[x3d-public] Appearance of Geometry in HTML

[Roy Walmsley]

HI Leonard,

 

I’m having trouble understanding (due to my inexperience) why you wouldn’t need an ImageTexture node. I’m hoping you can help me here.

 

Consider the following simple example.

 

I have a cube, and want to use an image as a texture. I’m doing this in an X3D scene graph incorporated into an HTML listing. I can easily specify the Box node for the shape. How would I specify the texture image as CSS?

 

My partial listing might be:

 

<Shape>

  <Box></Box>

  <ImageTexture url=’”myImage.png”’></ImageTexture>

</Shape>

 

Your proposal suggests that the HTML portion might be:

<Shape class=”myBoxClass”>

  <Box></Box>

</Shape>

 

What would go into the CSS portion to call up the image?

 

Shape.myBoxClass {

????

}

 

Thanks in advance,

 

Roy

 

From: x3d-public [mailto:x3d-public-bounces at web3d.org] On Behalf Of Leonard Daly
Sent: 14 August 2017 16:21
To: X3D Public <x3d-public at web3d.org>
Subject: [x3d-public] Appearance of Geometry in HTML

 

If HTML/CSS world, the appearance of an element is (ideally) set in the appropriate style definitions for the element using a combinations of classes, ids, tags, and hierarchy. This includes it's edge effects (border style, corner rounding, padding) and internal appearance (color, background color, gradients, fonts, etc.). 

Using the same environment (HTML/CSS) and adding the 3D dimension (and maybe second cameras, markers, etc.) should the appearance of objects (geometry) be controlled by the appropriate style definitions? Why or why not?

If CSS+1D style definitions are used, then there is no need to any appearance nodes (Material, ImageTxture, etc.). It might be done as <Shape class='sign speedLimit'><IndexedFaceSet ...></Shape>. The classes would add the black border, yellow background, text color, etc.

The disadvantage is that some geometries may be require an extremely complex vertex (or face) assignment for this to be practical.

This method does align nicely with HTML and allows HTML tools and concepts to be carried over to 3D/VR/AR/xR.

 

-- 
Leonard Daly
3D Systems & Cloud Consultant
LA ACM SIGGRAPH Chair
President, Daly Realism - Creating the Future 

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