Can I obtain the brightness of a coordinate point on the picture using the REQUEST command?

[yongler]

May I ask how to use REQUEST {2}?

Can I obtain the brightness of a coordinate point on the picture using the REQUEST {2} command?

The brightness or red, green, and blue values of the coordinate points on the picture.

GDL seems to have relatively weak processing power for pictures.

[Barry Kelly]

You can request the RGB of a pen or material (surface) as these are a single colour, but not of a picture.

Every pixel of a picture could be a different colour.

Archicad just imports the picture you tell it to, and as far as I know there is no way to interrogate the colour of individual pixels.

Barry.

[yongler]

Okay, there's still a little disappointment

[Barry Kelly]

When you say 'Picture' I assume you are meaning an image file (.jpg, .tif, .png, etc).

Barry.

[Lingwisyer]

I assume this has got to do with using gradients to control dynamic objects?

[Pertti Paasky]

You can try to convert the bitmap file to a .txt file that a GDL object can read.

But that means a lot of work. 

[Lingwisyer]

...And very non user friendly...