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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 "math/mathlib.h"
#include "math/matrix4f.h"
#include "core/core.h"
#include "client/client.h"
#include "client/camera.h"
#include "render/render.h"
#include "sys/sys.h"
using math::degrees360f;
using math::degrees180f;
using namespace render;
namespace client
{
namespace camera
{
// gameworld coordinates of the camera target
math::Vector3f target;
math::Vector3f eye;
math::Axis axis;
// current camera mode
Mode mode;
// private variables
// current and target yaw angle in XZ plane, positive is looking left
float yaw_current;
float yaw_target;
// movement direction in free mode
float target_direction;
// current and target pitch angle in XY, positive is looking up
float pitch_current;
float pitch_target;
// movement direction in free mode
float target_pitch;
float distance;
// default pitch in mode::Track
const float pitch_track = -15.0f;
const float pitch_overview = -75.0f;
void set_mode(Mode newmode);
void init()
{
yaw_current = 0;
yaw_target = 0;
pitch_current = pitch_track * 2;
pitch_target = pitch_track;
target_pitch = 0.0f;
target_direction = 0.0f;
distance = 0.4f;
set_mode(Track);
}
void shutdown()
{
}
void set_mode(Mode newmode) {
yaw_target = 0;
yaw_current = yaw_target;
pitch_target = pitch_track;
pitch_current = pitch_target;
target_direction = 0.0f;
target_pitch = 0.0f;
distance = 0.4f;
switch(newmode) {
case Track:
// switch camera to Track mode
mode = Track;
break;
case Free:
// switch camera to Free mode
mode = Free;
pitch_target = 2.0 * pitch_track;
pitch_current = pitch_target;
break;
case Cockpit:
mode = Cockpit;
break;
case Overview:
// switch camera to Overview mode
mode = Overview;
default:
break;
}
}
void next_mode()
{
if (!core::localcontrol()) {
set_mode(Overview);
return;
}
switch(mode) {
case Free:
// switch camera to Track mode
set_mode(Track);
con_print << "camera mode: track" << std::endl;
break;
case Track:
// switch camera to Cockpit mode
set_mode(Cockpit);
con_print << "camera mode: cockpit" << std::endl;
break;
case Cockpit:
// switch camera to Free mode
set_mode(Free);
con_print << "camera mode: free" << std::endl;
break;
default:
break;
}
}
void draw(float seconds)
{
math::Matrix4f matrix;
float d = 0;
if (!core::localcontrol()) {
if (mode != Overview) {
set_mode(Overview);
}
target.clear();
axis.clear();
pitch_current = pitch_overview;
axis.change_pitch(pitch_current);
distance = 20.0f;
} else {
if (mode == Overview)
set_mode(Track);
if (core::localcontrol()->state()) {
target.assign(core::localcontrol()->state()->location());
axis.assign(core::localcontrol()->state()->axis());
} else {
target.assign(core::localcontrol()->location());
axis.assign(core::localcontrol()->axis());
}
if (mode == Track) {
if (core::localcontrol()->state() && core::localcontrol()->model()) {
target -= (core::localcontrol()->model()->maxbbox().x + 0.15f) * core::localcontrol()->state()->axis().forward();
target += (core::localcontrol()->model()->maxbbox().z + 0.3f ) *
core::localcontrol()->state()->axis().up();
}
// make the camera swing while turning
target_direction = core::localcontrol()->target_direction;
target_pitch = core::localcontrol()->target_pitch;
yaw_target = - 30 * target_direction;
pitch_target = - 30 * target_pitch;
//pitch_target = pitch_track - 30 * target_pitch;
distance = 0.0f;
} else if (mode == Free) {
yaw_target = yaw_current - 90 * target_direction;
pitch_target = pitch_current - 90 * target_pitch;
if (core::localcontrol()->model()) {
distance = core::localcontrol()->model()->radius();
} else {
distance = 1.0f;
}
} else if (mode == Cockpit) {
if (core::localcontrol()->state() && core::localcontrol()->model())
target += (core::localcontrol()->model()->maxbbox().x+0.05) *
core::localcontrol()->state()->axis().forward();
distance = 0.0f;
}
if (mode != Cockpit) {
// adjust direction
d = degrees180f(yaw_current - yaw_target);
yaw_current = degrees360f( yaw_current - d * seconds);
axis.change_direction(yaw_current);
// adjust pitch target
d = degrees180f(pitch_current - pitch_target);
pitch_current = degrees360f(pitch_current - d *seconds);
axis.change_pitch(pitch_current);
}
}
// map world coordinates to opengl coordinates
gl::rotate(90.0f, 0, 1.0, 0);
gl::rotate(-90.0f, 1.0f , 0, 0);
// assign transformation matrix
matrix.assign(axis);
// apply the transpose of the axis transformation (the axis is orhtonormal)
gl::multmatrix(matrix.transpose());
// match the camera with the current target
gl::translate(-1.0f * target);
// apply camera offset
gl::translate((1.0 + distance) * axis.forward());
// calculate eye position
eye = target - ((1.0f+distance) * axis.forward());
eye.assign(target);
}
void set_direction(float direction)
{
target_direction = direction;
math::clamp(target_direction, -1.0f, 1.0f);
}
void set_pitch(float pitch)
{
target_pitch = pitch;
math::clamp(target_pitch, -1.0f, 1.0f);
}
void reset()
{
set_mode(mode);
}
} // namespace camera
} // namespace client
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