float get_tile_height(const float x, const float y)
{
float z;
int pos_x, pos_y, i, j, tmp, count;
if (!get_tile_valid(x, y))
{
return 0.0f;
}
pos_x = x;
pos_y = y;
tmp = height_map[pos_y * tile_map_size_x * 6 + pos_x];
if (tmp != 0)
{
return tmp * 0.2f - 2.2f;
}
tmp = 0;
count = 0;
for (j = pos_y - 1; j <= (pos_y + 1); ++j)
{
for (i = pos_x - 1; i <= (pos_x + 1); ++i)
{
if (get_tile_walkable(i, j))
{
tmp += height_map[j * tile_map_size_x * 6 + i];
count++;
}
}
}
z = tmp;
if (count > 1)
{
z /= count;
}
return z * 0.2f - 2.2f;
}
void update_camera()
{
const float c_delta = 0.1f;
static int last_update = 0;
int time_diff = cur_time - last_update;
static float old_camera_x = 0;
static float old_camera_y = 0;
static float old_camera_z = 0;
float adjust;
actor *me = get_our_actor();
old_rx=rx;
old_rz=rz;
new_zoom_level=old_zoom_level=zoom_level;
//printf("kludge: %f, hold: %f, rx: %f, rz %f, zoom: %f\n",camera_kludge, hold_camera,rx,rz,zoom_level);
if (fol_cam && !fol_cam_behind)
rz = hold_camera;
if (me)
camera_kludge = -me->z_rot;
/* This is a BIG hack to not polluate the code but if this feature
* is accepted and the flag is removed, all the code that
* follows will have to be changed in order to get rid of
* camera_rotation_duration and camera_tilt_duration. */
camera_rotation_duration = camera_rotation_speed != 0.0 ? time_diff : 0.0;
camera_tilt_duration = camera_tilt_speed != 0.0 ? time_diff : 0.0;
if(camera_rotation_duration > 0){
if (time_diff <= camera_rotation_duration)
rz+=camera_rotation_speed*time_diff;
else
rz+=camera_rotation_speed*camera_rotation_duration;
camera_rotation_duration-=time_diff;
adjust_view++;
}
if(camera_x_duration > 0){
if(camera_x_speed>1E-4 || camera_x_speed<-1E-4){
if (time_diff <= camera_x_duration)
camera_x-=camera_x_speed*time_diff;
else
camera_x-=camera_x_speed*camera_x_duration;
if(fabs(camera_x-old_camera_x) >= c_delta){
adjust_view++;
}
}
camera_x_duration-=time_diff;
}
if(camera_y_duration > 0){
if(camera_y_speed>1E-4 || camera_y_speed<-1E-4){
if (time_diff <= camera_y_duration)
camera_y-=camera_y_speed*time_diff;
else
camera_y-=camera_y_speed*camera_y_duration;
if(fabs(camera_y-old_camera_y) >= c_delta){
adjust_view++;
}
}
camera_y_duration-=time_diff;
}
if(camera_z_duration > 0){
if(camera_z_speed>1E-4 || camera_z_speed<-1E-4){
if (time_diff <= camera_z_duration)
camera_z-=camera_z_speed*time_diff;
else
camera_z-=camera_z_speed*camera_z_duration;
if(fabs(camera_z-old_camera_z) >= c_delta){
adjust_view++;
}
}
camera_z_duration-=time_diff;
}
if(camera_tilt_duration > 0) {
if (time_diff <= camera_tilt_duration)
rx+=camera_tilt_speed*time_diff;
else
rx+=camera_tilt_speed*camera_tilt_duration;
camera_tilt_duration-=time_diff;
adjust_view++;
}
if(camera_zoom_duration > 0) {
if (time_diff <= camera_zoom_duration)
new_zoom_level += camera_zoom_speed*(camera_zoom_dir==1?0.003f:-0.003f)*time_diff;
else
new_zoom_level += camera_zoom_speed*(camera_zoom_dir==1?0.003f:-0.003f)*camera_zoom_duration;
camera_zoom_duration-=time_diff;
adjust_view++;
}
else
camera_zoom_speed = 1;
if (camera_rotation_speed > 0.0)
{
camera_rotation_speed -= time_diff * camera_rotation_deceleration;
if (camera_rotation_speed < 0.0)
camera_rotation_speed = 0.0;
}
else if (camera_rotation_speed < 0.0)
{
camera_rotation_speed += time_diff * camera_rotation_deceleration;
if (camera_rotation_speed > 0.0)
camera_rotation_speed = 0.0;
}
if (camera_tilt_speed > 0.0)
{
camera_tilt_speed -= time_diff * camera_tilt_deceleration;
if (camera_tilt_speed < 0.0)
