setUniformTexture from a vector of of Images

@edapx wrote:

Something weird is happening to me on Monday morning.
My problem is, I have a class called “ImageResource” containing a vector of ofImages, and I want to pass one of those images to a shader in my ofApp.

This is the ImageResource class header.

#pragma once
#include "ofMain.h"

class ImageResources
{
public:
    ImageResources();
    void update();
    void setup(); // this is just for test
    ofImage getCurrentImageColor();

    // Images
    vector<ofImage> imageColors;
    ofImage activeImg;
    int textureIndex;
}

Implementation

#include "ImageResources.h"
ImageResources::ImageResources(){}

void ImageResources::setup(){
    // ...
    // fill the imageColors vector
    // ...
    imgIndex = 0;
    activeImg = imageColors.at(imgIndex);
}

void ImageResources::update(){
    // imgIndex may change.
}

ofImage ImageResources::getCurrentImageColor(){
    return imageColors[textureIndex];
}

In my ofApp class I am simply going to use the ImageResources as follow:

        damShader.begin();
        ;
        damShader.setUniformTexture("damImage", imageResources.getCurrentImageColor().getTexture(), 0);
        plane.draw();
        damShader.end();

With a wrong result, it looks like the texture got passed empty:

wrong.jpg800×508 624 KB

If I pass the texture as follows:

        damShader.begin();
        ;
        damShader.setUniformTexture("damImage", imageResources.activeimg.getTexture(), 0);

        plane.draw();
        damShader.end();

It works.

right.jpg800×514 89.5 KB

I have already tried to see if getCurrentImageColor() was not returni any image, but if I draw it to the screen using getCurrentImageColor().getTexture(0,0) it works.

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