// 重置OpenGL窗口大小
void CglWnd::ReSizeGLScene( GLsizei width, GLsizei height )
{
if (height==0) // 防止被零除
{
height=1; // 将Height设为1
}
float mat_p[16];
float mat_t[16];
float mvp[16];
float aspect = (float)width/height;
glViewport(0,0,width,height); // 重置当前的视口
matIdentity(mvp);
matIdentity(mat_p);
matIdentity(mat_t);
viewHeight = 720/2;
viewWidth = viewHeight*aspect;
// 设置视口的大小
matPerspective((float*)mat_p, 90, aspect, 200.0f, 500.0f);
//设置镜头
matLookAt((float*)mat_t, 0,0,viewHeight, 0,0,0, 0,1,0);
matMult((float*)mvp, (float*)mat_p, (float*)mat_t);
//z=0 平面的投影大小
// set the transformation
glUniformMatrix4fv(viewprojLoc, 1, GL_FALSE, (float*)mvp);
resetMainTexVertex();
}
//!Estimate transform from a set of points
void AffineTransform::estimateFromPoints(const CvMat * points1, const CvMat * points2)
{
cv::Mat matPerspective(3, 3, CV_64FC1);
//cvFindHomography(points1, points2, &matPerspective);
cv::findHomography(matFromOldMat(points1), matFromOldMat(points2), matPerspective);
//Todo: adapt cvGetAffineTransform--it's in Warp.cpp
matPerspective *= 1. / matPerspective.at<double>(2, 2);
for(int x=0; x < ROWS; x++)
for(int y=0; y < COLS; y++)
{
cvmSet(*this, x, y, matPerspective.at<double>(x, y));
}
}
