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godot/scene/2d/path_2d.cpp

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/*************************************************************************/
/* path_2d.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "path_2d.h"
#include "scene/scene_string_names.h"
void Path2D::_notification(int p_what) {
if (p_what==NOTIFICATION_DRAW && curve.is_valid() && is_inside_tree() && get_tree()->is_editor_hint()) {
//draw the curve!!
for(int i=0;i<curve->get_point_count();i++) {
Vector2 prev_p=curve->get_point_pos(i);
for(int j=1;j<=8;j++) {
real_t frac = j/8.0;
Vector2 p = curve->interpolate(i,frac);
draw_line(prev_p,p,Color(0.5,0.6,1.0,0.7),2);
prev_p=p;
}
}
}
}
void Path2D::_curve_changed() {
if (is_inside_tree() && get_tree()->is_editor_hint())
update();
}
void Path2D::set_curve(const Ref<Curve2D>& p_curve) {
if (curve.is_valid()) {
curve->disconnect("changed",this,"_curve_changed");
}
curve=p_curve;
if (curve.is_valid()) {
curve->connect("changed",this,"_curve_changed");
}
}
Ref<Curve2D> Path2D::get_curve() const{
return curve;
}
void Path2D::_bind_methods() {
ObjectTypeDB::bind_method(_MD("set_curve","curve:Curve2D"),&Path2D::set_curve);
ObjectTypeDB::bind_method(_MD("get_curve:Curve2D","curve"),&Path2D::get_curve);
ObjectTypeDB::bind_method(_MD("_curve_changed"),&Path2D::_curve_changed);
ADD_PROPERTY( PropertyInfo( Variant::OBJECT, "curve", PROPERTY_HINT_RESOURCE_TYPE, "Curve2D"), _SCS("set_curve"),_SCS("get_curve"));
}
Path2D::Path2D() {
set_curve(Ref<Curve2D>( memnew( Curve2D ))); //create one by default
}
/////////////////////////////////////////////////////////////////////////////////
void PathFollow2D::_update_transform() {
if (!path)
return;
Ref<Curve2D> c =path->get_curve();
if (!c.is_valid())
return;
float o = offset;
if (loop)
o=Math::fposmod(o,c->get_baked_length());
Vector2 pos = c->interpolate_baked(o,cubic);
if (rotate) {
Vector2 n = (c->interpolate_baked(o+lookahead,cubic)-pos).normalized();
Vector2 t = -n.tangent();
pos+=n*h_offset;
pos+=t*v_offset;
set_rot(t.atan2());
} else {
pos.x+=h_offset;
pos.y+=v_offset;
}
set_pos(pos);
}
void PathFollow2D::_notification(int p_what) {
switch(p_what) {
case NOTIFICATION_ENTER_TREE: {
Node *parent=get_parent();
if (parent) {
path=parent->cast_to<Path2D>();
if (path) {
_update_transform();
}
}
} break;
case NOTIFICATION_EXIT_TREE: {
path=NULL;
} break;
}
}
void PathFollow2D::set_cubic_interpolation(bool p_enable) {
cubic=p_enable;
}
bool PathFollow2D::get_cubic_interpolation() const {
return cubic;
}
bool PathFollow2D::_set(const StringName& p_name, const Variant& p_value) {
if (p_name==SceneStringNames::get_singleton()->offset) {
set_offset(p_value);
} else if (p_name==SceneStringNames::get_singleton()->unit_offset) {
set_unit_offset(p_value);
} else if (p_name==SceneStringNames::get_singleton()->rotate) {
set_rotate(p_value);
} else if (p_name==SceneStringNames::get_singleton()->v_offset) {
set_v_offset(p_value);
} else if (p_name==SceneStringNames::get_singleton()->h_offset) {
set_h_offset(p_value);
} else if (String(p_name)=="cubic_interp") {
set_cubic_interpolation(p_value);
} else if (String(p_name)=="loop") {
set_loop(p_value);
} else if (String(p_name)=="lookahead") {
set_lookahead(p_value);
} else
return false;
return true;
}
bool PathFollow2D::_get(const StringName& p_name,Variant &r_ret) const{
if (p_name==SceneStringNames::get_singleton()->offset) {
r_ret=get_offset();
} else if (p_name==SceneStringNames::get_singleton()->unit_offset) {
r_ret=get_unit_offset();
} else if (p_name==SceneStringNames::get_singleton()->rotate) {
r_ret=is_rotating();
} else if (p_name==SceneStringNames::get_singleton()->v_offset) {
r_ret=get_v_offset();
} else if (p_name==SceneStringNames::get_singleton()->h_offset) {
