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minetest/src/camera.cpp

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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "camera.h"
#include "debug.h"
#include "client.h"
#include "map.h"
#include "clientmap.h" // MapDrawControl
#include "player.h"
#include <cmath>
#include "settings.h"
#include "wieldmesh.h"
#include "noise.h" // easeCurve
#include "sound.h"
#include "event.h"
#include "profiler.h"
#include "util/numeric.h"
#include "constants.h"
#include "fontengine.h"
#include "script/scripting_client.h"
#define CAMERA_OFFSET_STEP 200
#include "nodedef.h"
Camera::Camera(scene::ISceneManager* smgr, MapDrawControl& draw_control,
Client *client):
m_draw_control(draw_control),
m_client(client)
{
//dstream<<FUNCTION_NAME<<std::endl;
m_driver = smgr->getVideoDriver();
// note: making the camera node a child of the player node
// would lead to unexpected behaviour, so we don't do that.
m_playernode = smgr->addEmptySceneNode(smgr->getRootSceneNode());
m_headnode = smgr->addEmptySceneNode(m_playernode);
m_cameranode = smgr->addCameraSceneNode(smgr->getRootSceneNode());
m_cameranode->bindTargetAndRotation(true);
// This needs to be in its own scene manager. It is drawn after
// all other 3D scene nodes and before the GUI.
m_wieldmgr = smgr->createNewSceneManager();
m_wieldmgr->addCameraSceneNode();
m_wieldnode = new WieldMeshSceneNode(m_wieldmgr->getRootSceneNode(), m_wieldmgr, -1, false);
m_wieldnode->setItem(ItemStack(), m_client);
m_wieldnode->drop(); // m_wieldmgr grabbed it
/* TODO: Add a callback function so these can be updated when a setting
* changes. At this point in time it doesn't matter (e.g. /set
* is documented to change server settings only)
*
* TODO: Local caching of settings is not optimal and should at some stage
* be updated to use a global settings object for getting thse values
* (as opposed to the this local caching). This can be addressed in
* a later release.
*/
m_cache_fall_bobbing_amount = g_settings->getFloat("fall_bobbing_amount");
m_cache_view_bobbing_amount = g_settings->getFloat("view_bobbing_amount");
m_cache_fov = g_settings->getFloat("fov");
m_cache_zoom_fov = g_settings->getFloat("zoom_fov");
m_nametags.clear();
}
Camera::~Camera()
{
m_wieldmgr->drop();
}
bool Camera::successfullyCreated(std::string &error_message)
{
if (!m_playernode) {
error_message = "Failed to create the player scene node";
} else if (!m_headnode) {
error_message = "Failed to create the head scene node";
} else if (!m_cameranode) {
error_message = "Failed to create the camera scene node";
} else if (!m_wieldmgr) {
error_message = "Failed to create the wielded item scene manager";
} else if (!m_wieldnode) {
error_message = "Failed to create the wielded item scene node";
} else {
error_message.clear();
}
if (g_settings->getBool("enable_client_modding")) {
m_client->getScript()->on_camera_ready(this);
}
return error_message.empty();
}
// Returns the fractional part of x
inline f32 my_modf(f32 x)
{
double dummy;
return modf(x, &dummy);
}
void Camera::step(f32 dtime)
{
if(m_view_bobbing_fall > 0)
{
m_view_bobbing_fall -= 3 * dtime;
if(m_view_bobbing_fall <= 0)
m_view_bobbing_fall = -1; // Mark the effect as finished
}
bool was_under_zero = m_wield_change_timer < 0;
m_wield_change_timer = MYMIN(m_wield_change_timer + dtime, 0.125);
