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godot/scene/resources/curve.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

1395 lines
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/*************************************************************************/
/* curve.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 "curve.h"
#include "core_string_names.h"
template<class T>
static _FORCE_INLINE_ T _bezier_interp(real_t t, T start, T control_1, T control_2, T end) {
/* Formula from Wikipedia article on Bezier curves. */
real_t omt = (1.0 - t);
real_t omt2 = omt*omt;
real_t omt3 = omt2*omt;
real_t t2 = t*t;
real_t t3 = t2*t;
return start * omt3
+ control_1 * omt2 * t * 3.0
+ control_2 * omt * t2 * 3.0
+ end * t3;
}
#if 0
int Curve2D::get_point_count() const {
return points.size();
}
void Curve2D::add_point(const Vector2& p_pos, const Vector2& p_in, const Vector2& p_out) {
Point n;
n.pos=p_pos;
n.in=p_in;
n.out=p_out;
points.push_back(n);
emit_signal(CoreStringNames::get_singleton()->changed);
}
void Curve2D::set_point_pos(int p_index, const Vector2& p_pos) {
ERR_FAIL_INDEX(p_index,points.size());
points[p_index].pos=p_pos;
emit_signal(CoreStringNames::get_singleton()->changed);
}
Vector2 Curve2D::get_point_pos(int p_index) const {
ERR_FAIL_INDEX_V(p_index,points.size(),Vector2());
return points[p_index].pos;
}
void Curve2D::set_point_in(int p_index, const Vector2& p_in) {
ERR_FAIL_INDEX(p_index,points.size());
points[p_index].in=p_in;
emit_signal(CoreStringNames::get_singleton()->changed);
}
Vector2 Curve2D::get_point_in(int p_index) const {
ERR_FAIL_INDEX_V(p_index,points.size(),Vector2());
return points[p_index].in;
}
void Curve2D::set_point_out(int p_index, const Vector2& p_out) {
ERR_FAIL_INDEX(p_index,points.size());
points[p_index].out=p_out;
emit_signal(CoreStringNames::get_singleton()->changed);
}
Vector2 Curve2D::get_point_out(int p_index) const {
ERR_FAIL_INDEX_V(p_index,points.size(),Vector2());
return points[p_index].out;
}
void Curve2D::remove_point(int p_index) {
ERR_FAIL_INDEX(p_index,points.size());
points.remove(p_index);
emit_signal(CoreStringNames::get_singleton()->changed);
}
Vector2 Curve2D::interpolate(int p_index, float p_offset) const {
int pc = points.size();
ERR_FAIL_COND_V(pc==0,Vector2());
if (p_index >= pc-1)
return points[pc-1].pos;
else if (p_index<0)
return points[0].pos;
Vector2 p0 = points[p_index].pos;
Vector2 p1 = p0+points[p_index].out;
Vector2 p3 = points[p_index+1].pos;
Vector2 p2 = p3+points[p_index+1].in;
return _bezier_interp(p_offset,p0,p1,p2,p3);
}
Vector2 Curve2D::interpolatef(real_t p_findex) const {
if (p_findex<0)
p_findex=0;
else if (p_findex>=points.size())
p_findex=points.size();
return interpolate((int)p_findex,Math::fmod(p_findex,1.0));
}
DVector<Point2> Curve2D::bake(int p_subdivs) const {
int pc = points.size();
DVector<Point2> ret;
if (pc<2)
return ret;
ret.resize((pc-1)*p_subdivs+1);
DVector<Point2>::Write w = ret.write();
const Point *r = points.ptr();
for(int i=0;i<pc;i++) {
int ofs = pc*p_subdivs;
int limit=(i==pc-1)?p_subdivs+1:p_subdivs;
for(int j=0;j<limit;j++) {
Vector2 p0 = r[i].pos;
Vector2 p1 = p0+r[i].out;
Vector2 p3 = r[i].pos;
Vector2 p2 = p3+r[i].in;
real_t t = j/(real_t)p_subdivs;
w[ofs+j]=_bezier_interp(t,p0,p1,p2,p3);
}
}
w = DVector<Point2>::Write();
return ret;
}
void Curve2D::advance(real_t p_distance,int &r_index, real_t &r_pos) const {
int pc = points.size();
ERR_FAIL_COND(pc<2);
if (r_index<0 || r_index>=(pc-1))
return;
Vector2 pos = interpolate(r_index,r_pos);
float sign=p_distance<0 ? -1 : 1;
p_distance=Math::abs(p_distance);
real_t base = r_index+r_pos;
real_t top = 0.1; //a tenth is in theory representative
int iterations=32;
for(int i=0;i<iterations;i++) {
real_t o=base+top*sign;
if (sign>0 && o >=pc) {
top=pc-base;
break;
} else if (sign<0 && o <0) {
top=-base;
