更正错误代码以跟踪球体

Question

我有这个小代码

GLUquadricObj *q = gluNewQuadric()
....
.....
glTranslatef(s->c.x, s->c.y, s->c.z);
gluSphere(q, s->r, SPHERE_DIVS, SPHERE_DIVS);

我想用我制作的函数替换这个glusphere。它将3D中心，镭和跟踪球体作为参数

int gp21_gluSphere(GLfloat x, GLfloat y, GLfloat z, GLdouble radius);

但我的问题是当我更换功能

gluSphere(q, s->r, SPHERE_DIVS, SPHERE_DIVS);

带

gp21_gluSphere (q.x, q.y, q.z, s->r);

我收到这些错误

error C2228: left of '.x' must have class/struct/union type
error C2228: left of '.y' must have class/struct/union type
error C2228: left of '.z' must have class/struct/union type

我该怎么办？

Answer 1

您已将q声明为指针，然后尝试访问其结构/对象之类的成员。

尝试改为：

gp21_gluSphere (q->x, q->y, q->z, s->r);