- if(speed.X > 0) // Check for collision with X- plane
- {
- if (relbox.MaxEdge.X <= d) {
- *dtime = -relbox.MaxEdge.X / speed.X;
- if ((relbox.MinEdge.Y + speed.Y * (*dtime) < ysize) &&
- (relbox.MaxEdge.Y + speed.Y * (*dtime) > COLL_ZERO) &&
- (relbox.MinEdge.Z + speed.Z * (*dtime) < zsize) &&
- (relbox.MaxEdge.Z + speed.Z * (*dtime) > COLL_ZERO))
- return 0;
- }
- else if(relbox.MinEdge.X > xsize)
- {
- return -1;
- }
- }
- else if(speed.X < 0) // Check for collision with X+ plane
- {
- if (relbox.MinEdge.X >= xsize - d) {
- *dtime = (xsize - relbox.MinEdge.X) / speed.X;
- if ((relbox.MinEdge.Y + speed.Y * (*dtime) < ysize) &&
- (relbox.MaxEdge.Y + speed.Y * (*dtime) > COLL_ZERO) &&
- (relbox.MinEdge.Z + speed.Z * (*dtime) < zsize) &&
- (relbox.MaxEdge.Z + speed.Z * (*dtime) > COLL_ZERO))
- return 0;
+ const f32 dtime_max = *dtime;
+ f32 inner_margin; // the distance of clipping recovery
+ f32 distance;
+ f32 time;
+
+
+ if (speed.Y) {
+ distance = relbox.MaxEdge.Y - relbox.MinEdge.Y;
+ *dtime = distance / std::abs(speed.Y);
+ time = std::max(*dtime, 0.0f);
+
+ if (*dtime <= dtime_max) {
+ inner_margin = std::max(-0.5f * (staticbox.MaxEdge.Y - staticbox.MinEdge.Y), -2.0f);
+
+ if ((speed.Y > 0 && staticbox.MinEdge.Y - movingbox.MaxEdge.Y > inner_margin) ||
+ (speed.Y < 0 && movingbox.MinEdge.Y - staticbox.MaxEdge.Y > inner_margin)) {
+ if (
+ (std::max(movingbox.MaxEdge.X + speed.X * time, staticbox.MaxEdge.X)
+ - std::min(movingbox.MinEdge.X + speed.X * time, staticbox.MinEdge.X)
+ - relbox.MinEdge.X < 0) &&
+ (std::max(movingbox.MaxEdge.Z + speed.Z * time, staticbox.MaxEdge.Z)
+ - std::min(movingbox.MinEdge.Z + speed.Z * time, staticbox.MinEdge.Z)
+ - relbox.MinEdge.Z < 0)
+ )
+ return COLLISION_AXIS_Y;
+ }