break;
}
Vector2 new_d = interpolatef(o);
if (new_d.distance_to(pos) > p_distance)
break;
top*=2.0;
}
real_t bottom = 0.0;
iterations=8;
real_t final_offset;
for(int i=0;i<iterations;i++) {
real_t middle = (bottom+top)*0.5;
real_t o=base+middle*sign;
Vector2 new_d = interpolatef(o);
if (new_d.distance_to(pos) > p_distance) {
bottom=middle;
} else {
top=middle;
}
final_offset=o;
}
r_index=(int)final_offset;
r_pos=Math::fmod(final_offset,1.0);
}
void Curve2D::get_approx_position_from_offset(real_t p_offset,int &r_index, real_t &r_pos,int p_subdivs) const {
ERR_FAIL_COND(points.size()<2);
real_t accum=0;
for(int i=0;i<points.size();i++) {
Vector2 prev_p=interpolate(i,0);
for(int j=1;j<=p_subdivs;j++) {
real_t frac = j/(real_t)p_subdivs;
Vector2 p = interpolate(i,frac);
real_t d = p.distance_to(prev_p);
accum+=d;
if (accum>p_offset) {
r_index=j-1;
if (d>0) {
real_t mf = (p_offset-(accum-d)) / d;
r_pos=frac-(1.0-mf);
} else {
r_pos=frac;
}
return;
}
prev_p=p;
}
}
r_index=points.size()-1;
r_pos=1.0;
}
void Curve2D::set_points_in(const Vector2Array& p_points) {
points.resize(p_points.size());
for (int i=0; i<p_points.size(); i++) {
Point p = points[i];
p.in = p_points[i];
points[i] = p;
};
};
void Curve2D::set_points_out(const Vector2Array& p_points) {
points.resize(p_points.size());
for (int i=0; i<p_points.size(); i++) {
Point p = points[i];
p.out = p_points[i];
points[i] = p;
};
};
void Curve2D::set_points_pos(const Vector2Array& p_points) {
points.resize(p_points.size());
for (int i=0; i<p_points.size(); i++) {
Point p = points[i];
p.pos = p_points[i];
points[i] = p;
};
};
Vector2Array Curve2D::get_points_in() const {
Vector2Array ret;
ret.resize(points.size());
for (int i=0; i<points.size(); i++) {
ret.set(i, points[i].in);
};
return ret;
};
Vector2Array Curve2D::get_points_out() const {
Vector2Array ret;
ret.resize(points.size());
for (int i=0; i<points.size(); i++) {
ret.set(i, points[i].out);
};
return ret;
};
Vector2Array Curve2D::get_points_pos() const {
Vector2Array ret;
ret.resize(points.size());
for (int i=0; i<points.size(); i++) {
ret.set(i, points[i].pos);
};
return ret;
};
void Curve2D::_bind_methods() {
ObjectTypeDB::bind_method(_MD("get_point_count"),&Curve2D::get_point_count);
ObjectTypeDB::bind_method(_MD("add_point","pos","in","out"),&Curve2D::add_point,DEFVAL(Vector2()),DEFVAL(Vector2()));
ObjectTypeDB::bind_method(_MD("set_point_pos","idx","pos"),&Curve2D::set_point_pos);
ObjectTypeDB::bind_method(_MD("get_point_pos","idx"),&Curve2D::get_point_pos);
ObjectTypeDB::bind_method(_MD("set_point_in","idx","pos"),&Curve2D::set_point_in);
ObjectTypeDB::bind_method(_MD("get_point_in","idx"),&Curve2D::get_point_in);
ObjectTypeDB::bind_method(_MD("set_point_out","idx","pos"),&Curve2D::set_point_out);
ObjectTypeDB::bind_method(_MD("get_point_out","idx"),&Curve2D::get_point_out);
ObjectTypeDB::bind_method(_MD("remove_point","idx"),&Curve2D::remove_point);
ObjectTypeDB::bind_method(_MD("interpolate","idx","t"),&Curve2D::interpolate);
ObjectTypeDB::bind_method(_MD("bake","subdivs"),&Curve2D::bake,DEFVAL(10));
ObjectTypeDB::bind_method(_MD("set_points_in"),&Curve2D::set_points_in);
ObjectTypeDB::bind_method(_MD("set_points_out"),&Curve2D::set_points_out);
ObjectTypeDB::bind_method(_MD("set_points_pos"),&Curve2D::set_points_pos);
ObjectTypeDB::bind_method(_MD("get_points_in"),&Curve2D::get_points_in);
ObjectTypeDB::bind_method(_MD("get_points_out"),&Curve2D::get_points_out);
ObjectTypeDB::bind_method(_MD("get_points_pos"),&Curve2D::get_points_pos);
ADD_PROPERTY( PropertyInfo( Variant::VECTOR2_ARRAY, "points_in"), _SCS("set_points_in"),_SCS("get_points_in"));
ADD_PROPERTY( PropertyInfo( Variant::VECTOR2_ARRAY, "points_out"), _SCS("set_points_out"),_SCS("get_points_out"));
ADD_PROPERTY( PropertyInfo( Variant::VECTOR2_ARRAY, "points_pos"), _SCS("set_points_pos"),_SCS("get_points_pos"));
