void
Camera::reset(const Vector& tuxpos)
{
translation.x = tuxpos.x - SCREEN_WIDTH/3 * 2;
translation.y = tuxpos.y - SCREEN_HEIGHT/2;
shakespeed = 0;
shaketimer.stop();
keep_in_bounds(translation);
}
void
Camera::update_scroll_autoscroll(float elapsed_time)
{
Player* player = sector->player;
if(player->is_dying())
return;
translation = autoscroll_walker->advance(elapsed_time);
keep_in_bounds(translation);
}
void
Camera::scroll_to(const Vector& goal, float scrolltime)
{
scroll_from = translation;
scroll_goal = goal;
keep_in_bounds(scroll_goal);
scroll_to_pos = 0;
scrollspeed = 1.0 / scrolltime;
mode = SCROLLTO;
}
void
Camera::update_scroll_normal(float elapsed_time)
{
const CameraConfig& config = *(this->config);
Player* player = sector->player;
// TODO: co-op mode needs a good camera
Vector player_pos(player->get_bbox().get_middle().x,
player->get_bbox().get_bottom());
static Vector last_player_pos = player_pos;
Vector player_delta = player_pos - last_player_pos;
last_player_pos = player_pos;
// check that we don't have division by zero later
if(elapsed_time < CAMERA_EPSILON)
return;
/****** Vertical Scrolling part ******/
int ymode = config.ymode;
if(player->is_dying() || sector->get_height() == 19*32) {
ymode = 0;
}
if(ymode == 1) {
cached_translation.y = player_pos.y - SCREEN_HEIGHT * config.target_y;
}
if(ymode == 2) {
// target_y is the high we target our scrolling at. This is not always the
// high of the player, but if he is jumping upwards we should use the
// position where he last touched the ground. (this probably needs
// exceptions for trampolines and similar things in the future)
float target_y;
if(player->fall_mode == Player::JUMPING)
target_y = player->last_ground_y + player->get_bbox().get_height();
else
target_y = player->get_bbox().p2.y;
target_y -= SCREEN_HEIGHT * config.target_y;
// delta_y is the distance we'd have to travel to directly reach target_y
float delta_y = cached_translation.y - target_y;
// speed is the speed the camera would need to reach target_y in this frame
float speed_y = delta_y / elapsed_time;
// limit the camera speed when jumping upwards
if(player->fall_mode != Player::FALLING
&& player->fall_mode != Player::TRAMPOLINE_JUMP) {
speed_y = clamp(speed_y, -config.max_speed_y, config.max_speed_y);
}
// scroll with calculated speed
cached_translation.y -= speed_y * elapsed_time;
}
if(ymode == 3) {
float halfsize = config.kirby_rectsize_y * 0.5f;
cached_translation.y = clamp(cached_translation.y,
player_pos.y - SCREEN_HEIGHT * (0.5f + halfsize),
player_pos.y - SCREEN_HEIGHT * (0.5f - halfsize));
}
if(ymode == 4) {
float upperend = SCREEN_HEIGHT * config.edge_x;
float lowerend = SCREEN_HEIGHT * (1 - config.edge_x);
if (player_delta.y < -CAMERA_EPSILON) {
// walking left
lookahead_pos.y -= player_delta.y * config.dynamic_speed_sm;
if(lookahead_pos.y > lowerend) {
lookahead_pos.y = lowerend;
}
} else if (player_delta.y > CAMERA_EPSILON) {
// walking right
lookahead_pos.y -= player_delta.y * config.dynamic_speed_sm;
if(lookahead_pos.y < upperend) {
lookahead_pos.y = upperend;
}
}
// adjust for level ends
if (player_pos.y < upperend) {
lookahead_pos.y = upperend;
}
if (player_pos.y > sector->get_width() - upperend) {
lookahead_pos.y = lowerend;
}
cached_translation.y = player_pos.y - lookahead_pos.y;
}
translation.y = cached_translation.y;
if(ymode != 0) {
float top_edge, bottom_edge;
if(config.clamp_y <= 0) {
top_edge = 0;
bottom_edge = SCREEN_HEIGHT;
} else {
top_edge = SCREEN_HEIGHT*config.clamp_y;
bottom_edge = SCREEN_HEIGHT*(1-config.clamp_y);
}
float peek_to = 0;
float translation_compensation = player_pos.y - translation.y;
if(player->peeking_direction_y() == ::UP) {
peek_to = bottom_edge - translation_compensation;
} else if(player->peeking_direction_y() == ::DOWN) {
peek_to = top_edge - translation_compensation;
}
float peek_move = (peek_to - peek_pos.y) * PEEK_ARRIVE_RATIO;
if(fabs(peek_move) < 1.0) {
peek_move = 0.0;
}
peek_pos.y += peek_move;
translation.y -= peek_pos.y;
if(config.clamp_y > 0) {
translation.y = clamp(translation.y,
player_pos.y - SCREEN_HEIGHT * (1-config.clamp_y),
player_pos.y - SCREEN_HEIGHT * config.clamp_y);
cached_translation.y = clamp(cached_translation.y,
player_pos.y - SCREEN_HEIGHT * (1-config.clamp_y),
player_pos.y - SCREEN_HEIGHT * config.clamp_y);
}
}
/****** Horizontal scrolling part *******/
int xmode = config.xmode;
if(player->is_dying())
xmode = 0;
if(xmode == 1) {
cached_translation.x = player_pos.x - SCREEN_WIDTH * config.target_x;
}
if(xmode == 2) {
// our camera is either in leftscrolling, rightscrolling or
// nonscrollingmode.
