briend

SDK = xcrun -sdk macosx

all: compute.metallib compute

compute.metallib: Compute.metal
	# Metal intermediate representation (.air)
	$(SDK) metal -c -Wall -Wextra -std=osx-metal2.0 -o /tmp/Compute.air $^
	# Metal library (.metallib)
	$(SDK) metallib -o $@ /tmp/Compute.air

briend

import colour
import numpy as np
import matplotlib
import matplotlib.pyplot as plt

color = np.array((1.00, 0.95, 0.90))


_WGM_EPSILON = 0.0001

briend

#this outputs 4 horizontal gradients in this order:
#spectral weighted geometric mean
#spectral arithmetic mean (normal)
#RGB weighted geometric mean
#RGB normal
#The illuminant is not weighted properly so these are incredibly bright
#also Meng does not constrain to <=1.0 so many RGB values will violate energy conservation
#Curiously the results are better without adapting samples to E before Meng recovery, and using D65 illuminant
#I think Meng would be better if we could intentionally bake the illuminant into the reflectance; choose D65, etc.

briend

# Draw cairo in a pyglet window - without an intermediate image file.

import ctypes
#import cairocffi as cairo # example will work with cairocffi instead too
import cairo
import time

from pyglet import app, clock, font, gl, image, window

WIDTH, HEIGHT = 400, 400