Cutting a hole in a CardMaker card.

Scripting Issues
1

I’m trying to make a house from cards (procedurally). A card with texture represents a wall, and I want to cut out a window.

cm = CardMaker('card')
cm.setUvRange( Point2( 0, 0 ), Point2( 1, 1 ) )
cm.setFrame( Point3(-60,-60,0), Point3(-60,60,0), Point3(-60,60,40), Point3(-60,-60,40) )
card = render.attachNewNode(cm.generate())
tex = loader.loadTexture('brick.jpg')
card.setTexture(tex)
card.reparentTo(render)

Question: is there a an easy way to cut a hole in a CardMaker card? If only I could somehow see what exactly Egg content this code generates,… Is there a way to see it?

2

Hi

I wonder if you could use a texture with alpha channel and then change those pixels where you want your window to be totally transparent…

3

It worked. However, the corners are blurred… It’s better than nothing, but it would be nice to have a real rectangular hole. So, some questions:

Is there a way to combine several CardMaker cards into a mesh, just like in the case procedurally of triangles (GeomTriangles)?

Is there a way to manipulate the vertices created by CardMaker manually?

4

Try this class :
panda3d.org/reference/1.8.0/ … ulator.php

example :
[polygon triangulation speed)

5

Try setting the transparency mode to MBinary instead of MAlpha.

card.setTransparency(TransparencyAttrib.MBinary)
6

Thank you both. That really worked well!

7

So far, I was generating ‘image.jpg’ from tiles on my own, and then combining it with transparency mapping like this:

cm.setUvRange( Point2( 0, 0 ), Point2( 1, 1) )
...
tex = loader.loadTexture('image.jpg', 'map.jpg')

However, I would like to utilize the card’s property .setUvRange to tile an image, e.g.,

cm.setUvRange( Point2( 0, 0 ), Point2( 5, 5) )

with transparency map defined on Point2( 0, 0 ), Point2( 1, 1) .
Is this possible?

8

You can also use:
np.setTexOffset(self.ts, self.offsetU, self.offsetV)
np.setTexScale(self.ts, sizeCELLS, sizeRAWS)

where:
np.setTexture(self.ts, tex)
self.ts = TextureStage(‘ts’)
self.ts.setMode(TextureStage.MAdd)# or whatever

so set the scale and then use offsetU,V to set the corner.