帮助 3D 相机课程

Question

我正在尝试添加相机在 Y 轴上上下移动的功能，但目前尚不支持此功能。我尝试在按下 W 和/或 S 时添加 Y 值，但它无法正常工作。我需要什么样的公式？我知道这与音高和添加到 Y 轴有关。

void WALKING_CAMERA::Update(double time)
{
    //calculate the distance to move, based on time passed
    static double lastTime=time;
    double timePassed=time-lastTime;
    lastTime=time;

    float distance=speed*(float)timePassed/1000;

    //Get the mouse position
    POINT mPos;
    GetCursorPos(&mPos);

    angleYaw+=((float)mPos.x-320.0f)*speed/20;
    anglePitch+=((float)mPos.y-240.0f)*speed/20;

    //make sure angleY is not too great
    if(anglePitch>85.0f)
        anglePitch=85.0f;

    if(anglePitch<-85.0f)
        anglePitch=-85.0f;

    //set the mouse back to the centre of the screen
    SetCursorPos(320,240);

    //move forward/back or strafe
    if(window.isKeyPressed(VK_UP) || window.isKeyPressed('W'))
    {
        position.x += (float)sin(angleYaw*M_PI/180)*distance*25;
        position.z -= (float)cos(angleYaw*M_PI/180)*distance*25;
    }

    if(window.isKeyPressed(VK_DOWN) || window.isKeyPressed('S'))
    {
        position.x -= (float)sin(angleYaw*M_PI/180)*distance*25;
        position.z += (float)cos(angleYaw*M_PI/180)*distance*25;
    }

    if(window.isKeyPressed(VK_RIGHT) || window.isKeyPressed('D'))
    {
        position.x += (float)cos(angleYaw*M_PI/180)*distance*25;
        position.z += (float)sin(angleYaw*M_PI/180)*distance*25;
    }

    if(window.isKeyPressed(VK_LEFT) || window.isKeyPressed('A'))
    {
        position.x -= (float)cos(angleYaw*M_PI/180)*distance*25;
        position.z -= (float)sin(angleYaw*M_PI/180)*distance*25;
    }
}

谢谢！

Answer 1

对于向前移动，这种效果应该起作用：

position.y += (float)sin(anglePitch * M_PI / 180) * distance * 25;

您可能必须反转符号，因为我不确定您的应用程序是否使用正 Y 值或负 Y 值进行向上移动。