//
// when suddenly changing directions while scrolling into the other
// direction abort scrolling, since tux might be going left/right at a
// relatively small part of the map (like when jumping upwards)
// Find out direction in which the player moves
LookaheadMode walkDirection;
if (player_delta.x < -CAMERA_EPSILON) walkDirection = LOOKAHEAD_LEFT;
else if (player_delta.x > CAMERA_EPSILON) walkDirection = LOOKAHEAD_RIGHT;
else if (player->dir == ::LEFT) walkDirection = LOOKAHEAD_LEFT;
else walkDirection = LOOKAHEAD_RIGHT;
float LEFTEND, RIGHTEND;
if(config.sensitive_x > 0) {
LEFTEND = SCREEN_WIDTH * config.sensitive_x;
RIGHTEND = SCREEN_WIDTH * (1-config.sensitive_x);
} else {
LEFTEND = SCREEN_WIDTH;
RIGHTEND = 0;
}
if(lookahead_mode == LOOKAHEAD_NONE) {
/* if we're undecided then look if we crossed the left or right
* "sensitive" area */
if(player_pos.x < cached_translation.x + LEFTEND) {
lookahead_mode = LOOKAHEAD_LEFT;
} else if(player_pos.x > cached_translation.x + RIGHTEND) {
lookahead_mode = LOOKAHEAD_RIGHT;
}
/* at the ends of a level it's obvious which way we will go */
if(player_pos.x < SCREEN_WIDTH*0.5) {
lookahead_mode = LOOKAHEAD_RIGHT;
} else if(player_pos.x >= sector->get_width() - SCREEN_WIDTH*0.5) {
lookahead_mode = LOOKAHEAD_LEFT;
}
changetime = -1;
} else if(lookahead_mode != walkDirection) {
/* player changed direction while camera was scrolling...
* he has to do this for a certain time to add robustness against
* sudden changes */
if(changetime < 0) {
changetime = game_time;
} else if(game_time - changetime > config.dirchange_time) {
if(lookahead_mode == LOOKAHEAD_LEFT &&
player_pos.x > cached_translation.x + RIGHTEND) {
lookahead_mode = LOOKAHEAD_RIGHT;
} else if(lookahead_mode == LOOKAHEAD_RIGHT &&
player_pos.x < cached_translation.x + LEFTEND) {
lookahead_mode = LOOKAHEAD_LEFT;
} else {
lookahead_mode = LOOKAHEAD_NONE;
}
}
} else {
changetime = -1;
}
LEFTEND = SCREEN_WIDTH * config.edge_x;
RIGHTEND = SCREEN_WIDTH * (1-config.edge_x);
// calculate our scroll target depending on scroll mode
float target_x;
if(lookahead_mode == LOOKAHEAD_LEFT)
target_x = player_pos.x - RIGHTEND;
else if(lookahead_mode == LOOKAHEAD_RIGHT)
target_x = player_pos.x - LEFTEND;
else
target_x = cached_translation.x;
// that's the distance we would have to travel to reach target_x
float delta_x = cached_translation.x - target_x;
// the speed we'd need to travel to reach target_x in this frame
float speed_x = delta_x / elapsed_time;
// limit our speed
float player_speed_x = player_delta.x / elapsed_time;
float maxv = config.max_speed_x + (fabsf(player_speed_x * config.dynamic_max_speed_x));
speed_x = clamp(speed_x, -maxv, maxv);
// apply scrolling
cached_translation.x -= speed_x * elapsed_time;
}
if(xmode == 3) {
float halfsize = config.kirby_rectsize_x * 0.5f;
cached_translation.x = clamp(cached_translation.x,
player_pos.x - SCREEN_WIDTH * (0.5f + halfsize),
player_pos.x - SCREEN_WIDTH * (0.5f - halfsize));
}
if(xmode == 4) {
float LEFTEND = SCREEN_WIDTH * config.edge_x;
float RIGHTEND = SCREEN_WIDTH * (1 - config.edge_x);
if (player_delta.x < -CAMERA_EPSILON) {
// walking left
lookahead_pos.x -= player_delta.x * config.dynamic_speed_sm;
if(lookahead_pos.x > RIGHTEND) {
lookahead_pos.x = RIGHTEND;
}
} else if (player_delta.x > CAMERA_EPSILON) {
// walking right
lookahead_pos.x -= player_delta.x * config.dynamic_speed_sm;
if(lookahead_pos.x < LEFTEND) {
lookahead_pos.x = LEFTEND;
}
}
// adjust for level ends
if (player_pos.x < LEFTEND) {
lookahead_pos.x = LEFTEND;
}
if (player_pos.x > sector->get_width() - LEFTEND) {
lookahead_pos.x = RIGHTEND;
}
cached_translation.x = player_pos.x - lookahead_pos.x;
}
translation.x = cached_translation.x;
if(xmode != 0) {
float left_edge, right_edge;
if(config.clamp_x <= 0) {
left_edge = 0;
right_edge = SCREEN_WIDTH;
} else {
