add interpolate option to volume

[SimonDanisch]

Feature for https://discourse.julialang.org/t/how-to-unsmooth-glmakie-volume-plot/107659/3

using GLMakie

f, ax, pl = volume([0; 0; 0;; 0; 0; 0;; 0; 0; 0;;;
        0; 0; 0;; 0; 1; 0;; 0; 0; 0;;;
        0; 0; 0;; 0; 0; 0;; 0; 0; 0];  interpolate=false, axis=(; type=Axis3, title="interpolate=false"))

volume(f[1, 2], [0; 0; 0;; 0; 0; 0;; 0; 0; 0;;;
        0; 0; 0;; 0; 1; 0;; 0; 0; 0;;;
        0; 0; 0;; 0; 0; 0;; 0; 0; 0]; interpolate=true, axis=(; type=Axis3, title="interpolate=true"))
f

[MakieBot]

Compile Times benchmark

Note, that these numbers may fluctuate on the CI servers, so take them with a grain of salt. All benchmark results are based on the mean time and negative percent mean faster than the base branch. Note, that GLMakie + WGLMakie run on an emulated GPU, so the runtime benchmark is much slower. Results are from running:

using_time = @ctime using Backend
# Compile time
create_time = @ctime fig = scatter(1:4; color=1:4, colormap=:turbo, markersize=20, visible=true)
display_time = @ctime Makie.colorbuffer(display(fig))
# Runtime
create_time = @benchmark fig = scatter(1:4; color=1:4, colormap=:turbo, markersize=20, visible=true)
display_time = @benchmark Makie.colorbuffer(fig)

	using	create	display	create	display
GLMakie	3.83s (3.77, 3.86) 0.03+-	445.27ms (425.11, 459.68) 11.54+-	530.43ms (513.46, 567.51) 18.58+-	8.39ms (8.24, 8.53) 0.11+-	26.69ms (26.43, 27.08) 0.20+-
master	3.82s (3.78, 3.87) 0.03+-	448.58ms (434.80, 462.55) 9.65+-	526.66ms (518.24, 541.63) 9.06+-	8.19ms (7.92, 8.41) 0.20+-	26.65ms (26.45, 26.98) 0.20+-
evaluation	1.00x invariant, 0.0s (0.13d, 0.81p, 0.03std)	1.01x invariant, -3.31ms (-0.31d, 0.57p, 10.59std)	0.99x invariant, 3.77ms (0.26d, 0.64p, 13.82std)	0.98x slower X, 0.21ms (1.31d, 0.04p, 0.15std)	1.00x invariant, 0.03ms (0.17d, 0.76p, 0.20std)
CairoMakie	3.25s (3.20, 3.32) 0.04+-	341.60ms (320.93, 384.72) 23.61+-	149.77ms (144.98, 160.33) 5.26+-	8.13ms (7.97, 8.24) 0.12+-	628.45μs (620.52, 635.77) 5.55+-
master	3.24s (3.16, 3.33) 0.07+-	334.98ms (321.64, 350.70) 11.12+-	147.92ms (139.62, 155.91) 5.08+-	7.95ms (7.75, 8.28) 0.16+-	615.28μs (611.35, 621.07) 3.79+-
evaluation	1.00x invariant, 0.01s (0.16d, 0.78p, 0.05std)	0.98x invariant, 6.62ms (0.36d, 0.52p, 17.37std)	0.99x invariant, 1.85ms (0.36d, 0.52p, 5.17std)	0.98x slower X, 0.18ms (1.22d, 0.04p, 0.14std)	0.98x slower X, 13.17μs (2.77d, 0.00p, 4.67std)
WGLMakie	3.91s (3.82, 3.99) 0.07+-	339.16ms (317.27, 357.69) 16.17+-	8.99s (8.73, 9.20) 0.22+-	9.44ms (9.06, 10.07) 0.35+-	71.51ms (68.33, 79.77) 4.47+-
master	3.87s (3.82, 3.93) 0.04+-	334.90ms (321.84, 353.87) 10.24+-	9.01s (8.68, 9.29) 0.23+-	9.70ms (9.16, 11.63) 0.86+-	70.66ms (67.95, 79.12) 4.07+-
evaluation	0.99x invariant, 0.05s (0.85d, 0.14p, 0.06std)	0.99x invariant, 4.27ms (0.32d, 0.57p, 13.21std)	1.00x invariant, -0.02s (-0.10d, 0.85p, 0.22std)	1.03x invariant, -0.26ms (-0.40d, 0.48p, 0.61std)	0.99x invariant, 0.85ms (0.20d, 0.72p, 4.27std)