glm:不是类型或命名空间吗?我的标题中有一个令人困惑的错误

Question

我在这里学习本教程（我知道从glfw 2到3有一些变化在本教程中没有定义，我已经纠正了这些方面。

然而，当我在完成应该工作的内容后尝试编译时，我遇到了一个错误，因为我的头文件没有将glm识别为命名空间，所以它假设int破坏了程序的其余部分。

我的标题如下：

#ifndef CONTROLS_HPP
#define CONTROLS_HPP
 void computeMatricesFromInputs();
 glm::mat4 getViewMatrix();
 glm::mat4 getProjectionMatrix();
#endif

我的.cpp文件是这样的：

// Include GLFW
#include <glfw3.h>
extern GLFWwindow* window;
// Include GLM
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtx/transform.hpp>
using namespace glm;
#include "Outputs/controls.hpp"
glm::mat4 ViewMatrix;
glm::mat4 ProjectionMatrix;
glm::mat4 getViewMatrix(){
return ViewMatrix;
}
glm::mat4 getProjectionMatrix(){
return ProjectionMatrix;
}

// Initial position : on +Z
glm::vec3 position = glm::vec3(0, 0, 5);
// Initial horizontal angle : toward -Z
float horizontalAngle = 3.14f;
// Initial vertical angle : none
float verticalAngle = 0.0f;
// Initial Field of View
float initialFoV = 45.0f;
float speed = 3.0f; // 3 units / second
float mouseSpeed = 0.005f;

void computeMatricesFromInputs(){
// glfwGetTime is called only once, the first time this function is called
static double lastTime = glfwGetTime();
// Compute time difference between current and last frame
double currentTime = glfwGetTime();
float deltaTime = float(currentTime - lastTime);
// Get mouse position
double xpos, ypos;
glfwGetCursorPos(window, &xpos, &ypos);
// Reset mouse position for next frame
glfwSetCursorPos(window, 1024 / 2, 768 / 2);
// Compute new orientation
horizontalAngle += mouseSpeed * float(1024 / 2 - xpos);
verticalAngle += mouseSpeed * float(768 / 2 - ypos);
// Direction : Spherical coordinates to Cartesian coordinates conversion
glm::vec3 direction(
    cos(verticalAngle) * sin(horizontalAngle),
    sin(verticalAngle),
    cos(verticalAngle) * cos(horizontalAngle)
    );
// Right vector
glm::vec3 right = glm::vec3(
    sin(horizontalAngle - 3.14f / 2.0f),
    0,
    cos(horizontalAngle - 3.14f / 2.0f)
    );
// Up vector
glm::vec3 up = glm::cross(right, direction);
// Move forward
if (glfwGetKey(window, GLFW_KEY_UP) == GLFW_PRESS){
    position += direction * deltaTime * speed;
}
// Move backward
if (glfwGetKey(window, GLFW_KEY_DOWN) == GLFW_PRESS){
    position -= direction * deltaTime * speed;
}
// Strafe right
if (glfwGetKey(window, GLFW_KEY_RIGHT) == GLFW_PRESS){
    position += right * deltaTime * speed;
}
// Strafe left
if (glfwGetKey(window, GLFW_KEY_LEFT) == GLFW_PRESS){
    position -= right * deltaTime * speed;
}
float FoV = initialFoV;
// Projection matrix : 45° Field of View, 4:3 ratio, display range : 0.1 unit <-> 100 units
ProjectionMatrix = glm::perspective(FoV, 4.0f / 3.0f, 0.1f, 100.0f);
// Camera matrix
ViewMatrix = glm::lookAt(
    position,           // Camera is here
    position + direction, // and looks here : at the same position, plus "direction"
    up                  // Head is up (set to 0,-1,0 to look upside-down)
    );
// For the next frame, the "last time" will be "now"
lastTime = currentTime;
}

我很困惑这里发生了什么，使用glm的所有其他方面都很好。

Answer 1

这个问题已经Borglider帮我回答了（谢谢！）。它也通过在标头中使用glm的include来解决。