public Vector2 IntersectionWithOtherLine(InfiniteLine other)
{
Vector2 result = new Vector2();
result.x = (other.b - b) / (a - other.a);
result.y = a * result.x + b;
return(result);
}
public static CutResult CutShapeIntoTwo(Vector2 lineStart, Vector2 lineEnd, Vector2[] shape)
{
List <Vector2> firstSide = new List <Vector2>();
List <Vector2> secondSide = new List <Vector2>();
InfiniteLine cuttingLine = new InfiniteLine(lineStart, lineEnd);
int intersectionsFound = 0;
for (int i = 0; i < shape.Length; i++)
{
Vector2 point = shape[i];
Vector2 previousPoint;
if (i == 0)
{
previousPoint = shape[shape.Length - 1];
}
else
{
previousPoint = shape[i - 1];
}
if (cuttingLine.IntersectsWithSegment(previousPoint, point))
{
InfiniteLine lastTwoPointsLine = new InfiniteLine(previousPoint, point);
Vector2 intersectionPoint = cuttingLine.IntersectionWithOtherLine(lastTwoPointsLine);
firstSide.Add(intersectionPoint);
secondSide.Add(intersectionPoint);
intersectionsFound++;
}
if (cuttingLine.PointBelowLine(point))
{
firstSide.Add(point);
}
else
{
secondSide.Add(point);
}
}
if (intersectionsFound > 2)
{
//throw new System.Exception( "SpriteCutter cannot cut through non-convex shapes! Adjust your colliders shapes to be convex!" );
}
CutResult result = new CutResult();
result.firstSidePoints = firstSide.ToArray();
result.secondSidePoints = secondSide.ToArray();
return(result);
}
public static CutResult CutShapeIntoTwo( Vector2 lineStart, Vector2 lineEnd, Vector2[] shape )
{
List<Vector2> firstSide = new List<Vector2>();
List<Vector2> secondSide = new List<Vector2>();
InfiniteLine cuttingLine = new InfiniteLine( lineStart, lineEnd );
int intersectionsFound = 0;
for ( int i = 0; i < shape.Length; i++ ) {
Vector2 point = shape[ i ];
Vector2 previousPoint;
if ( i == 0 ) {
previousPoint = shape[ shape.Length - 1 ];
} else {
previousPoint = shape[ i - 1 ];
}
if ( cuttingLine.IntersectsWithSegment( previousPoint, point ) ) {
InfiniteLine lastTwoPointsLine = new InfiniteLine( previousPoint, point );
Vector2 intersectionPoint = cuttingLine.IntersectionWithOtherLine( lastTwoPointsLine );
firstSide.Add( intersectionPoint );
secondSide.Add( intersectionPoint );
intersectionsFound++;
}
if ( cuttingLine.PointBelowLine( point ) ) {
firstSide.Add( point );
} else {
secondSide.Add( point );
}
}
if ( intersectionsFound > 2 ) {
throw new System.Exception( "SpriteCutter cannot cut through non-convex shapes! Adjust your colliders shapes to be convex!" );
}
CutResult result = new CutResult();
result.firstSidePoints = firstSide.ToArray();
result.secondSidePoints = secondSide.ToArray();
return result;
}
private void OnEnable()
{
script = (InfiniteLine)target;
}
public Vector2 IntersectionWithOtherLine( InfiniteLine other )
{
Vector2 result = new Vector2();
result.x = ( other.b - b ) / ( a - other.a );
result.y = a * result.x + b;
return result;
}
