Removed the previously used homers code and instead used old one to keep good ol' Gameplay; Removed FrameCount steps from track_track_goal() and scaled homing vector accordingly to this change, including properly scaling it to FrameTime; Made code more similar between D1X and D2X; Introduced different turn rates for different difficulty levels
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@ -3,6 +3,7 @@ D1X-Rebirth Changelog
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20100615
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--------
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main/game.c, main/gameseq.c: Resetting GameTime, Next/Last_flare/laser/missile_time in reset_time() together so GameTime-rollover-fallbacks will not create a massive delay when starting a new level
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main/laser.c: Removed the previously homers code and instead used old one to keep good ol' Gameplay; Removed FrameCount steps from track_track_goal() and scaled homing vector accordingly to this change, including properly scaling it to FrameTime; Made code more similar between D1X and D2X; Introduced different turn rates for different difficulty levels
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20100614
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--------
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84
main/laser.c
84
main/laser.c
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@ -45,10 +45,9 @@ COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
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#include "powerup.h"
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#include "multi.h"
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#include "physics.h"
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#include "hudmsg.h"
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#define NEWHOMER
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int Laser_rapid_fire = 0;
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@ -483,9 +482,8 @@ fix Min_trackable_dot = 3*(F1_0 - MIN_TRACKABLE_DOT)/4 + MIN_TRACKABLE_DOT; //MI
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// Return true if weapon *tracker is able to track object Objects[track_goal], else return false.
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// In order for the object to be trackable, it must be within a reasonable turning radius for the missile
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// and it must not be obstructed by a wall.
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int object_is_trackable(int track_goal, object *tracker)
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int object_is_trackable(int track_goal, object *tracker, fix *dot)
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{
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fix dot; //, dist_to_goal;
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vms_vector vector_to_goal;
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object *objp;
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@ -508,9 +506,14 @@ int object_is_trackable(int track_goal, object *tracker)
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vm_vec_sub(&vector_to_goal, &objp->pos, &tracker->pos);
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vm_vec_normalize_quick(&vector_to_goal);
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dot = vm_vec_dot(&vector_to_goal, &tracker->orient.fvec);
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*dot = vm_vec_dot(&vector_to_goal, &tracker->orient.fvec);
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if (dot >= Min_trackable_dot) {
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if ((*dot < Min_trackable_dot) && (*dot > F1_0*9/10)) {
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vm_vec_normalize(&vector_to_goal);
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*dot = vm_vec_dot(&vector_to_goal, &tracker->orient.fvec);
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}
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if (*dot >= Min_trackable_dot) {
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int rval;
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// dot is in legal range, now see if object is visible
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rval = object_to_object_visibility(tracker, objp, FQ_TRANSWALL);
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@ -518,7 +521,6 @@ int object_is_trackable(int track_goal, object *tracker)
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} else {
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return 0;
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}
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}
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// --------------------------------------------------------------------------------------------
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@ -682,11 +684,19 @@ int find_homing_object_complete(vms_vector *curpos, object *tracker, int track_o
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// ------------------------------------------------------------------------------------------------------------
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// See if legal to keep tracking currently tracked object. If not, see if another object is trackable. If not, return -1,
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// else return object number of tracking object.
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int track_track_goal(int track_goal, object *tracker)
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int track_track_goal(int track_goal, object *tracker, fix *dot)
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{
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if (object_is_trackable(track_goal, tracker))
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#ifdef NEWHOMER
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if (object_is_trackable(track_goal, tracker, dot) && (tracker-Objects)) {
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return track_goal;
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else if ((((tracker-Objects) ^ FrameCount) % 4) == 0) {
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} else if (tracker-Objects)
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#else
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// Every 8 frames for each object, scan all objects.
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if (object_is_trackable(track_goal, tracker, dot) && ((((tracker-Objects) ^ FrameCount) % 8) != 0)) {
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return track_goal;
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} else if ((((tracker-Objects) ^ FrameCount) % 4) == 0)
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#endif
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{
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int rval = -2;
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// If player fired missile, then search for an object, if not, then give up.
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@ -953,6 +963,10 @@ void Laser_TurnSpeedLimit(vms_vector* vec_forward, vms_vector* vec_to_target, fi
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*vec_forward = *vec_to_target;
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}
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#ifdef NEWHOMER
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fix homing_turn_base[NDL] = { 20, 30, 40, 50, 60 };
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#endif
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//-------------------------------------------------------------------------------------------
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//sequence this laser object for this _frame_ (underscores added here to aid MK in his searching!)
