Add lighting overlay.

[neitsa]

Summary

SUMMARY: Features "Add lighting overlay (debug menu)"

Purpose of change

Add lighting overlay for various lighting conditions.

• Add global lighting overlay (basically what are the final lighting conditions the player sees).
• Add lighting contributions (player / ambient / cached / etc.)
  • to be refined. Thanks to @KurzedMetal for the ideas!

Describe the solution

• Global lighting (that is, what is the lighting the player sees). Numbers on each tile indicate the lightning condition as calculated by the game:
  • 1.0: fully light.
  • 11.0: completely dark.

Goes from pure white (fully illuminated) to pure blue (complete dark):

• Refactored code for toggling the various overlays. Since you have to flip a boolean (and flip all other overlays to off), it became difficult to toggle off/on all the overlays. Added two functions: the first one (display_toggle_overlay) toggle the required overlay to on/off and all the others to off; the other function (display_overlay_state) get the state of an overlay (on/off).

Describe alternatives you've considered

N/A.

Additional context

I like heatmaps going from blue to red (aka “rainbow” scale) but according to some people (1, 2) they might be difficult to read due to how we perceive colors. I decided to switch from white to blue instead.

[Night-Pryanik]

This thing looks good even for the game itself, debug menu could only show numbers.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

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