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-rw-r--r--src/Entities/Minecart.cpp94
1 files changed, 92 insertions, 2 deletions
diff --git a/src/Entities/Minecart.cpp b/src/Entities/Minecart.cpp
index d4eadc5d5..21c58fdba 100644
--- a/src/Entities/Minecart.cpp
+++ b/src/Entities/Minecart.cpp
@@ -871,11 +871,101 @@ bool cMinecart::TestEntityCollision(NIBBLETYPE a_RailMeta)
return true;
}
case E_META_RAIL_CURVED_ZM_XM:
+ case E_META_RAIL_CURVED_ZP_XP:
+ {
+ Vector3d Distance = MinecartCollisionCallback.GetCollidedEntityPosition() - Vector3d(GetPosX(), 0, GetPosZ());
+
+ // Prevent division by small numbers
+ if (abs(Distance.z) < 0.001)
+ {
+ Distance.z = 0.001;
+ }
+
+ /* Check to which side the minecart is to be pushed.
+ Let's consider a z-x-coordinate system where the minecart is the center (0/0).
+ The minecart moves along the line x = -z, the perpendicular line to this is x = z.
+ In order to decide to which side the minecart is to be pushed, it must be checked on what side of the perpendicular line the pushing entity is located. */
+ if (
+ ((Distance.z > 0) && ((Distance.x / Distance.z) >= 1)) ||
+ ((Distance.z < 0) && ((Distance.x / Distance.z) <= 1))
+ )
+ {
+ // Moving -X +Z
+ if ((-GetSpeedX() * 0.4 / sqrt(2)) < 0.01)
+ {
+ // ~ SpeedX >= 0 Immobile or not moving in the "right" direction. Give it a bump!
+ AddSpeedX(-4 / sqrt(2));
+ AddSpeedZ(4 / sqrt(2));
+ }
+ else
+ {
+ // ~ SpeedX < 0 Moving in the "right" direction. Only accelerate it a bit.
+ SetSpeedX(GetSpeedX() * 0.4 / sqrt(2));
+ SetSpeedZ(GetSpeedZ() * 0.4 / sqrt(2));
+ }
+ }
+ else if ((GetSpeedX() * 0.4 / sqrt(2)) < 0.01)
+ {
+ // Moving +X -Z
+ // ~ SpeedX <= 0 Immobile or not moving in the "right" direction
+ AddSpeedX(4 / sqrt(2));
+ AddSpeedZ(-4 / sqrt(2));
+ }
+ else
+ {
+ // ~ SpeedX > 0 Moving in the "right" direction
+ SetSpeedX(GetSpeedX() * 0.4 / sqrt(2));
+ SetSpeedZ(GetSpeedZ() * 0.4 / sqrt(2));
+ }
+ break;
+ }
case E_META_RAIL_CURVED_ZM_XP:
case E_META_RAIL_CURVED_ZP_XM:
- case E_META_RAIL_CURVED_ZP_XP:
{
- // TODO - simply can't be bothered right now
+ Vector3d Distance = MinecartCollisionCallback.GetCollidedEntityPosition() - Vector3d(GetPosX(), 0, GetPosZ());
+
+ // Prevent division by small numbers
+ if (abs(Distance.z) < 0.001)
+ {
+ Distance.z = 0.001;
+ }
+
+ /* Check to which side the minecart is to be pushed.
+ Let's consider a z-x-coordinate system where the minecart is the center (0/0).
+ The minecart moves along the line x = z, the perpendicular line to this is x = -z.
+ In order to decide to which side the minecart is to be pushed, it must be checked on what side of the perpendicular line the pushing entity is located. */
+ if (
+ ((Distance.z > 0) && ((Distance.x / Distance.z) <= -1)) ||
+ ((Distance.z < 0) && ((Distance.x / Distance.z) >= -1))
+ )
+ {
+ // Moving +X +Z
+ if ((GetSpeedX() * 0.4) < 0.01)
+ {
+ // ~ SpeedX <= 0 Immobile or not moving in the "right" direction
+ AddSpeedX(4 / sqrt(2));
+ AddSpeedZ(4 / sqrt(2));
+ }
+ else
+ {
+ // ~ SpeedX > 0 Moving in the "right" direction
+ SetSpeedX(GetSpeedX() * 0.4 / sqrt(2));
+ SetSpeedZ(GetSpeedZ() * 0.4 / sqrt(2));
+ }
+ }
+ else if ((-GetSpeedX() * 0.4) < 0.01)
+ {
+ // Moving -X -Z
+ // ~ SpeedX >= 0 Immobile or not moving in the "right" direction
+ AddSpeedX(-4 / sqrt(2));
+ AddSpeedZ(-4 / sqrt(2));
+ }
+ else
+ {
+ // ~ SpeedX < 0 Moving in the "right" direction
+ SetSpeedX(GetSpeedX() * 0.4 / sqrt(2));
+ SetSpeedZ(GetSpeedZ() * 0.4 / sqrt(2));
+ }
break;
}
default: break;