if (m_wield_change_timer >= 0 && was_under_zero)
m_wieldnode->setItem(m_wield_item_next, m_client);
if (m_view_bobbing_state != 0)
{
//f32 offset = dtime * m_view_bobbing_speed * 0.035;
f32 offset = dtime * m_view_bobbing_speed * 0.030;
if (m_view_bobbing_state == 2) {
// Animation is getting turned off
if (m_view_bobbing_anim < 0.25) {
m_view_bobbing_anim -= offset;
} else if (m_view_bobbing_anim > 0.75) {
m_view_bobbing_anim += offset;
}
if (m_view_bobbing_anim < 0.5) {
m_view_bobbing_anim += offset;
if (m_view_bobbing_anim > 0.5)
m_view_bobbing_anim = 0.5;
} else {
m_view_bobbing_anim -= offset;
if (m_view_bobbing_anim < 0.5)
m_view_bobbing_anim = 0.5;
}
if (m_view_bobbing_anim <= 0 || m_view_bobbing_anim >= 1 ||
fabs(m_view_bobbing_anim - 0.5) < 0.01) {
m_view_bobbing_anim = 0;
m_view_bobbing_state = 0;
}
}
else {
float was = m_view_bobbing_anim;
m_view_bobbing_anim = my_modf(m_view_bobbing_anim + offset);
bool step = (was == 0 ||
(was < 0.5f && m_view_bobbing_anim >= 0.5f) ||
(was > 0.5f && m_view_bobbing_anim <= 0.5f));
if(step) {
MtEvent *e = new SimpleTriggerEvent("ViewBobbingStep");
m_client->event()->put(e);
}
}
}
if (m_digging_button != -1)
{
f32 offset = dtime * 3.5;
float m_digging_anim_was = m_digging_anim;
m_digging_anim += offset;
if (m_digging_anim >= 1)
{
m_digging_anim = 0;
m_digging_button = -1;
}
float lim = 0.15;
if(m_digging_anim_was < lim && m_digging_anim >= lim)
{
if(m_digging_button == 0)
{
MtEvent *e = new SimpleTriggerEvent("CameraPunchLeft");
m_client->event()->put(e);
} else if(m_digging_button == 1) {
MtEvent *e = new SimpleTriggerEvent("CameraPunchRight");
m_client->event()->put(e);
}
}
}
}
void Camera::update(LocalPlayer* player, f32 frametime, f32 busytime,
f32 tool_reload_ratio, ClientEnvironment &c_env)
{
// Get player position
// Smooth the movement when walking up stairs
v3f old_player_position = m_playernode->getPosition();
v3f player_position = player->getPosition();
if (player->isAttached && player->parent)
player_position = player->parent->getPosition();
//if(player->touching_ground && player_position.Y > old_player_position.Y)
if(player->touching_ground &&
player_position.Y > old_player_position.Y)
{
f32 oldy = old_player_position.Y;
f32 newy = player_position.Y;
f32 t = exp(-23*frametime);
player_position.Y = oldy * t + newy * (1-t);
}
// Set player node transformation
m_playernode->setPosition(player_position);
m_playernode->setRotation(v3f(0, -1 * player->getYaw(), 0));
m_playernode->updateAbsolutePosition();
// Get camera tilt timer (hurt animation)
float cameratilt = fabs(fabs(player->hurt_tilt_timer-0.75)-0.75);
// Fall bobbing animation
float fall_bobbing = 0;
if(player->camera_impact >= 1 && m_camera_mode < CAMERA_MODE_THIRD)
{
if(m_view_bobbing_fall == -1) // Effect took place and has finished
player->camera_impact = m_view_bobbing_fall = 0;
else if(m_view_bobbing_fall == 0) // Initialize effect
m_view_bobbing_fall = 1;
// Convert 0 -> 1 to 0 -> 1 -> 0
fall_bobbing = m_view_bobbing_fall < 0.5 ? m_view_bobbing_fall * 2 : -(m_view_bobbing_fall - 0.5) * 2 + 1;
// Smoothen and invert the above
fall_bobbing = sin(fall_bobbing * 0.5 * M_PI) * -1;
// Amplify according to the intensity of the impact
fall_bobbing *= (1 - rangelim(50 / player->camera_impact, 0, 1)) * 5;
fall_bobbing *= m_cache_fall_bobbing_amount;
