movement polishes

1 files changed, 42 insertions, 17 deletions

diff --git a/src/game/physics/movement.cpp b/src/game/physics/movement.cpp
index 31ae63f..73c5202 100644
--- a/src/game/physics/movement.cpp
+++ b/src/game/physics/movement.cpp
@@ -189,7 +189,7 @@ void gmove_categorize_pos() {
     gmove_touch_ground( &tr, bump, point );
     if( !tr.hit || tr.normal.z < 0.7f ) {
       gmove_touch_ground_quadrants( &tr, bump, point );
-        if( !tr.hit || tr.normal.z < 0.7f ) {
+      if( !tr.hit || tr.normal.z < 0.7f ) {
         gmove->ground = 0;
 
         if( gmove->velocity.z > 0.f ) {
@@ -268,11 +268,10 @@ F32 gmove_try_move( BSP_TRACE* t, VEC3* pos, VEC3* vel ) {
 void gmove_check_stuck( VEC3* in_pos ) {
   BSP_TRACE t;
   VEC3 pos = *in_pos;
+  U32 i;
   if( vec_len( gmove->unstuck_vel ) < 0.f )
     gmove->unstuck_vel = { 0, 0, 1.f };
 
-  if( gmove->ground )
-    pos.z += 2.f;
   bsp_trace( &t, gmove->bsp, gmove->aabb, pos, pos );
   if( !t.hit ) {
     if( vec_len( gmove->velocity ) > 1.f ) {
@@ -284,16 +283,25 @@ void gmove_check_stuck( VEC3* in_pos ) {
 
   VEC3 p1 = pos;
   defer( {
-    if( !t.hit ) *in_pos = pos;
+    if( !t.hit ) {
+      *in_pos = pos;
+      gmove_categorize_pos();
+    }
   } );
 
-  for( U32 i = 1; i <= 32; i *= 2 ) {
+  for( i = 1; i <= 32; i *= 2 ) {
     // try nudge away from wall
     pos = p1 + t.normal * BSP_TRACE_EPSILON * (F32)i;
     bsp_trace( &t, gmove->bsp, gmove->aabb, pos, pos );
     if( !t.hit )
       return;
 
+    // try moving up
+    pos = p1 + VEC3{ 0, 0, 2.f } * (F32)i;
+    bsp_trace( &t, gmove->bsp, gmove->aabb, pos, pos );
+    if( !t.hit )
+      return;
+
     // nudge +90deg away horizontal
     pos = p1 + VEC3{ -t.normal.y, t.normal.x, t.normal.z } * (F32)i;
     bsp_trace( &t, gmove->bsp, gmove->aabb, pos, pos );
@@ -312,14 +320,14 @@ void gmove_check_stuck( VEC3* in_pos ) {
     if( !t.hit )
       return;
 
-    pos = p1 + (gmove->unstuck_vel * -1.f) * TICK_INTERVAL * (F32)i;
-    bsp_trace( &t, gmove->bsp, gmove->aabb, pos, pos );
-    if( !t.hit )
-      return;
+    // move back 1 tick
+    if( vec_lensq( gmove->velocity ) > 10.f ) {
+      pos = p1 + vec_normalize( gmove->unstuck_vel * -1.f ) * TICK_INTERVAL * (F32)i;
+      bsp_trace( &t, gmove->bsp, gmove->aabb, pos, pos );
+      if( !t.hit )
+        return;
+    }
   }
-
-  // todo : loop over every dir from current pos and incrementally increase distance.
-  // kinda like source
 }
 
 void gmove_accelerate( VEC3& wishdir, F32 wishspeed, F32 accel ) {
@@ -389,14 +397,14 @@ void gmove_stay_on_ground() {
   end.z -= gmove->pl->stepsize;
 
   bsp_trace( &tr, gmove->bsp, gmove->aabb, start, end );
-  start = tr.point;
+  start = tr.point + BSP_TRACE_EPSILON;
 
   bsp_trace( &tr, gmove->bsp, gmove->aabb, start, end );
   if( tr.frac > 0.f && tr.frac < 1.f && !tr.startsolid && tr.normal.z >= 0.7f ) {
     F32 delta = fabs( gmove->pos.z - tr.point.z );
 
-    if( delta > 0.5f * BSP_TRACE_EPSILON )
-      gmove->pos = tr.point;
+    if( delta > BSP_TRACE_EPSILON )
+      gmove->pos = tr.point + tr.normal * BSP_EDGE_TOLERANCE;
   }
 }
 
@@ -410,6 +418,7 @@ void gmove_step_move( VEC3 dest, BSP_TRACE* tr ) {
   VEC3 upvel = vel, downvel = vel;
 
   gmove_try_move( tr, &down, &downvel );
+  VEC3 downn = tr->normal;
 
   endpos.z += gmove->pl->stepsize + BSP_DIST_EPSILON;
   bsp_trace( tr, gmove->bsp, gmove->aabb, pos, endpos );
@@ -422,8 +431,12 @@ void gmove_step_move( VEC3 dest, BSP_TRACE* tr ) {
   endpos.z -= (gmove->pl->stepsize + BSP_DIST_EPSILON);
 
   bsp_trace( tr, gmove->bsp, gmove->aabb, up, endpos );
+
+  defer( gmove_check_stuck( &gmove->pos ) );
   if( tr->normal.z < 0.7 ) { // not ground, slope
     gmove->pos = down;
+    if( downn.z < 0.99f )
+      gmove->pos += downn * BSP_TRACE_EPSILON * 2.f;
     gmove->velocity = downvel;
     F32 step_dist = gmove->pos.z - pos.z;
     gmove->out_step = step_dist;
@@ -440,12 +453,23 @@ void gmove_step_move( VEC3 dest, BSP_TRACE* tr ) {
   gmove->out_step = gmove->pos.z - pos.z;
   if( downdist > updist ) {
     gmove->pos = down;
+    if( downn.z < 0.99f )
+      gmove->pos += downn * BSP_TRACE_EPSILON * 2.f;
     gmove->velocity = downvel;
   }
   else {
-    gmove->pos = up;
+    VEC3 delta = up - pos;
+    F32 dist = vec_len( delta );
+    F32 speed = vec_len( gmove->velocity ) * TICK_INTERVAL;
+    if( dist > speed ) {
+      for( U32 i = 0; i < 2; ++i )
+        delta[i] *= speed / dist;
+    }
+
+    gmove->pos += delta;
+    if( tr->normal.z < 0.99f )
+      gmove->pos += tr->normal * BSP_TRACE_EPSILON * 2.f;
     gmove->velocity = upvel;
-    return;
   }
 }
 
@@ -469,6 +493,7 @@ void gmove_walk_move() {
   }
 
   gmove_accelerate( wishdir, speed, var_getf( mv_accelerate ) );
+  gmove->velocity[2] = 0;
   speed = vec_len( gmove->velocity );
 
   defer( gmove_check_stuck( &gmove->pos ) );