Mapping with Control Points

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Red Faction Modding

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Tutorial: Mapping with Control Points Prepared by Goober.

Control Points are used as objectives in the King of the Hill, Damage Control, and Revolt game types added in Alpine Faction v1.2.

The process to create these is very straightforward.

Basic Setup

1. Create a trigger. This can be a box or a sphere. The only properties of the trigger that matter for control points are the dimensions and the shape.
2. Create a Capture_Point_Handler event (under the AF_Gameplay category).
3. Link the Capture_Point_Handler event to the trigger.

That's the minimum you need to do to make a control point.

If you want a cylindrical control point, tick the Cylindrical Trigger checkbox in the properties for the Capture_Point_Handler.

• If the trigger is a sphere, the cylinder will have the same radius as the sphere.
• If the trigger is a box, the cylinder will have the same diameter as the longest edge of the box.

Label/Progress Sprite

The location of the Capture_Point_Handler event is the location of the progress/label sprite for the control point.

It’s best to position the Capture_Point_Handler:

• Directly above the center of the trigger
• At a height that is unlikely to result in the sprite blocking important sightlines for combat

Event Properties

Capture_Point_Handler Controls the behaviour of a multiplayer control point (capture zone) for King of the Hill, Damage Control, and Revolt. Uses a linked trigger to define the capture area and manages capture progress, ownership, and HUD display. On Response None Off Response None Parameters Name: (str1) Display name for the control point. Outline offset: (float1) Vertical offset for the circular outline drawn on the ground around the capture area. Useful for keeping the outline visible above uneven terrain. Cap rate multiplier: (float2) Multiplier applied to the base capture rate. 0.0 = no multiplier (same as 1.0). Higher values capture faster; values between 0.0 and 1.0 capture slower. Stage: Specify stage for this point. Only used in Revolt. Cylindrical Trigger: If true, treat the linked trigger as a vertical cylinder instead of using its raw shape. For sphere triggers, the cylinder radius matches the sphere radius. For box triggers, the cylinder diameter uses the longest edge of the box.

Advanced Mechanics

Linking to Respawn Points

Link the Capture_Point_Handler to respawn points to let Alpine Faction automatically manage spawn activation and team assignment depending on the gametype.

Behaviour per Gametype

• King of the Hill & Damage Control: Linked respawn points are synced to the owner of the control point. Only that team will be able to spawn at those respawn points. Use of this in KOTH is generally not needed/recommended
• Revolt: Linked respawn points are enabled when their control point’s stage is active, and disabled when the game moves to the next stage. The teams assigned to each respawn point never changes, so you should set the red/blue checkboxes on each respawn point to match the intended defending/attacking team for that stage.
• Escalation: Linked respawn points are enabled when their control point is the current defense hill for that team. The teams assigned to each respawn point never changes, so you should set the red/blue checkboxes on each respawn point to match the intended defending/attacking team for that stage. For example, in a 5-point Escalation map, if red controls their own base, their own forward point, and the center point, while blue only controls their own forward point and their own base, only blue spawn points associated with the blue forward point will be enabled, because that's the point blue is defending; while only red spawn points associated with the center point will be enabled, because that's the point red is defending. The only exception to this rule is when the map first starts and the center point is neutral - in that case, both team's spawns associated with the center point will be enabled until the center point is captured by a team.

Additionally, the Respawn_Point_State and Modify_Respawn_Point events can be used to manually adjust the behaviour of respawn points in all gametypes.

Control Point Events

When_Captured Fires a message to all linked triggers, movers, and events whenever a linked control point is captured by either team. On Response None Off Response None Parameters No additional parameters.

Set_Capture_Point_Owner Forces linked control points to a specific ownership state. Must be run on the server, ignored when run on a client. On Response Set all linked control points to the specified owner. Off Response None Parameters Owner: (int1) Desired owner.

Owner_Gate Tests whether a specific control point has a specified owner. On Response None Off Response None Parameters Handler UID: (int1) UID of the Capture_Point_Handler to test. Required owner: (int2) Owner to check.