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-rw-r--r--core/math/aabb.cpp418
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diff --git a/core/math/aabb.cpp b/core/math/aabb.cpp
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--- a/core/math/aabb.cpp
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-/*************************************************************************/
-/* aabb.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 "aabb.h"
-
-#include "print_string.h"
-
-float Rect3::get_area() const {
-
- return size.x*size.y*size.z;
-
-}
-
-bool Rect3::operator==(const Rect3& p_rval) const {
-
- return ((pos==p_rval.pos) && (size==p_rval.size));
-
-}
-bool Rect3::operator!=(const Rect3& p_rval) const {
-
- return ((pos!=p_rval.pos) || (size!=p_rval.size));
-
-}
-
-void Rect3::merge_with(const Rect3& p_aabb) {
-
- Vector3 beg_1,beg_2;
- Vector3 end_1,end_2;
- Vector3 min,max;
-
- beg_1=pos;
- beg_2=p_aabb.pos;
- end_1=Vector3(size.x,size.y,size.z)+beg_1;
- end_2=Vector3(p_aabb.size.x,p_aabb.size.y,p_aabb.size.z)+beg_2;
-
- min.x=(beg_1.x<beg_2.x)?beg_1.x:beg_2.x;
- min.y=(beg_1.y<beg_2.y)?beg_1.y:beg_2.y;
- min.z=(beg_1.z<beg_2.z)?beg_1.z:beg_2.z;
-
- max.x=(end_1.x>end_2.x)?end_1.x:end_2.x;
- max.y=(end_1.y>end_2.y)?end_1.y:end_2.y;
- max.z=(end_1.z>end_2.z)?end_1.z:end_2.z;
-
- pos=min;
- size=max-min;
-}
-
-Rect3 Rect3::intersection(const Rect3& p_aabb) const {
-
- Vector3 src_min=pos;
- Vector3 src_max=pos+size;
- Vector3 dst_min=p_aabb.pos;
- Vector3 dst_max=p_aabb.pos+p_aabb.size;
-
- Vector3 min,max;
-
- if (src_min.x > dst_max.x || src_max.x < dst_min.x )
- return Rect3();
- else {
-
- min.x= ( src_min.x > dst_min.x ) ? src_min.x :dst_min.x;
- max.x= ( src_max.x < dst_max.x ) ? src_max.x :dst_max.x;
-
- }
-
- if (src_min.y > dst_max.y || src_max.y < dst_min.y )
- return Rect3();
- else {
-
- min.y= ( src_min.y > dst_min.y ) ? src_min.y :dst_min.y;
- max.y= ( src_max.y < dst_max.y ) ? src_max.y :dst_max.y;
-
- }
-
- if (src_min.z > dst_max.z || src_max.z < dst_min.z )
- return Rect3();
- else {
-
- min.z= ( src_min.z > dst_min.z ) ? src_min.z :dst_min.z;
- max.z= ( src_max.z < dst_max.z ) ? src_max.z :dst_max.z;
-
- }
-
-
- return Rect3( min, max-min );
-}
-
-bool Rect3::intersects_ray(const Vector3& p_from, const Vector3& p_dir,Vector3* r_clip,Vector3* r_normal) const {
-
- Vector3 c1, c2;
- Vector3 end = pos+size;
- float near=-1e20;
- float far=1e20;
- int axis=0;
-
- for (int i=0;i<3;i++){
- if (p_dir[i] == 0){
- if ((p_from[i] < pos[i]) || (p_from[i] > end[i])) {
- return false;
- }
- } else { // ray not parallel to planes in this direction
- c1[i] = (pos[i] - p_from[i]) / p_dir[i];
- c2[i] = (end[i] - p_from[i]) / p_dir[i];
-
- if(c1[i] > c2[i]){
- SWAP(c1,c2);
- }
- if (c1[i] > near){
- near = c1[i];
- axis=i;
- }
- if (c2[i] < far){
- far = c2[i];
- }
- if( (near > far) || (far < 0) ){
- return false;
- }
- }
- }
-
- if (r_clip)
- *r_clip=c1;
- if (r_normal) {
- *r_normal=Vector3();
- (*r_normal)[axis]=p_dir[axis]?-1:1;
- }
-
- return true;
-
-}
-
-
-bool Rect3::intersects_segment(const Vector3& p_from, const Vector3& p_to,Vector3* r_clip,Vector3* r_normal) const {
-
- real_t min=0,max=1;
- int axis=0;
- float sign=0;
-
- for(int i=0;i<3;i++) {
- real_t seg_from=p_from[i];
- real_t seg_to=p_to[i];
- real_t box_begin=pos[i];
- real_t box_end=box_begin+size[i];
- real_t cmin,cmax;
- float csign;
-
- if (seg_from < seg_to) {
-
- if (seg_from > box_end || seg_to < box_begin)
- return false;
- real_t length=seg_to-seg_from;
- cmin = (seg_from < box_begin)?((box_begin - seg_from)/length):0;
- cmax = (seg_to > box_end)?((box_end - seg_from)/length):1;
- csign=-1.0;
-
- } else {
-
- if (seg_to > box_end || seg_from < box_begin)
- return false;
- real_t length=seg_to-seg_from;
- cmin = (seg_from > box_end)?(box_end - seg_from)/length:0;
- cmax = (seg_to < box_begin)?(box_begin - seg_from)/length:1;
- csign=1.0;
- }
-
- if (cmin > min) {
- min = cmin;
- axis=i;
- sign=csign;
- }
- if (cmax < max)
- max = cmax;
- if (max < min)