}
Curve2D::Curve2D()
{
}
#endif
int Curve2D::get_point_count() const {
return points.size();
}
void Curve2D::add_point(const Vector2& p_pos, const Vector2& p_in, const Vector2& p_out,int p_atpos) {
Point n;
n.pos=p_pos;
n.in=p_in;
n.out=p_out;
if (p_atpos>=0 && p_atpos<points.size())
points.insert(p_atpos,n);
else
points.push_back(n);
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
void Curve2D::set_point_pos(int p_index, const Vector2& p_pos) {
ERR_FAIL_INDEX(p_index,points.size());
points[p_index].pos=p_pos;
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
Vector2 Curve2D::get_point_pos(int p_index) const {
ERR_FAIL_INDEX_V(p_index,points.size(),Vector2());
return points[p_index].pos;
}
void Curve2D::set_point_in(int p_index, const Vector2& p_in) {
ERR_FAIL_INDEX(p_index,points.size());
points[p_index].in=p_in;
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
Vector2 Curve2D::get_point_in(int p_index) const {
ERR_FAIL_INDEX_V(p_index,points.size(),Vector2());
return points[p_index].in;
}
void Curve2D::set_point_out(int p_index, const Vector2& p_out) {
ERR_FAIL_INDEX(p_index,points.size());
points[p_index].out=p_out;
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
Vector2 Curve2D::get_point_out(int p_index) const {
ERR_FAIL_INDEX_V(p_index,points.size(),Vector2());
return points[p_index].out;
}
void Curve2D::remove_point(int p_index) {
ERR_FAIL_INDEX(p_index,points.size());
points.remove(p_index);
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
void Curve2D::clear_points() {
if (!points.empty()) {
points.clear();
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
}
Vector2 Curve2D::interpolate(int p_index, float p_offset) const {
int pc = points.size();
ERR_FAIL_COND_V(pc==0,Vector2());
if (p_index >= pc-1)
return points[pc-1].pos;
else if (p_index<0)
return points[0].pos;
Vector2 p0 = points[p_index].pos;
Vector2 p1 = p0+points[p_index].out;
Vector2 p3 = points[p_index+1].pos;
Vector2 p2 = p3+points[p_index+1].in;
return _bezier_interp(p_offset,p0,p1,p2,p3);
}
Vector2 Curve2D::interpolatef(real_t p_findex) const {
if (p_findex<0)
p_findex=0;
else if (p_findex>=points.size())
p_findex=points.size();
return interpolate((int)p_findex,Math::fmod(p_findex,1.0));
}
void Curve2D::_bake_segment2d(Map<float,Vector2>& r_bake, float p_begin, float p_end,const Vector2& p_a,const Vector2& p_out,const Vector2& p_b, const Vector2& p_in,int p_depth,int p_max_depth,float p_tol) const {
float mp = p_begin+(p_end-p_begin)*0.5;
Vector2 beg = _bezier_interp(p_begin,p_a,p_a+p_out,p_b+p_in,p_b);
Vector2 mid = _bezier_interp(mp,p_a,p_a+p_out,p_b+p_in,p_b);
Vector2 end = _bezier_interp(p_end,p_a,p_a+p_out,p_b+p_in,p_b);
Vector2 na = (mid-beg).normalized();
Vector2 nb = (end-mid).normalized();
float dp = na.dot(nb);
if (dp<Math::cos(Math::deg2rad(p_tol))) {
r_bake[mp]=mid;
}
if (p_depth<p_max_depth) {
_bake_segment2d(r_bake,p_begin,mp,p_a,p_out,p_b,p_in,p_depth+1,p_max_depth,p_tol);
_bake_segment2d(r_bake,mp,p_end,p_a,p_out,p_b,p_in,p_depth+1,p_max_depth,p_tol);
}
}
void Curve2D::_bake() const {
if (!baked_cache_dirty)
return;
baked_max_ofs=0;
baked_cache_dirty=false;
if (points.size()==0) {
baked_point_cache.resize(0);
return;
}
if (points.size()==1) {
baked_point_cache.resize(1);
baked_point_cache.set(0,points[0].pos);
return;
}
Vector2 pos=points[0].pos;
List<Vector2> pointlist;
pointlist.push_back(pos); //start always from origin
for(int i=0;i<points.size()-1;i++) {
float step = 0.1; // at least 10 substeps ought to be enough?
float p = 0;
while(p<1.0) {
float np=p+step;
if (np>1.0)
np=1.0;
Vector2 npp = _bezier_interp(np, points[i].pos,points[i].pos+points[i].out,points[i+1].pos+points[i+1].in,points[i+1].pos);
float d = pos.distance_to(npp);
if (d>bake_interval) {
// OK! between P and NP there _has_ to be Something, let's go searching!
