void GetUserInput(void)
{
g_fFrame_Time = g_Timer.Stop();
g_Timer.Restart();
GutReadKeyboard();
g_Control.Update(g_fFrame_Time, CGutUserControl::CONTROLLER_ROTATEOBJECT);
}
void GetUserInput(void)
{
// 讀取滑鼠
GutMouseInfo mouse;
if ( GutReadMouse(&mouse) )
{
// 取得畫完前一個畫面到現在所經歷的時間
g_fFrame_Time = g_Timer.Stop();
g_Timer.Restart();
float moving_speed = 2.0f * g_fFrame_Time;
float rotation_speed = 1.0 * g_fFrame_Time;
// 如果按下滑鼠左鍵，就旋轉鏡頭
if ( mouse.button[0] )
{
Matrix4x4 rotate_matrix;
rotate_matrix.RotateY_Replace(mouse.x * rotation_speed);
rotate_matrix.RotateX(mouse.y * rotation_speed);
g_world_matrix = g_world_matrix * rotate_matrix;
}
}
}
void GetUserInput(void)
{
// `讀取滑鼠`
GutMouseInfo mouse;
GutReadMouse(&mouse);
// `讀取鍵盤`
char keyboard_state[256];
GutReadKeyboard(keyboard_state);
// `取得畫完前一個畫面到現在所經歷的時間`
float time_diff = g_Timer.Stop();
g_Timer.Restart();
float moving_speed = 2.0f * time_diff;
float rotation_speed = 1.0 * time_diff;
// `極座標系統`
static float theta = -MATH_PI * 0.5f;
static float phi = 0.0f;
// `如果按下滑鼠左鍵, 就旋轉鏡頭.`
if ( mouse.button[0] )
{
theta += mouse.x * rotation_speed;
phi -= mouse.y * rotation_speed;
}
float sin_phi, cos_phi;
float sin_theta, cos_theta;
FastMath::SinCos(phi, sin_phi, cos_phi);
FastMath::SinCos(theta, sin_theta, cos_theta);
// `計算鏡頭的面向`
Vector4 camera_facing;
camera_facing[0] = cos_phi * cos_theta;
camera_facing[1] = sin_phi;
camera_facing[2] = cos_phi * sin_theta;
// `計算鏡頭正上方的軸向`
Vector4 camera_up;
FastMath::SinCos(phi + MATH_PI*0.5f, sin_phi, cos_phi);
camera_up[0] = cos_phi * cos_theta;
camera_up[1] = sin_phi;
camera_up[2] = cos_phi * sin_theta;
// `取得鏡面右方的方向`
Vector4 camera_right = Vector3CrossProduct(camera_facing, camera_up);
// `按下W或方向鍵向上`
if ( keyboard_state[GUTKEY_W] || keyboard_state[GUTKEY_UP] )
{
g_eye += camera_facing * moving_speed;
}
// `按下S或方向鍵向下`
if ( keyboard_state[GUTKEY_S] || keyboard_state[GUTKEY_DOWN] )
{
g_eye -= camera_facing * moving_speed;
}
// `按下A或方向鍵向左`
if ( keyboard_state[GUTKEY_A] || keyboard_state[GUTKEY_LEFT] )
{
g_eye -= camera_right * moving_speed;
}
// `按下D或方向鍵向右`
if ( keyboard_state[GUTKEY_D] || keyboard_state[GUTKEY_RIGHT] )
{
g_eye += camera_right * moving_speed;
}
// `計算出鏡頭對準的點, 產生鏡頭轉換矩陣時會用到.`
g_lookat = g_eye + camera_facing;
// `因為是對2個軸轉動, 需要更新鏡頭朝上的軸.`
g_up = camera_up;
}