}
// Calculate players eye offset for different camera modes
v3f PlayerEyeOffset = player->getEyeOffset();
if (m_camera_mode == CAMERA_MODE_FIRST)
PlayerEyeOffset += player->eye_offset_first;
else
PlayerEyeOffset += player->eye_offset_third;
// Set head node transformation
m_headnode->setPosition(PlayerEyeOffset+v3f(0,cameratilt*-player->hurt_tilt_strength+fall_bobbing,0));
m_headnode->setRotation(v3f(player->getPitch(), 0, cameratilt*player->hurt_tilt_strength));
m_headnode->updateAbsolutePosition();
// Compute relative camera position and target
v3f rel_cam_pos = v3f(0,0,0);
v3f rel_cam_target = v3f(0,0,1);
v3f rel_cam_up = v3f(0,1,0);
if (m_cache_view_bobbing_amount != 0.0f && m_view_bobbing_anim != 0.0f &&
m_camera_mode < CAMERA_MODE_THIRD) {
f32 bobfrac = my_modf(m_view_bobbing_anim * 2);
f32 bobdir = (m_view_bobbing_anim < 0.5) ? 1.0 : -1.0;
#if 1
f32 bobknob = 1.2;
f32 bobtmp = sin(pow(bobfrac, bobknob) * M_PI);
//f32 bobtmp2 = cos(pow(bobfrac, bobknob) * M_PI);
v3f bobvec = v3f(
0.3 * bobdir * sin(bobfrac * M_PI),
-0.28 * bobtmp * bobtmp,
0.);
//rel_cam_pos += 0.2 * bobvec;
//rel_cam_target += 0.03 * bobvec;
//rel_cam_up.rotateXYBy(0.02 * bobdir * bobtmp * M_PI);
float f = 1.0;
f *= m_cache_view_bobbing_amount;
rel_cam_pos += bobvec * f;
//rel_cam_target += 0.995 * bobvec * f;
rel_cam_target += bobvec * f;
rel_cam_target.Z -= 0.005 * bobvec.Z * f;
//rel_cam_target.X -= 0.005 * bobvec.X * f;
//rel_cam_target.Y -= 0.005 * bobvec.Y * f;
rel_cam_up.rotateXYBy(-0.03 * bobdir * bobtmp * M_PI * f);
#else
f32 angle_deg = 1 * bobdir * sin(bobfrac * M_PI);
f32 angle_rad = angle_deg * M_PI / 180;
f32 r = 0.05;
v3f off = v3f(
r * sin(angle_rad),
r * (cos(angle_rad) - 1),
0);
rel_cam_pos += off;
//rel_cam_target += off;
rel_cam_up.rotateXYBy(angle_deg);
#endif
}
// Compute absolute camera position and target
m_headnode->getAbsoluteTransformation().transformVect(m_camera_position, rel_cam_pos);
m_headnode->getAbsoluteTransformation().rotateVect(m_camera_direction, rel_cam_target - rel_cam_pos);
v3f abs_cam_up;
m_headnode->getAbsoluteTransformation().rotateVect(abs_cam_up, rel_cam_up);
// Seperate camera position for calculation
v3f my_cp = m_camera_position;
// Reposition the camera for third person view
if (m_camera_mode > CAMERA_MODE_FIRST)
{
if (m_camera_mode == CAMERA_MODE_THIRD_FRONT)
m_camera_direction *= -1;
my_cp.Y += 2;
// Calculate new position
bool abort = false;
for (int i = BS; i <= BS*2.75; i++)
{
my_cp.X = m_camera_position.X + m_camera_direction.X*-i;
my_cp.Z = m_camera_position.Z + m_camera_direction.Z*-i;
if (i > 12)
my_cp.Y = m_camera_position.Y + (m_camera_direction.Y*-i);
// Prevent camera positioned inside nodes
INodeDefManager *nodemgr = m_client->ndef();
MapNode n = c_env.getClientMap().getNodeNoEx(floatToInt(my_cp, BS));
const ContentFeatures& features = nodemgr->get(n);
if(features.walkable)
{
my_cp.X += m_camera_direction.X*-1*-BS/2;
my_cp.Z += m_camera_direction.Z*-1*-BS/2;
my_cp.Y += m_camera_direction.Y*-1*-BS/2;
abort = true;
break;
}
}
// If node blocks camera position don't move y to heigh
if (abort && my_cp.Y > player_position.Y+BS*2)
my_cp.Y = player_position.Y+BS*2;
}
// Update offset if too far away from the center of the map
m_camera_offset.X += CAMERA_OFFSET_STEP*
(((s16)(my_cp.X/BS) - m_camera_offset.X)/CAMERA_OFFSET_STEP);
