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Shader ...time value!

Started by rupeshmandke Jan 8, 2007 at 1:12 AM 4 replies 1k views

Original Post

Jan 8, 2007 at 1:12 AM

i want to give my time value from c++ application to shader program written in HLSL ... how can i go abt it??? my take on this is ... i can store time value from c++ program into constant register ...then assign tht register value to some variable in shader program n access... but here my confusion is ....since time value will b cont. advancing...will it b iterated in constant register as well ... am not sure about this ... but i think i need to do this manually ... :) can any1 put some light on this issue??? if at all i need to change values in registers manually ...how to go abt it?? thx in advance! :)

moagstar

Jan 8, 2007 at 4:01 AM

Just pass the value as a constant, don't worry about the time being exactly accurate for each pixel / vert that is processed, the amount of time passed between the processing is miniscule.

Drazgal

Jan 8, 2007 at 7:28 AM

You should be taking the current time at the start of each game frame and using that value for all time calculations in that frame. Taking a constantly updating time value throughout a frame will only lead to problems.