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void Laser_do_weapon_sequence(object *obj)
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@ -985,7 +999,7 @@ void Laser_do_weapon_sequence(object *obj)
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// For homing missiles, turn towards target.
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if (Weapon_info[obj->id].homing_flag) {
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vms_vector vector_to_object, temp_vec;
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fix dot;
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fix dot=F1_0;
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fix speed, max_speed;
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// For first 1/2 second of life, missile flies straight.
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@ -999,7 +1013,7 @@ void Laser_do_weapon_sequence(object *obj)
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}
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// Make sure the object we are tracking is still trackable.
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track_goal = track_track_goal(track_goal, obj);
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track_goal = track_track_goal(track_goal, obj, &dot);
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if (track_goal == Players[Player_num].objnum) {
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fix dist_to_player;
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@ -1011,39 +1025,32 @@ void Laser_do_weapon_sequence(object *obj)
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}
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if (track_goal != -1) {
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fix turn_radius;
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turn_radius = 0x0024 * F1_0;
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#ifdef NEWHOMER
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vm_vec_sub(&vector_to_object, &Objects[track_goal].pos, &obj->pos);
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// we need normalized exact vectors here
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vm_vec_normalize (&vector_to_object);
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vm_vec_normalize_quick(&vector_to_object);
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temp_vec = obj->mtype.phys_info.velocity;
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// gives magnitude
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speed = vm_vec_normalize(&temp_vec);
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// homing missile speeds : insane - 0x005a
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max_speed = Weapon_info[obj->id].speed[Difficulty_level];
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if (speed+F1_0 < max_speed)
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{
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if (speed+F1_0 < max_speed) {
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speed += fixmul(max_speed, FrameTime/2);
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if (speed > max_speed)
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speed = max_speed;
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}
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dot = vm_vec_dot(&temp_vec, &vector_to_object);
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// Old homers only get valid track_goal every 8 frames. That was changed so scale vector to object accordingly.
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vm_vec_scale(&vector_to_object, F1_0/4);
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// Scale vector to object to current FrameTime.
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vm_vec_scale(&vector_to_object, F1_0/((float)(F1_0/homing_turn_base[Difficulty_level])/FrameTime));
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Laser_TurnSpeedLimit(&temp_vec, &vector_to_object, speed, turn_radius);
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obj->mtype.phys_info.velocity = temp_vec;
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// orient it directly by movement vector
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if (Weapon_info[obj->id].render_type == WEAPON_RENDER_POLYMODEL)
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vm_vector_2_matrix (&obj->orient, &temp_vec, NULL, NULL);
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// apply speed
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vm_vec_add2(&temp_vec, &vector_to_object);
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// The boss' smart children track better...
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if (Weapon_info[obj->id].render_type != WEAPON_RENDER_POLYMODEL)
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vm_vec_add2(&temp_vec, &vector_to_object);
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vm_vec_normalize(&temp_vec);
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vm_vec_scale(&temp_vec, speed);
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obj->mtype.phys_info.velocity = temp_vec;
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// Subtract off life proportional to amount turned.
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// For hardest turn, it will lose 2 seconds per second.
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{
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@ -1051,17 +1058,14 @@ void Laser_do_weapon_sequence(object *obj)
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absdot = abs(F1_0 - dot);
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if (absdot > F1_0/8) {
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if (absdot > F1_0/4)
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absdot = F1_0/4;
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lifelost = fixmul(absdot*16, FrameTime);
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lifelost = fixmul(absdot*32, FrameTime);
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obj->lifeleft -= lifelost;
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}
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//added 8/14/98 by Victor Rachels to make homers lose life while going straight, too
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obj->lifeleft -= fixmul(F1_0, FrameTime);
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//end addition - Victor Rachels
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}
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#if 0 // OLD - ORIGINAL - MISSILE TRACKING CODE
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// Only polygon objects have visible orientation, so only they should turn.
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if (Weapon_info[obj->id].render_type == WEAPON_RENDER_POLYMODEL)
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homing_missile_turn_towards_velocity(obj, &temp_vec); // temp_vec is normalized velocity.
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#else // OLD - ORIGINAL - MISSILE TRACKING CODE
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vm_vec_sub(&vector_to_object, &Objects[track_goal].pos, &obj->pos);
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vm_vec_normalize_quick(&vector_to_object);
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