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| − | Unlike any other wall smoothing method, all using some kind of imaginary stick — this approach simulates exact robocode physics without using iterations.
| + | #REDIRECT [[Wall Smoothing/Precise]] |
| − | | |
| − | <syntaxhighlight>
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| − | public final class ExactWallSmooth {
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| − | private static final double DELTA_SIN = Math.sin(Rules.getTurnRateRadians(Rules.MAX_VELOCITY) / 2);
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| − | private static final double DELTA_COS = Math.sqrt(1 - DELTA_SIN * DELTA_SIN);
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| − | private static final double INNER_R = Rules.MAX_VELOCITY / 2 / Math.tan(Rules.getTurnRateRadians(Rules.MAX_VELOCITY) / 2);
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| − | private static final double OUTER_R = Rules.MAX_VELOCITY / 2 / DELTA_SIN;
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| − | private static final double WALL_PADDING = 18.5;
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| − | | |
| − | private final double MIN_X;
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| − | private final double MIN_Y;
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| − | private final double MAX_X;
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| − | private final double MAX_Y;
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| − | | |
| − | public ExactWallSmooth(double fieldWidth, double fieldHeight) {
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| − | MIN_X = WALL_PADDING;
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| − | MIN_Y = WALL_PADDING;
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| − | MAX_X = fieldWidth - WALL_PADDING;
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| − | MAX_Y = fieldHeight - WALL_PADDING;
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| − | }
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| − | | |
| − | public double smoothHeading(double absoluteHeading, @Output Trig headingTrig, double x, double y, int latDir) {
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| − | double stickBearingSin = +headingTrig.cos * latDir;
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| − | double stickBearingCos = -headingTrig.sin * latDir;
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| − | | |
| − | double stickX = x + INNER_R * stickBearingSin + 4 * headingTrig.sin;
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| − | double stickY = y + INNER_R * stickBearingCos + 4 * headingTrig.cos;
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| − | | |
| − | double stickDistW = stickX - MIN_X;
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| − | double stickDistE = MAX_X - stickX;
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| − | double stickDistN = MAX_Y - stickY;
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| − | double stickDistS = stickY - MIN_Y;
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| − | | |
| − | double distW = x - MIN_X;
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| − | double distE = MAX_X - x;
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| − | double distN = MAX_Y - y;
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| − | double distS = y - MIN_Y;
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| − | | |
| − | double stickDistH;
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| − | WALL wallH = null;
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| − | if (stickDistW < stickDistE) {
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| − | stickDistH = stickDistW;
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| − | if (stickDistH < OUTER_R - 0.1) {
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| − | wallH = WALL.W;
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| − | }
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| − | } else {
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| − | stickDistH = stickDistE;
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| − | if (stickDistH < OUTER_R - 0.1) {
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| − | wallH = WALL.E;
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| − | }
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| − | }
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| − | | |
| − | double stickDistV;
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| − | WALL wallV = null;
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| − | if (stickDistS < stickDistN) {
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| − | stickDistV = stickDistS;
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| − | if (stickDistV < OUTER_R - 0.1) {
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| − | wallV = WALL.S;
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| − | }
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| − | } else {
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| − | stickDistV = stickDistN;
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| − | if (stickDistV < OUTER_R - 0.1) {
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| − | wallV = WALL.N;
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| − | }
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| − | }
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| − | | |
| − | WALL forwardHWall;
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| − | if (headingTrig.sin < 0) {
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| − | forwardHWall = WALL.W;
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| − | } else {
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| − | forwardHWall = WALL.E;
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| − | }
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| − | | |
| − | WALL forwardVWall;
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| − | if (headingTrig.cos < 0) {
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| − | forwardVWall = WALL.S;
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| − | } else {
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| − | forwardVWall = WALL.N;
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| − | }
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| − | | |
| − | WALL firstWall = null;
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| − | WALL secondWall = null;
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| − | double firstDist = Double.NaN;
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| − | double secondDist = Double.NaN;
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| − | | |
| − | if (forwardHWall == wallH && forwardVWall == wallV) {
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| − | if (latDir > 0) {
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| − | if (forwardHWall == WALL.W) {
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| − | if (forwardVWall == WALL.N) {
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| − | firstWall = WALL.W;
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| − | firstDist = distW;
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| − | secondWall = WALL.N;
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| − | secondDist = distN;
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| − | } else {
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| − | firstWall = WALL.S;
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| − | firstDist = distS;
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| − | secondWall = WALL.W;
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| − | secondDist = distW;
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| − | }
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| − | } else {
