增加扫描线光栅算法

source/core/include/math/dvc_fix_point.h

@@ -415,6 +415,7 @@ struct iFloat2
 	iFloat2() : x(0), y(0) {}
 	iFloat2(const iFloat2& other) : x(other.x), y(other.y) {}
 	iFloat2(float32_t _x, float32_t _y) : x(_x), y(_y) {}
+	iFloat2(iFloat _x, iFloat _y) : x(_x), y(_y) {}
 };
 
 struct iFloat3

source/core/include/pipe/dvc_rasterizer.h

@@ -42,8 +42,8 @@ public:
 
 	//Scaleline algorithm
 	static void drawTriangleScanline(int32_t canvasWidth, int32_t canvasHeight,
-		const fVector3& v0, const fVector3& v1, const fVector3& v2,
-		DrawTriangleCallback callback);
+		const fVector2& v0, const fVector2& v1, const fVector2& v2,
+		DrawTriangleCallback callback, bool ccw = true);
 };
 
 DV_CORE_END_NAMESPACE