int iterations = 10; //lots of detail!
float low = p;
float hi = np;
float mid = low+(hi-low)*0.5;
for(int j=0;j<iterations;j++) {
npp = _bezier_interp(mid, points[i].pos,points[i].pos+points[i].out,points[i+1].pos+points[i+1].in,points[i+1].pos);
d = pos.distance_to(npp);
if (bake_interval < d)
hi=mid;
else
low=mid;
mid = low+(hi-low)*0.5;
}
pos=npp;
p=mid;
pointlist.push_back(pos);
} else {
p=np;
}
}
}
Vector2 lastpos = points[points.size()-1].pos;
float rem = pos.distance_to(lastpos);
baked_max_ofs=(pointlist.size()-1)*bake_interval+rem;
pointlist.push_back(lastpos);
baked_point_cache.resize(pointlist.size());
Vector2Array::Write w = baked_point_cache.write();
int idx=0;
for(List<Vector2>::Element *E=pointlist.front();E;E=E->next()) {
w[idx]=E->get();
idx++;
}
}
float Curve2D::get_baked_length() const {
if (baked_cache_dirty)
_bake();
return baked_max_ofs;
}
Vector2 Curve2D::interpolate_baked(float p_offset,bool p_cubic) const{
if (baked_cache_dirty)
_bake();
//validate//
int pc = baked_point_cache.size();
if (pc==0) {
ERR_EXPLAIN("No points in Curve2D");
ERR_FAIL_COND_V(pc==0,Vector2());
}
if (pc==1)
return baked_point_cache.get(0);
int bpc=baked_point_cache.size();
Vector2Array::Read r = baked_point_cache.read();
if (p_offset<0)
return r[0];
if (p_offset>=baked_max_ofs)
return r[bpc-1];
int idx = Math::floor((double)p_offset/(double)bake_interval);
float frac = Math::fmod(p_offset,bake_interval);
if (idx>=bpc-1) {
return r[bpc-1];
} else if (idx==bpc-2) {
frac/=Math::fmod(baked_max_ofs,bake_interval);
} else {
frac/=bake_interval;
}
if (p_cubic) {
Vector2 pre = idx>0? r[idx-1] : r[idx];
Vector2 post = (idx<(bpc-2))? r[idx+2] : r[idx+1];
return r[idx].cubic_interpolate(r[idx+1],pre,post,frac);
} else {
return r[idx].linear_interpolate(r[idx+1],frac);
}
}
Vector2Array Curve2D::get_baked_points() const {
if (baked_cache_dirty)
_bake();
return baked_point_cache;
}
void Curve2D::set_bake_interval(float p_tolerance){
bake_interval=p_tolerance;
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
float Curve2D::get_bake_interval() const{
return bake_interval;
}
Dictionary Curve2D::_get_data() const {
Dictionary dc;
Vector2Array d;
d.resize(points.size()*3);
Vector2Array::Write w = d.write();
for(int i=0;i<points.size();i++) {
w[i*3+0]=points[i].in;
w[i*3+1]=points[i].out;
w[i*3+2]=points[i].pos;
}
w=Vector2Array::Write();
dc["points"]=d;
return dc;
}
void Curve2D::_set_data(const Dictionary& p_data){
ERR_FAIL_COND(!p_data.has("points"));
Vector2Array rp=p_data["points"];
int pc = rp.size();
ERR_FAIL_COND(pc%3!=0);
points.resize(pc/3);
Vector2Array::Read r = rp.read();
for(int i=0;i<points.size();i++) {
points[i].in=r[i*3+0];
points[i].out=r[i*3+1];
points[i].pos=r[i*3+2];
}
baked_cache_dirty=true;
}
Vector2Array Curve2D::tesselate(int p_max_stages,float p_tolerance) const {
Vector2Array tess;
if (points.size()==0) {
return tess;
}
Vector< Map<float,Vector2> > midpoints;
midpoints.resize(points.size()-1);
int pc=1;
for(int i=0;i<points.size()-1;i++) {
_bake_segment2d(midpoints[i],0,1,points[i].pos,points[i].out,points[i+1].pos,points[i+1].in,0,p_max_stages,p_tolerance);
pc++;
pc+=midpoints[i].size();
}
tess.resize(pc);
Vector2Array::Write bpw=tess.write();
bpw[0]=points[0].pos;
int pidx=0;
for(int i=0;i<points.size()-1;i++) {
for(Map<float,Vector2>::Element *E=midpoints[i].front();E;E=E->next()) {
pidx++;
bpw[pidx] = E->get();
}
pidx++;
bpw[pidx] = points[i+1].pos;
}
bpw=Vector2Array::Write ();
return tess;
}
void Curve2D::_bind_methods() {
ObjectTypeDB::bind_method(_MD("get_point_count"),&Curve2D::get_point_count);
