Lyrid
08-24-2007, 02:38 PM
Hi,all
Did you ever found that the "lightDirection" attribute of LightInfo node never update automaticlly when you change the light direction in the scene. Following is what I done:
1. first connected the "worldMatrix" of light (say light1) to the "worldMatrix" attribute of LightInfo.
2. then I connected "lightDirection" directly to the "ambient color" of lambert, and turn off the intensity of light1. (that's mean only get what the "lightDirection" looks like).
3. I changed the light direction, but the output ambient color didn't change at the same time until I mannually reconnected the link between "lightDirection" and "ambient color"!
4. but if I connect "lightPosition" to "ambient color", it will update in realtime whenever you move the light.
Why? LightInfo prefer "position" than "direction"? I found the same problem in Maya7.0 and 8.5.
Help me, Thanks!
PS: of course light1 is not point light.
Did you ever found that the "lightDirection" attribute of LightInfo node never update automaticlly when you change the light direction in the scene. Following is what I done:
1. first connected the "worldMatrix" of light (say light1) to the "worldMatrix" attribute of LightInfo.
2. then I connected "lightDirection" directly to the "ambient color" of lambert, and turn off the intensity of light1. (that's mean only get what the "lightDirection" looks like).
3. I changed the light direction, but the output ambient color didn't change at the same time until I mannually reconnected the link between "lightDirection" and "ambient color"!
4. but if I connect "lightPosition" to "ambient color", it will update in realtime whenever you move the light.
Why? LightInfo prefer "position" than "direction"? I found the same problem in Maya7.0 and 8.5.
Help me, Thanks!
PS: of course light1 is not point light.