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1 #include "level.h"
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2
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3 #include "opt.h"
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4
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5 Level::Level()
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6 {
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7 terrain = 0;
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8 }
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9
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10 Level::~Level()
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11 {
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12 delete terrain;
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13 }
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14
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15 static float terrain_func(float x, float y, float z)
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16 {
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17 float nx = (x * 2.0 - 1.0) * 0.9;
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18 float ny = (y * 2.0 - 1.0) * 0.9;
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19 float valley = nx * nx + ny * ny;
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20
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21 float s = opt.gen_noise_scale;
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22 float noise = 0.2 * fbm2(x * s, y * s, 3) * (valley + 0.25);
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23 float grad = 0.75 - z + noise + valley * 0.4;
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24
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25 return grad;
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26 }
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27
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28 void Level::generate()
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29 {
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30 delete terrain;
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31
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32 int xsz = opt.world_size[0];
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33 int ysz = opt.world_size[1];
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34 int zsz = opt.world_size[2];
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35
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36 terrain = new Volume(xsz, ysz, zsz);
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37
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38 for(int i=0; i<xsz; i++) {
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39 for(int j=0; j<ysz; j++) {
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40 float x = (float)i / (float)xsz;
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41 float y = (float)j / (float)ysz;
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42 //float peak = 0.4 * noise2(x, y) * 0.5 + 0.5;
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43
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44 for(int k=0; k<zsz; k++) {
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45 Vector4 voxel(1, 1, 1, 1);
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46 float z = (float)k / (float)zsz;
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47
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48 float alpha = terrain_func(x, y, z);
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49
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50 if(z < 0.1) {
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51 // lava
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52 static const Vector4 col1(0.96, 0.3, 0.1, 1);
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53 static const Vector4 col2(0.96, 0.75, 0.1, 1);
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54 float t = noise3(x, y, z) * 0.5 + 0.5;
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55 voxel = lerp(col1, col2, t);
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56 } else if(z < 0.8) {
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57 if(alpha < 0.56) {
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58 // grass
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59 voxel = Vector4(0.68, 0.95, 0.38);
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60 } else {
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61 // mud
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62 voxel = Vector4(0.57, 0.43, 0.29, 1);
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63 }
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64 } // else snow (default)
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65
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66 voxel.w = alpha;
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67 terrain->set_voxel(i, j, k, voxel);
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68 }
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69 }
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70 }
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71 }
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72
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73 bool Level::load(const char *fname)
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74 {
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75 return false;
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76 }
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77
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78 bool Level::save(const char *fname) const
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79 {
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80 return false;
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81 }
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