ObjectTypeDB::bind_method(_MD("add_point","pos","in","out","atpos"),&Curve2D::add_point,DEFVAL(Vector2()),DEFVAL(Vector2()),DEFVAL(-1));
ObjectTypeDB::bind_method(_MD("set_point_pos","idx","pos"),&Curve2D::set_point_pos);
ObjectTypeDB::bind_method(_MD("get_point_pos","idx"),&Curve2D::get_point_pos);
ObjectTypeDB::bind_method(_MD("set_point_in","idx","pos"),&Curve2D::set_point_in);
ObjectTypeDB::bind_method(_MD("get_point_in","idx"),&Curve2D::get_point_in);
ObjectTypeDB::bind_method(_MD("set_point_out","idx","pos"),&Curve2D::set_point_out);
ObjectTypeDB::bind_method(_MD("get_point_out","idx"),&Curve2D::get_point_out);
ObjectTypeDB::bind_method(_MD("remove_point","idx"),&Curve2D::remove_point);
ObjectTypeDB::bind_method(_MD("clear_points"),&Curve2D::clear_points);
ObjectTypeDB::bind_method(_MD("interpolate","idx","t"),&Curve2D::interpolate);
ObjectTypeDB::bind_method(_MD("interpolatef","fofs"),&Curve2D::interpolatef);
//ObjectTypeDB::bind_method(_MD("bake","subdivs"),&Curve2D::bake,DEFVAL(10));
ObjectTypeDB::bind_method(_MD("set_bake_interval","distance"),&Curve2D::set_bake_interval);
ObjectTypeDB::bind_method(_MD("get_bake_interval"),&Curve2D::get_bake_interval);
ObjectTypeDB::bind_method(_MD("get_baked_length"),&Curve2D::get_baked_length);
ObjectTypeDB::bind_method(_MD("interpolate_baked","offset","cubic"),&Curve2D::interpolate_baked,DEFVAL(false));
ObjectTypeDB::bind_method(_MD("get_baked_points"),&Curve2D::get_baked_points);
ObjectTypeDB::bind_method(_MD("tesselate","max_stages","tolerance_degrees"),&Curve2D::tesselate,DEFVAL(5),DEFVAL(4));
ObjectTypeDB::bind_method(_MD("_get_data"),&Curve2D::_get_data);
ObjectTypeDB::bind_method(_MD("_set_data"),&Curve2D::_set_data);
ADD_PROPERTY( PropertyInfo( Variant::REAL, "bake_interval",PROPERTY_HINT_RANGE,"0.01,512,0.01"), _SCS("set_bake_interval"),_SCS("get_bake_interval"));
ADD_PROPERTY( PropertyInfo( Variant::INT, "_data",PROPERTY_HINT_NONE,"",PROPERTY_USAGE_NOEDITOR), _SCS("_set_data"),_SCS("_get_data"));
/*ADD_PROPERTY( PropertyInfo( Variant::VECTOR3_ARRAY, "points_out"), _SCS("set_points_out"),_SCS("get_points_out"));
ADD_PROPERTY( PropertyInfo( Variant::VECTOR3_ARRAY, "points_pos"), _SCS("set_points_pos"),_SCS("get_points_pos"));
*/
}
Curve2D::Curve2D()
{
baked_cache_dirty=false;
baked_max_ofs=0;
/* add_point(Vector2(-1,0,0));
add_point(Vector2(0,2,0));
add_point(Vector2(0,3,5));*/
bake_interval=5;
}
/***********************************************************************************/
/***********************************************************************************/
/***********************************************************************************/
/***********************************************************************************/
/***********************************************************************************/
/***********************************************************************************/
int Curve3D::get_point_count() const {
return points.size();
}
void Curve3D::add_point(const Vector3& p_pos, const Vector3& p_in, const Vector3& p_out,int p_atpos) {
Point n;
n.pos=p_pos;
n.in=p_in;
n.out=p_out;
if (p_atpos>=0 && p_atpos<points.size())
points.insert(p_atpos,n);
else
points.push_back(n);
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
void Curve3D::set_point_pos(int p_index, const Vector3& p_pos) {
ERR_FAIL_INDEX(p_index,points.size());
points[p_index].pos=p_pos;
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
Vector3 Curve3D::get_point_pos(int p_index) const {
ERR_FAIL_INDEX_V(p_index,points.size(),Vector3());
