AniGeometryUtils.cpp
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//
// AniGeometryUtils.cpp
// SteveMaggieCpp
//
// Created by Katarzyna Kalinowska-Górska on 20.05.2017.
//
//
#include <stdio.h>
#include "AniGeometryUtils.h"
//TODO: use original scale doesn't seem to work
cocos2d::Rect AniGeometryUtils::getBoundingBoxToWorld(cocos2d::Node* node, bool ignoreTransformations)
{
auto tempScale = node->getScaleX() != node->getScaleY() ? node->getScaleX() : node->getScale();
auto tempRotation = node->getRotation();
if(ignoreTransformations){
node->setScale(1);
node->setRotation(0);
}
auto bb = node->getBoundingBox();
bb.origin = cocos2d::Point(0,0);
if(ignoreTransformations){
node->setScale(tempScale);
node->setRotation(tempRotation);
}
auto bbToWorld = cocos2d::RectApplyTransform(bb, node->getNodeToWorldTransform());
// if(ignoreTransformations){
// node->setScale(tempScale);
// node->setRotation(tempRotation);
// }
return bbToWorld;
}
void AniGeometryUtils::flipChildX(cocos2d::Node* flippedParent, cocos2d::Node* child){
auto childDFromCenter = flippedParent->getBoundingBox().size.width/2 - child->getPositionX();
child->setPositionX(flippedParent->getBoundingBox().size.width/2 + childDFromCenter);
}
cocos2d::Rect AniGeometryUtils::flippedXRect(cocos2d::Node* flippedParent, cocos2d::Rect rect){
auto rectMidDFromCenter = flippedParent->getBoundingBox().size.width/2 - rect.getMidX();
auto anchorPointcorrection = /*rectMidDFromCenter > 0 ? rect.size.width/2 :*/ -rect.size.width/2;
auto newRect = rect;
newRect.origin.x = flippedParent->getBoundingBox().size.width/2 + rectMidDFromCenter + anchorPointcorrection;
return newRect;
}
cocos2d::Point AniGeometryUtils::flippedXPoint(cocos2d::Node* flippedParent, cocos2d::Point point){
auto dxFromCenter = flippedParent->getBoundingBox().size.width/2 - point.x;
return cocos2d::Point(flippedParent->getBoundingBox().size.width/2 + dxFromCenter, point.y);
}
cocos2d::Rect AniGeometryUtils::getBoundingBoxToWorldForSubrect(cocos2d::Node* node, cocos2d::Rect subrect){
auto subrectToWorld = AniGeometryUtils::getBoundingBoxToWorld(node);
subrectToWorld.origin.y += subrect.origin.y;
subrectToWorld.size.height = subrect.size.height;
subrectToWorld.origin.x += subrect.origin.x;
subrectToWorld.size.width = subrect.size.width;
return subrectToWorld;
}
cocos2d::Rect AniGeometryUtils::getRectIntersection(cocos2d::Rect rect1, cocos2d::Rect rect2)
{
auto intersection = cocos2d::Rect(MAX(rect1.origin.x, rect2.origin.x), MAX(rect1.origin.y, rect2.origin.y), 0, 0);
intersection.size.width = MIN(rect1.origin.x + rect1.size.width, rect2.origin.x + rect2.size.width) - intersection.origin.x;
intersection.size.height = MIN(rect1.origin.y + rect1.size.height, rect2.origin.y + rect2.size.height) - intersection.origin.y;
return intersection;
}
bool AniGeometryUtils::segmentIntersectsRect(cocos2d::Rect rect, cocos2d::Point lineP1, cocos2d::Point lineP2)
{
if(rect.containsPoint(lineP1) || rect.containsPoint(lineP2)){
return true;
}
auto rectX2 = rect.origin.x + rect.size.width;
auto rectY2 = rect.origin.y + rect.size.height;
if((lineP1.x > rectX2 && lineP2.x > rectX2) || (lineP1.x < rect.origin.x && lineP2.x < rect.origin.x) || (lineP1.y > rectY2 && lineP2.y > rectY2) || (lineP1.y < rect.origin.y && lineP2.y < rect.origin.y)){
return false;
}
if(lineP1.y == lineP2.y){
return true;
}
if(lineP1.x == lineP2.x){
return true;
}
auto lineA = (lineP1.y - lineP2.y)/(lineP1.x - lineP2.x);
auto lineB = lineP1.y - lineP1.x * lineA;
auto yr1 = rect.origin.x*lineA + lineB;
auto yr2 = (rect.origin.x+rect.size.width)*lineA + lineB;
auto xr1 = (rect.origin.y - lineB)/lineA;
auto xr2 = (rect.origin.y+rect.size.height - lineB)/lineA;
return (yr1 >= rect.origin.y && yr1 <= rectY2) || (yr2 >= rect.origin.y && yr2 <= rectY2) || (xr1 >= rect.origin.x && xr1 <= rectX2) || (xr2 >= rect.origin.x && xr2 <= rectX2);
}
cocos2d::Point AniGeometryUtils::addPoints(std::vector<cocos2d::Point> points)
{
float sumX = 0, sumY = 0;
for(int i = 0; i < points.size(); ++i){
sumX += points[i].x;
sumY += points[i].y;
}
return cocos2d::Point(sumX, sumY);
}
void AniGeometryUtils::getLineABCFromPoints(cocos2d::Point pointA, cocos2d::Point pointB, float (&line)[3])
{
auto A = pointA.y - pointB.y;
auto B = pointB.x - pointA.x;
auto C = pointA.x * pointB.y - pointB.x * pointA.y;
line[0] = A;
line[1] = B;
line[2] = C;
}
bool AniGeometryUtils::segmentCrossesLine(cocos2d::Point sPointA, cocos2d::Point sPointB, float lineA, float lineB, float lineC)
{
auto valueA = lineA * sPointA.x + lineB * sPointA.y + lineC;
auto valueB = lineA * sPointB.x + lineB * sPointB.y + lineC;
if(valueA * valueB <= 0){
return true;
}
return false;
}
float AniGeometryUtils::calculateIntersectionPercentage(cocos2d::Rect rect1, cocos2d::Rect rect2, int percentageOfWhichRect)
{
if(rect1.size.width == 0 || rect1.size.height == 0 || rect2.size.width == 0 || rect2.size.height == 0){
return 0;
}
if(!rect1.intersectsRect(rect2)){
return 0;
}
auto intersection = AniGeometryUtils::getRectIntersection(rect1, rect2);
auto r = percentageOfWhichRect == 0 ? rect1 : rect2;
return intersection.size.width * intersection.size.height / (r.size.width * r.size.height);
}
/*
// relatively to line y = 0
lineAngle : function(lineP1, lineP2){
if(lineP1.x == lineP2.x){
return 0;
} else if(lineP1.y == lineP2.y){
return Math.PI/2;
}
// build a triangle, with third point equal to (x1, y2), and get the arc sin of (p3,p2)/(p1,p2)
let point3 = new cc.p(lineP1.x, lineP2.y);
let angle = Math.asin(cc.pDistance(lineP2, point3)/cc.pDistance(lineP1, lineP2));
// add a multiple of PI/2, depending on the quarter
if(lineP2.y < lineP1.y){
if(lineP2.x > lineP1.x){
angle = Math.PI - angle;
} else {
angle = Math.PI + angle;
}
} else if(lineP2.x < lineP1.x){
angle = Math.PI*2 - angle;
}
return angle;
}
};
*/