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factor out result message display and clean up ordinal switch

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jason
2022-01-04 23:14:58 -08:00
parent 347558b966
commit 98b4e94719
1 changed files with 76 additions and 83 deletions
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77
81_Splat/java/src/Splat.java
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@@ -6,6 +6,9 @@ import java.util.Scanner;
public class Splat { public class Splat {
private static final Random random = new Random(); private static final Random random = new Random();
private final Scanner scanner = new Scanner(System.in); private final Scanner scanner = new Scanner(System.in);
private final float[] Arr = new float[42];
private int K = 0;
private int K1 = 0;
public static void main(String[] args) { public static void main(String[] args) {
new Splat().run(); new Splat().run();
@@ -14,10 +17,7 @@ public class Splat {
public void run() { public void run() {
showIntroduction(); showIntroduction();
float[] Arr = new float[42];
Arrays.fill(Arr, 0.0f); Arrays.fill(Arr, 0.0f);
int K = 0;
int K1 = 0;
while (true) { while (true) {
InitialJumpConditions initial = buildInitialConditions(); InitialJumpConditions initial = buildInitialConditions();
@@ -33,16 +33,26 @@ public class Splat {
System.out.println("HERE WE GO.\n"); System.out.println("HERE WE GO.\n");
System.out.println("TIME (SEC) DIST TO FALL (FT)"); System.out.println("TIME (SEC) DIST TO FALL (FT)");
System.out.println("========== ================="); System.out.println("========== =================");
JumpResult jump = executeJump(initial, freefallTime);
showJumpResults(initial, jump);
if(!playAgain()){
System.out.println("SSSSSSSSSS.");
return;
}
}
}
private void showJumpResults(InitialJumpConditions initial, JumpResult jump) {
final float V = initial.getTerminalVelocity(); final float V = initial.getTerminalVelocity();
final float A = initial.getAcceleration(); final float A = initial.getAcceleration();
JumpResult jump = executeJump(initial, freefallTime);
if (jump.isSplat()) { if (jump.isSplat()) {
if (jump.hasReachedTerminalVelocity()) { if (jump.hasReachedTerminalVelocity()) {
System.out.printf("%.2f SPLAT\n", (V / A) + ((initial.getAltitude() - (V * V / (2 * A))) / V)); System.out.printf("%.2f SPLAT\n", (V / A) + ((initial.getAltitude() - (V * V / (2 * A))) / V));
} else { } else {
System.out.printf("%.2f SPLAT\n", Math.sqrt(2 * initial.getAltitude() / A)); System.out.printf("%.2f SPLAT\n", Math.sqrt(2 * initial.getAltitude() / A));
} }
showRandomSplatMessage(); showRandomSplatMessage();
} else { } else {
@@ -84,55 +94,39 @@ public class Splat {
System.out.printf("JUMPS BEFORE YOURS AND YOU CAME IN NUMBER %d! GET WITH IT!\n", K - K1); System.out.printf("JUMPS BEFORE YOURS AND YOU CAME IN NUMBER %d! GET WITH IT!\n", K - K1);
} }
} else { } else {
System.out.println("AMAZING!!! NOT BAD FOR YOUR "); String[] nums = new String[]{ "1ST", "2ND", "3RD"};
switch (J) { System.out.printf("AMAZING!!! NOT BAD FOR YOUR %s SUCCESSFUL JUMP!!!\n", nums[J]);
case 0:
System.out.print("1ST ");
break;
case 1:
System.out.print("2ND ");
break;
case 2:
System.out.print("3RD ");
break;
} }
System.out.println("SUCCESSFUL JUMP!!!");
}
}
if(!playAgain()){
return;
} }
} }
} private JumpResult executeJump(InitialJumpConditions initial, float chuteOpenTime) {
private JumpResult executeJump(InitialJumpConditions initial, float T) {
final float V = initial.getTerminalVelocity();
final float A = initial.getAcceleration();
JumpResult jump = new JumpResult(initial.getAltitude()); JumpResult jump = new JumpResult(initial.getAltitude());
for (float i = 0.0f; !jump.isSplat() && (i < T); i += T / 8) { for (float time = 0.0f; !jump.isSplat() && (time < chuteOpenTime); time += chuteOpenTime / 8) {
if (i > initial.getTimeOfTerminalAccelerationReached()) { if (!jump.hasReachedTerminalVelocity() && time > initial.getTimeOfTerminalAccelerationReached()) {
jump.setReachedTerminalVelocity(); jump.setReachedTerminalVelocity();
System.out.printf("TERMINAL VELOCITY REACHED AT T PLUS %f SECONDS.\n", initial.getTimeOfTerminalAccelerationReached()); System.out.printf("TERMINAL VELOCITY REACHED AT T PLUS %f SECONDS.\n", initial.getTimeOfTerminalAccelerationReached());
for (i = i; i < T; i += T / 8) { }
jump.setDistance(initial.getAltitude() - ((V * V / (2 * A)) + (V * (i - (V / A))))); float newDistance = computeDistance(initial, time, jump.hasReachedTerminalVelocity());
jump.setDistance(newDistance);
if (jump.isSplat()) { if (jump.isSplat()) {
break; return jump;
} }
System.out.printf("%10.2f %f\n", i, jump.getDistance()); System.out.printf("%10.2f %f\n", time, jump.getDistance());
}
break;
}
jump.setDistance( initial.getAltitude() - ((A / 2) * i * i));
if (jump.isSplat()) {
break;
}
System.out.printf("%10.2f %f\n", i, jump.getDistance());
} }
return jump; return jump;
} }
private float computeDistance(InitialJumpConditions initial, float i, boolean hasReachedTerminalVelocity) {
final float V = initial.getTerminalVelocity();
final float A = initial.getAcceleration();
if(hasReachedTerminalVelocity) {
return initial.getAltitude() - ((V * V / (2 * A)) + (V * (i - (V / A))));
}
return initial.getAltitude() - ((A / 2) * i * i);
}
private boolean playAgain() { private boolean playAgain() {
if (askYesNo("DO YOU WANT TO PLAY AGAIN ")) { if (askYesNo("DO YOU WANT TO PLAY AGAIN ")) {
return true; return true;
@@ -140,7 +134,6 @@ public class Splat {
if (askYesNo("PLEASE")) { if (askYesNo("PLEASE")) {
return true; return true;
} }
System.out.println("SSSSSSSSSS.");
return false; return false;
} }