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Overview
Comment:Change the logic for movement; this way seems to be closer to how it works in Hero Mesh, due to my experiments
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SHA1: c53823977e47198c5d37d7d1d90367e342ed1f2f
User & Date: user on 2021-01-01 04:13:16
Other Links: manifest | tags
Context
2021-01-03
09:43
Implement sliding check-in: 1490be64d5 user: user tags: trunk
2021-01-01
04:13
Change the logic for movement; this way seems to be closer to how it works in Hero Mesh, due to my experiments check-in: c53823977e user: user tags: trunk
2020-12-31
04:32
Make visual non-continuous animations to stop at the beginning of each turn (maybe this should be changed so that it only applies if the object's OF_BUSY flag was set at the time the animation started?) check-in: cb74a8d881 user: user tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Modified class.doc from [04d4b7d173] to [4eb22afd16].

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  Set by the game engine if the requested movement is diagonal.

bit20 *
  If set, then when the movement attempt is restarted (due to bit15 set),
  the direction will be reread from the object's Dir variable.

bit21 *
  Allows the object to move regardless of Height.


bit22 *
  Prevents movement regardless of Height, but may still allow sliding.

bit23 *
  Reserved for future.









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  Set by the game engine if the requested movement is diagonal.

bit20 *
  If set, then when the movement attempt is restarted (due to bit15 set),
  the direction will be reread from the object's Dir variable.

bit21 *
  Allows the object to move regardless of Height. The game engine sets
  this bit if currently the Climb/Height is OK for moving.

bit22 *
  Prevents movement regardless of Height, but may still allow sliding.

bit23 *
  Reserved for future.
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Modified exec.c from [d2b7e53c78] to [009b283128].

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static int move_dir(Uint32 from,Uint32 obj,Uint32 dir) {
  // This function is complicated, and there may be mistakes.
  Object*o;
  Object*oE;
  Object*oF;
  Uint32 objE,objF,objLF,objRF;
  Uint32 hit=0;
  Uint32 hF,vol;
  Value v;
  if(StackProtection()) Throw("Call stack overflow during movement");
  if(obj==VOIDLINK) return 0;
  o=objects[obj];
  o->dir=dir=resolve_dir(obj,dir);
  if(o->weight>o->inertia) goto fail;
  o->inertia-=o->weight;
  restart:
  if(hit&0x100000) dir=o->dir;
  objF=obj_dir(obj,dir);
  if(objF==VOIDLINK) goto fail;

  oF=objects[objF];
  hF=oF?height_at(oF->x,oF->y):0;
  if(dir&1) {
    // Diagonal movement

    objLF=obj_dir(obj,(dir+1)&7);
    objRF=obj_dir(obj,(dir-1)&7);
    vol=o->volume;
    if(objLF!=VOIDLINK) vol+=volume_at(objects[objLF]->x,objects[objLF]->y);
    if(objRF!=VOIDLINK) vol+=volume_at(objects[objRF]->x,objects[objRF]->y);
    if(vol<=max_volume) {
      objE=objF;
      while(objE!=VOIDLINK) {
        if(o->oflags&(OF_DESTROYED|OF_VISUALONLY)) break;
        oE=objects[objE];
        if(oE->height>0) {

          v=send_message(objE,obj,MSG_HIT,NVALUE(oE->x),NVALUE(oE->y),NVALUE(hit|0x80000));
          if(v.t) Throw("Type mismatch in HIT/HITBY");
          hit=v.u&(classes[o->class]->cflags&CF_COMPATIBLE?0xFC098F7F:-1);
          if(hit&8) goto fail;
          if(!(hit&0x11)) {
            v=send_message(obj,objE,MSG_HITBY,NVALUE(o->x),NVALUE(o->y),NVALUE(hit|0x80000));
            if(v.t) Throw("Type mismatch in HIT/HITBY");
            hit=v.u&(classes[oE->class]->cflags&CF_COMPATIBLE?0xFC098F7F:-1);
            if(hit&8) goto fail;
          }
        }
        objE=obj_below(objE);
      }
      if(!(hit&0x402008)) {
        if(hF<=o->climb || (hit&0x200000)) {
          if(hit&0x20000) goto success;
          if(!oF) goto fail;
          if(move_to(from,obj,oF->x,oF->y)) goto success; else goto fail;
        }
      }
    } else {
      // Volume is too much; hit the objects it won't go between
      if(o->oflags&(OF_DESTROYED|OF_VISUALONLY)) goto fail;
      objE=objLF;
      while(objE!=VOIDLINK) {
        oE=objects[objE];