- return false;
- }
-
-
- Vector3 rel=p_to-p_from;
-
- if (r_normal) {
- Vector3 normal;
- normal[axis]=sign;
- *r_normal=normal;
- }
-
- if (r_clip)
- *r_clip=p_from+rel*min;
-
- return true;
-
-}
-
-
-bool Rect3::intersects_plane(const Plane &p_plane) const {
-
- Vector3 points[8] = {
- Vector3( pos.x , pos.y , pos.z ),
- Vector3( pos.x , pos.y , pos.z+size.z ),
- Vector3( pos.x , pos.y+size.y , pos.z ),
- Vector3( pos.x , pos.y+size.y , pos.z+size.z ),
- Vector3( pos.x+size.x , pos.y , pos.z ),
- Vector3( pos.x+size.x , pos.y , pos.z+size.z ),
- Vector3( pos.x+size.x , pos.y+size.y , pos.z ),
- Vector3( pos.x+size.x , pos.y+size.y , pos.z+size.z ),
- };
-
- bool over=false;
- bool under=false;
-
- for (int i=0;i<8;i++) {
-
- if (p_plane.distance_to(points[i])>0)
- over=true;
- else
- under=true;
-
- }
-
- return under && over;
-}
-
-
-
-Vector3 Rect3::get_longest_axis() const {
-
- Vector3 axis(1,0,0);
- real_t max_size=size.x;
-
- if (size.y > max_size ) {
- axis=Vector3(0,1,0);
- max_size=size.y;
- }
-
- if (size.z > max_size ) {
- axis=Vector3(0,0,1);
- max_size=size.z;
- }
-
- return axis;
-}
-int Rect3::get_longest_axis_index() const {
-
- int axis=0;
- real_t max_size=size.x;
-
- if (size.y > max_size ) {
- axis=1;
- max_size=size.y;
- }
-
- if (size.z > max_size ) {
- axis=2;
- max_size=size.z;
- }
-
- return axis;
-}
-
-
-Vector3 Rect3::get_shortest_axis() const {
-
- Vector3 axis(1,0,0);
- real_t max_size=size.x;
-
- if (size.y < max_size ) {
- axis=Vector3(0,1,0);
- max_size=size.y;
- }
-
- if (size.z < max_size ) {
- axis=Vector3(0,0,1);
- max_size=size.z;
- }
-
- return axis;
-}
-int Rect3::get_shortest_axis_index() const {
-
- int axis=0;
- real_t max_size=size.x;
-
- if (size.y < max_size ) {
- axis=1;
- max_size=size.y;
- }
-
- if (size.z < max_size ) {
- axis=2;
- max_size=size.z;
- }
-
- return axis;
-}
-
-Rect3 Rect3::merge(const Rect3& p_with) const {
-
- Rect3 aabb=*this;
- aabb.merge_with(p_with);
- return aabb;
-}
-Rect3 Rect3::expand(const Vector3& p_vector) const {
- Rect3 aabb=*this;
- aabb.expand_to(p_vector);
- return aabb;
-
-}
-Rect3 Rect3::grow(real_t p_by) const {
-
- Rect3 aabb=*this;
- aabb.grow_by(p_by);
- return aabb;
-}
-
-void Rect3::get_edge(int p_edge,Vector3& r_from,Vector3& r_to) const {
-
- ERR_FAIL_INDEX(p_edge,12);
- switch(p_edge) {
-
- case 0:{
-
- r_from=Vector3( pos.x+size.x , pos.y , pos.z );
- r_to=Vector3( pos.x , pos.y , pos.z );
- } break;
- case 1:{
-
- r_from=Vector3( pos.x+size.x , pos.y , pos.z+size.z );
- r_to=Vector3( pos.x+size.x , pos.y , pos.z );
- } break;
- case 2:{
- r_from=Vector3( pos.x , pos.y , pos.z+size.z );
- r_to=Vector3( pos.x+size.x , pos.y , pos.z+size.z );
-
- } break;
- case 3:{
-
- r_from=Vector3( pos.x , pos.y , pos.z );
- r_to=Vector3( pos.x , pos.y , pos.z+size.z );
-
- } break;
- case 4:{
-
- r_from=Vector3( pos.x , pos.y+size.y , pos.z );
- r_to=Vector3( pos.x+size.x , pos.y+size.y , pos.z );
- } break;
- case 5:{
-
- r_from=Vector3( pos.x+size.x , pos.y+size.y , pos.z );
- r_to=Vector3( pos.x+size.x , pos.y+size.y , pos.z+size.z );
- } break;
- case 6:{
- r_from=Vector3( pos.x+size.x , pos.y+size.y , pos.z+size.z );
- r_to=Vector3( pos.x , pos.y+size.y , pos.z+size.z );
-
- } break;
- case 7:{
-
- r_from=Vector3( pos.x , pos.y+size.y , pos.z+size.z );
- r_to=Vector3( pos.x , pos.y+size.y , pos.z );
-
- } break;
- case 8:{
-
- r_from=Vector3( pos.x , pos.y , pos.z+size.z );
- r_to=Vector3( pos.x , pos.y+size.y , pos.z+size.z );
-
- } break;
- case 9:{
-
- r_from=Vector3( pos.x , pos.y , pos.z );
- r_to=Vector3( pos.x , pos.y+size.y , pos.z );
-
- } break;
- case 10:{
-
- r_from=Vector3( pos.x+size.x , pos.y , pos.z );
- r_to=Vector3( pos.x+size.x , pos.y+size.y , pos.z );
-
- } break;
- case 11:{
-
- r_from=Vector3( pos.x+size.x , pos.y , pos.z+size.z );
- r_to=Vector3( pos.x+size.x , pos.y+size.y , pos.z+size.z );
-
- } break;
-
- }
-
-}
-
-Rect3::operator String() const {
-
- return String()+pos +" - "+ size;
-}
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