r_ret=get_h_offset();
} else if (String(p_name)=="cubic_interp") {
r_ret=cubic;
} else if (String(p_name)=="loop") {
r_ret=loop;
} else if (String(p_name)=="lookahead") {
r_ret=lookahead;
} else
return false;
return true;
}
void PathFollow2D::_get_property_list( List<PropertyInfo> *p_list) const{
float max=10000;
if (path && path->get_curve().is_valid())
max=path->get_curve()->get_baked_length();
p_list->push_back( PropertyInfo( Variant::REAL, "offset", PROPERTY_HINT_RANGE,"0,"+rtos(max)+",0.01"));
p_list->push_back( PropertyInfo( Variant::REAL, "unit_offset", PROPERTY_HINT_RANGE,"0,1,0.0001",PROPERTY_USAGE_EDITOR));
p_list->push_back( PropertyInfo( Variant::REAL, "h_offset") );
p_list->push_back( PropertyInfo( Variant::REAL, "v_offset") );
p_list->push_back( PropertyInfo( Variant::BOOL, "rotate") );
p_list->push_back( PropertyInfo( Variant::BOOL, "cubic_interp"));
p_list->push_back( PropertyInfo( Variant::BOOL, "loop"));
p_list->push_back( PropertyInfo( Variant::REAL, "lookahead",PROPERTY_HINT_RANGE,"0.001,1024.0,0.001"));
}
void PathFollow2D::_bind_methods() {
ObjectTypeDB::bind_method(_MD("set_offset","offset"),&PathFollow2D::set_offset);
ObjectTypeDB::bind_method(_MD("get_offset"),&PathFollow2D::get_offset);
ObjectTypeDB::bind_method(_MD("set_h_offset","h_offset"),&PathFollow2D::set_h_offset);
ObjectTypeDB::bind_method(_MD("get_h_offset"),&PathFollow2D::get_h_offset);
ObjectTypeDB::bind_method(_MD("set_v_offset","v_offset"),&PathFollow2D::set_v_offset);
ObjectTypeDB::bind_method(_MD("get_v_offset"),&PathFollow2D::get_v_offset);
ObjectTypeDB::bind_method(_MD("set_unit_offset","unit_offset"),&PathFollow2D::set_unit_offset);
ObjectTypeDB::bind_method(_MD("get_unit_offset"),&PathFollow2D::get_unit_offset);
ObjectTypeDB::bind_method(_MD("set_rotate","enable"),&PathFollow2D::set_rotate);
ObjectTypeDB::bind_method(_MD("is_rotating"),&PathFollow2D::is_rotating);
ObjectTypeDB::bind_method(_MD("set_cubic_interpolation","enable"),&PathFollow2D::set_cubic_interpolation);
ObjectTypeDB::bind_method(_MD("get_cubic_interpolation"),&PathFollow2D::get_cubic_interpolation);
ObjectTypeDB::bind_method(_MD("set_loop","loop"),&PathFollow2D::set_loop);
ObjectTypeDB::bind_method(_MD("has_loop"),&PathFollow2D::has_loop);
}
void PathFollow2D::set_offset(float p_offset) {
offset=p_offset;
if (path)
_update_transform();
_change_notify("offset");
_change_notify("unit_offset");
}
void PathFollow2D::set_h_offset(float p_h_offset) {
h_offset=p_h_offset;
if (path)
_update_transform();
}
float PathFollow2D::get_h_offset() const {
return h_offset;
}
void PathFollow2D::set_v_offset(float p_v_offset) {
v_offset=p_v_offset;
if (path)
_update_transform();
}
float PathFollow2D::get_v_offset() const {
return v_offset;
}
float PathFollow2D::get_offset() const{
return offset;
}
void PathFollow2D::set_unit_offset(float p_unit_offset) {
if (path && path->get_curve().is_valid() && path->get_curve()->get_baked_length())
set_offset(p_unit_offset*path->get_curve()->get_baked_length());
}
float PathFollow2D::get_unit_offset() const{
if (path && path->get_curve().is_valid() && path->get_curve()->get_baked_length())
return get_offset()/path->get_curve()->get_baked_length();
else
return 0;
}
void PathFollow2D::set_lookahead(float p_lookahead) {
lookahead=p_lookahead;
}
float PathFollow2D::get_lookahead() const{
return lookahead;
}
void PathFollow2D::set_rotate(bool p_rotate) {
rotate=p_rotate;
_update_transform();
}
bool PathFollow2D::is_rotating() const {
return rotate;
}
void PathFollow2D::set_loop(bool p_loop) {
loop=p_loop;
}
bool PathFollow2D::has_loop() const{
return loop;
}
PathFollow2D::PathFollow2D() {
offset=0;
h_offset=0;
v_offset=0;
path=NULL;
rotate=true;
cubic=true;
loop=true;
lookahead=4;
}
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