Problems with forloop and Points - c++

Question

So I'm trying too clean up my code as I was using too many Points written up. So I came up with the idea too use a forloop instead unfortunately I can't seem too get work.
I've changed my points into CVpoint arrays and made a forloop but I cant seem too get too work
Anyone know how I can make this work ? My error is Can't convert CVpoint to Int
My functions :
bool FindWhiteLine(Vec3b white)
{
bool color = false;
uchar blue = white.val[0];
uchar green = white.val[1];
uchar red = white.val[2];
if(blue == 255 && green == 255 && red == 255)
{
color = true;
}
return color;
}
// extends the line until whiteline is found
CvPoint DrawingLines(Mat img , CvPoint point,bool right)
{
int cols = img.cols;
Vec3b drawingLine = img.at<Vec3b>(point); //defines the color at current positions
while(point.x != cols){
if(right == true)
{
point.x = point.x +1; //increases the line too the right
drawingLine = img.at<cv::Vec3b>(point);
if(FindWhiteLine(drawingLine)){ // quites incase white line is found
break;
}
}
else if(right == false)
{
point.x = point.x -1; //Decrease the line too the left
drawingLine = img.at<cv::Vec3b>(point);
if(FindWhiteLine(drawingLine)){ // quites incase white line is found
break;
}
}
}
return point;
}
My main :
void LaneDetector::processImage() {
//http://docs.opencv.org/doc/user_guide/ug_mat.html Handeling images
Mat matImg(m_image);
Mat gray; // for converting to gray
cvtColor(matImg, gray, CV_BGR2GRAY); //Let's make the image gray
Mat canny; //Canny for detecting edges ,http://docs.opencv.org/doc/tutorials/imgproc/imgtrans/canny_detector/canny_detector.html
Canny(gray, canny, 50, 170, 3); //inputing Canny limits
cvtColor(canny, matImg, CV_GRAY2BGR); //Converts back from gray
// get matrix size http://docs.opencv.org/modules/core/doc/basic_structures.html
int rows = matImg.rows;
int cols = matImg.cols;
//Points
Point centerPoint; // Old way
Point centerPointEnd;
CvPoint startPos[4] , endXRight[4] , endxLeft[4]; // new way I tried
for (int i = 0; i< 4; i ++) {
startPos[i].x = cols/2;
endXRight[i].x = DrawingLines(matImg,endXRight[i],true); // error here
endxLeft[i].x = DrawingLines(matImg,endxLeft[i],false);
}
if (m_debug) {
line(matImg, centerPoint,centerPointEnd,cvScalar(0, 0, 255),2, 8);
for (i = 0; i< 4; i ++) {
line(matImg, startPos[i],endXRight[i],cvScalar(0, 0, 255),2, 8);
line(matImg, startPos[i],endXLeft[i],cvScalar(0, 0, 255),2, 8);
}
Error code :
/home/nicho/2015-mini-smart-vehicles/project-template/sources/OpenDaVINCI-msv/apps/lanedetector/src/LaneDetector.cpp:176:25: error: cannot convert ‘CvPoint’ to ‘int’ in assignment
endXRight[i].x = DrawingLines(matImg,endXRight[i],true);
/home/nicho/2015-mini-smart-vehicles/project-template/sources/OpenDaVINCI-msv/apps/lanedetector/src/LaneDetector.cpp:177:24: error: cannot convert ‘CvPoint’ to ‘int’ in assignment
endxLeft[i].x = DrawingLines(matImg,endxLeft[i],false);

Answer 1

The error couldn't be much clearer. The function returns a value of type CvPoint, and you try to assign it to a variable of type int. That can't be done because you can't convert CvPoint to int.
It looks like you want to assign to the point itself, not one of its co-ordinates:
endXRight[i] = DrawingLines(matImg,endXRight[i],true);
^ remove .x