill = patch_colors[i],
+        draw = "none",
+        opacity = interface_patch_opacity,
+}
+    plot_patch!(tp, S, b, basis, π / 5, θs; options = optionsP)
+    optionsP =
+        @pgf {
+            fill = dark_mode ? "black" : "white",
+            draw = "none",
+            opacity = 1.0,
+        }
+    plot_patch!(tp, S, b, basis, 0.75 * π / 5, θs; options = optionsP)
+end
+=#
+# Manifold patches
+for i in [1, 3] # green
+    x = base_points[i]
+    B = DiagonalizingOrthonormalBasis(basis_vectors[i])
+    basis = get_basis(S, x, B)
+    optionsP = @pgf {fill = patch_colors[i], draw = "none", opacity = patch_opacity}
+    plot_patch!(tp, S, x, basis, π / 5, θs; options = optionsP)
+    optionsL = @pgf {
+        meshlinestyle,
+        color = dark_mode ? "white" : "black",
+        line_width = mesh_line_width,
+        opacity = mesh_opacity,
+    }
+    plot_normal_coord!(tp, S, x, basis, rs, θs; options = optionsL)
+end
+
+#
+# Plot geodesics
+options = @pgf {
+    opacity = geo_opacity,
+    "meshlinestyle",
+    no_markers,
+    roundcaps,
+    line_width = geo_line_width,
+    #color = dark_mode ? "white" : "black",
+    color = rgb_logo_colors[1],
+}
+plot_geodesic!(tp, S, base_points[1], base_points[2]; options = options)
+plot_geodesic!(tp, S, base_points[1], base_points[3]; options = options)
+plot_geodesic!(tp, S, base_points[2], base_points[3]; options = options)
+# Text labels
+
+push!(
+    tp,
+    raw"\node [scale=60, yshift=.0325cm, xshift=.03cm, color=" *
+    "$(dark_mode ? "white" : "black")] at ($(p2[1]), $(p2[2]), $(p2[3])) " *
+    raw"{$\partial$};",
+)
+#push!(
+#    tp,
+#    raw"\node [scale=40, color=" *
+#    "$(dark_mode ? "white" : "black")] at ($(p3[1]), $(p3[2]), $(p3[3])) " *
+#    raw"{$\partial$};",
+#)
+#
+# Export Logo.
+out_file = "$(out_file_prefix)$(out_file_ext)"
+pgfsave(out_file, tp)
+pgfsave("$(out_file_prefix).pdf", tp)

docs/src/assets/browserconfig.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square150x150logo src="/mstile-150x150.png"/>
+            <TileColor>#da532c</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>