nextstep.c 6.43 KB
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 Cassio Kirch committed Oct 22, 2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 ``````#include #include #include #include #include #include "define.h" #include "boid.h" #include "box.h" #include "distance.h" #include "nextstep.h" void checkLimits (struct Boid* const boid) { while (boid -> position[X] < -(RANGE / 2.0)) boid -> position[X] += RANGE; while (boid -> position[X] > (RANGE / 2.0)) boid -> position[X] -= RANGE; while (boid -> position[Y] < -(RANGE / 2.0)) boid -> position[Y] += RANGE; while (boid -> position[Y] > (RANGE / 2.0)) boid -> position[Y] -= RANGE; } void makeSum (struct Boid* const boid, const struct Boid* conductor, \ double* const sumFX, double* const sumFY, \ double* const sumVX, double* const sumVY) { struct Distance distance; double force; while (conductor != NULL) { if (boid != conductor) { distance = getDistance (boid, conductor); if (distance.module < NEIGHBOR_DISTANCE) { boid -> neighbors++; force = getForce (distance.module); if (conductor -> type == ENDODERM && \ boid -> type == ENDODERM) { *sumFX += BETA11 * force * distance.cosine; *sumFY += BETA11 * force * distance.sine; *sumVX += ALPHA11 * conductor -> velocity[X] / V0; *sumVY += ALPHA11 * conductor -> velocity[Y] / V0; } else if (conductor -> type == ECTODERM && \ boid -> type == ECTODERM) { *sumFX += BETA22 * force * distance.cosine; *sumFY += BETA22 * force * distance.sine; *sumVX += ALPHA22 * conductor -> velocity[X] / V0; *sumVY += ALPHA22 * conductor -> velocity[Y] / V0; } else { *sumFX += BETA12 * force * distance.cosine; *sumFY += BETA12 * force * distance.sine; *sumVX += ALPHA12 * conductor -> velocity[X] / V0; *sumVY += ALPHA12 * conductor -> velocity[Y] / V0; if (conductor -> type == ECTODERM) /* And boid->type==ENDO */ boid -> ectoNeighbors++; } } } conductor = conductor -> next; } `````` Cassio Kirch committed Oct 23, 2015 74 75 76 `````` if(boid -> neighbors != 0u) boid -> gamma = (double)boid -> ectoNeighbors / boid -> neighbors; else `````` Cassio Kirch committed Oct 23, 2015 77 `````` boid -> gamma = 1000000.0; `````` Cassio Kirch committed Oct 22, 2015 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 ``````} void setNextVelocity (struct Boid* const boid, const struct Box box[]) { double sumVX = 0.0, sumVY = 0.0; /* For alpha and velocity sum. */ double uAngle, uX, uY; /* For nu and random things. */ double sumFX = 0.0, sumFY = 0.0; /* For beta and force sum. */ double sum, sumX, sumY; struct Boid *conductor; boid -> neighbors = 0; boid -> ectoNeighbors = 0; boid -> gamma = 0.0; /* check neighbors in the same box */ conductor = box[boid -> boxID].first; makeSum(boid, conductor, &sumFX, &sumFY, &sumVX, &sumVY); /* check neighbors in the north box */ conductor = box[getNorthBoxID (boid -> boxID)].first; makeSum(boid, conductor, &sumFX, &sumFY, &sumVX, &sumVY); /* check neighbors in the south box */ conductor = box[getSouthBoxID (boid -> boxID)].first; makeSum(boid, conductor, &sumFX, &sumFY, &sumVX, &sumVY); /* check neighbors in the west box */ conductor = box[getWestBoxID (boid -> boxID)].first; makeSum(boid, conductor, &sumFX, &sumFY, &sumVX, &sumVY); /* check neighbors in the east box */ conductor = box[getEastBoxID (boid -> boxID)].first; makeSum(boid, conductor, &sumFX, &sumFY, &sumVX, &sumVY); /* check neighbors in the northeast box */ conductor = box[getEastBoxID (getNorthBoxID (boid -> boxID))].first; makeSum(boid, conductor, &sumFX, &sumFY, &sumVX, &sumVY); /* check neighbors in the southeast box */ conductor = box[getEastBoxID (getSouthBoxID (boid -> boxID))].first; makeSum(boid, conductor, &sumFX, &sumFY, &sumVX, &sumVY); /* check neighbors in the northwest box */ conductor = box[getWestBoxID (getNorthBoxID (boid -> boxID))].first; makeSum(boid, conductor, &sumFX, &sumFY, &sumVX, &sumVY); /* check neighbors in the southwest box */ conductor = box[getWestBoxID (getSouthBoxID (boid -> boxID))].first; makeSum(boid, conductor, &sumFX, &sumFY, &sumVX, &sumVY); uAngle = RANDOM_0 (PI * 2.0); uX = cos (uAngle); uY = sin (uAngle); sumX = (double) ETA * uX + sumVX + sumFX; sumY = (double) ETA * uY + sumVY + sumFY; sum = sqrt (pow (sumX, 2.0) + pow (sumY, 2.0)); boid -> newVelocity[X] = V0 * sumX / sum; boid -> newVelocity[Y] = V0 * sumY / sum; } void setNextPosition (struct Boid* const boid) { boid -> position[X] += boid -> newVelocity[X] * DT; boid -> position[Y] += boid -> newVelocity[Y] * DT; boid -> velocity[X] = boid -> newVelocity[X]; boid -> velocity[Y] = boid -> newVelocity[Y]; } void* callNextPositionThread (void* const input) { const struct Parameters* const parameters = input; struct Boid* const boid = parameters -> boid; /* struct Boid array. */ //struct Box* const box = parameters -> box; /* struct Box array. */ unsigned int boidCount; for (boidCount = parameters -> left; boidCount < parameters -> right; ++boidCount) setNextPosition ((boid + boidCount)); return NULL; } void* callNextVelocityThread (void *input) { const struct Parameters* const parameters = input; struct Boid* const boid = parameters -> boid; /* struct Boid array. */ struct Box* const box = parameters -> box; /* struct Box array. */ unsigned int boidCount; /*for (boidCount = parameters -> left; \ boidCount < parameters -> right; \ ++boidCount) checkLimits(boid+boidCount); */ for (boidCount = parameters -> left; boidCount < parameters -> right; ++boidCount) setNextVelocity (boid + boidCount, box); return NULL; } void nextStep (void* const parameters[]) { unsigned int threadID; for (threadID = 0; threadID < NUM_THREADS; ++threadID) pthread_create (&thread[threadID], NULL, callNextVelocityThread, parameters[threadID]); for (threadID = 0; threadID < NUM_THREADS; ++threadID) pthread_join (thread[threadID], NULL); for (threadID = 0; threadID < NUM_THREADS; ++threadID) pthread_create (&thread[threadID], NULL, callNextPositionThread, parameters[threadID]); for (threadID = 0; threadID < NUM_THREADS; ++threadID) pthread_join (thread[threadID], NULL); }``````