fix engine crash when a polygon was left over and had a texture reference when switch...

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@8523 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/clvm_cmds.c b/clvm_cmds.c
index d3da4299bbd788b2705db84ab8d2685e7efae2d7..656fbc4e1076153f4d5ab3682a12fdd1a2806ec6 100644 (file)
--- a/clvm_cmds.c
+++ b/clvm_cmds.c
@@ -2373,6 +2373,7 @@ typedef struct vmpolygons_s
 {
        mempool_t               *pool;
        qboolean                initialized;
+       double          progstarttime;
 
        int                             max_vertices;
        int                             num_vertices;
@@ -2412,6 +2413,7 @@ void VM_CL_R_RenderScene (void)
        R_RenderView();
 
        polys->num_vertices = polys->num_triangles = 0;
+       polys->progstarttime = prog->starttime;
 }
 
 static void VM_ResizePolygons(vmpolygons_t *polys)
@@ -2463,6 +2465,8 @@ static void VM_DrawPolygonCallback (const entity_render_t *ent, const rtlight_t
 {
        int surfacelistindex;
        vmpolygons_t* polys = vmpolygons + PRVM_GetProgNr();
+       if(polys->progstarttime != prog->starttime) // from other progs? won't draw these (this can cause crashes!)
+               return;
        R_Mesh_ResetTextureState();
        R_Mesh_Matrix(&identitymatrix);
        GL_CullFace(GL_NONE);
@@ -2586,6 +2590,12 @@ void VM_CL_R_PolygonBegin (void)
 
        if (!polys->initialized)
                VM_InitPolygons(polys);
+       if(polys->progstarttime != prog->starttime)
+       {
+               // from another progs? then reset the polys first (fixes crashes on map change, because that can make skinframe textures invalid)
+               polys->num_vertices = polys->num_triangles = 0;
+               polys->progstarttime = prog->starttime;
+       }
        if (polys->begin_active)
        {
                VM_Warning("VM_CL_R_PolygonBegin: called twice without VM_CL_R_PolygonBegin after first\n");