msg.java

JAKE2用ＪＡＶＡ写的queck2的３Ｄ游戏开发引擎

/*
 * Copyright (C) 1997-2001 Id Software, Inc.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.
 * 
 * See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA.
 *  
 */

// Created on 29.11.2003 by RST.
// $Id: MSG.java,v 1.8 2005/12/18 22:10:02 cawe Exp $
package jake2.qcommon;

import jake2.Globals;
import jake2.game.*;
import jake2.util.*;

public class MSG extends Globals {

    //
    // writing functions
    //

    //ok.
    public static void WriteChar(sizebuf_t sb, int c) {
        sb.data[SZ.GetSpace(sb, 1)] = (byte) (c & 0xFF);
    }

    //ok.
    public static void WriteChar(sizebuf_t sb, float c) {

        WriteChar(sb, (int) c);
    }

    //ok.
    public static void WriteByte(sizebuf_t sb, int c) {
        sb.data[SZ.GetSpace(sb, 1)] = (byte) (c & 0xFF);
    }

    //ok.
    public static void WriteByte(sizebuf_t sb, float c) {
        WriteByte(sb, (int) c);
    }

    public static void WriteShort(sizebuf_t sb, int c) {
        int i = SZ.GetSpace(sb, 2);
        sb.data[i++] = (byte) (c & 0xff);
        sb.data[i] = (byte) ((c >>> 8) & 0xFF);
    }

    //ok.
    public static void WriteInt(sizebuf_t sb, int c) {
        int i = SZ.GetSpace(sb, 4);
        sb.data[i++] = (byte) ((c & 0xff));
        sb.data[i++] = (byte) ((c >>> 8) & 0xff);
        sb.data[i++] = (byte) ((c >>> 16) & 0xff);
        sb.data[i++] = (byte) ((c >>> 24) & 0xff);
    }

    //ok.
    public static void WriteLong(sizebuf_t sb, int c) {
        WriteInt(sb, c);
    }

    //ok.
    public static void WriteFloat(sizebuf_t sb, float f) {
        WriteInt(sb, Float.floatToIntBits(f));
    }

    // had a bug, now its ok.
    public static void WriteString(sizebuf_t sb, String s) {
        String x = s;

        if (s == null)
            x = "";

        SZ.Write(sb, Lib.stringToBytes(x));
        WriteByte(sb, 0);
        //Com.dprintln("MSG.WriteString:" + s.replace('\0', '@'));
    }

    //ok.
    public static void WriteString(sizebuf_t sb, byte s[]) {
        WriteString(sb, new String(s).trim());
    }

    public static void WriteCoord(sizebuf_t sb, float f) {
        WriteShort(sb, (int) (f * 8));
    }

    public static void WritePos(sizebuf_t sb, float[] pos) {
        assert (pos.length == 3) : "vec3_t bug";
        WriteShort(sb, (int) (pos[0] * 8));
        WriteShort(sb, (int) (pos[1] * 8));
        WriteShort(sb, (int) (pos[2] * 8));
    }

    public static void WriteAngle(sizebuf_t sb, float f) {
        WriteByte(sb, (int) (f * 256 / 360) & 255);
    }

    public static void WriteAngle16(sizebuf_t sb, float f) {
        WriteShort(sb, Math3D.ANGLE2SHORT(f));
    }

    public static void WriteDeltaUsercmd(sizebuf_t buf, usercmd_t from,
            usercmd_t cmd) {
        int bits;

        //
        // send the movement message
        //
        bits = 0;
        if (cmd.angles[0] != from.angles[0])
            bits |= CM_ANGLE1;
        if (cmd.angles[1] != from.angles[1])
            bits |= CM_ANGLE2;
        if (cmd.angles[2] != from.angles[2])
            bits |= CM_ANGLE3;
        if (cmd.forwardmove != from.forwardmove)
            bits |= CM_FORWARD;
        if (cmd.sidemove != from.sidemove)
            bits |= CM_SIDE;
        if (cmd.upmove != from.upmove)
            bits |= CM_UP;
        if (cmd.buttons != from.buttons)
            bits |= CM_BUTTONS;
        if (cmd.impulse != from.impulse)
            bits |= CM_IMPULSE;

