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godot shaders

Shield impact ripple from a hit point

Show an impact on a spherical shield: a flash at the hit direction and a ring that travels over the sphere along great circles and fades, looping on a timer or driven by a script.

Recorded render of Shield impact ripple from a hit point

What this component contains

  • ATTRIBUTION.md
  • LICENSE
  • README.md
  • component.json
  • demo.tscn
  • inspect_shader.py
  • material.tres
  • preview.png
  • shield_hit_ripple.gdshader
  • test_package.py
  • verification/native.json

How it works

Shader type
spatial
Render modes
unshaded, blend_add, cull_disabled, depth_draw_never, shadows_disabled
Parameters
shield_color (vec4 = 0.25, 0.6, 1, 1), impact_color (vec4 = 1, 0.85, 0.5, 1), hit_azimuth_degrees (float = 25), hit_elevation_degrees (float = 15), impact_progress (float = 0.35), loop_impacts (bool = yes), loop_period (float = 1.5), ring_width (float = 0.12) and 3 more
Use it on
A sphere centred on its origin. To aim at a world hit point, convert it to the object's local direction in a script and set the two angles.
Result
A faint blue bubble with a bright ring spreading out from the impact point.
Renderers
compatibility: compiled and rendered, forward plus: not verified, mobile: not verified
Placement
res://baltor/godot_shaders/shield_hit_ripple/

Recorded checks

godot 4.7.2.stable.official.ed1daf0bf

  • contract_static
  • engine_run
  • engine_log_clean
  • shader_in_scene
  • capture_written
  • render_not_uniform
  • shader_changes_pixels

Limits to consider

One impact at a time; several simultaneous hits need several materials or an array uniform. Directions are taken from vertex positions, so the mesh must be roughly spherical around its origin. Additive, so it cannot darken.