ios – 在视网膜显示器上移动错误的顶点

概述我正在研究改变形状的图像效果,当我触摸并移动顶点进行正常显示时,它会正确移动到顶点,但在视网膜显示中它会移动到错误的顶点.这意味着它不会在触摸位置移动顶点. //Here I'm implementing grid on texture, storing each vertex point in array. GLint width = texture2D.contentSizeInPi 我正在研究改变形状的图像效果,当我触摸并移动顶点进行正常显示时,它会正确移动到顶点,但在视网膜显示中它会移动到错误的顶点.这意味着它不会在触摸位置移动顶点.

//Here I'm implementing grID on texture,storing each vertex point in array.    Glint wIDth = texture2D.contentSizeInPixels.wIDth;Glint height = texture2D.contentSizeInPixels.height;int i,j;int k;if (mass == NulL){    mass = (MASS *) malloc(sizeof(MASS)*GRID_SIZE_X*GRID_SIZE_Y);    if (mass == NulL)    {        fprintf(stderr,"body: Can't allocate memory.\n");        exit(-1);    }}k = 0;for (i = 0; i < GRID_SIZE_X; i++)    for (j = 0; j < GRID_SIZE_Y; j++)    {        //this code implements grID on texture2D,gets vertex & sIDe vertex in array         mass[k].nail = (i == 0 || j == 0 || i == GRID_SIZE_X - 1                        || j == GRID_SIZE_Y - 1);//value is 0/1        mass[k].x[0] = i/(GRID_SIZE_X - 1.0)*wIDth;        NSLog(@"mass[%d].x[0]:: %f",k,mass[k].x[0]);        mass[k].x[1] = j/(GRID_SIZE_Y - 1.0)*height;        NSLog(@"mass[%d].x[1]:: %f",mass[k].x[1]);        mass[k].x[2] = -(CliP_FAR - CliP_NEAR)/4.0;        NSLog(@"mass[%d].x[2]:: %f",mass[k].x[2]);        mass[k].v[0] = 0.0;        mass[k].v[1] = 0.0;        mass[k].v[2] = 0.0;        mass[k].t[0] = i/(GRID_SIZE_X - 1.0);        mass[k].t[1] = j/(GRID_SIZE_Y - 1.0);        k++;    }}//Here I am returning index position of stored vertex in array near by touch point.- (int)body_grab:(int)x:(int)y {float dx[2];float d;float min_d;float min_i;int i;for (i = 0; i < GRID_SIZE_X*GRID_SIZE_Y; i++){    dx[0] = mass[i].x[0] - x;    dx[1] = mass[i].x[1] - y;    d = sqrt(dx[0]*dx[0] + dx[1]*dx[1]);    if (i == 0 || d < min_d)    {        min_i = i;        min_d = d;    }}return min_i;}//Here I am getting other 3 vertex of cell where touch point exists and moving these vertex in a touch direction.- (voID)body_dynamics:(int)x:(int)y {if (mass[grab].x[0] > x && mass[grab].x[1] > y) {    grab2 = grab - GRID_SIZE_X;    grab3 = grab2 - 1;    grab4 = grab  - 1;}if (mass[grab].x[0] > x && mass[grab].x[1] < y) {    grab2 = grab - GRID_SIZE_X;    grab3 = grab2 + 1;    grab4 = grab  + 1;}if (mass[grab].x[0] < x && mass[grab].x[1] < y) {    grab2 = grab + GRID_SIZE_X;    grab3 = grab2 + 1;    grab4 = grab  + 1;}if (mass[grab].x[0] < x && mass[grab].x[0] > y) {    grab2 = grab + GRID_SIZE_X;    grab3 = grab2 - 1;    grab4 = grab  - 1;}if (grab != -1 && !mass[grab].nail &&!isFirsttouch){    mass[grab].x[0]  =  mass[grab].x[0] + mousex1;    mass[grab].x[1]  =  mass[grab].x[1] + mousey1;    mass[grab].x[2]  = -(CliP_FAR - CliP_NEAR)/4.0;    mass[grab2].x[0] =  mass[grab2].x[0] + mousex1;    mass[grab2].x[1] =  mass[grab2].x[1] + mousey1;    mass[grab2].x[2] = -(CliP_FAR - CliP_NEAR)/4.0;    mass[grab3].x[0] =  mass[grab3].x[0] + mousex1;    mass[grab3].x[1] =  mass[grab3].x[1] + mousey1;    mass[grab3].x[2] = -(CliP_FAR - CliP_NEAR)/4.0;    mass[grab4].x[0] =  mass[grab4].x[0] + mousex1;    mass[grab4].x[1] =  mass[grab4].x[1] + mousey1;    mass[grab4].x[2] = -(CliP_FAR - CliP_NEAR)/4.0;}}

解决方法 我解决了这个问题

你只需要将触摸点乘以2即可意味着你得到X pos 123和y 342你必须将这些值乘以2：123 * 2,这样你才能获得正确的顶点位置.

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