-2
我有一个关于查找2D矢量大小的问题。我的一个简单问题是,我有一个存储三个“形状”的矢量,每个形状有一个随机数的存储点(存储为笛卡尔坐标{x,y,z}),每个存储点都有一个随机颜色(存储为RGB)I想要找出每个形状有多少个生命值。如果我做的:查找2D矢量的大小
VectorOfShapes.size()
我得到的答案
3
这是一个类似的问题 here问过。但它没有帮助我。他们的解决方案是
VectorOfShapes[1].size()
我试过了,我得到了以下错误“error C2228: left of '.size' must have class/struct/union ”。这是很好的回答(按照链接)。它仍然没有帮助我(或我是愚蠢的)... 任何想法?
// ----------补充信息
class World {
public:
vector<Flux*> VectorOfShapes;
void
containers(int obnum, Ray reflect, RGBColor Ll);
void
build(void);
void
add_vectorshape(Flux* vectorshape_ptr)
private:
void
delete_VectorOfShapes
}
inline void
World::add_vectorshape(Flux* vectorshape_ptr){
VectorOfShapes.push_back(vectorshape_ptr);
}
void
World::containers(int obnum, Ray reflect, RGBColor Ll)
{
vectorOfShapes[obnum]->push(reflect);
VectorOfShapes[obnum]->push(Ll);
int sizers = VectorOfShapes[0].size(); //this is where the code is giving me errors
}
void
World::build(void) {
Flux* vectorshape_ptr1 = new Flux;
add_vectorshape(vectorshape_ptr1);
Flux* vectorshape_ptr2 = new Flux;
add_vectorshape(vectorshape_ptr2);
Flux* vectorshape_ptr3 = new Flux;
add_vectorshape(vectorshape_ptr3);
}
void
World::delete_VectorOfShapes(void) {
int num_VectorOfShapes = VectorOfShapes.size();
for (int j = 0; j < num_VectorOfShapes; j++) {
delete VectorOfShapes[j];
VectorOfShapes[j] = NULL;
}
VectorOfShapes.erase (VectorOfShapes.begin(), VectorOfShapes.end());
}
class Flux{
public:
std::vector<Ray> rays;
std::vector<RGBColor> L;
void push(Ray ray);
void push(RGBColor Ls) ;
};
inline void
Flux::push(Ray ray) {
rays.push_back(ray);
}
inline void
Flux::push(RGBColor Ls){
L.push_back(Ls);
}
你可以发布'VectorOfShapes'的声明吗? – hmjd 2012-04-11 14:48:43
在'VectorOfShapes [1] .size'中,'.size'可能是一个方法,而不是一个变量,因此您需要将它称为'VectorOfShapes [1] .size()'。但很难说没有什么是VectorOfShapes。 – karlphillip 2012-04-11 14:52:56
'float HitPoints = VectorOfShapes [0] .x + VectorOfShapes [0] .y + VectorOfShapes [0] .z'? – Cyclonecode 2012-04-11 14:55:02