如何在相机类中添加胶卷

How to add roll in camera class

本文关键字：添加 相机      更新时间：2023-10-16

我正在构建一个相机类，并从在线教程中获得了构建此类的帮助。

现在我想在相机中添加胶卷，但找不到任何可以解释如何在相机中添加胶卷的阅读材料。

Camera(glm::vec3 position = glm::vec3(0.0f, 0.0f, 500.0f), glm::vec3 up = glm::vec3(0.0f, 1.0f, 0.0f), float yaw = YAW, float pitch = PITCH) : Front(glm::vec3(0.0f, 0.0f, -1.0f)), Zoom(ZOOM)
{
Position = position;
WorldUp = up;
Yaw = yaw;
Pitch = pitch;
updateCameraVectors();
}
glm::mat4 GetViewMatrix()
{
return glm::lookAt(Position, Position + Front , Up);
}
void updateCameraVectors()
{

glm::vec3 front;
front.x = cos(glm::radians(Yaw - 90)) * cos(glm::radians(Pitch));
front.y = sin(glm::radians(Pitch));
front.z = sin(glm::radians(Yaw - 90)) * cos(glm::radians(Pitch)) ;
Front = glm::normalize(front);
Right = glm::normalize(glm::cross(Front, WorldUp));
Up = glm::normalize(glm::cross(Right, Front));
}

如果有人能解释如何在本课程中添加 ROll 或指导我阅读一些阅读材料，我将不胜感激。

要滚动视图，您需要围绕视线 (Front旋转向上矢量 (Up(。

定义一个围绕Front的旋转矩阵，Roll：

glm::mat4 roll_mat = glm::rotate(glm::mat4(1.0f), glm::radians(Roll), Front);

通过矩阵变换Up向量：

Up = glm::mat3(roll_mat) * Up;
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