double Line::calcY(Point p) {
if (doubleEquals(b,0)) {
return p.y;
} else {
return (-c - a*p.x)/b;
}
}
void BytecodeTranslatorVisitor::visitDoubleLiteralNode(DoubleLiteralNode* node) {
onVisitNode(node);
const double value = node->literal();
if (doubleEquals(value, -1.0))
EMIT(BC_DLOADM1);
else if (doubleEquals(value, 0.0))
EMIT(BC_DLOAD0);
else if (doubleEquals(value, 1.0))
EMIT(BC_DLOAD1);
else {
EMIT(BC_DLOAD);
EMIT_DOUBLE(value);
}
pushType(VT_DOUBLE);
}
//http://community.topcoder.com/tc?module=Static&d1=tutorials&d2=geometry2
Point Line::getIntersect(Line that) {
double det = this->a*that.b - that.a*this->b;
if (doubleEquals(det,0)) {
return Point(0,0); // Should use isIntersect to find this is invalid.
} else {
return Point((this->b*that.c - that.b*this->c)/det,
(that.a*this->c-this->a*that.c)/det);
}
}
bool Line::containsPoint(Point p) {
return doubleEquals(this->a*p.x + this->b*p.y, -this->c);
}
bool Line::isIntersect(Line that) {
return !doubleEquals(this->a*that.b - that.a *this->b,0);
}
double Line::getAcuteAngleToYAxis() {
if (doubleEquals(b,0)) {
return 0;
}
return atan(-this->a/this->b);
}
