clip velocity when detecting ground

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@11340 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/cl_input.c b/cl_input.c
index fb430089e1f2f54f4e18a24f6f9b86addfd8c28f..c74b4ec0f57ac2fd3e90057cd84bda7be8b8ca9e 100644 (file)
--- a/cl_input.c
+++ b/cl_input.c
@@ -883,6 +883,7 @@ qboolean CL_ClientMovement_Unstick(cl_clientmovement_state_t *s)
 
 void CL_ClientMovement_UpdateStatus(cl_clientmovement_state_t *s)
 {
+       vec_t f;
        vec3_t origin1, origin2;
        trace_t trace;
 
@@ -922,7 +923,17 @@ void CL_ClientMovement_UpdateStatus(cl_clientmovement_state_t *s)
        VectorSet(origin1, s->origin[0], s->origin[1], s->origin[2] + 1);
        VectorSet(origin2, s->origin[0], s->origin[1], s->origin[2] - 1); // -2 causes clientside doublejump bug at above 150fps, raising that to 300fps :)
        trace = CL_TraceBox(origin1, s->mins, s->maxs, origin2, MOVE_NORMAL, NULL, SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_PLAYERCLIP, true, true, NULL, false);
-       s->onground = trace.fraction < 1 && trace.plane.normal[2] > 0.7;
+       if(trace.fraction < 1 && trace.plane.normal[2] > 0.7)
+       {
+               s->onground = true;
+
+               // this code actually "predicts" an impact; so let's clip velocity first
+               f = DotProduct(s->velocity, trace.plane.normal);
+               if(f < 0) // only if moving downwards actually
+                       VectorMA(s->velocity, -f, trace.plane.normal, s->velocity);
+       }
+       else
+               s->onground = false;
 
        // set watertype/waterlevel
        VectorSet(origin1, s->origin[0], s->origin[1], s->origin[2] + s->mins[2] + 1);