1 /*
2     Copyright (c) 2005-2020 Intel Corporation
3 
4     Licensed under the Apache License, Version 2.0 (the "License");
5     you may not use this file except in compliance with the License.
6     You may obtain a copy of the License at
7 
8         http://www.apache.org/licenses/LICENSE-2.0
9 
10     Unless required by applicable law or agreed to in writing, software
11     distributed under the License is distributed on an "AS IS" BASIS,
12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13     See the License for the specific language governing permissions and
14     limitations under the License.
15 */
16 
17 #ifndef UNIVERSE_H_
18 #define UNIVERSE_H_
19 
20 #ifndef UNIVERSE_WIDTH
21 #define UNIVERSE_WIDTH 1024
22 #endif
23 #ifndef UNIVERSE_HEIGHT
24 #define UNIVERSE_HEIGHT 512
25 #endif
26 
27 #include "../../common/gui/video.h"
28 #include "tbb/partitioner.h"
29 
30 class Universe {
31 public:
32     enum {
33         UniverseWidth  = UNIVERSE_WIDTH,
34         UniverseHeight = UNIVERSE_HEIGHT
35     };
36 private:
37     //in order to avoid performance degradation due to cache aliasing issue
38     //some padding is needed after each row in array, and between array themselves.
39     //the padding is achieved by adjusting number of rows and columns.
40     //as the compiler is forced to place class members of the same clause in order of the
41     //declaration this seems to be the right way of padding.
42 
43     //magic constants added below are chosen experimentally for 1024x512.
44     enum {
45         MaxWidth = UniverseWidth+1,
46         MaxHeight = UniverseHeight+3
47     };
48 
49     typedef float ValueType;
50 
51     //! Horizontal stress
52     ValueType S[MaxHeight][MaxWidth];
53 
54     //! Velocity at each grid point
55     ValueType V[MaxHeight][MaxWidth];
56 
57     //! Vertical stress
58     ValueType T[MaxHeight][MaxWidth];
59 
60     //! Coefficient related to modulus
61     ValueType M[MaxHeight][MaxWidth];
62 
63     //! Damping coefficients
64     ValueType D[MaxHeight][MaxWidth];
65 
66     //! Coefficient related to lightness
67     ValueType L[MaxHeight][MaxWidth];
68 
69     enum { ColorMapSize = 1024};
70     color_t ColorMap[4][ColorMapSize];
71 
72     enum MaterialType {
73         WATER=0,
74         SANDSTONE=1,
75         SHALE=2
76     };
77 
78     //! Values are MaterialType, cast to an unsigned char to save space.
79     unsigned char material[MaxHeight][MaxWidth];
80 
81 private:
82     enum { DamperSize = 32};
83 
84     int pulseTime;
85     int pulseCounter;
86     int pulseX;
87     int pulseY;
88 
89     drawing_memory drawingMemory;
90 
91 public:
92     void InitializeUniverse(video const& colorizer);
93 
94     void SerialUpdateUniverse();
95     void ParallelUpdateUniverse();
96     bool TryPutNewPulseSource(int x, int y);
97     void SetDrawingMemory(const drawing_memory &dmem);
98 private:
99     struct Rectangle;
100     void UpdatePulse();
101     void UpdateStress(Rectangle const& r );
102 
103     void SerialUpdateStress() ;
104     friend struct UpdateStressBody;
105     friend struct UpdateVelocityBody;
106     void ParallelUpdateStress(tbb::affinity_partitioner &affinity);
107 
108     void UpdateVelocity(Rectangle const& r);
109 
110     void SerialUpdateVelocity() ;
111     void ParallelUpdateVelocity(tbb::affinity_partitioner &affinity);
112 };
113 
114 #endif /* UNIVERSE_H_ */
115