camera_tilt_speed = 0.0;
}
else if (camera_tilt_speed < 0.0)
{
camera_tilt_speed += time_diff * camera_tilt_deceleration;
if (camera_tilt_speed > 0.0)
camera_tilt_speed = 0.0;
}
clamp_camera();
if (ext_cam && !first_person && me &&
rx <= -min_tilt_angle && rx >= -max_tilt_angle)
{
float rot_x[9], rot_z[9], rot[9], dir[3];
float vect[3] = {0.0, 0.0, new_zoom_level*camera_distance};
int tx, ty;
float tz;
// we compute the camera position
MAT3_ROT_X(rot_x, -rx*M_PI/180.0);
MAT3_ROT_Z(rot_z, -rz*M_PI/180.0);
MAT3_MULT(rot, rot_z, rot_x);
MAT3_VECT3_MULT(dir, rot, vect);
// we take the tile where the camera is
tx = (int)((dir[0] - camera_x)*2);
ty = (int)((dir[1] - camera_y)*2);
if (get_tile_walkable(tx, ty))
{
tz = get_tile_height(tx, ty);
}
else
{
// if the tile is outside the map, we take the height at the actor position
tz = get_tile_height(me->x_tile_pos, me->y_tile_pos);
}
// here we use a shift of 0.2 to avoid to be too close to the ground
if (tz + 0.2 > dir[2] - camera_z)
{
if (ext_cam_auto_zoom) // new behaviour
{
// if the camera is under the ground, we change the zoom level
if (fabsf(dir[2]) > 1E-4)
new_zoom_level *= (tz + camera_z + 0.2) / dir[2];
else
new_zoom_level = 0.0;
if (new_zoom_level < 1.0)
{
new_zoom_level = 1.0;
camera_tilt_duration = camera_zoom_duration = 0;
camera_tilt_speed = 0.0;
if (fabsf(tz + camera_z + 0.2f) < fabsf(vect[2]) - 0.01)
rx = -90.0 + 180.0 * asinf((tz + camera_z + 0.2) / vect[2]) / M_PI;
}
else if (new_zoom_level > old_zoom_level)
{
new_zoom_level = old_zoom_level;
camera_tilt_duration = camera_zoom_duration = 0;
camera_tilt_speed = 0.0;
}
}
else // old freecam behaviour
{
new_zoom_level = old_zoom_level;
camera_tilt_duration = camera_zoom_duration = 0;
camera_tilt_speed = 0.0;
if (fabsf(tz + camera_z + 0.2f) < fabsf(vect[2]) - 0.01)
rx = -90.0 + 180.0 * asinf((tz + camera_z + 0.2) / vect[2]) / M_PI;
}
}
}
if(adjust_view){
set_all_intersect_update_needed(main_bbox_tree);
old_camera_x= camera_x;
old_camera_y= camera_y;
old_camera_z= camera_z;
}
hold_camera = rz;
if (fol_cam) {
static int fol_cam_stop = 0;
if ((SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(2)) || camera_rotation_speed != 0)
fol_cam_stop = 1;
else if (me && me->moving && fol_cam_stop)
fol_cam_stop = 0;
if (last_kludge != camera_kludge && !fol_cam_stop) {
set_all_intersect_update_needed(main_bbox_tree);
adjust = (camera_kludge-last_kludge);
//without this the camera will zip the wrong way when camera_kludge
//flips from 180 <-> -180
if (adjust >= 180) adjust -= 360.0;
else if (adjust <= -180) adjust += 360.0;
if (fabs(adjust) < fol_strn) {
last_kludge=camera_kludge;
}
else {
last_kludge += fol_strn*(
adjust*(fol_quad*fol_strn + fol_lin)+
fol_con*(adjust>0?1:-1))/
(fol_quad+fol_lin+fol_con+.000001f);//cheap no/0
}
}
if (fol_cam_behind)
{
if (!fol_cam_stop)
rz = -last_kludge;
else
last_kludge = -rz;
}
else
rz -= last_kludge;
}
//Make Character Turn with Camera
if (have_mouse && !on_the_move (get_our_actor ()))
{
adjust = rz;
//without this the character will turn the wrong way when camera_kludge
//and character are in certain positions
if (adjust >= 180) adjust -= 360.0;
else if (adjust <= -180) adjust += 360.0;
adjust+=camera_kludge;
if (adjust >= 180) adjust -= 360.0;
else if (adjust <= -180) adjust += 360.0;
if (adjust > 35){
Uint8 str[2];
str[0] = TURN_LEFT;
my_tcp_send (my_socket, str, 1);
} else if (adjust < -35){
Uint8 str[2];
str[0] = TURN_RIGHT;
my_tcp_send (my_socket, str, 1);
}
}
adjust_view = 0;
last_update = cur_time;
}