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#include "Plane.hpp"
16
17#include "Matrix.hpp"
18
19namespace sw
20{
21 Plane::Plane()
22 {
23 }
24
25 Plane::Plane(float p_A, float p_B, float p_C, float p_D)
26 {
27 A = p_A;
28 B = p_B;
29 C = p_C;
30 D = p_D;
31 }
32
33 Plane::Plane(const float ABCD[4])
34 {
35 A = ABCD[0];
36 B = ABCD[1];
37 C = ABCD[2];
38 D = ABCD[3];
39 }
40
41 Plane operator*(const Plane &p, const Matrix &T)
42 {
43 Matrix M = !T;
44
45 return Plane(p.A * M(1, 1) + p.B * M(1, 2) + p.C * M(1, 3) + p.D * M(1, 4),
46 p.A * M(2, 1) + p.B * M(2, 2) + p.C * M(2, 3) + p.D * M(2, 4),
47 p.A * M(3, 1) + p.B * M(3, 2) + p.C * M(3, 3) + p.D * M(3, 4),
48 p.A * M(4, 1) + p.B * M(4, 2) + p.C * M(4, 3) + p.D * M(4, 4));
49 }
50
51 Plane operator*(const Matrix &T, const Plane &p)
52 {
53 Matrix M = !T;
54
55 return Plane(M(1, 1) * p.A + M(2, 1) * p.B + M(3, 1) * p.C + M(4, 1) * p.D,
56 M(1, 2) * p.A + M(2, 2) * p.B + M(3, 2) * p.C + M(4, 2) * p.D,
57 M(1, 3) * p.A + M(2, 3) * p.B + M(3, 3) * p.C + M(4, 3) * p.D,
58 M(1, 4) * p.A + M(2, 4) * p.B + M(3, 4) * p.C + M(4, 4) * p.D);
59 }
60}
61