return points[p_index].pos;
}
void Curve3D::set_point_tilt(int p_index, float p_tilt) {
ERR_FAIL_INDEX(p_index,points.size());
points[p_index].tilt=p_tilt;
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
float Curve3D::get_point_tilt(int p_index) const {
ERR_FAIL_INDEX_V(p_index,points.size(),0);
return points[p_index].tilt;
}
void Curve3D::set_point_in(int p_index, const Vector3& p_in) {
ERR_FAIL_INDEX(p_index,points.size());
points[p_index].in=p_in;
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
Vector3 Curve3D::get_point_in(int p_index) const {
ERR_FAIL_INDEX_V(p_index,points.size(),Vector3());
return points[p_index].in;
}
void Curve3D::set_point_out(int p_index, const Vector3& p_out) {
ERR_FAIL_INDEX(p_index,points.size());
points[p_index].out=p_out;
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
Vector3 Curve3D::get_point_out(int p_index) const {
ERR_FAIL_INDEX_V(p_index,points.size(),Vector3());
return points[p_index].out;
}
void Curve3D::remove_point(int p_index) {
ERR_FAIL_INDEX(p_index,points.size());
points.remove(p_index);
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
void Curve3D::clear_points() {
if (!points.empty()) {
points.clear();
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
}
Vector3 Curve3D::interpolate(int p_index, float p_offset) const {
int pc = points.size();
ERR_FAIL_COND_V(pc==0,Vector3());
if (p_index >= pc-1)
return points[pc-1].pos;
else if (p_index<0)
return points[0].pos;
Vector3 p0 = points[p_index].pos;
Vector3 p1 = p0+points[p_index].out;
Vector3 p3 = points[p_index+1].pos;
Vector3 p2 = p3+points[p_index+1].in;
return _bezier_interp(p_offset,p0,p1,p2,p3);
}
Vector3 Curve3D::interpolatef(real_t p_findex) const {
if (p_findex<0)
p_findex=0;
else if (p_findex>=points.size())
p_findex=points.size();
return interpolate((int)p_findex,Math::fmod(p_findex,1.0));
}
void Curve3D::_bake_segment3d(Map<float,Vector3>& r_bake, float p_begin, float p_end,const Vector3& p_a,const Vector3& p_out,const Vector3& p_b, const Vector3& p_in,int p_depth,int p_max_depth,float p_tol) const {
float mp = p_begin+(p_end-p_begin)*0.5;
Vector3 beg = _bezier_interp(p_begin,p_a,p_a+p_out,p_b+p_in,p_b);
Vector3 mid = _bezier_interp(mp,p_a,p_a+p_out,p_b+p_in,p_b);
Vector3 end = _bezier_interp(p_end,p_a,p_a+p_out,p_b+p_in,p_b);
Vector3 na = (mid-beg).normalized();
Vector3 nb = (end-mid).normalized();
float dp = na.dot(nb);
if (dp<Math::cos(Math::deg2rad(p_tol))) {
r_bake[mp]=mid;
}
if (p_depth<p_max_depth) {
_bake_segment3d(r_bake,p_begin,mp,p_a,p_out,p_b,p_in,p_depth+1,p_max_depth,p_tol);
_bake_segment3d(r_bake,mp,p_end,p_a,p_out,p_b,p_in,p_depth+1,p_max_depth,p_tol);
}
}
void Curve3D::_bake() const {
if (!baked_cache_dirty)
return;
baked_max_ofs=0;
baked_cache_dirty=false;
if (points.size()==0) {
baked_point_cache.resize(0);
baked_tilt_cache.resize(0);
return;
}
if (points.size()==1) {
baked_point_cache.resize(1);
baked_point_cache.set(0,points[0].pos);
baked_tilt_cache.resize(1);
baked_tilt_cache.set(0,points[0].tilt);
return;
}
Vector3 pos=points[0].pos;
List<Plane> pointlist;
pointlist.push_back(Plane(pos,points[0].tilt));
for(int i=0;i<points.size()-1;i++) {
float step = 0.1; // at least 10 substeps ought to be enough?
float p = 0;
while(p<1.0) {
float np=p+step;
if (np>1.0)
np=1.0;
Vector3 npp = _bezier_interp(np, points[i].pos,points[i].pos+points[i].out,points[i+1].pos+points[i+1].in,points[i+1].pos);
float d = pos.distance_to(npp);
if (d>bake_interval) {
// OK! between P and NP there _has_ to be Something, let's go searching!
int iterations = 10; //lots of detail!
