hunt for blend func

gistfile1.txt

// written by Golan Levin 
// for example, huntForBlendFunc(1, -1, -1);

void huntForBlendFunc(float period, int defaultSid, int defaultDid){
    // sets all possible (24) combinations of blend functions,
    // changing modes every period seconds.
    
    int sfact[] = {
        GL_ZERO,
        GL_ONE,
        GL_DST_COLOR,
        GL_ONE_MINUS_DST_COLOR,
        GL_SRC_ALPHA,
        GL_ONE_MINUS_SRC_ALPHA,
        GL_DST_ALPHA,
        GL_ONE_MINUS_DST_ALPHA,
        GL_SRC_ALPHA_SATURATE
    };
    
    int dfact[] = {
        GL_ZERO,
        GL_ONE,
        GL_SRC_COLOR,
        GL_ONE_MINUS_SRC_COLOR,
        GL_SRC_ALPHA,
        GL_ONE_MINUS_SRC_ALPHA,
        GL_DST_ALPHA,
        GL_ONE_MINUS_DST_ALPHA
    };
    
    
    if ((defaultSid == -1) && (defaultDid == -1)) {
        
        int sid =  ((int)(ofGetElapsedTimef()*1000)/(8*(int)(period*1000)))%9;
        int did =  ( (int)(ofGetElapsedTimef()*1000)/(int)((period)*1000))%8;
        
        glEnable(GL_BLEND);
        glBlendFunc(dfact[sid], dfact[did]);
        printf("SRC %d    DST %d\n", sid, did);
        
    } else {
        glEnable(GL_BLEND);
        glBlendFunc(dfact[defaultSid], dfact[defaultDid]);
        
    }
    
    
    
}