double WorldObject::getAngleAtPos(RECT object)
{
dispBufUpdate();
double angle = 0;
Point2D line;
if(object.right > dispBuffObj[3].x && object.right < dispBuffObj[0].x)
{
angle = atan( (appearance.getShapeFromVert(3).y - appearance.getShapeFromVert(0).y)
/ (appearance.getShapeFromVert(0).x - appearance.getShapeFromVert(3).x));
line.x = dispBuffObj[0].x;
line.y = dispBuffObj[0].y;
if(checkLineIntersect(object, line, angle))
return -angle;
else
return 0;
}
else if(object.right > dispBuffObj[0].x && object.right < dispBuffObj[1].x)
{
return 100;
}
else if(object.left > dispBuffObj[1].x && object.left < dispBuffObj[2].x)
{
angle = atan( (appearance.getShapeFromVert(2).y - appearance.getShapeFromVert(1).y)
/ (appearance.getShapeFromVert(2).x - appearance.getShapeFromVert(1).x));
line.x = dispBuffObj[2].x;
line.y = dispBuffObj[2].y;
return angle;
}
else
return 0;
}
bool CollisionDetection::checkRectLineIntersect(Point _rp, float _width, float _height, Point _p1, Point _p2)
{
Point p1 = _rp;
Point p2 = { _rp.x + _width, _rp.y };
Point p3 = { _rp.x + _width, _rp.y + _height };
Point p4 = { _rp.x , _rp.y + _height };
if (checkLineIntersect(p1, p2, _p1, _p2))
{
return true;
}
if (checkLineIntersect(p2, p3, _p1, _p2))
{
return true;
}
if (checkLineIntersect(p3, p4, _p1, _p2))
{
return true;
}
if (checkLineIntersect(p4, p1, _p1, _p2))
{
return true;
}
return false;
}
Point CollisionDetection::getClosestRectLineIntersect(Point _rp, float _width, float _height, Point _p1, Point _p2)
{
Point p1 = _rp;
Point p2 = { _rp.x + _width, _rp.y };
Point p3 = { _rp.x + _width, _rp.y + _height };
Point p4 = { _rp.x , _rp.y + _height };
Point pp1;
Point pp2;
Point pp3;
Point pp4;
int array[2][4];
for (int i = 0; i < 4; i++)
{
array[1][i] = i;
array[0][i] = 100000;
}
if (checkLineIntersect(p1, p2, _p1, _p2))
{
pp1 = getLineIntersect(p1, p2, _p1, _p2);
array[0][0] = finddistance(_p2.x, _p2.y, pp1.x, pp1.y);
}
if (checkLineIntersect(p2, p3, _p1, _p2))
{
pp2 = getLineIntersect(p2, p3, _p1, _p2);
array[0][1] = finddistance(_p2.x, _p2.y, pp2.x, pp2.y);
}
if (checkLineIntersect(p3, p4, _p1, _p2))
{
pp3 = getLineIntersect(p3, p4, _p1, _p2);
array[0][2] = finddistance(_p2.x, _p2.y, pp3.x, pp3.y);
}
if (checkLineIntersect(p4, p1, _p1, _p2))
{
pp4 = getLineIntersect(p4, p1, _p1, _p2);
array[0][3] = finddistance(_p2.x, _p2.y, pp4.x, pp4.y);
}
int currentmin;
int currentmini;
for (int i = 0; i < 4; i++) {
currentmin = 1000000000;
currentmini = -1;
for (int j = 0; j < 4; j++) {
if (array[0][j] < currentmin) {
currentmin = array[0][j];
currentmini = j;
}
}
}
switch (currentmini)
{
case 0:
return pp1;
break;
case 1:
return pp2;
break;
case 2:
return pp3;
break;
case 3:
return pp4;
break;
}
}