float low = p;
float hi = np;
float mid = low+(hi-low)*0.5;
for(int j=0;j<iterations;j++) {
npp = _bezier_interp(mid, points[i].pos,points[i].pos+points[i].out,points[i+1].pos+points[i+1].in,points[i+1].pos);
d = pos.distance_to(npp);
if (bake_interval < d)
hi=mid;
else
low=mid;
mid = low+(hi-low)*0.5;
}
pos=npp;
p=mid;
Plane post;
post.normal=pos;
post.d=Math::lerp(points[i].tilt,points[i+1].tilt,mid);
pointlist.push_back(post);
} else {
p=np;
}
}
}
Vector3 lastpos = points[points.size()-1].pos;
float lastilt = points[points.size()-1].tilt;
float rem = pos.distance_to(lastpos);
baked_max_ofs=(pointlist.size()-1)*bake_interval+rem;
pointlist.push_back(Plane(lastpos,lastilt));
baked_point_cache.resize(pointlist.size());
Vector3Array::Write w = baked_point_cache.write();
int idx=0;
baked_tilt_cache.resize(pointlist.size());
RealArray::Write wt = baked_tilt_cache.write();
for(List<Plane>::Element *E=pointlist.front();E;E=E->next()) {
w[idx]=E->get().normal;
wt[idx]=E->get().d;
idx++;
}
}
float Curve3D::get_baked_length() const {
if (baked_cache_dirty)
_bake();
return baked_max_ofs;
}
Vector3 Curve3D::interpolate_baked(float p_offset,bool p_cubic) const{
if (baked_cache_dirty)
_bake();
//validate//
int pc = baked_point_cache.size();
if (pc==0) {
ERR_EXPLAIN("No points in Curve3D");
ERR_FAIL_COND_V(pc==0,Vector3());
}
if (pc==1)
return baked_point_cache.get(0);
int bpc=baked_point_cache.size();
Vector3Array::Read r = baked_point_cache.read();
if (p_offset<0)
return r[0];
if (p_offset>=baked_max_ofs)
return r[bpc-1];
int idx = Math::floor((double)p_offset/(double)bake_interval);
float frac = Math::fmod(p_offset,bake_interval);
if (idx>=bpc-1) {
return r[bpc-1];
} else if (idx==bpc-2) {
frac/=Math::fmod(baked_max_ofs,bake_interval);
} else {
frac/=bake_interval;
}
if (p_cubic) {
Vector3 pre = idx>0? r[idx-1] : r[idx];
Vector3 post = (idx<(bpc-2))? r[idx+2] : r[idx+1];
return r[idx].cubic_interpolate(r[idx+1],pre,post,frac);
} else {
return r[idx].linear_interpolate(r[idx+1],frac);
}
}
float Curve3D::interpolate_baked_tilt(float p_offset) const{
if (baked_cache_dirty)
_bake();
//validate//
int pc = baked_tilt_cache.size();
if (pc==0) {
ERR_EXPLAIN("No tilts in Curve3D");
ERR_FAIL_COND_V(pc==0,0);
}
if (pc==1)
return baked_tilt_cache.get(0);
int bpc=baked_tilt_cache.size();
RealArray::Read r = baked_tilt_cache.read();
if (p_offset<0)
return r[0];
if (p_offset>=baked_max_ofs)
return r[bpc-1];
int idx = Math::floor((double)p_offset/(double)bake_interval);
float frac = Math::fmod(p_offset,bake_interval);
if (idx>=bpc-1) {
return r[bpc-1];
} else if (idx==bpc-2) {
frac/=Math::fmod(baked_max_ofs,bake_interval);
} else {
frac/=bake_interval;
}
return Math::lerp(r[idx],r[idx+1],frac);
}
Vector3Array Curve3D::get_baked_points() const {
if (baked_cache_dirty)
_bake();
return baked_point_cache;
}
RealArray Curve3D::get_baked_tilts() const {
if (baked_cache_dirty)
_bake();
return baked_tilt_cache;
}
void Curve3D::set_bake_interval(float p_tolerance){
bake_interval=p_tolerance;
baked_cache_dirty=true;
emit_signal(CoreStringNames::get_singleton()->changed);
}
float Curve3D::get_bake_interval() const{
return bake_interval;
}
Dictionary Curve3D::_get_data() const {
Dictionary dc;
Vector3Array d;
d.resize(points.size()*3);
Vector3Array::Write w = d.write();
RealArray t;
t.resize(points.size());
RealArray::Write wt = t.write();
for(int i=0;i<points.size();i++) {
w[i*3+0]=points[i].in;
w[i*3+1]=points[i].out;
w[i*3+2]=points[i].pos;
wt[i]=points[i].tilt;
}
w=Vector3Array::Write();
wt=RealArray::Write();
dc["points"]=d;
dc["tilts"]=t;
return dc;
}
void Curve3D::_set_data(const Dictionary& p_data){
ERR_FAIL_COND(!p_data.has("points"));
ERR_FAIL_COND(!p_data.has("tilts"));
Vector3Array rp=p_data["points"];
int pc = rp.size();
ERR_FAIL_COND(pc%3!=0);