left_edge = SCREEN_WIDTH*config.clamp_x;
right_edge = SCREEN_WIDTH*(1-config.clamp_x);
}
float peek_to = 0;
float translation_compensation = player_pos.x - translation.x;
if(player->peeking_direction_x() == ::LEFT) {
peek_to = right_edge - translation_compensation;
} else if(player->peeking_direction_x() == ::RIGHT) {
peek_to = left_edge - translation_compensation;
}
float peek_move = (peek_to - peek_pos.x) * PEEK_ARRIVE_RATIO;
if(fabs(peek_move) < 1.0) {
peek_move = 0.0;
}
peek_pos.x += peek_move;
translation.x -= peek_pos.x;
if(config.clamp_x > 0) {
translation.x = clamp(translation.x,
player_pos.x - SCREEN_WIDTH * (1-config.clamp_x),
player_pos.x - SCREEN_WIDTH * config.clamp_x);
cached_translation.x = clamp(cached_translation.x,
player_pos.x - SCREEN_WIDTH * (1-config.clamp_x),
player_pos.x - SCREEN_WIDTH * config.clamp_x);
}
}
keep_in_bounds(translation);
keep_in_bounds(cached_translation);
}
void
Camera::update_scroll_normal(float elapsed_time)
{
assert(sector != 0);
Player* player = sector->player;
// check that we don't have division by zero later
if(elapsed_time < EPSILON)
return;
/****** Vertical Scrolling part ******/
bool do_y_scrolling = true;
if(player->is_dying() || sector->solids->get_height() == 19)
do_y_scrolling = false;
if(do_y_scrolling) {
// target_y is the high we target our scrolling at. This is not always the
// high of the player, but if he is jumping upwards we should use the
// position where he last touched the ground. (this probably needs
// exceptions for trampolines and similar things in the future)
float target_y;
if(player->fall_mode == Player::JUMPING)
target_y = player->last_ground_y + player->get_bbox().get_height();
else
target_y = player->get_bbox().p2.y;
// delta_y is the distance we'd have to travel to directly reach target_y
float delta_y = translation.y - (target_y - SCREEN_HEIGHT*2/3);
// speed is the speed the camera would need to reach target_y in this frame
float speed_y = delta_y / elapsed_time;
// limit the camera speed when jumping upwards
if(player->fall_mode != Player::FALLING
&& player->fall_mode != Player::TRAMPOLINE_JUMP) {
if(speed_y > max_speed_y)
speed_y = max_speed_y;
else if(speed_y < -max_speed_y)
speed_y = -max_speed_y;
}
// finally scroll with calculated speed
translation.y -= speed_y * elapsed_time;
}
/****** Horizontal scrolling part *******/
// our camera is either in leftscrolling, rightscrolling or nonscrollingmode.
// when suddenly changing directions while scrolling into the other direction.
// abort scrolling, since tux might be going left/right at a relatively small
// part of the map (like when jumping upwards)
if((player->dir == ::LEFT && scrollchange == RIGHT)
|| (player->dir == ::RIGHT && scrollchange == LEFT))
scrollchange = NONE;
// when in left 1/3rd of screen scroll left
if(player->get_bbox().get_middle().x < translation.x + SCREEN_WIDTH/3 - 16
&& do_backscrolling)
scrollchange = LEFT;
// scroll right when in right 1/3rd of screen
else if(player->get_bbox().get_middle().x > translation.x + SCREEN_WIDTH/3*2+16)
scrollchange = RIGHT;
// calculate our scroll target depending on scroll mode
float target_x;
if(scrollchange == LEFT)
target_x = player->get_bbox().get_middle().x - SCREEN_WIDTH/3*2;
else if(scrollchange == RIGHT)
target_x = player->get_bbox().get_middle().x - SCREEN_WIDTH/3;
else
target_x = translation.x;
// that's the distance we would have to travel to reach target_x
float delta_x = translation.x - target_x;
// the speed we'd need to travel to reach target_x in this frame
float speed_x = delta_x / elapsed_time;
// limit our speed
float maxv = 130 + (fabsf(player->physic.get_velocity_x() * 1.3));
if(speed_x > maxv)
speed_x = maxv;
else if(speed_x < -maxv)
speed_x = -maxv;
// apply scrolling
translation.x -= speed_x * elapsed_time;
keep_in_bounds(translation);
shake();
}
