4

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
4

1 回答 1

6

在你的main规则中:

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

请注意,尽管您提到 Sphere.o 作为依赖项,但您没有链接它。您还需要将其包含在构建行中:

main : main.o Point.o colort.o Sphere.o Scene.o Ray.o HitRecord.o
    $(CC) $(BUILD)/main.o $(BUILD)/Point.o $(BUILD)/Sphere.o -o $(BUILD)/main

您可能还想添加其他的,基于您将它们列为依赖项的事实。

于 2013-02-10T22:32:36.660 回答