points.resize(pc/3);
Vector3Array::Read r = rp.read();
RealArray rtl=p_data["tilts"];
RealArray::Read rt=rtl.read();
for(int i=0;i<points.size();i++) {
points[i].in=r[i*3+0];
points[i].out=r[i*3+1];
points[i].pos=r[i*3+2];
points[i].tilt=rt[i];
}
baked_cache_dirty=true;
}
Vector3Array Curve3D::tesselate(int p_max_stages,float p_tolerance) const {
Vector3Array tess;
if (points.size()==0) {
return tess;
}
Vector< Map<float,Vector3> > midpoints;
midpoints.resize(points.size()-1);
int pc=1;
for(int i=0;i<points.size()-1;i++) {
_bake_segment3d(midpoints[i],0,1,points[i].pos,points[i].out,points[i+1].pos,points[i+1].in,0,p_max_stages,p_tolerance);
pc++;
pc+=midpoints[i].size();
}
tess.resize(pc);
Vector3Array::Write bpw=tess.write();
bpw[0]=points[0].pos;
int pidx=0;
for(int i=0;i<points.size()-1;i++) {
for(Map<float,Vector3>::Element *E=midpoints[i].front();E;E=E->next()) {
pidx++;
bpw[pidx] = E->get();
}
pidx++;
bpw[pidx] = points[i+1].pos;
}
bpw=Vector3Array::Write ();
return tess;
}
void Curve3D::_bind_methods() {
ObjectTypeDB::bind_method(_MD("get_point_count"),&Curve3D::get_point_count);
ObjectTypeDB::bind_method(_MD("add_point","pos","in","out","atpos"),&Curve3D::add_point,DEFVAL(Vector3()),DEFVAL(Vector3()),DEFVAL(-1));
ObjectTypeDB::bind_method(_MD("set_point_pos","idx","pos"),&Curve3D::set_point_pos);
ObjectTypeDB::bind_method(_MD("get_point_pos","idx"),&Curve3D::get_point_pos);
ObjectTypeDB::bind_method(_MD("set_point_tilt","idx","tilt"),&Curve3D::set_point_tilt);
ObjectTypeDB::bind_method(_MD("get_point_tilt","idx"),&Curve3D::get_point_tilt);
ObjectTypeDB::bind_method(_MD("set_point_in","idx","pos"),&Curve3D::set_point_in);
ObjectTypeDB::bind_method(_MD("get_point_in","idx"),&Curve3D::get_point_in);
ObjectTypeDB::bind_method(_MD("set_point_out","idx","pos"),&Curve3D::set_point_out);
ObjectTypeDB::bind_method(_MD("get_point_out","idx"),&Curve3D::get_point_out);
ObjectTypeDB::bind_method(_MD("remove_point","idx"),&Curve3D::remove_point);
ObjectTypeDB::bind_method(_MD("clear_points"),&Curve3D::clear_points);
ObjectTypeDB::bind_method(_MD("interpolate","idx","t"),&Curve3D::interpolate);
ObjectTypeDB::bind_method(_MD("interpolatef","fofs"),&Curve3D::interpolatef);
//ObjectTypeDB::bind_method(_MD("bake","subdivs"),&Curve3D::bake,DEFVAL(10));
ObjectTypeDB::bind_method(_MD("set_bake_interval","distance"),&Curve3D::set_bake_interval);
ObjectTypeDB::bind_method(_MD("get_bake_interval"),&Curve3D::get_bake_interval);
ObjectTypeDB::bind_method(_MD("get_baked_length"),&Curve3D::get_baked_length);
ObjectTypeDB::bind_method(_MD("interpolate_baked","offset","cubic"),&Curve3D::interpolate_baked,DEFVAL(false));
ObjectTypeDB::bind_method(_MD("get_baked_points"),&Curve3D::get_baked_points);
ObjectTypeDB::bind_method(_MD("get_baked_tilts"),&Curve3D::get_baked_tilts);
ObjectTypeDB::bind_method(_MD("tesselate","max_stages","tolerance_degrees"),&Curve3D::tesselate,DEFVAL(5),DEFVAL(4));
ObjectTypeDB::bind_method(_MD("_get_data"),&Curve3D::_get_data);
ObjectTypeDB::bind_method(_MD("_set_data"),&Curve3D::_set_data);
ADD_PROPERTY( PropertyInfo( Variant::REAL, "bake_interval",PROPERTY_HINT_RANGE,"0.01,512,0.01"), _SCS("set_bake_interval"),_SCS("get_bake_interval"));
ADD_PROPERTY( PropertyInfo( Variant::INT, "_data",PROPERTY_HINT_NONE,"",PROPERTY_USAGE_NOEDITOR), _SCS("_set_data"),_SCS("_get_data"));
/*ADD_PROPERTY( PropertyInfo( Variant::VECTOR3_ARRAY, "points_out"), _SCS("set_points_out"),_SCS("get_points_out"));
ADD_PROPERTY( PropertyInfo( Variant::VECTOR3_ARRAY, "points_pos"), _SCS("set_points_pos"),_SCS("get_points_pos"));
*/
}
Curve3D::Curve3D()
{
baked_cache_dirty=false;
baked_max_ofs=0;
/* add_point(Vector3(-1,0,0));
add_point(Vector3(0,2,0));
add_point(Vector3(0,3,5));*/
bake_interval=0.2;
}
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