plish

[carveJwlIkooP6JGAAIwe30JlM.git] / world_gate.h

diff --git a/world_gate.h b/world_gate.h
index 3e35081e2b1c72639bfa510a9196eb4da04fc706..1bf8afef0c4584d294bbe044780fbbd4485759d3 100644 (file)
--- a/world_gate.h
+++ b/world_gate.h
@@ -52,7 +52,11 @@ VG_STATIC int render_gate( teleport_gate *gate, camera *cam )
 
    v3f v0;
    v3_sub( cam->pos, gate->co[0], v0 );
-   if( v3_dot(v0, gatedir) >= 0.0f )
+
+   float dist = v3_dot(v0, gatedir);
+
+   /* Hard cutoff */
+   if( dist > 3.0f )
       return 0;
 
    if( v3_dist( cam->pos, gate->co[0] ) > 100.0f )
@@ -80,7 +84,7 @@ VG_STATIC int render_gate( teleport_gate *gate, camera *cam )
    static camera gate_view;
    gate_view.fov = cam->fov;
    gate_view.nearz = 0.1f;
-   gate_view.farz  = 900.0f;
+   gate_view.farz  = 2000.0f;
 
    m4x3_mul( gate->transport, cam->transform, gate_view.transform );
    camera_update_view( &gate_view );
@@ -93,7 +97,9 @@ VG_STATIC int render_gate( teleport_gate *gate, camera *cam )
    
    m4x3_mulp( gate_view.transform_inverse, surface, surface );
    surface[3] = -fabsf(surface[3]);
-   m4x4_clip_projection( gate_view.mtx.p, surface );
+
+   if( dist < -0.5f )
+      m4x4_clip_projection( gate_view.mtx.p, surface );
 
    /* Ready to draw with new camrea */
    camera_finalize( &gate_view );
@@ -146,7 +152,8 @@ VG_STATIC int render_gate( teleport_gate *gate, camera *cam )
    return 1;
 }
 
-VG_STATIC int gate_intersect( teleport_gate *gate, v3f pos, v3f last )
+VG_STATIC int gate_intersect_plane( teleport_gate *gate, v3f pos, v3f last,
+                                    v2f where )
 {
    v4f surface;
    m3x3_mulv( gate->to_world, (v3f){0.0f,0.0f,-1.0f}, surface );
@@ -179,16 +186,46 @@ VG_STATIC int gate_intersect( teleport_gate *gate, v3f pos, v3f last )
          m3x3_mulv( gate->to_world, (v3f){0.0f,1.0f,0.0f}, vup );
          m3x3_mulv( gate->to_world, (v3f){1.0f,0.0f,0.0f}, vside );
 
-         v2f xy = { v3_dot( rel, vside ), v3_dot( rel, vup ) };
+         where[0] = v3_dot( rel, vside );
+         where[1] = v3_dot( rel, vup );
 
-         if( fabsf(xy[0]) <= gate->dims[0] && fabsf(xy[1]) <= gate->dims[1] )
-         {
-            return 1;
-         }
+         return 1;
       }
    }
 
    return 0;
 }
 
+VG_STATIC int gate_intersect( teleport_gate *gate, v3f pos, v3f last )
+{
+   v2f xy;
+
+   if( gate_intersect_plane( gate, pos, last, xy ) )
+   {
+      if( fabsf(xy[0]) <= gate->dims[0] && fabsf(xy[1]) <= gate->dims[1] )
+      {
+         return 1;
+      }
+   }
+
+   return 0;
+}
+
+/* 
+ * Intersect all gates in the world
+ */
+VG_STATIC teleport_gate *world_intersect_gates( v3f pos, v3f last )
+{
+   for( int i=0; i<world.gate_count; i++ )
+   {
+      struct route_gate *rg = &world.gates[i];
+      teleport_gate *gate = &rg->gate;
+
+      if( gate_intersect( gate, pos, last ) )
+         return gate;
+   }
+
+   return NULL;
+}
+
 #endif /* WORLD_GATE_H */