1)I know it may not be... but I was just wondering if you can modify global parameters in the shaders... For example I wannna do a waving effect per vertex, and need different angles at each frame, oh and last time I wasn`t able to modify any, gotta check back when I have the time
2)In the fragment`s color.w relyes it`s curent depth right ? I was wondering about doing some depth blur or blur generally, although I don`t really know what do with that component...
Vertex/Fragment Programs
514
January 19, 2005 03:28 PM
1) no, within a program you can't "write" to program parameters. They're read-only.
2) color.w is the fourth component of the color, thus alpha. Depth is a separate thing. See issues #6 and #7 of the ARB_fp spec.
2) color.w is the fourth component of the color, thus alpha. Depth is a separate thing. See issues #6 and #7 of the ARB_fp spec.
5,051
January 20, 2005 05:05 AM
Quote: Original post by vincoof
...another "more complete" shader debugger software ?
That's it. I heard the tool could simulate the GPU but that's not what I'm asking for however.
Previously "Krohm"
January 20, 2005 06:20 AM
Shit, I wrote Color.w (yeah offcourse it`s alpha, damn I was so stupid/confused). I meant 'Position.w', I`ve seen in some thingyes it`s only 1, but does it hold the depth or is there anything else that holds depth ?
Relative Games - My apps
514
January 20, 2005 09:44 PM
Quote: Original post by KrohmQuote: Original post by vincoof
...another "more complete" shader debugger software ?
That's it. I heard the tool could simulate the GPU but that's not what I'm asking for however.
Alright, then I don't know of any shader debugger this advanced.
Quote: Original post by cippyboy
Shit, I wrote Color.w (yeah offcourse it`s alpha, damn I was so stupid/confused). I meant 'Position.w', I`ve seen in some thingyes it`s only 1, but does it hold the depth or is there anything else that holds depth ?
Granted that position can be checked in the framgent program (I'm not sure it is), position.w is the W component, which is not the depth. Depth would rather be position.z but still is a bit far from what can be called "depth" (as of frustums, depth ranges, and such).
January 21, 2005 05:36 AM
fragment depth as in what it returns if we would call 'glreadpixels' and return the depth component at that pixel... Anyways, I dropped the shaders for a while
By the way, do you happen to know where I can find some Dot3 vertex/fragment shader ?
Like I have a diffuse texture, and a normal map,and I want 'Normal Mapping' :D , I have some code but it gets computed kind of nasty... should I post the vertex/fragment programs and/or pic ?
By the way, do you happen to know where I can find some Dot3 vertex/fragment shader ?
Like I have a diffuse texture, and a normal map,and I want 'Normal Mapping' :D , I have some code but it gets computed kind of nasty... should I post the vertex/fragment programs and/or pic ?
Relative Games - My apps
514
January 21, 2005 02:26 PM
normal mapping is really straight-forward with ARB_vp/fp. You shouldn't encounter any real problems with them.
Google the web I guess you will find lots of progs/tuts about that.
Google the web I guess you will find lots of progs/tuts about that.
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