Hi. I'm looking into implementing light clustering and culling in my renderer. To get the cluster depth slice for a given pixel, you need to linearise gl_fragCoord.z before plugging it into one of the functions mentioned here (interactively shown here).
This linearisation function written by the above author is here and I've graphed it here. When gl_fragCoord.z is 0 it equals zNear and when it is 1 it equals zFar.
The problem is that I'm using an infinite Z perspective matrix (as mentioned here) and don't have a far plane, so it's not possible for me to write a linearisation function like this. Any ideas of what I can do instead?
I'm working on a wireframe renderer for learning purposes. One point of confusion is the perspective matrix. I could just divide X and Y by Z, but I am using the OpenGL pipeline as a guide so I am dividing the XYZ components by W after assigning Z to W using a perspective matrix. The matrix I am using is basically the same as the simple one here. The question I have is what is the use of having a non-zero coefficient in the Z column if only W is used in the end? For my use, only the -1 coefficient in Z-th index of the W column matters, and in practice that and the last index of the W column are the only two that are useful by giving a way put a mixture of the previous W=1 and Z into W.
The matrices that are described do a lot of scaling to Z, so where is Z used further down the pipeline after perspective divide, does it involve clipping? It might be my simple implementation, but I have no use for Z after applying the perspective matrix, and even that step is a little formal since I am only using W to divide by Z.
Thanks for any info
I am trying to make a 3 Dimensional Graph between variables "x, y and w", and color this graph according to values of "z" :
library(plotly)
library(dplyr)
X <- seq(0,3.1,0.1)
Y <- seq(0,3.1,0.1)
W <- seq(0,3.1,0.1)
DF <- expand.grid(X,Y, W)
#Compute variable for colors
DF$Z <- sin(DF$Var1) + cos(DF$Var2) + sin(DF$Var3)
#make a matrix of color values
Mat <- matrix(DF$Z,nrow = 32)
#make a matrix for z values
#had real data.
Mat2 <- matrix(rep(c(1:16,16:1),32),nrow=32)
plot_ly(y=~Y,x=X, z=~W) %>%
add_surface(surfacecolor=~Mat)
But this produces an error:
Error: `z` must be a numeric matrix
Can anyone please show me how to fix this problem?
Thanks
T I M E S T A M P
| item_________ | short description | asking price________ |
|---|---|---|
| Zenith Z150 (skcl green) | Excellent exterior condition (save for one missing rubber pad on the back). The switches are also top notch, extremeley smooth and really nice sounding. 9+/10 condition. here is a sound check of the board | $240 shipped CONUS (OBO) |
| Fox Labs F80SE | I have another fox labs board in e-white being delivered in a couple of days (TIME80-RE)that I feel will take the place of this one in my arsenal. It is built with lubed and filmed silent ghost switches (linear)that are a joy to type on. Caps are JTK stormtrooper and are included in the trade/sale. here's a sound check of the board | trade towards matrix 1.2 / 2.0 (or $850 shipped) |
I'm mainly looking for the following:
- Lilac/pink/purple xmas matrix 2.0 add
- Lilac/pink matrix 1.2 OG
If you're interested in the f80se and would like to work something else out (like without the caps or something) please send me a message - even though trading is my preference, I am still willing to field monetary offers. Thanks for taking a look and stay safe!
I have an optimized dimer and need to perform calculations that involve manipulating the inter-moiety bond. I have the C1, C2, etc. labels from Avogadro and the dihedral angles D1, D2, etc. in my z-matrix but am unsure how to identify, for example, the specific dihedral angle that corresponds to C7, C8, C4, and S1. I've never used Reddit before and am unsure how to attach the screenshots that might be helpful, but does anyone have any pointers?
Hi All
I'm using a rhino model to generate 2d CNC paths via make2d for an architectural model. After I rotate all my walls (pre-make 2d) it would be very handy to have a way to:
-
align all the objects en masse to the C-plane or Z=0. I played with SetPt, but it seems to collapse all the control points to zero as well.
-
instead of distribute X or distribute Y, it would be great if you could create a distribution on X AND Y (for better CNC cutting) I couldnt figure out how to naturally do this with a disordered group of objects.
Does anyone know of any commands built in, or rhinoscripts that accomplish either of these functions? It seems wierd that this ability is missing in a program as robust as Rhino.
Hi Hardware Swap
I am looking for one of these three 2080 tis ROG Matrix Platinum, Aorus or the MSI Lighting Z. I am not interested in the Kingpin as I do not want to deal with another radiator and a Kingpin will not get me into the cool kids club nor the Alpha male hierarchy. In all seriousness I prefer the design of these cards.
As for the board, I want something like a Maximus, Aorus Master, Ace, Xtreme or Godlike. I want an awesome motherboard for a 9900k.
Please comment before PM and thanks for reading!
2009 Matrix (94k) $8,000
https://www.stcharlestoyota.net/used-St+Charles-2009-Toyota-Matrix-Base-2T1KU40EX9C133528
2010 Outback (127k) $8,500
https://www.stcharlestoyota.net/used-St+Charles-2010-Subaru-Outback-25+premium-4S4BRCGC3A3343283
2011 CR-Z (61k) $8,645
https://www.myprestigeimports.com/2011_Honda_CRZ_St%20Charles_IL_45351347.veh
I am split between these three choices. I'm definitely leaning more toward the Matrix and the Outback, I feel like those will last for a lot longer mileage. I know the Honda has the least amount of mileage, but I am unsure of how long it will ultimately last. I've been wanting an Outback for a while now, but I mostly just want a reliable hatchback. Any questions or comments are very appreciated. Thank you!
Hi all, cleaning out some extra parts today, this is going to be a long one
- 2080 ti Matrix Platinum this is the ASUS 2080 ti with a built-in AIO. Pretty rare card and powerful too. Card is in like new condition, (still haven't peeled off the front plastic). I have all the original packaging and paper work. Never overclocked so I don't really know how far the clocks will go. $1700 + shipping. Feel free to let me know if the pricing is off on this one Timestamps
- Razor Core X external gpu enclosure, this is the 2018 model, so no Chroma lighting. Item is in like new condition, used only once to test out a GPU. Now it's sitting in a box collecting dust. Will come with all original packaging. $215 + shipping Timestamps
- Auros X470 Gaming 7 bought this board during Ryzen 3 launch. BIOs flashed to F41, tested with both 3600X and 3700X, running flawlessly. Will come with all original packaging and accessories. This board also has micro center 2-year replacement plan, transferable. $170 + shipping Timestamps
- X399 Zenith Extreme bought last winter, mint condition, still have 2 more years of warranty left. Awesome RAM overclocking performance, pushed 8 sticks of dual rank 128 GB trident z royal to 3600 cl16 super stable with both 1950X and 2950X. $320 + shipping Timestamps. Pending local
- MEG X399 Creation second X399 board, monster VRM. MSI did a great job with IOMMU grouping, will also come with the MSI Aero PCIE ssd riser card. $320 + shipping Timestamps
- Noctua NH-U14S TR4-SP3 + heat sink cover selling these together, will come with all original packaging. $65 + shipping Timestamps Pending local
- Noctua NH-U12S TR4-SP3 smaller version of the U14S. $40 + shipping Timestamps
Always wanted a rare 1080 ti card, Kingpin/Lightning Z/Poseidon in that order. Also planning to upgrade to X570 platform for PCIE 4.0 SSD support. However, only interested in Aorus Master/Xtreme or ASUS Crosshair VIII Hero/Formula. Shoot me y
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