        WriteByte(buf, bits);

        if ((bits & CM_ANGLE1) != 0)
            WriteShort(buf, cmd.angles[0]);
        if ((bits & CM_ANGLE2) != 0)
            WriteShort(buf, cmd.angles[1]);
        if ((bits & CM_ANGLE3) != 0)
            WriteShort(buf, cmd.angles[2]);

        if ((bits & CM_FORWARD) != 0)
            WriteShort(buf, cmd.forwardmove);
        if ((bits & CM_SIDE) != 0)
            WriteShort(buf, cmd.sidemove);
        if ((bits & CM_UP) != 0)
            WriteShort(buf, cmd.upmove);

        if ((bits & CM_BUTTONS) != 0)
            WriteByte(buf, cmd.buttons);
        if ((bits & CM_IMPULSE) != 0)
            WriteByte(buf, cmd.impulse);

        WriteByte(buf, cmd.msec);
        WriteByte(buf, cmd.lightlevel);
    }

    //should be ok.
    public static void WriteDir(sizebuf_t sb, float[] dir) {
        int i, best;
        float d, bestd;

        if (dir == null) {
            WriteByte(sb, 0);
            return;
        }

        bestd = 0;
        best = 0;
        for (i = 0; i < NUMVERTEXNORMALS; i++) {
            d = Math3D.DotProduct(dir, bytedirs[i]);
            if (d > bestd) {
                bestd = d;
                best = i;
            }
        }
        WriteByte(sb, best);
    }

    //should be ok.
    public static void ReadDir(sizebuf_t sb, float[] dir) {
        int b;

        b = ReadByte(sb);
        if (b >= NUMVERTEXNORMALS)
            Com.Error(ERR_DROP, "MSF_ReadDir: out of range");
        Math3D.VectorCopy(bytedirs[b], dir);
    }

    /*
     * ================== WriteDeltaEntity
     * 
     * Writes part of a packetentities message. Can delta from either a baseline
     * or a previous packet_entity ==================
     */
    public static void WriteDeltaEntity(entity_state_t from, entity_state_t to,
            sizebuf_t msg, boolean force, boolean newentity) {
        int bits;

        if (0 == to.number)
            Com.Error(ERR_FATAL, "Unset entity number");
        if (to.number >= MAX_EDICTS)
            Com.Error(ERR_FATAL, "Entity number >= MAX_EDICTS");

        // send an update
        bits = 0;

        if (to.number >= 256)
            bits |= U_NUMBER16; // number8 is implicit otherwise

        if (to.origin[0] != from.origin[0])
            bits |= U_ORIGIN1;
        if (to.origin[1] != from.origin[1])
            bits |= U_ORIGIN2;
        if (to.origin[2] != from.origin[2])
            bits |= U_ORIGIN3;

        if (to.angles[0] != from.angles[0])
            bits |= U_ANGLE1;
        if (to.angles[1] != from.angles[1])
            bits |= U_ANGLE2;
        if (to.angles[2] != from.angles[2])
            bits |= U_ANGLE3;

        if (to.skinnum != from.skinnum) {
            if (to.skinnum < 256)
                bits |= U_SKIN8;
            else if (to.skinnum < 0x10000)
                bits |= U_SKIN16;
            else
                bits |= (U_SKIN8 | U_SKIN16);
        }

        if (to.frame != from.frame) {
            if (to.frame < 256)
                bits |= U_FRAME8;
            else
                bits |= U_FRAME16;
        }

        if (to.effects != from.effects) {
            if (to.effects < 256)
                bits |= U_EFFECTS8;
            else if (to.effects < 0x8000)
                bits |= U_EFFECTS16;
            else
                bits |= U_EFFECTS8 | U_EFFECTS16;
        }

        if (to.renderfx != from.renderfx) {
            if (to.renderfx < 256)
                bits |= U_RENDERFX8;
            else if (to.renderfx < 0x8000)
                bits |= U_RENDERFX16;
            else
                bits |= U_RENDERFX8 | U_RENDERFX16;
        }

        if (to.solid != from.solid)
            bits |= U_SOLID;

        // event is not delta compressed, just 0 compressed
        if (to.event != 0)
            bits |= U_EVENT;

        if (to.modelindex != from.modelindex)
            bits |= U_MODEL;
        if (to.modelindex2 != from.modelindex2)
            bits |= U_MODEL2;
        if (to.modelindex3 != from.modelindex3)
            bits |= U_MODEL3;
        if (to.modelindex4 != from.modelindex4)
            bits |= U_MODEL4;