为什么我的c++对象一创建就被删除了
Why does my c++ object gets deleted as soon as i create it?
我创建了一个类,可以在屏幕上呈现多个对象,我称之为"实体",这是3个构造函数的代码:
Entity::Entity()
{
x = y = z = 0;
std::cout<<"INIT MODEL"<<std::endl;
model = Model();
model.loadModel2("huis_0.txt");
}
Entity::Entity(float xVal,float yVal,float zVal,std::string source)
{
std::cout<<"INIT MODEL2"<<std::endl;
x = xVal;
y = yVal;
z = zVal;
model = Model();
model.loadModel2(source);
}
Entity::Entity(std::string source)
{
x = y = z = 0;
std::cout<<"INIT MODEL3"<<std::endl;
model = Model();
model.loadModel2(source);
}
解构者简单地打印出"删除实体"。然后,我使用第二种方法在主文件中加载一个实体。Model是另一个简单地从文件中加载顶点和索引的类。在运行过程中,这是我得到的输出:
INIT2
++loading model+++
++done loading model++
deleting entity
//other prints
deleting entity
然后在我关上窗户之后。我得到以下错误:"调试失败:表达式:_BLOCK_TYPE_IS_VALID(pHead->nBlockUse)"我想我得到这个错误是因为我删除了两次对象。我该如何防止这种情况发生?这也是我唯一拥有的实体,所以不可能是它。
编辑:Entity对象是在任何方法之外创建的,在我的主文件的顶部,因为我想使用Entity的"render()"方法。
第二版:这是所有使用剑的功能,请原谅我太乱了,我正在尝试我学到的openGL代码:
Entity sword = Entity(0,0,0,"pirate_sword.txt");
void Initialize(int argc, char* argv[])
{
InitWindow(argc, argv);
fprintf(stdout,"INFO: OpenGL Version: %sn",glGetString(GL_VERSION));
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
//model.loadModel2("huis_0.txt");
model.loadModel2("test_zwaard_0.txt");
glGenVertexArrays(1,&vao);
glBindVertexArray(vao);
ShaderLoader loader;
std::string test = loader.loadStringFromFile("vertex_shader.txt");
std::string frag = loader.loadStringFromFile("fragment_shader.txt");
program = loader.loadProgram(GL_VERTEX_SHADER,test,GL_FRAGMENT_SHADER,frag);
glUseProgram(program);
/*LIGHTING*/
ambient_loc = glGetUniformLocation(program,"ambient");
lightColor_loc = glGetUniformLocation(program,"lightColor");
lightDirection_loc = glGetUniformLocation(program,"lightDirection");
halfVector_loc = glGetUniformLocation(program,"halfVector");
shiny_loc = glGetUniformLocation(program,"shiny");
strength_loc = glGetUniformLocation(program,"strength");
GLfloat ambient[3] = {
0.4,0.4,0.4
};
glUniform3f(ambient_loc,ambient[0],ambient[1],ambient[2]);
GLfloat lightColor[3] = {
0.4,0.4,0.4
};
glUniform3f(lightColor_loc,lightColor[0],lightColor[1],lightColor[2]);
GLfloat lightDirection[3] = {
1.0,0.2,0.4
};
glUniform3f(lightDirection_loc,lightDirection[0],lightDirection[1],lightDirection[2]);
GLfloat halfVector[3] = {
1.0,0.2,0.4
};
glUniform3f(halfVector_loc,halfVector[0],halfVector[1],halfVector[2]);
float shiny = 0.2f;
glUniform1f(shiny_loc,shiny);
float strength = 0.7f;
glUniform1f(strength_loc,strength);
/*END OF LIGHTING*/
/*TRANSFORM*/
persp_loc = glGetUniformLocation(program,"persp");
model_loc = glGetUniformLocation(program,"model");
camera_loc = glGetUniformLocation(program,"camera");
glm::mat4 transform_model = glm::translate(glm::mat4(1.0f), glm::vec3(1.0f));
glm::rotate(transform_model,20.0f,glm::vec3(x,y,z));
glUniformMatrix4fv(model_loc,16,false,&transform_model[0][0]);
glm::mat4 transform_camera = (glm::lookAt(glm::vec3(3,5,-5),glm::vec3(0,0,0),glm::vec3(0,1,0)));
glUniformMatrix4fv(camera_loc,16,false,&transform_camera[0][0]);
glm::mat4 transform_persp = glm::perspective(45.0f,float(4/3),(float)0.5,(float)100);
//Matrix4 m;
//m.translateMatrix(0.2f,0.0f,0.0f);
float frustumScale = 1.0f,zNear = 0.1f,zFar = 100.0f;
GLfloat persp[16];
memset(persp,0.0f,sizeof(persp));
persp[0] = frustumScale;
persp[5] = frustumScale;
persp[10] = (zFar + zNear) / (zNear - zFar);
persp[14] = (2 * zFar * zNear) / (zNear - zFar);
persp[11] = -1.0f;
glUniformMatrix4fv(persp_loc,16,false,&transform_persp[0][0]);
glUseProgram(0);
glGenBuffers(1,&vbo);
glBindBuffer(GL_ARRAY_BUFFER,vbo);
GLfloat model_test[834]; //834
memset(model_test,0.0f,sizeof(model_test));
for(unsigned int i=0;i<834;i++) model_test[i] = model.getIndex(i);
glBufferData(GL_ARRAY_BUFFER,sizeof(model_test),&model_test,GL_STATIC_DRAW);
glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,0,BUFFER_OFFSET(0));
glEnableVertexAttribArray(0);
GLuint ibo;
glGenBuffers(1,&ibo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,ibo);
GLshort indices[1656];//1656
memset(indices,0,sizeof(indices));
for(int i=0;i<1656;i++) indices[i] = model.getVertexIndex(i);
glBufferData(GL_ELEMENT_ARRAY_BUFFER,sizeof(indices),&indices,GL_STATIC_DRAW);
getGLerrors("init");
glEnable(GL_DEPTH_TEST);
getGLerrors("depth");
sword.init();
sword.move(0.3f,0.0f,0.0f);
getGLerrors("sword init");
}
void RenderFunction(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glUseProgram(program);
glm::mat4 transform_model = glm::mat4(0.5f);
glm::rotate(transform_model,20.0f,glm::vec3(x,y,z));
glUniformMatrix4fv(model_loc,16,false,&transform_model[0][0]);
//glDrawArrays(GL_TRIANGLES,0,model.getSize()/3);
glBindVertexArray(vao);
if(rasterize)glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
else glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
glDrawElements(GL_TRIANGLES,model.getIndexSize(),GL_UNSIGNED_SHORT,0);
glUniformMatrix4fv(model_loc,16,false,&sword.getTransform()[0][0]);
sword.render();
getGLerrors("draw");
glutSwapBuffers();
glutPostRedisplay();
}
我确定您是如何创建Entity
的,但这是创建一个临时Model
,复制到model
中,然后销毁临时:
model = Model();
我打赌你在Entity
上也做了类似的事情。
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