Category: hou-cops

Archived post by mattiasmalmer

Why i made my own? No real reason. It is fast and has very few options.

I was mostly trying to learn

playing with something called laplacian blend.

it is a really nice way of blending two textures where high and low frequencies in the image are blended at different mip levels so that things blend into oneanother in a really pleasing way.

as you can see there is none of the ghosting that an ordinary soft masks gives you.

it does a really nice job of blending heightfields. you can see that there is no loss of high frequency data and yet there is no discontinuity in height.

try it yourself!

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20252802/22/25/image.png
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20252802/22/25/houdini_T7K8veeuDK.gif
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20252802/22/25/laplacian_blend.hiplc
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20252802/22/25/houdini_9nOteyN3Wv.gif

Archived post by sniperjake945

i had some time this morning so i cooked up a way to do this by just writing a small little rasterizer in vex 🙂

im sure there’s a better way to do it

yeah i see what you’re sayin 😦 im unsure how to change the voxel size without just making a new volume….

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254801/08/25/comp.mp4
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254801/08/25/jr_tiny_rasterizer.hiplc

Archived post by mattiasmalmer

just brute force grabbing eaach matrix component

not sure why i need to do the minus sign in Y tho… guess some kind of handedness oddity

This one updates much more consistently compared to the vex one and feels really fast.

oops. the UV space was a little wonky there…

add this line

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20244812/28/24/image.png

Archived post by mattiasmalmer

here is a simple vex camera projection if you do feel the need to be overcomplicated. 🙂

this is useful if your pos data comes from a rendering or something.

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20241612/27/24/houdini_0NwyzI106U.mp4
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20241612/27/24/CAMERA_PROJECTION_COPS.hipnc

Archived post by mattiasmalmer

rect should be set to something like how big a part of the stamp ends up within one pixel of the outputted image.

that is a bit of a pita to calculate.

regarding the color picker. if i do an inspect in the viewport the unbelievable bastard has the correct values right there… FRUSTRAPOINTED

can i get those values? no, course not, they are just there to taunt me.

nukes Grade node for Cops

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20242012/02/24/image.png
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20242012/02/24/cop_Malmer.dev.Grade.1.0.hdalc