我只看到过这种情况是由于人们在构建时没有将他们的类对象链接在一起,但我有,而且我不确定这是怎么回事。
来源:
//test.cpp
#include "Point.h"
#include "Sphere.h"
#include "Scene.h"
int main(){
Sphere s;
Scene sc;
sc.img_plane.upper_left = Point(-1, 1, -3);
sc.img_plane.upper_right = Point(1, 1, -3);
sc.img_plane.lower_left = Point(-1, -1, -3);
sc.img_plane.lower_right = Point(1, -1, -3);
sc.width = 100;
sc.height = 100;
return 0;
}
错误:
test.cpp:(.text+0x17): undefined reference to `Sphere::Sphere()'
test.cpp:(.text+0x26): undefined reference to `Scene::Scene()'
test.cpp:(.text+0x192): undefined reference to `Scene::~Scene()'
test.cpp:(.text+0x1a1): undefined reference to `Sphere::~Sphere()'
test.cpp:(.text+0x1bf): undefined reference to `Scene::~Scene()'
test.cpp:(.text+0x1d3): undefined reference to `Sphere::~Sphere()'
生成文件:
CC = g++
SRC = ./src
BUILD = ./build
main : main.o Point.o colort.o Sphere.o Scene.o Ray.o HitRecord.o
$(CC) $(BUILD)/main.o $(BUILD)/Point.o -o $(BUILD)/main
main.o : $(SRC)/test.cpp
$(CC) -c $< -o $(BUILD)/main.o
Point.o : $(SRC)/Point.cpp $(SRC)/Point.h
$(CC) -c $< -o $(BUILD)/Point.o
colort.o : $(SRC)/colort.cpp $(SRC)/colort.h
$(CC) -c $< -o $(BUILD)/colort.o
Sphere.o : $(SRC)/Sphere.cpp $(SRC)/Sphere.h $(SRC)/colort.cpp $(SRC)/Point.cpp
$(CC) -c $< -o $(BUILD)/Sphere.o
ImagePlane.o : $(SRC)/ImagePlane.cpp $(SRC)/ImagePlane.h
$(CC) -c $< -o $(BUILD)/ImagePlane.o
Scene.o : $(SRC)/Scene.cpp $(SRC)/Scene.h
$(CC) -c $< -o $(BUILD)/Scene.o
Ray.o : $(SRC)/Ray.cpp $(SRC)/Ray.h
$(CC) -c $< -o $(BUILD)/Ray.o
HitRecord.o : $(SRC)/HitRecord.cpp $(SRC)/HitRecord.h
$(CC) -c $< -o $(BUILD)/HitRecord.o
clean :
rm $(BUILD)/*
test : main
$(BUILD)/main
场景构造函数与 Sphere 相同:
球体.h:
#ifndef SPHERE_H_
#define SPHERE_H_
#include "colort.h"
#include "Point.h"
#include "Ray.h"
class Sphere {
public:
Sphere();
virtual ~Sphere();
Point center;
double radius;
color_t diffuse, specular;
double intersection(Ray r);
};
#endif /* SPHERE_H_ */
球体.cpp:
#include "Sphere.h"
#include <math.h>
Sphere::Sphere() {
}
Sphere::~Sphere() {
}
...other class functions