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/*
client/camera.cc
This file is part of the Osirion project and is distributed under
the terms and conditions of the GNU General Public License version 2
*/
#include "camera.h"
#include "gl/osiriongl.h"
#include "game/game.h"
#include "common/functions.h"
using namespace common;
namespace client
{
Camera::Mode Camera::mode = Camera::Track;
const float Camera::track_pitch = -15.0f; // default tracking pitch
const float Camera::offset_inc = 5.0f; // default offset increment
float Camera::yaw = 0; // current yaw, angle in XZ plane, positive is looking left
float Camera::yaw_target = 0; // target yaw
float Camera::pitch = -45.0f; // current pitch, angle in XY, positive is looking up
float Camera::pitch_target = Camera::track_pitch; // target pitch
float Camera::distance = 0.4f; // distance from the eye to the target
void Camera::draw(float elapsed)
{
if (mode == Track) {
yaw_target = game::ship.yaw;
}
// adjust yaw
float d = degreesf(yaw - yaw_target);
yaw = degreesf( yaw - d * elapsed) ;
// adjust pitch target
d = degreesf(pitch - pitch_target);
pitch = degreesf( pitch - d *elapsed);
switch (mode) {
case Free:
gl::translate(1.0f+distance, -distance, 0.0f);
gl::rotate(-pitch, 0, 0, 1.0f);
gl::rotate(-yaw, 0, 1.0f, 0);
break;
case Track:
gl::translate(1.0f+distance, -distance , 0.0f);
gl::rotate(-pitch, 0, 0, 1.0f);
gl::rotate(-yaw, 0, 1.0f, 0);
break;
default:
break;
}
}
void Camera::rotate_right()
{
if (mode == Free ) {
yaw_target = degreesf( yaw_target + offset_inc);
}
}
void Camera::rotate_left()
{
if (mode == Free ) {
yaw_target = degreesf( yaw_target - offset_inc);
}
}
void Camera::rotate_up()
{
if (mode == Free ) {
pitch_target = pitch_target - offset_inc;
if (pitch_target < -90.0f) pitch_target = -90.0f;
}
}
void Camera::rotate_down()
{
if (mode == Free ) {
pitch_target = pitch_target + offset_inc;
if (pitch_target > 90.0f) pitch_target = 90.0f;
}
}
void Camera::nextmode() {
switch(mode) {
case Free:
// switch camera to Track mode
mode = Track;
yaw_target = game::ship.yaw;
yaw = yaw_target;
pitch_target = track_pitch;
pitch = pitch_target;
break;
case Track:
// switch camera to Free mode
mode = Free;
yaw_target = game::ship.yaw;
yaw = yaw_target;
pitch_target = track_pitch;
pitch = pitch_target;
break;
default:
break;
}
}
} //namespace camera
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