diff --git a/.vs/3dMath/v15/.suo b/.vs/3dMath/v15/.suo
index c81a293..ba30555 100644
Binary files a/.vs/3dMath/v15/.suo and b/.vs/3dMath/v15/.suo differ
diff --git a/GMath.cpp b/GMath.cpp
index e8f164f..7d09e3a 100644
--- a/GMath.cpp
+++ b/GMath.cpp
@@ -1039,3 +1039,26 @@ float Det(const GMatrix & m)
 	return ret;
 }
 
+GLine::GLine(const GPoint3 & _p, const GVector3 & _v)
+{
+	p = _p;
+	v = _v;
+}
+
+GLine::GLine(const GLine & copy)
+{
+	p = copy.p;
+	v = copy.v;
+}
+
+GLine & GLine::operator=(const GLine & rhs)
+{
+	p = rhs.p;
+	v = rhs.v;
+	return *this;
+}
+
+GPoint3 GLine::operator()(const float t) const
+{
+	return p + v*t;
+}
diff --git a/GMath.h b/GMath.h
index f18bfa5..9dc7475 100644
--- a/GMath.h
+++ b/GMath.h
@@ -18,6 +18,11 @@
 
 using namespace std;
 
+class GVector3;
+class GVector;
+class GMatrix;
+typedef GVector3 GPoint3;
+
 class GVector3 {
 private:
 	float v[3];
@@ -74,7 +79,6 @@ public:
 	const float operator [](const int& idx) const;//下标获取分量
 };
 
-class GMatrix;
 class GVector {
 public:
 	//GVector 1~2
@@ -192,11 +196,24 @@ public:
 	friend int Rank(const GMatrix& m);//获取矩阵的秩
 	friend int Nullity(const GMatrix& m);//获取矩阵的零化度
 
-	friend GMatrix Mij(const GMatrix& m, int r, int c); //计算余子式
+	friend GMatrix Mij(const GMatrix& m, int r, int c); //计算余子式矩阵
 	friend float Det(const GMatrix& m);
 
 private:
 	int r;
 	int c;
 	float *m;
+};
+
+class GLine {
+private:
+	// l(t) = p + t*v;
+	GPoint3 p;//端点
+	GVector3 v;//方向
+public:
+	GLine(const GPoint3& _p = GPoint3(0.0f, 0.0f, 0.0f), const GVector3& _v = GVector3(0.0f, 0.0f, 0.0f));
+	GLine(const GLine& copy);
+
+	GLine& operator =(const GLine& rhs);
+	GPoint3 operator ()(const float t) const;
 };
\ No newline at end of file
diff --git a/main.cpp b/main.cpp
index 4c5d295..720e3a7 100644
--- a/main.cpp
+++ b/main.cpp
@@ -2,16 +2,10 @@
 
 int main() {
 
-	float f1[] = { 
-		1.0f, 4.0f, -8.0,
-		0.0f, 2.0f, 9.0,
-		0.0f, 6.0f, 1.0f
-	};
-
-	GMatrix M1(3,3, f1);
-	cout << M1 << endl;
-
-	cout << Det(M1) << endl;
+	GLine l(GPoint3(0.0f, 0.0f, 0.0f), GVector3(1.0, 0.0f, 0.0f));
 	
+	GPoint3 p = l(2.0f);
+
+	cout << p << endl;
 	return 0;
 }
\ No newline at end of file