mirror of
https://github.com/jcreek/CosmicClash.git
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Josh Creek
70 lines
2.5 KiB
GDScript
70 lines
2.5 KiB
GDScript
class_name HudHeadingTape
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extends HudInstrument
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# Aircraft-style heading tape: a strip of compass ticks slides under a fixed
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# centre marker, with cardinal letters so the player always knows which way
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# they're facing. A dumb display fed by HUDController via set_heading.
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const BG_COLOR := Color(0.05, 0.07, 0.11, 0.55)
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const TICK_COLOR := Color(0.85, 0.92, 1.0, 0.9)
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const MARKER_COLOR := Color(1.0, 0.8, 0.2)
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# Degrees of heading visible across the full tape width.
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const VISIBLE_RANGE := 90.0
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const CARDINALS := {0: "N", 45: "NE", 90: "E", 135: "SE", 180: "S", 225: "SW", 270: "W", 315: "NW"}
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var _target_heading := 0.0
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var _heading := 0.0
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func _ready() -> void:
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clip_contents = true
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func set_heading(heading_deg: float) -> void:
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_target_heading = heading_deg
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# Below this, the tape has visually settled — skip the redraw.
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const REDRAW_EPSILON_DEG := 0.05
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func _process(delta: float) -> void:
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var t := _smoothing_weight(delta)
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var new_heading := fmod(lerp_angle_deg(_heading, _target_heading, t) + 360.0, 360.0)
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var changed := absf(angle_delta_deg(_heading, new_heading)) > REDRAW_EPSILON_DEG
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_heading = new_heading
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if changed:
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queue_redraw()
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func _draw() -> void:
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var font := ThemeDB.fallback_font
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var center_x := size.x / 2.0
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var px_per_deg := size.x / VISIBLE_RANGE
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draw_rect(Rect2(Vector2.ZERO, size), BG_COLOR)
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# Ticks every 5 degrees across the visible window, majors every 15.
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var first := ceili((_heading - VISIBLE_RANGE / 2.0) / 5.0) * 5
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for d in range(first, first + int(VISIBLE_RANGE) + 5, 5):
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var x := center_x + (float(d) - _heading) * px_per_deg
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var shown := wrapi(d, 0, 360)
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var major := shown % 15 == 0
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draw_line(Vector2(x, 0), Vector2(x, 10.0 if major else 5.0), TICK_COLOR, 1.0)
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if major:
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var text: String = CARDINALS.get(shown, str(shown))
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var text_size := font.get_string_size(text, HORIZONTAL_ALIGNMENT_CENTER, -1, 11)
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draw_string(font, Vector2(x - text_size.x / 2.0, 22.0), text,
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HORIZONTAL_ALIGNMENT_CENTER, -1, 11,
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MARKER_COLOR if CARDINALS.has(shown) else TICK_COLOR)
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# Fixed centre marker and numeric readout.
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draw_colored_polygon(PackedVector2Array([
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Vector2(center_x, 12.0), Vector2(center_x - 5, 2.0), Vector2(center_x + 5, 2.0),
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]), MARKER_COLOR)
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var reading := "%03d" % (roundi(_heading) % 360)
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var reading_size := font.get_string_size(reading, HORIZONTAL_ALIGNMENT_CENTER, -1, 13)
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draw_string(font, Vector2(center_x - reading_size.x / 2.0, size.y - 4.0), reading,
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HORIZONTAL_ALIGNMENT_CENTER, -1, 13, MARKER_COLOR)
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