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static int move_dir(Uint32 from,Uint32 obj,Uint32 dir) {
  // This function is complicated, and there may be mistakes.
  Object*o;
  Object*oE;
  Object*oF;
  Uint32 objE,objF,objLF,objRF;
  Uint32 hit=0;
  Uint32 vol;
  Value v;
  if(StackProtection()) Throw("Call stack overflow during movement");
  if(obj==VOIDLINK) return 0;
  o=objects[obj];
  o->dir=dir=resolve_dir(obj,dir);
  if(o->weight>o->inertia) goto fail;
  o->inertia-=o->weight;
  restart:
  if(hit&0x100000) dir=o->dir;
  objF=obj_dir(obj,dir);
  if(objF==VOIDLINK) goto fail;
  if(hit) hit=(hit&0x0C000000)|0x800;
  oF=objects[objF];
  if(height_at(oF->x,oF->y)<=o->climb) hit|=0x200000;
  if(dir&1) {
    // Diagonal movement
    hit|=0x80000;
    objLF=obj_dir(obj,(dir+1)&7);
    objRF=obj_dir(obj,(dir-1)&7);
    vol=o->volume;
    if(objLF!=VOIDLINK) vol+=volume_at(objects[objLF]->x,objects[objLF]->y);
    if(objRF!=VOIDLINK) vol+=volume_at(objects[objRF]->x,objects[objRF]->y);
    if(vol<=max_volume) {
      objE=objF;
      while(objE!=VOIDLINK) {
        if(o->oflags&(OF_DESTROYED|OF_VISUALONLY)) break;
        oE=objects[objE];
        if(oE->height>0) {
          hit&=0xFC287000;
          v=send_message(objE,obj,MSG_HIT,NVALUE(oE->x),NVALUE(oE->y),NVALUE(hit));
          if(v.t) Throw("Type mismatch in HIT/HITBY");
          hit|=v.u&(classes[o->class]->cflags&CF_COMPATIBLE?0xFC098F7F:-1);
          if(hit&8) goto fail;
          if(!(hit&0x11)) {
            v=send_message(obj,objE,MSG_HITBY,NVALUE(o->x),NVALUE(o->y),NVALUE(hit));
            if(v.t) Throw("Type mismatch in HIT/HITBY");
            hit|=v.u&(classes[oE->class]->cflags&CF_COMPATIBLE?0xFC098F7F:-1);
            if(hit&8) goto fail;
          }
        }
        objE=obj_below(objE);
      }
      if((hit&0x200000) && !(hit&0x402008)) {

        if(hit&0x20000) goto success;
        if(!oF) goto fail;
        if(move_to(from,obj,oF->x,oF->y)) goto success; else goto fail;

      }
    } else {
      // Volume is too much; hit the objects it won't go between
      if(o->oflags&(OF_DESTROYED|OF_VISUALONLY)) goto fail;
      objE=objLF;
      while(objE!=VOIDLINK) {
        oE=objects[objE];
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          if(!(v.u&1)) v=send_message(obj,objE,MSG_HITBY,NVALUE(o->x),NVALUE(o->y),NVALUE(v.u|0x80008));
        }
        objE=obj_below(objE);
      }
    }
  } else {
    // Orthogonal movement
    if(hit) hit=(hit&0x0C000000)|0x800;
    if(!oF) goto fail;
    objE=objF;
    while(objE!=VOIDLINK) {
      if(o->oflags&(OF_DESTROYED|OF_VISUALONLY)) break;
      oE=objects[objE];
      if(oE->height>0) {
        hit&=~7;








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          if(!(v.u&1)) v=send_message(obj,objE,MSG_HITBY,NVALUE(o->x),NVALUE(o->y),NVALUE(v.u|0x80008));
        }
        objE=obj_below(objE);
      }
    }
  } else {
    // Orthogonal movement

    if(!oF) goto fail;
    objE=objF;
    while(objE!=VOIDLINK) {
      if(o->oflags&(OF_DESTROYED|OF_VISUALONLY)) break;
      oE=objects[objE];
      if(oE->height>0) {
        hit&=~7;
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        }
      }
      if(hit&0x400) goto fail;
      objE=obj_below(objE);
    }
    if(hit&0x2008) goto fail;
    if((hit&0x48000)==0x8000) goto restart;
    if(!(hit&0x400000)) {
      if(hF<=o->climb || (hit&0x200000)) {
        if(hit&0x20000) goto success;
        if(move_to(from,obj,oF->x,oF->y)) goto success; else goto fail;
      }
    }
    // Sliding
    if(hit&0x80) goto fail;
    hit|=0x10000;
    
  }
  fail: if(hit&0x1000) goto success; o->inertia=0; return 0;








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        }
      }
      if(hit&0x400) goto fail;
      objE=obj_below(objE);
    }
    if(hit&0x2008) goto fail;
    if((hit&0x48000)==0x8000) goto restart;
    if((hit&0x200000) && !(hit&0x400000)) {

      if(hit&0x20000) goto success;
      if(move_to(from,obj,oF->x,oF->y)) goto success; else goto fail;

    }
    // Sliding
    if(hit&0x80) goto fail;
    hit|=0x10000;
    
  }
  fail: if(hit&0x1000) goto success; o->inertia=0; return 0;
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