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godot/scene/2d/path_2d.cpp
Rémi Verschelde d8223ffa75 Welcome in 2017, dear changelog reader! 
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!

(cherry picked from commit c7bc44d5ad)
2017-01-12 19:15:30 +01:00

380 lines
9.8 KiB
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/*************************************************************************/
/* path_2d.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 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()) {
//draw the curve!!
if (!get_tree()->is_editor_hint() && !get_tree()->is_debugging_navigation_hint()) {
return;
}
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");
}
_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.angle());
} 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"));
}
String PathFollow2D::get_configuration_warning() const {
if (!is_visible() || !is_inside_tree())
return String();
if (!get_parent() || !get_parent()->cast_to<Path2D>()) {
return TTR("PathFollow2D only works when set as a child of a Path2D node.");
}
return String();
}
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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