class="kw">package com.hypixel.hytale.server.core.modules.physics.util;

class="kw">import com.hypixel.hytale.math.shape.Box;
class="kw">import com.hypixel.hytale.math.util.TrigMathUtil;
class="kw">import javax.annotation.Nonnull;
class="kw">import org.joml.Vector3d;
class="kw">import org.joml.Vector3dc;

class="kw">public class PhysicsMath {
   class="kw">public class="kw">static class="kw">final double DENSITY_AIR = 1.2;
   class="kw">public class="kw">static class="kw">final double DENSITY_WATER = 998.0;
   class="kw">public class="kw">static class="kw">final double AIR_DENSITY = 0.001225;
   class="kw">public class="kw">static class="kw">final float HEADING_DIRECTION = 1.0F;

   class="kw">public PhysicsMath() {
   }

   class="kw">public class="kw">static double getAcceleration(double var0, double var2) {
      double var4 = Math.abs(var0 / var2);
      class="kw">return 32.0 * (Math.signum(var2) - Math.signum(var0) * (var4 * var4 * var4));
   }

   class="kw">public class="kw">static double getTerminalVelocity(double var0, double var2, double var4, double var6) {
      double var8 = var0 * 1000.0;
      double var10 = var4 * 1000000.0;
      class="kw">return Math.sqrt(64.0 * var8 / (var2 * var10 * var6));
   }

   class="kw">public class="kw">static double getRelativeDensity(Vector3d var0, Box var1) {
      class="kw">return 0.001225;
   }

   class="kw">public class="kw">static double computeDragCoefficient(double var0, double var2, double var4, double var6) {
      class="kw">return var4 * var6 / (var2 * var0 * var0);
   }

   class="kw">public class="kw">static double computeTerminalSpeed(double var0, double var2, double var4, double var6) {
      class="kw">return Math.sqrt(var4 * var6 / (var2 * var0));
   }

   class="kw">public class="kw">static double computeProjectedArea(double var0, double var2, double var4, @Nonnull Box var6) {
      double var7 = 0.0;
      if (var0 != 0.0) {
         var7 += Math.abs(var0) * var6.depth() * var6.height();
      }

      if (var2 != 0.0) {
         var7 += Math.abs(var2) * var6.depth() * var6.width();
      }

      if (var4 != 0.0) {
         var7 += Math.abs(var4) * var6.width() * var6.height();
      }

      class="kw">return var7;
   }

   class="kw">public class="kw">static double computeProjectedArea(@Nonnull Vector3d var0, @Nonnull Box var1) {
      class="kw">return computeProjectedArea(var0.x, var0.y, var0.z, var1);
   }

   class="kw">public class="kw">static double volumeOfIntersection(@Nonnull Box var0, @Nonnull Vector3dc var1, @Nonnull Box var2, @Nonnull Vector3dc var3) {
      class="kw">return volumeOfIntersection(var0, var1, var2, var3.x(), var3.y(), var3.z());
   }

   class="kw">public class="kw">static double volumeOfIntersection(@Nonnull Box var0, @Nonnull Vector3dc var1, @Nonnull Box var2, double var3, double var5, double var7) {
      var3 -= var1.x();
      var5 -= var1.y();
      var7 -= var1.z();
      class="kw">return lengthOfIntersection(var0.min.x, var0.max.x, var3 + var2.min.x, var3 + var2.max.x)
         * lengthOfIntersection(var0.min.y, var0.max.y, var5 + var2.min.y, var5 + var2.max.y)
         * lengthOfIntersection(var0.min.z, var0.max.z, var7 + var2.min.z, var7 + var2.max.z);
   }

   class="kw">public class="kw">static double lengthOfIntersection(double var0, double var2, double var4, double var6) {
      double var8 = Math.max(var0, var4);
      double var10 = Math.min(var2, var6);
      class="kw">return Math.max(0.0, var10 - var8);
   }

   class="kw">public class="kw">static float headingFromDirection(double var0, double var2) {
      class="kw">return 1.0F * TrigMathUtil.atan2(-var0, -var2);
   }

   class="kw">public class="kw">static float normalizeAngle(float var0) {
      var0 %= (float) (Math.PI * 2);
      if (var0 < 0.0F) {
         var0 += (float) (Math.PI * 2);
      }

      class="kw">return var0;
   }

   class="kw">public class="kw">static float normalizeTurnAngle(float var0) {
      var0 = normalizeAngle(var0);
      if (var0 >= (float) Math.PI) {
         var0 -= (float) (Math.PI * 2);
      }

      class="kw">return var0;
   }

   class="kw">public class="kw">static float pitchFromDirection(double var0, double var2, double var4) {
      class="kw">return TrigMathUtil.atan2(var2, Math.sqrt(var0 * var0 + var4 * var4));
   }

   @Nonnull
   class="kw">public class="kw">static Vector3d vectorFromAngles(float var0, float var1, @Nonnull Vector3d var2) {
      float var3 = pitchX(var1);
      var2.y = pitchY(var1);
      var2.x = headingX(var0) * var3;
      var2.z = headingZ(var0) * var3;
      class="kw">return var2;
   }

   class="kw">public class="kw">static float pitchX(float var0) {
      class="kw">return TrigMathUtil.cos(var0);
   }

   class="kw">public class="kw">static float pitchY(float var0) {
      class="kw">return TrigMathUtil.sin(var0);
   }

   class="kw">public class="kw">static float headingX(float var0) {
      class="kw">return -TrigMathUtil.sin(1.0F * var0);
   }

   class="kw">public class="kw">static float headingZ(float var0) {
      class="kw">return -TrigMathUtil.cos(1.0F * var0);
   }
}