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Remove Hydrology
This commit is contained in:
Brian Neumann-Fopiano
@@ -1,157 +0,0 @@
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package art.arcane.iris.probe;
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import art.arcane.iris.engine.river.RiverBodyProfile;
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import art.arcane.iris.engine.river.RiverEdgeId;
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import art.arcane.iris.engine.river.RiverNode;
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import art.arcane.iris.engine.river.RiverNodeId;
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import art.arcane.iris.engine.river.RiverPolyline;
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import art.arcane.iris.engine.river.RiverReach;
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import art.arcane.iris.engine.river.RiverRouteState;
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import art.arcane.iris.engine.river.RiverSample;
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import art.arcane.iris.engine.river.RiverTile;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Locale;
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public final class RiverTileProbe {
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private static final int WARMUP_ROUNDS = 5;
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private static final int MEASURED_ROUNDS = 25;
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private static final int SAMPLES_PER_ROUND = 8_192;
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private RiverTileProbe() {
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}
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public static void main(String[] args) {
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RiverTile tile = createTile();
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long expectedSignature = sampleRound(tile);
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for (int round = 0; round < WARMUP_ROUNDS; round++) {
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requireSignature(expectedSignature, sampleRound(tile));
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}
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long[] timings = new long[MEASURED_ROUNDS];
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for (int round = 0; round < MEASURED_ROUNDS; round++) {
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long start = System.nanoTime();
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long signature = sampleRound(tile);
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timings[round] = System.nanoTime() - start;
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requireSignature(expectedSignature, signature);
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System.out.printf(Locale.ROOT,
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"IRIS_RIVER_TILE_SAMPLE round=%d nanos=%d signature=%016x%n",
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round,
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timings[round],
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signature);
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}
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long[] sorted = timings.clone();
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Arrays.sort(sorted);
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System.out.printf(Locale.ROOT,
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"IRIS_RIVER_TILE_RESULT version=1 rounds=%d samples_per_round=%d median_nanos=%d p95_nanos=%d signature=%016x%n",
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MEASURED_ROUNDS,
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SAMPLES_PER_ROUND,
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sorted[MEASURED_ROUNDS / 2],
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sorted[(int) StrictMath.ceil(MEASURED_ROUNDS * 0.95D) - 1],
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expectedSignature);
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}
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private static RiverTile createTile() {
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List<RiverReach> reaches = new ArrayList<>(64);
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for (int reachIndex = 0; reachIndex < 64; reachIndex++) {
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RiverNode from = node(0L, reachIndex, 0D, reachIndex * 32D);
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RiverNode to = node(1L, reachIndex, 2_048D, reachIndex * 32D);
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RiverBodyProfile profile = profile(reachIndex);
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double[] x = new double[33];
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double[] z = new double[33];
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for (int point = 0; point < x.length; point++) {
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x[point] = point * 64D;
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z[point] = reachIndex * 32D
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+ StrictMath.sin(point * 0.625D + reachIndex * 0.25D) * 12D;
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}
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reaches.add(new RiverReach(
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RiverEdgeId.of(from.id(), to.id()),
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from,
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to,
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RiverRouteState.WET,
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1 + reachIndex % 4,
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1 + reachIndex % 3,
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profile.maximumWidth(),
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profile.maximumBankWidth(),
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profile.maximumDepth(),
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profile,
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false,
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false,
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new RiverPolyline(x, z)
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));
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}
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return new RiverTile(0, 0, 0, 0, 2_048, 2_048, reaches);
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}
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private static RiverBodyProfile profile(int reachIndex) {
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double[] positions = new double[17];
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double[] widths = new double[17];
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double[] bankWidths = new double[17];
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double[] depths = new double[17];
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double[] roofScales = new double[17];
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for (int index = 0; index < positions.length; index++) {
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double position = index / 16D;
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double body = StrictMath.sin(StrictMath.PI * position);
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positions[index] = position;
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widths[index] = 8D + reachIndex % 5 + body * 6D;
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bankWidths[index] = 4D + reachIndex % 3 + body * 4D;
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depths[index] = 3D + reachIndex % 2 + body * 2D;
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roofScales[index] = 1D - body * 0.4D;
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}
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return new RiverBodyProfile(positions, widths, bankWidths, depths, roofScales);
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}
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private static RiverNode node(long cellX, long cellZ, double x, double z) {
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return new RiverNode(
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new RiverNodeId(cellX, cellZ),
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x,
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z,
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64D,
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64D,
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64D,
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64D,
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false,
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true
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);
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}
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private static long sampleRound(RiverTile tile) {
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long signature = 0xCBF29CE484222325L;
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for (int sampleIndex = 0; sampleIndex < SAMPLES_PER_ROUND; sampleIndex++) {
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double x = Math.floorMod(sampleIndex * 1_229, 2_048) + 0.375D;
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double z = Math.floorMod(sampleIndex * 811, 2_048) + 0.625D;
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double additionalRadius = 16D + sampleIndex % 17;
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RiverSample sample = tile.sampleExpanded(x, z, additionalRadius);
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signature = mix(signature, sample.present() ? 1L : 0L);
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if (!sample.present()) {
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continue;
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}
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signature = mix(signature, sample.reachId().stableId());
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signature = mix(signature, Double.doubleToLongBits(sample.distance()));
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signature = mix(signature, Double.doubleToLongBits(sample.alongReach()));
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signature = mix(signature, Double.doubleToLongBits(sample.carveWeight()));
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signature = mix(signature, Double.doubleToLongBits(sample.width()));
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signature = mix(signature, Double.doubleToLongBits(sample.bankWidth()));
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signature = mix(signature, Double.doubleToLongBits(sample.depth()));
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signature = mix(signature, sample.section().ordinal());
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}
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return signature;
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}
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private static long mix(long hash, long value) {
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return (hash ^ value) * 0x100000001B3L;
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}
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private static void requireSignature(long expected, long actual) {
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if (actual != expected) {
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throw new IllegalStateException(String.format(
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Locale.ROOT,
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"River tile output changed: expected %016x but got %016x",
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expected,
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actual
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));
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}
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}
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}
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