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Texture Patch

version 1.0 (183 KB) by

Show a 3D triangulated mesh ( patch ) with a texture

4.81818
11 Ratings

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This function PATCHT, will show a triangulated mesh like Matlab function Patch but then with a texture.

patcht(FF,VV,TF,VT,I,Options);

inputs,
FF : Face list 3 x N with vertex indices
VV : Vertices 3 x M
TF : Texture list 3 x N with texture vertex indices
VT : Texture Coordinates s 2 x K, range must be [0..1] or real pixel postions
I : The texture-image RGB [O x P x 3] or Grayscale [O x P]
Options : Structure with options for the textured patch such as
EdgeColor, EdgeAlpha see help "Surface Properties :: Functions"

Options.PSize : Special option, defines the image texturesize for each
individual polygon, a low number gives a more block
like texture, defaults to 64;

note:
On a normal PC displaying 10,000 faces will take about 6 sec.

Example,

% Load Data;
load testdata;
% Show the textured patch
figure, patcht(FF,VV,TF,VT,I);
% Allow Camera Control (with left, right and center mouse button)
mouse3d

Comments and Ratings (22)

is it possible to load multiple images for the texture?

hieu vu

https://www.mathworks.com/matlabcentral/profile/authors/1058872-andrea-tagliasacchi, you have a small problem in here. In Matlab, only surface has property "texturemap". You can not apply 'texturemap' in the patch object directly. The Author has generated the useful code. Thank him so much!

I think this code is now obsolete.
Look at "Example — Texture Mapping a Surface" in the matlab documentation.

Kyle

Kyle (view profile)

Works well. I slightly changed the conversion from texture coordinates to image coordinates to work for my textures.

Previous
67 VT2(:,1)=(size(I,1)-1)*(VT(:,1))+1;
68 VT2(:,2)=(size(I,2)-1)*(VT(:,2))+1;

New Lines
67 VT2(:,1) = (1-VT(:,2))*size(I,1);
68 VT2(:,2) = VT(:,1)*size(I,2);

Ghazal

Ghazal (view profile)

how to get these parameters TF and VT

arun singh

how can we use this function to map texture on a 3D model from a 2D face image.(Point to Point texture map. Only face texture and leave everything else in the 2D image.) .... ?

StellaG

@tn_with_8fusa: Thank you very much! To enable the code on "any" Matlab Version, I made the following adaptation:

x1=sizep; y1=sizep; x2=sizep; y2=0; x3=0 ;y3=0; % original
version_str = version;
index_year = regexp(version_str,'(R');
if str2double(version_str(index_year+2:end-2))>2013
y3=sizep; %new
end

StellaG

Tobias Huber

very good work! Thank you!

In 2014b, there is a problem showing texture.

When 127 line of patcht.m is corrected as follows, this problem is settled.

x1=sizep; y1=sizep; x2=sizep; y2=0; x3=0 ;y3=sizep;

Amir

Amir (view profile)

I would like to know how you calculated VT and why the number of VT is different from VV.

Best
Noureddine

Amir

Amir (view profile)

I did not understand something else in your example is VT why the number of vertices is larger than vv.

Amir

Amir (view profile)

is that this function is limited by a number faces or not

Vinayak

Hi, I cannot understand the following:

1) What is the "TF" variable and how do I create it if I have vertices (VV), trinagles (FF) and texture coordinates (VT)?

2) In your "testdata", I see that the number of texture coordinates in VT are not saem is the number of vertices. However, should that not be the same or am I missing something here?

Your guidance is highly appreciated.

Best,
Vinayak

Gabriel Peyre

Gabriel Peyre (view profile)

This is awesome, I have been looking for such a code for a such a long time. Congrats.

Luca Baglivo

It would be appreciated to change the help with the correct matrix sizes.
A strange thing I found is that it works correctly only if I flip the x and y image coordinate in the matrix, could you check?
Finally, with gray images it show color-mapped texture. The work-around I found is to use three equal layer of gray levels like a color image.

Nikolay Chumerin

Perfect job! Thank you! You saved a lot of my time. Just one remark: in the comments/help you wrongly specified the size of the input matrices FF, VV, TF and VT. They should be transposed.

Paulo

Paulo (view profile)

Dirk-Jan Kroon

Dirk-Jan Kroon (view profile)

*Peter-bone,
You can try to change the figure “Renderer” (painters, z-buffer or OpenGL), after you displayed your textured-object.
set(gcf,'Renderer','OpenGl');

But it can also be a problem with your video-card driver.

Peter Bone

Peter Bone (view profile)

I'm using 2008b. The example did not texture map correctly. I did not get the image shown. Something is wrong.

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