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| − | if (forwardVWall == WALL.N) {
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| − | firstWall = WALL.N;
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| − | firstDist = distN;
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| − | secondWall = WALL.E;
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| − | secondDist = distE;
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| − | } else {
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| − | firstWall = WALL.E;
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| − | firstDist = distE;
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| − | secondWall = WALL.S;
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| − | secondDist = distS;
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| − | }
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| − | }
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| − | } else {
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| − | if (forwardHWall == WALL.W) {
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| − | if (forwardVWall == WALL.N) {
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| − | firstWall = WALL.N;
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| − | firstDist = distN;
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| − | secondWall = WALL.W;
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| − | secondDist = distW;
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| − | } else {
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| − | firstWall = WALL.W;
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| − | firstDist = distW;
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| − | secondWall = WALL.S;
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| − | secondDist = distS;
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| − | }
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| − | } else {
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| − | if (forwardVWall == WALL.N) {
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| − | firstWall = WALL.E;
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| − | firstDist = distE;
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| − | secondWall = WALL.N;
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| − | secondDist = distN;
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| − | } else {
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| − | firstWall = WALL.S;
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| − | firstDist = distS;
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| − | secondWall = WALL.E;
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| − | secondDist = distE;
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| − | }
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| − | }
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| − | }
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| − | } else if (forwardHWall == wallH) {
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| − | firstWall = wallH;
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| − | firstDist = wallH == WALL.W ? distW : distE;
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| − | } else if (forwardVWall == wallV) {
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| − | firstWall = wallV;
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| − | firstDist = wallV == WALL.S ? distS : distN;
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| − | }
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| − | | |
| − | WALL smoothWall = firstWall;
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| − | double smoothDist = firstDist;
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| − | | |
| − | while (smoothWall != null) {
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| − | double wallSin = (OUTER_R - smoothDist) / OUTER_R;
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| − | if (wallSin > 1) {
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| − | wallSin = 1;
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| − | }
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| − | | |
| − | wallSin *= latDir;
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| − | | |
| − | double wallCos = Math.sqrt(1 - wallSin * wallSin);
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| − | | |
| − | double newWallSin = wallSin * DELTA_COS + wallCos * DELTA_SIN * latDir;
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| − | double newWallCos = wallCos * DELTA_COS - wallSin * DELTA_SIN * latDir;
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| − | | |
| − | if (newWallCos > 0) {
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| − | wallSin = newWallSin;
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| − | wallCos = newWallCos;
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| − | }
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| − | | |
| − | double newSin;
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| − | double newCos;
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| − | if (smoothWall == WALL.N) {
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| − | newSin = +wallSin;
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| − | newCos = +wallCos * +1;
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| − | } else if (smoothWall == WALL.E) {
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| − | newSin = +wallCos * +1;
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| − | newCos = -wallSin;
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| − | } else if (smoothWall == WALL.S) {
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| − | newSin = -wallSin;
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| − | newCos = -wallCos * +1;
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| − | } else {
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| − | newSin = -wallCos * +1;
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| − | newCos = +wallSin;
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| − | }
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| − | | |
| − | double newHeading = Math.atan2(newSin, newCos);
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| − | | |
| − | if (Math.signum(Utils.normalRelativeAngle(newHeading - absoluteHeading)) == latDir) {
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| − | headingTrig.sin = newSin;
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| − | headingTrig.cos = newCos;
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| − | | |
| − | absoluteHeading = newHeading;
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| − | }
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| − | | |
| − | if (smoothWall == firstWall) {
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| − | smoothWall = secondWall;
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| − | smoothDist = secondDist;
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| − | } else {
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| − | break;
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| − | }
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| − | }
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| − | return absoluteHeading;
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| − | }
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| − | | |
| − | enum WALL {
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| − | W, N, E, S,
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| − | }
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| − | | |
| − | }
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| − | </syntaxhighlight>
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| − | | |
| − | | |
| − | [[Category:Code Snippets]] | |
| − | [[Category:Movement]]
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