等效于红色的 Rebol 效果 [渐变]？

Question

我在 Google 上进行了搜索，但在 Rebol 中找不到与此等效的任何 Red 示例： http://www.rebol.com/view/demos/gradient.r

view layout [
    style box box 64x64
    across backdrop 0.50.0
    vh1 "Gradient Examples"
    below guide
    box effect [gradient]
    box yellow effect [gradient]
    box effect [gradient 200.0.0]
    box yellow effect [gradient 200.0.0]
    box effect [gradient 200.0.0 0.0.200]
    return
    box effect [gradient 1x0]
    box yellow effect [gradient 1x0]
    box effect [gradient 1x0 200.0.0]
    box yellow effect [gradient 1x0 200.0.0]
    box effect [gradient 1x0 200.0.0 0.0.200]
    return
    box effect [gradient -1x0]
    box yellow effect [gradient -1x0]
    box effect [gradient -1x0 200.0.0]
    box yellow effect [gradient -1x0 200.0.0]
    box effect [gradient -1x0 200.0.0 0.0.200]
    return
    box effect [gradient 0x1]
    box yellow effect [gradient 0x1]
    box effect [gradient 0x1 200.0.0]
    box yellow effect [gradient 0x1 200.0.0]
    box effect [gradient 0x1 200.0.0 0.0.200]
    return
    box effect [gradient 0x-1]
    box yellow effect [gradient 0x-1]
    box effect [gradient 0x-1 200.0.0]
    box yellow effect [gradient 0x-1 200.0.0]
    box effect [gradient 0x-1 200.0.0 0.0.200]
    return
    box effect [gradient 1x1]
    box yellow effect [gradient 1x1]
    box effect [gradient 1x1 200.0.0]
    box yellow effect [gradient 1x1 200.0.0]
    box effect [gradient 1x1 200.0.0 0.0.200]
    return
    box effect [gradient -1x1]
    box yellow effect [gradient -1x1]
    box effect [gradient -1x1 200.0.0]
    box yellow effect [gradient -1x1 200.0.0]
    box effect [gradient -1x1 200.0.0 0.0.200]
    return
    box effect [gradient 1x-1]
    box yellow effect [gradient 1x-1]
    box effect [gradient 1x-1 200.0.0]
    box yellow effect [gradient 1x-1 200.0.0]
    box effect [gradient 1x-1 200.0.0 0.0.200]
    return
    box effect [gradient -1x-1]
    box yellow effect [gradient -1x-1]
    box effect [gradient -1x-1 200.0.0]
    box yellow effect [gradient -1x-1 200.0.0]
    box effect [gradient -1x-1 200.0.0 0.0.200]
]

Answer 1

Red的View还不支持效果管，但是你可以在Draw中设置渐变：

view [base 100x100 draw [fill-pen linear 0.0.0 255.255.255 0x0 100x100 box 0x0 100x100]]

（我在 Linux，所以我无法测试它，但我认为它应该可以工作）。

有关详细信息，请参阅 https://doc.red-lang.org/en/draw.html#_linear_gradient_fill。

等效于红色的 Rebol 效果 [渐变]？

Equivalent of Rebol effect [gradient] in Red?

rebol

red