 |
Author |
Topic: Texture quad (Read 690 times) |
|
skloopy
|
Texture quad
« on: Jan 24th, 2003, 11:30am » |
|
Hi
Does proce55ing allow for mapping an image to a quad in 3d? I was checking the reference but i didn't see how or if it's possible... If not, what is the fastest way to do that in Proce55ing?
|
|
|
|
|
fry
|
Re: Texture quad
« Reply #1 on: Jan 24th, 2003, 2:49pm » |
|
the commands are: textureImage(Bimage theImage); and then vertexTexture(x, y); just before any calls to vertex() while drawing your shape.. only really works inside beginShape()/endShape().
textureImage sets the image to be used, and vertexTexture says what x, y coord of the image is assigned to that vertex.
Code:beginShape(QUADS);
textureImage(image);
vertexTexture(u1, v1); vertex(x1, y1);
vertexTexture(u1, v2); vertex(x1, y2);
vertexTexture(u2, v2); vertex(x2, y2);
vertexTexture(u2, v1); vertex(x2, y1);
endShape(); |
|
where the u/v coords are relative to the width/height of the image.
|
| « Last Edit: Jan 24th, 2003, 2:50pm by fry » |
|
|
|
|
skloopy
|
Re: Texture quad
« Reply #2 on: Jan 24th, 2003, 6:27pm » |
|
So then to make a textured triangle strip you would write
beginShape(TRIANGLE_STRIP);
textureImage(im)
vertexTexture(u1, v1); vertex(x1, y1);
vertexTexture(u1, v2); vertex(x1, y2);
vertexTexture(u2, v2); vertex(x2, y2);
vertexTexture(u2, v1); vertex(x2, y1);
endShape();
Right?
I'm guessing it's not possiible to change the texture afterward, is it?
THanks!
|
| « Last Edit: Jan 24th, 2003, 6:41pm by skloopy » |
|
|
|
|
fry
|
Re: Texture quad
« Reply #3 on: Jan 24th, 2003, 7:47pm » |
|
yep, something like that.
can't change afterward since you set the textureImage beforehand.. so only once per beginShape()/endShape()
but there's nothing to keep you from changing to a different image next time you come through loop(), though it'd be flicker city if not done right.
|
|
|
|
|
skloopy
|
Re: Texture quad
« Reply #4 on: Jan 25th, 2003, 7:11pm » |
|
Okay, cool. Thanks!
|
|
|
|
|
|
