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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"
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;
// target yaw, angle in XZ plane, positive is looking left
float yaw_target;
// target pitch, angle in XZ plane, positive is looking left
float pitch_target;
// distance from the camera to the target
float distance;
// current camera mode
Mode mode;
// private variables
// current yaw, angle in XZ plane, positive is looking left
float yaw_current;
// current pitch, angle in XY, positive is looking up
float pitch_current;
// current direction rotation speed
float current_direction_speed;
// current pitcj rotation speed
float current_pitch_speed;
// default pitch in mode::Overview
float pitch_overview;
// default pitch in mode::Track
const float pitch_track = -15.0f;
// default rotate offset increase/decrease
float rotate_offset_inc;
// default translate offset increase/decrease
const float translate_offset_inc = 0.1;
void set_mode(Mode newmode);
void init()
{
rotate_offset_inc = 5.0f;
yaw_current = 0;
yaw_target = 0;
pitch_current = pitch_track * 2;
pitch_target = pitch_track;
distance = 0.4f;
set_mode(Track);
}
void shutdown()
{
}
void set_mode(Mode newmode) {
current_direction_speed = 0;
current_pitch_speed = 0;
yaw_target = 0;
yaw_current = yaw_target;
pitch_target = pitch_track;
pitch_current = pitch_target;
distance = 0.4f;
switch(newmode) {
case Track:
// switch camera to Track mode
mode = Track;
break;
case Free:
// switch camera to Free mode
mode = Free;
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);
break;
case Track:
// switch camera to Free mode
set_mode(Free);
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 = -75.0f;
axis.change_pitch(pitch_current);
distance = 20.0f;
} else {
if (mode == Overview)
set_mode(Track);
target.assign(core::localcontrol()->location());
if (core::localcontrol()->model())
target += core::localcontrol()->model()->maxbbox().z * core::localcontrol()->axis().up();
if (mode == Track) {
// make the camera swing while turning
yaw_target = -25.0f * core::localcontrol()->target_direction;
pitch_target = pitch_track - 25 * core::localcontrol()->target_pitch;
/*
d = -math::dotproduct(axis.forward(), core::localcontrol()->axis().forward()) + 1;
axis.change_direction(360.0f * d * seconds);
//d = -math::dotproduct(axis.left(), core::localcontrol()->axis().left()) + 1;
// axis.change_pitch(360.0f * d * seconds);
*/
}
axis.assign(core::localcontrol()->axis());
// 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);
if (core::localcontrol()->model())
distance = 1+core::localcontrol()->model()->radius();
else
distance = 1.5f;
}
// 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((1.0f+distance) * axis.forward());
// calculate eye position
eye = target - ((1.0f+distance) * axis.forward());
}
void key_right()
{
if (mode == Free) {
yaw_target = degrees360f( yaw_target + rotate_offset_inc);
}
}
void key_left()
{
if (mode == Free) {
yaw_target = degrees360f( yaw_target - rotate_offset_inc);
}
}
void key_down()
{
if (mode == Free) {
pitch_target = pitch_target + rotate_offset_inc;
if (pitch_target > 90.0f) pitch_target = 90.0f;
}
}
void key_up()
{
if (mode == Free) {
pitch_target = pitch_target - rotate_offset_inc;
if (pitch_target < -90.0f) pitch_target = -90.0f;
}
}
void reset()
{
set_mode(mode);
}
} // namespace camera
} // namespace client
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