United3dArtists Archive

clintonman · Post by **clintonman** » 04 Feb 2020, 21:10

Ramp texture for truespace. Image shows result from 3dbuzz maya fundamentals project 2, the beach ball object.
Both ramps are set for no interpolation and one ramp feeds the other as a texture.

Press init to start out with 2 keys of white for key 0 at position 0 and black for key 1 at position 0.1.
The current color is selected with the previous and next buttons. They cycle through the keys in the order they are created, not their position on the ramp.
To add a new key click in the ramp then change the color with the current color input and the position with the slider. Keys can be added in any order but it's easier next and previous buttons if the keys are added bottom to top or left to right.

Interpolation of 0 means hard lines, no interpolation. 1 means linear interpolation
Type 0 creates a vertical ramp, type 1 is horizontal.

To assign an image to a key press the add texture button, the area of the key will be filled with noise. Switch to the Exp tab to assign the actual texture to be used. When the ramp type is set to 1/horizontal the image will be reversed left for right. Hmm, seems a little broken not working for the last key.
The remove a texture press the remove texture button.

There is no way to remove a key yet.
Don't use the CurrentKey number input, it only works with the previous and next buttons.

clintonman · Post by **clintonman** » 05 Feb 2020, 03:31

Alien eye made with ramp and voronoi texture. Same 3dbuzz project.

trueBlue · Post by **trueBlue** » 05 Feb 2020, 18:50

Awesome Clinton!
Are you able to do something like this?
https://www.google.com/url?sa=t&rct=j&q ... ymwKkyeEcZ

Finis · Post by **Finis** » 05 Feb 2020, 19:05

Good feature for trueSpace! Color ramps are awesome. Blender people use them for an amazing variety of effects. I used a color ramp in Blender to color the ornament particles on the Christmas tree (v ... 999#p56999). Outside the environment background of stars is a noise texture sent through a color ramp.

MikomDude · Post by **MikomDude** » 05 Feb 2020, 22:59

Ohh, yeah ramps are super useful! Couldn't make a material in Blender without one.

clintonman · Post by **clintonman** » 06 Feb 2020, 03:32

trueBlue wrote: 05 Feb 2020, 18:50 Awesome Clinton!
Are you able to do something like this?
https://www.google.com/url?sa=t&rct=j&q ... ymwKkyeEcZ

I don't think so except maybe to make a uv planar projection in the second uv channel and use it in place of the projection node he uses in the video.

trueBlue · Post by **trueBlue** » 08 Feb 2020, 21:11

Wanting to add your Ramp material to the updates.
Does this UI make sense?

clintonman · Post by **clintonman** » 09 Feb 2020, 00:54

trueBlue wrote: 08 Feb 2020, 21:11 Wanting to add your Ramp material to the updates.
Does this UI make sense?
RampUI.PNG

I'll have to get back to you. For now I think Position isn't used, but I'm not sure.
Initiate should be Initialize or Reset
The Next and Previous buttons should be closer to the ramp than the Add and Remove texture buttons. Or maybe Add/Remove should be closer to the color since it replaces the color.
I plan to replace Interpolation and Type with drop down lists
Also plan to add key position indicators.

trueBlue · Post by **trueBlue** » 09 Feb 2020, 02:15

Okay, I'll wait until your finished.

I like the Vertical or Horizontal Combo Control idea!
Wonder though if it should be two different materials?
One for Horizontal and one for Vertical.

Looking at your Ball.RsObj, I'm guessing that it should be a Component verses a Material?

