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-- Ported from the Python code of Mark Ransom
-- https://stackoverflow.com/a/40231268
-- For more on the magic numbers, see
-- http://brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html

ColorConvert = {}
ColorConvert.__index = ColorConvert

setmetatable(ColorConvert, {
    __call = function (cls, ...)

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local x = Point(1, 2)

for key, value in pairs(getmetatable(x)) do
    print(key, value)
end

print(x + Point(3, 4))
print(x * 5)

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local dlg = Dialog { title = "Alt Hotkeys" }

dlg:button {
    id = "a",
    text = "&ABC",
    onclick = function()
        app.alert("A")
    end
}

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import bpy
import math
from mathutils import Vector

grease_data = bpy.data.grease_pencils.new("Stroke")
grease_layers = grease_data.layers
active_layer = grease_layers.new("Layer")
grease_frames = active_layer.frames
active_frame = grease_frames.new(
    bpy.context.scene.frame_current,

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import bpy
from mathutils import Vector


cam_data = bpy.data.cameras.new("Camera")
cam_data.type = 'ORTHO'
cam_data.ortho_scale = 4.0

cam_obj = bpy.data.objects.new(cam_data.name, cam_data)
cam_obj.location = (10.0, 10.0, 5.0)

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shader closureExample(
    normal Normal = N,

    float DiffuseRoughness = 0.01,
    color DiffuseColor = 0.0,
    
    float GlassRoughness = 0.125,
    float GlassIor = 1.45,
    float GlassReflectivity = 0.125,
    color GlassColor = 1.0,

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float zigzag(float t) {
    float a = t * 0.5;
    float b = a - floor(a);
    return 1.0 - abs(b + b - 1.0);
}

float oscillate(float t) {
    return 0.5 + 0.5 * sin(M_PI * (t - 0.5));
}

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shader modScalar(
  float A = 0.0,
  float B = 1.0,

  output float Mod = 0.0) {

    Mod = mod(A, B);
}

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shader fractScalar(
    float A = 0.0,
    
    output float Fract = 0.0,
    output int Trunc = 0.0,
    output float Floor = 1.0) {
    
    Trunc = trunc(A);
    Fract = A - Trunc;
    Floor = 1.0 - Fract;

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shader mixLab(
    color A = 0.0,
    color B = 1.0,
    float T = 0.5,
    color LB = 0.0,
    color UB = 1.0,

    output color Color = 0.5) {

    color aLinear = sRgbTolRgb(A);