m_camera_offset.Y += CAMERA_OFFSET_STEP*
(((s16)(my_cp.Y/BS) - m_camera_offset.Y)/CAMERA_OFFSET_STEP);
m_camera_offset.Z += CAMERA_OFFSET_STEP*
(((s16)(my_cp.Z/BS) - m_camera_offset.Z)/CAMERA_OFFSET_STEP);
// Set camera node transformation
m_cameranode->setPosition(my_cp-intToFloat(m_camera_offset, BS));
m_cameranode->setUpVector(abs_cam_up);
// *100.0 helps in large map coordinates
m_cameranode->setTarget(my_cp-intToFloat(m_camera_offset, BS) + 100 * m_camera_direction);
// update the camera position in front-view mode to render blocks behind player
if (m_camera_mode == CAMERA_MODE_THIRD_FRONT)
m_camera_position = my_cp;
// Get FOV
f32 fov_degrees;
if (player->getPlayerControl().zoom && m_client->checkLocalPrivilege("zoom")) {
fov_degrees = m_cache_zoom_fov;
} else {
fov_degrees = m_cache_fov;
}
fov_degrees = rangelim(fov_degrees, 7.0, 160.0);
// FOV and aspect ratio
m_aspect = (f32) porting::getWindowSize().X / (f32) porting::getWindowSize().Y;
m_fov_y = fov_degrees * M_PI / 180.0;
// Increase vertical FOV on lower aspect ratios (<16:10)
m_fov_y *= MYMAX(1.0, MYMIN(1.4, sqrt(16./10. / m_aspect)));
m_fov_x = 2 * atan(m_aspect * tan(0.5 * m_fov_y));
m_cameranode->setAspectRatio(m_aspect);
m_cameranode->setFOV(m_fov_y);
float wieldmesh_offset_Y = -35 + player->getPitch() * 0.05;
wieldmesh_offset_Y = rangelim(wieldmesh_offset_Y, -52, -32);
// Position the wielded item
//v3f wield_position = v3f(45, -35, 65);
v3f wield_position = v3f(55, wieldmesh_offset_Y, 65);
//v3f wield_rotation = v3f(-100, 120, -100);
v3f wield_rotation = v3f(-100, 120, -100);
wield_position.Y += fabs(m_wield_change_timer)*320 - 40;
if(m_digging_anim < 0.05 || m_digging_anim > 0.5)
{
f32 frac = 1.0;
if(m_digging_anim > 0.5)
frac = 2.0 * (m_digging_anim - 0.5);
// This value starts from 1 and settles to 0
f32 ratiothing = pow((1.0f - tool_reload_ratio), 0.5f);
//f32 ratiothing2 = pow(ratiothing, 0.5f);
f32 ratiothing2 = (easeCurve(ratiothing*0.5))*2.0;
wield_position.Y -= frac * 25.0 * pow(ratiothing2, 1.7f);
//wield_position.Z += frac * 5.0 * ratiothing2;
wield_position.X -= frac * 35.0 * pow(ratiothing2, 1.1f);
wield_rotation.Y += frac * 70.0 * pow(ratiothing2, 1.4f);
//wield_rotation.X -= frac * 15.0 * pow(ratiothing2, 1.4f);
//wield_rotation.Z += frac * 15.0 * pow(ratiothing2, 1.0f);
}
if (m_digging_button != -1)
{
f32 digfrac = m_digging_anim;
wield_position.X -= 50 * sin(pow(digfrac, 0.8f) * M_PI);
wield_position.Y += 24 * sin(digfrac * 1.8 * M_PI);
wield_position.Z += 25 * 0.5;
// Euler angles are PURE EVIL, so why not use quaternions?
core::quaternion quat_begin(wield_rotation * core::DEGTORAD);
core::quaternion quat_end(v3f(80, 30, 100) * core::DEGTORAD);
core::quaternion quat_slerp;
quat_slerp.slerp(quat_begin, quat_end, sin(digfrac * M_PI));
quat_slerp.toEuler(wield_rotation);
wield_rotation *= core::RADTODEG;
} else {
f32 bobfrac = my_modf(m_view_bobbing_anim);
wield_position.X -= sin(bobfrac*M_PI*2.0) * 3.0;
wield_position.Y += sin(my_modf(bobfrac*2.0)*M_PI) * 3.0;
}
m_wieldnode->setPosition(wield_position);
m_wieldnode->setRotation(wield_rotation);
m_wieldnode->setColor(player->light_color);
// Set render distance
updateViewingRange();
// If the player is walking, swimming, or climbing,
// view bobbing is enabled and free_move is off,
// start (or continue) the view bobbing animation.