With your Ball.RsObj, I was getting an error from the data script.
Something about the newkey being undifined:

Code: Select all

	var curkey = CurrentKey;
	if(curkey < 9) {
		curkey = "0" + curkey ;
	} else {
		curkey = "" + newkey;
	}

If I remember correctly, I just clicked on the ramp bitmap control.

clintonman · Post by **clintonman** » 09 Feb 2020, 04:05

That reminds me, it's also probably limited to adding less than 10 keys and there's no way to delete keys.

clintonman · Post by **clintonman** » 11 Feb 2020, 06:21

Removed unused Position input
Changed Interpolation and Type from number inputs to word selection inputs.
Added a clickable key indicator - click near to select a key
Added a remove key button - it only works on the last key added
Reset/Clear the texture connection when removing a texture

InterpolationS only valid values are "Linear" and "None"
TypeS only valid values are "V Ramp" and "U Ramp"
Limited to 16 color keys
First 8 keys can be textures

trueBlue · Post by **trueBlue** » 11 Feb 2020, 20:11

Nice! Now I need to figure out how to use it.
Made a U Ramp and V Ramp D3D Materials
Removed due to update

trueBlue · Post by **trueBlue** » 11 Feb 2020, 21:51

U Ramp
With the RampBitmap/Clickable Bitmap Control, I am getting errors!
If I change to code as follows, I do not get errors.

Code: Select all

Node.Value("%THIS_NAME%" + "/add new key" , "Position") = "%MOUSE_X%/" + Node.Value("%THIS_NAME%","SizeX");
color = System.CreateDO("Common Data Package/Color Data");
color.SetRed('%COLOR_R%')
color.SetGreen('%COLOR_G%')
color.SetBlue('%COLOR_B%')
Node.Value("%THIS_NAME%" + "/add new key" , "ColorIn") = color
Activity.Run("%THIS_NAME%" + "/add new key")

clintonman · Post by **clintonman** » 11 Feb 2020, 22:31

trueBlue wrote: 11 Feb 2020, 21:51 U Ramp
With the RampBitmap/Clickable Bitmap Control, I am getting errors!
If I change to code as follows, I do not get errors.
Code: Select all
Node.Value("%THIS_NAME%" + "/add new key" , "Position") = "%MOUSE_X%/" + Node.Value("%THIS_NAME%","SizeX");
color = System.CreateDO("Common Data Package/Color Data");
color.SetRed('%COLOR_R%')
color.SetGreen('%COLOR_G%')
color.SetBlue('%COLOR_B%')
Node.Value("%THIS_NAME%" + "/add new key" , "ColorIn") = color
Activity.Run("%THIS_NAME%" + "/add new key")

That doesn't work. Error must be from something else.

trueBlue · Post by **trueBlue** » 12 Feb 2020, 00:38

For me it is mostly Line 335 Type mismatch when scrubbing the CurrentPosition slider.

: Line 335 Type mismatch.PNG (8.94 KiB) Viewed 4034 times

How about a color picker?

clintonman · Post by **clintonman** » 12 Feb 2020, 01:10

trueBlue wrote: 12 Feb 2020, 00:38 For me it is mostly Line 335 Type mismatch when scrubbing the CurrentPosition slider.
Line 335 Type mismatch.PNG
How about a color picker?
ColorPicker.PNG

I can slide all day long and not get an error. Are you sure there are no other steps to reproduce the error?

trueBlue · Post by **trueBlue** » 12 Feb 2020, 01:14

Maybe if you create a ramp below the highest ramp?
If I just create a few ramps, then I can scrub all day long too!

If I take your button script into a JScript and run a syntax check, you'll see why I suggested a change from the previous post.

clintonman · Post by **clintonman** » 12 Feb 2020, 02:07

trueBlue wrote: 12 Feb 2020, 01:14 Maybe if you create a ramp below the highest ramp?
If I just create a few ramps, then I can scrub all day long too!

If I take your button script into a JScript and run a syntax check, you'll see why I suggested a change from the previous post.
ButtonScript.PNG

%MOUSE%, %COLOR_R% etc. don't work inside scripts. They only work in the script section of the UI tools.
I copied and pasted your earlier code and it didn't work. That's why I said it doesn't work.

What does it mean to create a ramp below the highest ramp? I'm guessing this is giving you errors?

trueBlue · Post by **trueBlue** » 12 Feb 2020, 02:21

Here is the Ramp object with error

clintonman · Post by **clintonman** » 12 Feb 2020, 02:35

Thanks.

clintonman · Post by **clintonman** » 12 Feb 2020, 04:45

Found the problem. The reason for the error was because the MapRange function was trying to divide by zero. This happens when 2 keys have the exact same position. Added a check so it bypasses the division when the start and end of the range are the same value. The function is somewhere around line 500 of the RampDataNode.

