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106 lines
3.6 KiB
C#
106 lines
3.6 KiB
C#
// Copyright 2014-2017 ClassicalSharp | Licensed under BSD-3
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using System;
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using ClassicalSharp.Map;
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using OpenTK;
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namespace ClassicalSharp.Singleplayer {
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public class TNTPhysics {
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Game game;
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World map;
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PhysicsBase physics;
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Random rnd = new Random();
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public TNTPhysics(Game game, PhysicsBase physics) {
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this.game = game;
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map = game.World;
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this.physics = physics;
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physics.OnPlace[Block.TNT] = HandleTnt;
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}
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Vector3[] rayDirs;
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const float stepLen = 0.3f;
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float[] hardness;
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void HandleTnt(int index, byte block) {
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int x = index % map.Width;
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int z = (index / map.Width) % map.Length;
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int y = (index / map.Width) / map.Length;
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Explode(4, x, y, z);
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}
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// Algorithm source: http://minecraft.gamepedia.com/Explosion
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public void Explode(float power, int x, int y, int z) {
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if (rayDirs == null)
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InitExplosionCache();
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game.UpdateBlock(x, y, z, Block.Air);
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int index = (y * map.Length + z) * map.Width + x;
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physics.ActivateNeighbours(x, y, z, index);
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Vector3 basePos = new Vector3(x, y, z);
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for (int i = 0; i < rayDirs.Length; i++) {
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Vector3 dir = rayDirs[i] * stepLen;
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Vector3 position = basePos;
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float intensity = (float)(0.7 + rnd.NextDouble() * 0.6) * power;
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while (intensity > 0) {
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position += dir;
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intensity -= stepLen * 0.75f;
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Vector3I P = Vector3I.Floor(position);
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if (!map.IsValidPos(P)) break;
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byte block = map.GetBlock(P);
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intensity -= (hardness[block] / 5 + 0.3f) * stepLen;
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if (intensity > 0 && block != 0) {
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game.UpdateBlock(P.X, P.Y, P.Z, Block.Air);
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index = (P.Y * map.Length + P.Z) * map.Width + P.X;
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physics.ActivateNeighbours(P.X, P.Y, P.Z, index);
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}
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}
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}
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}
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void InitExplosionCache() {
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hardness = new float[] { 0, 30, 3, 2.5f, 30, 15, 0, 1.8E+07f, 500, 500, 500, 500, 2.5f,
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3, 15, 15, 15, 10, 1, 3, 1.5f, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 0,
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0, 0, 30, 30, 30, 30, 30, 0, 7.5f, 30, 6000, 30, 0, 4, 0.5f, 0, 4, 4, 4, 4, 4, 2.5f,
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// Note that the 30, 500, 15, 15 are guesses (CeramicTile --> Crate)
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30, 500, 15, 15, 30, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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rayDirs = new Vector3[1352];
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int index = 0;
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// Y bottom and top planes
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for (float x = -1; x <= 1.001f; x += 2f/15) {
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for (float z = -1; z <= 1.001f; z += 2f/15) {
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rayDirs[index++] = Normalise(x, -1, z);
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rayDirs[index++] = Normalise(x, +1, z);
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}
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}
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// Z planes
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for (float y = -1 + 2f/15; y <= 1.001f - 2f/15; y += 2f/15) {
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for (float x = -1; x <= 1.001f; x += 2f/15) {
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rayDirs[index++] = Normalise(x, y, -1);
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rayDirs[index++] = Normalise(x, y, +1);
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}
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}
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// X planes
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for (float y = -1 + 2f/15; y <= 1.001f - 2f/15; y += 2f/15) {
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for (float z = -1 + 2f/15; z <= 1.001f - 2f/15; z += 2f/15) {
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rayDirs[index++] = Normalise(-1, y, z);
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rayDirs[index++] = Normalise(+1, y, z);
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}
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}
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}
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static Vector3 Normalise(float x, float y, float z) {
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float scale = 1f / (float)Math.Sqrt(x * x + y * y + z * z);
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return new Vector3(x * scale, y * scale, z * scale);
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}
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}
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} |