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@marinho
Created November 14, 2023 12:20
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Code to leave an ink print on ground as the player moves
using Godot;
using System.Linq;
using System.Collections.Generic;
using Isometric3DEngine;
public partial class InkCanvas : Node3D
{
[Export]
public int MaximumAmountOfDrops = 100;
[Export]
public Sprite3D InkDropSprite;
[Export]
public Sprite3D InkSplashSprite;
[Export]
public float InkDropDistance = 0.1f;
[Export]
public float InkDropDistanceWhenEnding = 0.2f;
[Export]
public Vector3 PositionOffset = Vector3.Zero;
[Export]
public float InkDropScale = 1.0f;
[ExportGroup("Random")]
[Export]
public Vector3 RandomRotation = Vector3.Zero;
[Export]
public Vector3 RandomScale = Vector3.Zero;
[Export]
public Vector3 RandomOffset = Vector3.Zero;
[Export]
public float RandomAlpha = 0f;
List<Sprite3D> InkDrops;
ColorPalette _ColorPalette = (ColorPalette)
ResourceLoader.Load("res://resources/color_palette.tres");
// method that runs when the node is ready
public override void _Ready()
{
InkDrops = new List<Sprite3D>();
}
public bool InkDrop(Vector3 position, bool isEnding, ColorPaletteChoices inkColorChoice)
{
if (HasInkAtPosition(position, isEnding))
return false;
var sprite = GetInkSprite();
Color inkColor = _ColorPalette.GetColor(inkColorChoice);
ApplyInkSprite(sprite, position, inkColor, InkDropSprite);
return true;
}
public bool InkSplash(Vector3 position, ColorPaletteChoices inkColorChoice)
{
var sprite = GetInkSprite();
Color inkColor = _ColorPalette.GetColor(inkColorChoice);
ApplyInkSprite(sprite, position, inkColor, InkSplashSprite);
return true;
}
void ApplyInkSprite(Sprite3D sprite, Vector3 position, Color inkColor, Sprite3D spriteToCopy)
{
sprite.Texture = spriteToCopy.Texture;
sprite.Modulate = new Color(
inkColor.R,
inkColor.G,
inkColor.B,
(float)GD.RandRange(inkColor.A - RandomAlpha, inkColor.A)
);
sprite.Transform = new Transform3D(Basis.Identity, Vector3.Zero);
sprite.GlobalPosition = RandomizePosition(position);
sprite.Rotation = RandomizeRotation(spriteToCopy.Rotation);
sprite.Scale = RandomizeScale(spriteToCopy.Scale * InkDropScale);
sprite.Visible = true;
}
Vector3 RandomizePosition(Vector3 position)
{
var randomPosition = new Vector3(
position.X + (float)GD.RandRange(-RandomOffset.X, RandomOffset.X),
position.Y + (float)GD.RandRange(-RandomOffset.Y, RandomOffset.Y),
position.Z + (float)GD.RandRange(-RandomOffset.Z, RandomOffset.Z)
);
return randomPosition + PositionOffset;
}
Vector3 RandomizeRotation(Vector3 rotation)
{
return new Vector3(
rotation.X + (float)GD.RandRange(-RandomRotation.X, RandomRotation.X),
rotation.Y + (float)GD.RandRange(-RandomRotation.Y, RandomRotation.Y),
rotation.Z + (float)GD.RandRange(-RandomRotation.Z, RandomRotation.Z)
);
}
Vector3 RandomizeScale(Vector3 scale)
{
return new Vector3(
scale.X + (float)GD.RandRange(-RandomScale.X, RandomScale.X),
scale.Y + (float)GD.RandRange(-RandomScale.Y, RandomScale.Y),
scale.Z + (float)GD.RandRange(-RandomScale.Z, RandomScale.Z)
);
}
private Sprite3D GetInkSprite()
{
Sprite3D result;
if (InkDrops.Count >= MaximumAmountOfDrops)
{
result = InkDrops[0];
InkDrops.RemoveAt(0);
}
else
{
result = new Sprite3D();
AddChild(result);
}
InkDrops.Add(result);
result.Visible = false;
return result;
}
private bool HasInkAtPosition(Vector3 position, bool inkIsEnding)
{
float dropDistance = inkIsEnding ? InkDropDistanceWhenEnding : InkDropDistance;
// get the number of children in InkParentPath that are positioned at the same X and Z as the player, with a radius of 0.5
var spritesWithinRadius = InkDrops
.Where(child => child is Sprite3D && child.Visible)
.Select(child => (Sprite3D)child)
.Where(
child =>
child is Sprite3D && child.GlobalPosition.DistanceTo(position) < dropDistance
);
// if there are more than 0 children, return
return spritesWithinRadius.Count() > 0;
}
}
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