Code: Select all

// https://rosettacode.org/wiki/Map_range
function MapRange(val,a1,a2,b1,b2)
{
	if(Math.abs(a2 - a1) < Number.MIN_VALUE) return b1;
	var val2 = Math.min(val,a2);
	s = Math.max(val2, a1);
	return b1 + (s-a1)*(b2-b1)/(a2-a1)
}

It's funny I searched the internet and everyone is giving the same function for mapping a range and no one is checking for the divide by zero error case.

Edit:
side note, if you add a color picker it should be a normal color picker, not the abstract art version of a color picker.

clintonman · Post by **clintonman** » 12 Feb 2020, 06:50

Here the ramp is used to add a blue tint to the lower part of the night sky.

: RampCompressionOff.jpg (46.92 KiB) Viewed 3345 times

The Compression in the material bitmap had to be turned off to get a smooth ramp texture. When on it gave a stair step like change of color.

trueBlue · Post by **trueBlue** » 12 Feb 2020, 17:52

clintonman wrote: 12 Feb 2020, 04:45 Found the problem. The reason for the error was because the MapRange function was trying to divide by zero. This happens when 2 keys have the exact same position. Added a check so it bypasses the division when the start and end of the range are the same value. The function is somewhere around line 500 of the RampDataNode.
Code: Select all
// https://rosettacode.org/wiki/Map_range
function MapRange(val,a1,a2,b1,b2)
{
	if(Math.abs(a2 - a1) < Number.MIN_VALUE) return b1;
	var val2 = Math.min(val,a2);
	s = Math.max(val2, a1);
	return b1 + (s-a1)*(b2-b1)/(a2-a1)
}
It's funny I searched the internet and everyone is giving the same function for mapping a range and no one is checking for the divide by zero error case.

Edit:
side note, if you add a color picker it should be a normal color picker, not the abstract art version of a color picker.

Working great!
Is there anyway you can export out the Texture slots to a Texture aspect, and add a Add/Remove button script?
Edit: I notice that you can add unlimited Textures as it is now. Remove Texture is not working when in this state..

trueBlue · Post by **trueBlue** » 14 Feb 2020, 19:54

Here is my attempt for a Texture UI for your V Ramp as a D3D material

D3D V Ramp material
Add
Luminosity Color Picker

: V Ramp.PNG (16.51 KiB) Viewed 3315 times

init script
Add
Node.ConReset(System.ThisOwner(), "Red");
Node.ConReset(System.ThisOwner(), "Green");
Node.ConReset(System.ThisOwner(), "Blue");
Node.ConReset(System.ThisOwner(), "lum");

RampDataNode
Add
params.ConValue("Current_Key") = CurrentKey;

add texture script
Comment
//Node.ExportConnector(System.ThisOwner() + "/RampDataNode", "Texture" + curkey, "", 1, 1);

remove texture script
Not in use

Texture aspect

RampBitmap / Clickable Bitmap Control
Add
Activity.Run("%THIS_NAME%" + "/add texture")

Use:
First 8 Keys can be textures
LMB click in Ramp Bitmap control to add texture
Ctrl + LMB select Bitmap to change texture
RMB select Reset - Texture @ Key # to remove texture

trueBlue · Post by **trueBlue** » 16 Feb 2020, 19:14

If you remove the 0 key, you will get several errors and you can not continue adding keys.

: Remove Key 0.PNG (10.59 KiB) Viewed 3300 times

: Second errorRemove Key 0.PNG (10.95 KiB) Viewed 3300 times

Adding:

Code: Select all

if(key == 0) return;

to the remove key script seems to work.

clintonman · Post by **clintonman** » 20 Mar 2020, 16:01

Added the ramp textures to my site. It has my original ugly texture and the ramp textures extracted from the ramp materials of the Unofficial Update.

http://clintons3d.com/plugins/truespace ... rials.html

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