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“ROM hacking athenaeum for all things Samus”

zero_mission:basic_guides:doublehelix

Double Helix Beginner Guide (Incomplete)

Note: This guide was made in reference to “Double Helix version 2.0

Level Editing

This section contains information about Double Helix's (seemingly) most basic function, level editing. This pertains to changing the physical layout of rooms, like adding/removing walls, platforms, lava/acid, missile/super missile/power bomb/energy tanks, etc.

Image layers

Rooms are made up of several layers, which have different properties.

  • BG3 (Background 3) - the background image, appears behind everything. Those green cave walls are in this layer.
  • Background - appears behind everything but the BG3. Those purple rocks are in this layer.
  • Level layer - appears in front of Samus and Enemies. Those blue rocks are in this layer.
  • Foreground - appears in front of everything, and its transparency can be controlled.

Clipdata

Clipdata controls how Samus interacts with each block. Clipdata 10, “Block,” is a block that is solid on all sides. A “fall through” block crumbles when Samus touches the top. Samus can pass through “Air”/“No Block” freely.

Clipdata is independent of the Image layer, so you can assign a “Missile tank” clipdata to a blank tile, resulting in an invisible missile tank.

Header Editor

Sprite Editor

Double Helix has a sprite editing feature, reached through the menu: Tools>Sprite Editor. It has two main functions, modifying enemy palettes, and modifying Enemy Graphics.

zero_mission/basic_guides/doublehelix.txt · Last modified: 2015/06/28 00:58 by raygun