cqparts _render color prop

README.md

./test.sh

output is:

FreeCAD 0.17, Libs: 0.17R13522 (Git)
Fasteners workbench Loaded
[
  {
    "alphaCutoff": 1,
    "alphaMode": "BLEND",
    "pbrMetallicRoughness": {
      "baseColorFactor": [
        0,
        0,
        1,
        1
      ],
      "metallicFactor": 0.1,
      "roughnessFactor": 0.7
    }
  }
]
[
  {
    "alphaCutoff": 1,
    "alphaMode": "BLEND",
    "pbrMetallicRoughness": {
      "baseColorFactor": [
        0,
        0,
        1,
        1
      ],
      "metallicFactor": 0.1,
      "roughnessFactor": 0.7
    }
  }
]

Note: both are blue, but c1 should be green

test.py

from cqparts_misc.basic.primatives import Box
from cqparts.params import *
from cqparts.display.material import COLOR

class Case(Box):
    color = String('red')
    def initialize_parameters(self):
        self._render.color = COLOR[self.color]

# Create Objects
c1 = Case(color='green')
c2 = Case(color='blue')

# Export
c1.exporter('gltf')('c1.gltf')
c2.exporter('gltf')('c2.gltf')

test.sh

#!/usr/bin/env bash

python test.py

cat c1.gltf | jq '.materials'
cat c2.gltf | jq '.materials'