X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fyoink;a=blobdiff_plain;f=src%2FMoof%2FPlane.hh;h=248a3128161afe0cadbdde10fa781d6b3e89c405;hp=797edc05c39fe13283c4a52088502fcb6e2f132c;hb=72d4af22710317acffab861421c4364b1780b6fe;hpb=493ddb59a8620b49dfa0ff62ce93395ebfd02e86

diff --git a/src/Moof/Plane.hh b/src/Moof/Plane.hh
index 797edc0..248a312 100644
--- a/src/Moof/Plane.hh
+++ b/src/Moof/Plane.hh
@@ -35,11 +35,55 @@
 namespace Mf {
 
 
-class Plane
+class Aabb;
+class Sphere;
+
+
+struct Plane
 {
-	Vector4 components;
+	Vector3	normal;
+	Scalar	d;
+
+	typedef enum
+	{
+		NEGATIVE	= -1,
+		INTERSECT	=  0,
+		POSITIVE	=  1
+	} Halfspace;
+
+	Plane() {}
+	Plane(const Vector3& vector, Scalar scalar) :
+		normal(vector),
+		d(scalar) {}
+	Plane(Scalar a, Scalar b, Scalar c, Scalar scalar) :
+		normal(a, b, c),
+		d(scalar) {}
+
+
+	void normalize()
+	{
+		Scalar mag = normal.length();
+
+		normal /= mag;
+		d /= mag;
+	}
+
+	inline Scalar getDistanceToPoint(const Vector3& point) const
+	{
+		return cml::dot(point, normal) + d;
+	}
+
+	inline Halfspace intersectsPoint(const Vector3& point) const
+	{
+		Scalar distance = getDistanceToPoint(point);
+
+		if (isEqual(distance, 0.0)) return INTERSECT;
+		else if (distance < 0.0)    return NEGATIVE;
+		else                        return POSITIVE;
+	}
 
-public:
+	Halfspace intersectsAabb(const Aabb& aabb) const;
+	Halfspace intersectsSphere(const Sphere& sphere) const;
 };