getPoint()

TS_Point Touch::getPoint

(

)

Definition at line 111 of file touch.cpp.

{
    float fx,fy;
    int16_t x,y;
    //Serial.println("Touch:getPoint");
    //update();
    
    //dynamic calibration is supported by monitoring the raw touch limits
    //which are used for the screen space translation calculations      
    if (xraw < _raw_minx) _raw_minx = xraw;
    if (xraw > _raw_maxx) _raw_maxx = xraw;
    if (yraw < _raw_miny) _raw_miny = yraw;
    if (yraw > _raw_maxy) _raw_maxy = yraw;
 
    //normalize the raw touch readings to percentage of full scale (0 to 1)
    fx = (xraw - _raw_minx)/(1.0 * (_raw_maxx - _raw_minx));
    fy = (yraw - _raw_miny)/(1.0 * (_raw_maxy - _raw_miny));
    //convert normalized values to screen space
    x = (int16_t)(fx * SCREEN_WIDTH); 
    y = (int16_t)(fy * SCREEN_HEIGHT);
    (x < 0)?x=0:x=x;
    (y < 0)?y=0:y=y;    
    return TS_Point(SCREEN_WIDTH-x, SCREEN_HEIGHT-y, zraw);
}

References _raw_maxx, _raw_maxy, _raw_minx, _raw_miny, xraw, yraw, and zraw.

Referenced by AppManager::update().

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