v3f speed = player->getSpeed();
const bool movement_XZ = hypot(speed.X, speed.Z) > BS;
const bool movement_Y = fabs(speed.Y) > BS;
const bool walking = movement_XZ && player->touching_ground;
const bool swimming = (movement_XZ || player->swimming_vertical) && player->in_liquid;
const bool climbing = movement_Y && player->is_climbing;
if ((walking || swimming || climbing) &&
(!g_settings->getBool("free_move") || !m_client->checkLocalPrivilege("fly"))) {
// Start animation
m_view_bobbing_state = 1;
m_view_bobbing_speed = MYMIN(speed.getLength(), 70);
}
else if (m_view_bobbing_state == 1)
{
// Stop animation
m_view_bobbing_state = 2;
m_view_bobbing_speed = 60;
}
}
void Camera::updateViewingRange()
{
f32 viewing_range = g_settings->getFloat("viewing_range");
m_draw_control.wanted_range = viewing_range;
if (m_draw_control.range_all) {
m_cameranode->setFarValue(100000.0);
return;
}
m_cameranode->setFarValue((viewing_range < 2000) ? 2000 * BS : viewing_range * BS);
}
void Camera::setDigging(s32 button)
{
if (m_digging_button == -1)
m_digging_button = button;
}
void Camera::wield(const ItemStack &item)
{
if (item.name != m_wield_item_next.name ||
item.metadata != m_wield_item_next.metadata) {
m_wield_item_next = item;
if (m_wield_change_timer > 0)
m_wield_change_timer = -m_wield_change_timer;
else if (m_wield_change_timer == 0)
m_wield_change_timer = -0.001;
}
}
void Camera::drawWieldedTool(irr::core::matrix4* translation)
{
// Clear Z buffer so that the wielded tool stay in front of world geometry
m_wieldmgr->getVideoDriver()->clearZBuffer();
// Draw the wielded node (in a separate scene manager)
scene::ICameraSceneNode* cam = m_wieldmgr->getActiveCamera();
cam->setAspectRatio(m_cameranode->getAspectRatio());
cam->setFOV(72.0*M_PI/180.0);
cam->setNearValue(10);
cam->setFarValue(1000);
if (translation != NULL)
{
irr::core::matrix4 startMatrix = cam->getAbsoluteTransformation();
irr::core::vector3df focusPoint = (cam->getTarget()
- cam->getAbsolutePosition()).setLength(1)
+ cam->getAbsolutePosition();
irr::core::vector3df camera_pos =
(startMatrix * *translation).getTranslation();
cam->setPosition(camera_pos);
cam->setTarget(focusPoint);
}
m_wieldmgr->drawAll();
}
void Camera::drawNametags()
{
core::matrix4 trans = m_cameranode->getProjectionMatrix();
trans *= m_cameranode->getViewMatrix();
for (std::list<Nametag *>::const_iterator
i = m_nametags.begin();
i != m_nametags.end(); ++i) {
Nametag *nametag = *i;
if (nametag->nametag_color.getAlpha() == 0) {
// Enforce hiding nametag,
// because if freetype is enabled, a grey
// shadow can remain.
continue;
}
v3f pos = nametag->parent_node->getAbsolutePosition() + v3f(0.0, 1.1 * BS, 0.0);
f32 transformed_pos[4] = { pos.X, pos.Y, pos.Z, 1.0f };
trans.multiplyWith1x4Matrix(transformed_pos);
if (transformed_pos[3] > 0) {
std::string nametag_colorless = unescape_enriched(nametag->nametag_text);
core::dimension2d<u32> textsize =
g_fontengine->getFont()->getDimension(
utf8_to_wide(nametag_colorless).c_str());
f32 zDiv = transformed_pos[3] == 0.0f ? 1.0f :
core::reciprocal(transformed_pos[3]);
v2u32 screensize = m_driver->getScreenSize();
v2s32 screen_pos;
screen_pos.X = screensize.X *
(0.5 * transformed_pos[0] * zDiv + 0.5) - textsize.Width / 2;
screen_pos.Y = screensize.Y *
(0.5 - transformed_pos[1] * zDiv * 0.5) - textsize.Height / 2;
core::rect<s32> size(0, 0, textsize.Width, textsize.Height);
g_fontengine->getFont()->draw(utf8_to_wide(nametag->nametag_text).c_str(),
size + screen_pos, nametag->nametag_color);
}
}
}
Nametag *Camera::addNametag(scene::ISceneNode *parent_node,
std::string nametag_text, video::SColor nametag_color)
{
Nametag *nametag = new Nametag(parent_node, nametag_text, nametag_color);
m_nametags.push_back(nametag);
return nametag;
}
void Camera::removeNametag(Nametag *nametag)
{
m_nametags.remove(nametag);
delete nametag;
}
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