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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 "client/client.h"
#include "math/mathlib.h"
using math::degrees360f;
using math::degrees180f;
using namespace render;
namespace client
{
namespace camera
{
// public variables
// camera target
math::Vector3f target;
// 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::Track
float pitch_track;
// default pitch in mode::Overview
float pitch_overview;
// default offset increment
float offset_inc;
void init()
{
pitch_overview = -60.0f;
pitch_track = -15.0f;
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 draw(float elapsed)
{
if (mode == Track) {
yaw_target = game.ship.yaw();
}
// 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);
switch (mode) {
case Free:
gl::translate(1.0f+distance, -distance/2, 0.0f);
gl::rotate(-pitch_current, 0, 0, 1.0f);
gl::rotate(-yaw_current, 0, 1.0f, 0);
break;
case Track:
gl::translate(1.0f+distance, -distance , 0.0f);
gl::rotate(-pitch_current, 0, 0, 1.0f);
gl::rotate(-yaw_current, 0, 1.0f, 0);
break;
case Overview:
gl::translate(-distance/2, -distance, 0.0f);
gl::rotate(-pitch_current, 0, 0, 1.0f);
gl::rotate(-yaw_current, 0, 1.0f, 0);
break;
default:
break;
}
}
void rotate_right()
{
if (mode == Free || mode == Overview) {
yaw_target = degrees360f( yaw_target + offset_inc);
}
}
void rotate_left()
{
if (mode == Free || mode == Overview) {
yaw_target = degrees360f( yaw_target - offset_inc);
}
}
void rotate_up()
{
if (mode == Free) {
pitch_target = pitch_target - offset_inc;
if (pitch_target < -90.0f) pitch_target = -90.0f;
}
}
void rotate_down()
{
if (mode == Free) {
pitch_target = pitch_target + offset_inc;
if (pitch_target > 90.0f) pitch_target = 90.0f;
}
}
void nextmode() {
switch(mode) {
case Overview:
// switch camera to Track mode
mode = Track;
yaw_target = game.ship.yaw();
yaw_current = yaw_target;
pitch_target = pitch_track;
pitch_current = pitch_target;
distance = 0.4f;
break;
case Track:
// switch camera to Free mode
mode = Free;
yaw_target = game.ship.yaw();
yaw_current = yaw_target;
pitch_target = pitch_track;
pitch_current = pitch_target;
distance = 0.4f;
break;
case Free:
// switch camera to Overview mode
mode = Overview;
yaw_target = 0;
yaw_current = 0;
pitch_target = pitch_overview;
pitch_current = pitch_target;
distance = 10.0f;
default:
break;
}
}
} // namespace camera
} // namespace client
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