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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 "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
{
// public variables
// gameworld coordinates of the camera target
math::Vector3f target;
// gameworld coordinates of the camera eye
math::Vector3f eye;
// 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;
// default pitch in mode::Overview
float pitch_overview;
// current x offset
float x_offset;
// current z offset
float z_offset;
// 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 init()
{
rotate_offset_inc = 5.0f;
yaw_current = 0;
yaw_target = 0;
pitch_current = pitch_track * 2;
pitch_target = pitch_track;
distance = 0.4f;
mode = Track;
}
void shutdown()
{
}
void set_mode(Mode newmode) {
switch(newmode) {
case Track:
// switch camera to Track mode
mode = Track;
yaw_target = core::localcontrol()->direction();
yaw_current = yaw_target;
pitch_target = pitch_track;
pitch_current = pitch_target;
distance = 0.4f;
break;
case Free:
// switch camera to Free mode
mode = Free;
yaw_target = core::localcontrol()->direction();
yaw_current = yaw_target;
pitch_target = pitch_track;
pitch_current = pitch_target;
distance = 0.4f;
break;
case Overview:
// switch camera to Overview mode
mode = Overview;
x_offset = 0;
z_offset = 0;
distance = 20.0f;
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 elapsed)
{
if (!core::localcontrol()) {
// switch the camera to Overview of the player is not controling anything
if (mode != Overview) {
set_mode(Overview);
camera::target = math::Vector3f(0,0,0);
}
} else {
if (mode == Overview)
set_mode(Track);
camera::target = core::localcontrol()->location();
}
if (mode == Track) {
yaw_target = core::localcontrol()->direction();
}
if ((mode == Free) || (mode == Track)) {
// adjust yaw
float d = degrees180f(yaw_current - yaw_target);
yaw_current = degrees360f( yaw_current - d * elapsed) ;
// adjust pitch target
d = degrees180f(pitch_current - pitch_target);
pitch_current = degrees360f( pitch_current - d *elapsed);
}
// map world coordinates to opengl coordinates
gl::rotate(90.0f, 0, 1.0, 0);
gl::rotate(-90.0f, 1.0f , 0, 0);
// map camera coordinates to opengl coordinates
switch (mode) {
case Free:
case Track:
if (core::localcontrol()->model())
distance = core::localcontrol()->model()->radius();
else
distance = 0.5f;
// draw the camera transformation
gl::translate(0.0f, 0.0f, -3*distance/4);
gl::translate(1.2+distance, 0.0f, 0.0f);
gl::rotate(-pitch_current, 0.0f, 1.0f, 0.0f);
gl::rotate(-yaw_current, 0.0f, 0.0f, 1.0f);
gl::translate(-1*target);
break;
case Overview:
eye = target;
eye.z = eye.z + distance-1;
gl::rotate(-75.0f, 0.0f, 1.0f, 0.0f);
gl::translate(0.0f, 0.0f, -distance);
//gl::translate(x_offset, 0.0f, z_offset);
gl::translate(-1*target);
break;
default:
break;
}
}
void key_right()
{
if (mode == Free) {
yaw_target = degrees360f( yaw_target + rotate_offset_inc);
} else if (mode == Overview) {
z_offset += translate_offset_inc;
}
}
void key_left()
{
if (mode == Free) {
yaw_target = degrees360f( yaw_target - rotate_offset_inc);
} else if (mode == Overview) {
z_offset -= translate_offset_inc;
}
}
void key_up()
{
if (mode == Free) {
pitch_target = pitch_target + rotate_offset_inc;
if (pitch_target > 90.0f) pitch_target = 90.0f;
} else if (mode == Overview) {
x_offset += translate_offset_inc;
}
}
void key_down()
{
if (mode == Free) {
pitch_target = pitch_target - rotate_offset_inc;
if (pitch_target < -90.0f) pitch_target = -90.0f;
} else if (mode == Overview) {
x_offset -= translate_offset_inc;
}
}
} // namespace camera
} // namespace client
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