public static bool IsCircleInsectCircle2(Vector2 center1, float r1, Vector2 center2, float r2, ref GeoInsectPointArrayInfo insect)
{
// MatrixUtils
Vector2 cc1 = center2 - center1;
float cc1d = cc1.magnitude;
if (cc1d > (r1 + r2))
{
return(false);
}
if (r1 > r2 && IsInCircle(center1, r1, center2)) // 内部
{
if (r1 > (r2 + cc1d))
{
return(false);
}
}
if (r1 < r2 && IsInCircle(center2, r2, center1))
{
if (r2 > (r1 + cc1d))
{
return(false);
}
}
Vector2 cc = center1 + cc1 * 0.5f;
if (cc1d == (r1 + r2))
{
insect.mIsIntersect = true;
insect.mHitGlobalPoint.mPointArray.Add(new Vector3(cc.x, cc.y, 0.0f));
return(true);
}
float dist = cc1.sqrMagnitude * 0.25f;
cc1.Normalize();
Vector2 v1, v2;
MatrixUtils.CreateMatrix2D(90, out v1, out v2);
float x = Vector2.Dot(v1, cc1);
float y = Vector2.Dot(v2, cc1);
Vector2 vertD = new Vector2(x, y);
vertD.Normalize();
float len = Mathf.Sqrt(r1 * r1 - dist);
Vector2 p1 = cc + len * vertD;
Vector2 p2 = cc - len * vertD;
insect.mIsIntersect = true;
insect.mHitGlobalPoint.mPointArray.Add(new Vector3(p1.x, p1.y, 0.0f));
insect.mHitGlobalPoint.mPointArray.Add(new Vector3(p2.x, p2.y, 0.0f));
return(false);
}
public static List <Vector2> CalculateCircle(float angle, float r, Vector2 center)
{
List <Vector2> cir = new List <Vector2>();
Matrix2x2 mat2 = MatrixUtils.CreateMatrix2D(angle, center);
mat2.Scale = Vector2.one * r;
Vector2 start = new Vector2(0, 1);
int count = (int)(360.0f / angle);
for (int i = 0; i < count; ++i)
{
Vector2 next = mat2.Rotate(start);
start = next.normalized;
cir.Add(start * r + center);
}
return(cir);
}
