1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //    http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef Plane_hpp
16 #define Plane_hpp
17 
18 #include "Vector.hpp"
19 
20 namespace sw
21 {
22 	struct Matrix;
23 
24 	struct Plane
25 	{
26 		float A;
27 		float B;
28 		float C;
29 		float D;
30 
31 		Plane();
32 		Plane(float A, float B, float C, float D);   // Plane equation
33 		Plane(const float ABCD[4]);
34 
35 		friend Plane operator*(const Plane &p, const Matrix &A);   // Transform plane by matrix (post-multiply)
36 		friend Plane operator*(const Matrix &A, const Plane &p);   // Transform plane by matrix (pre-multiply)
37 	};
38 }
39 
40 #endif   // Plane_hpp
41