float BBFind::Rectangle::intersecting(const Rectangle &rectA, const Rectangle &rectB)
{
// Returns a ratio representing how much of the smaller
// rectangle is inside the larger rectangle.
if(!touching(rectA, rectB)) return 0.0f;
float areaA = rectA.width * rectA.height;
float areaB = rectB.width * rectB.height;
// Check if one completely contains another
if(areaA > areaB)
{
if(rectB.left() >= rectA.left() &&
rectB.right() <= rectA.right() &&
rectB.top() >= rectA.top() &&
rectB.bottom() <= rectA.bottom())
return 1.0f;
}
else
{
if(rectA.left() >= rectB.left() &&
rectA.right() <= rectB.right() &&
rectA.top() >= rectB.top() &&
rectA.bottom() <= rectB.bottom())
return 1.0f;
}
// Find intersection rectangle
int left = std::max(rectA.left(), rectB.left());
int top = std::max(rectA.top(), rectB.top());
int right = std::min(rectA.right(), rectB.right());
int bottom = std::min(rectA.bottom(), rectB.bottom());
float intersectArea = (right - left) * (bottom - top);
if(areaA > areaB) return intersectArea / areaB;
return intersectArea / areaA;
}
void AreaDxfRead::OnReadVertex(const double* s, const CVertex& v)
{
bool reverse_span = false;
if(m_curve)
{
bool is_touching = false;
if(touching(s, m_previous_end))
{
is_touching = true;
}
else if(touching(v.m_p, m_previous_end))
{
is_touching = true;
reverse_span = true;
}
// if end point touching
if(!is_touching)
{
// add curve
m_area->m_curves.push_back(*m_curve);
m_curve = NULL;
}
}
if(m_curve == NULL)
{
// start a new curve
m_curve = new CCurve();
m_curve->m_vertices.push_back(CVertex(0, s[0], s[1], 0, 0));
}
// add to curve
if(reverse_span)m_curve->m_vertices.push_back(CVertex(-v.m_type, s[0], s[1], v.m_c[0], v.m_c[1]));
else m_curve->m_vertices.push_back(v);
// remember end point
memcpy(m_previous_end, v.m_p, 2*sizeof(double));
}
void General::checkCollision(Input *input, SDL_Rect &s1Rect, SDL_Rect &e1Rect, int screenw, int screenh) {
if (touching(s1Rect, e1Rect)) {
input->setGameDone();
}
if (s1Rect.y < 0) {
s1Rect.y = 0;
}
if ((s1Rect.y + s1Rect.h) > screenh) {
s1Rect.y = screenh - s1Rect.h;
}
if (s1Rect.x < 0) {
s1Rect.x = 0;
}
if ((s1Rect.x + s1Rect.w) > screenw) {
s1Rect.x = screenw - s1Rect.w;
}
}
bool Frame::overlaps (Frame& frame)
{
return touching(current, frame.current);
}
