RichardEllicott

    // ported C# to Godot C++: "Coding Adventure: Hydraulic Erosion" by Sebastian Lague
    class SebastionErosion {
       public:
        struct HeightAndGradient {
           public:
            float height;
            float gradientX;
            float gradientY;
        };

RichardEllicott

"""
"""
@tool

extends Node2D

var particles: Array[RID] = [] ## particle RIDS

@export var particle_radius: float = 5.0

RichardEllicott

"""
"""
@tool

extends Node2D

var particles: Array[RID] = [] ## particle RIDS

@export var particle_radius: float = 5.0

RichardEllicott

"""
corrects flaws from:
    https://docs.godotengine.org/en/stable/classes/class_audiostreamgenerator.html

"""
@tool
extends Node

var playback: AudioStreamGeneratorPlayback # Will hold the AudioStreamGeneratorPlayback.
@onready var sample_hz: float = $AudioStreamPlayer.stream.mix_rate

RichardEllicott

using Godot;
using System;





// try this:
// https://graphics.stanford.edu/~mdfisher/Code/MarchingCubes/MarchingCubes.cpp   ??? same port issue back to first?

RichardEllicott

## using chat gp, asked for python (this gives an egg shape wtf?)

## https://chat.openai.com/c/0269574d-acb5-4f88-ac65-0a2c27e016df
static func get_keppler_position(semi_major_axis: float = 8.0, eccentricity: float = 0.9, theta: float = 0.0) -> Vector3:
    
    var semi_minor_axis: float = semi_major_axis * sqrt(1.0 - eccentricity**2) # Calculate the semi-minor axis
    var pos: Vector3 = Vector3(semi_major_axis * cos(theta), 0.0, semi_minor_axis * sin(theta))
    var rotation_angle = atan2(pos.z, pos.x)
    ## this but from chat gp, it doesn't seem a pure rotation, it seems to transform the parametric to keppler
    pos = Vector3( 

RichardEllicott

import matplotlib.pyplot as plt
import numpy as np

def plot_kepler_orbit(semi_major_axis, eccentricity, num_points=1000):
    # Calculate the semi-minor axis
    semi_minor_axis = semi_major_axis * np.sqrt(1 - eccentricity**2)
    
    # Generate theta values (angle from the positive x-axis)
    theta = np.linspace(0, 2*np.pi, num_points)
    

RichardEllicott

## get existing or create new child node, works in tool mode to show in editor
static func get_or_create_child(_parent, _name, type = Node3D) -> Node:
    var child = _parent.get_node_or_null(_name)
    if not child:
        child = type.new()
        child.name = _name
        _parent.add_child(child)
        if Engine.is_editor_hint(): # if in editor we need to do this to show in editor
            child.set_owner(_parent.get_tree().edited_scene_root) # new, allows static
    return child

RichardEllicott

# function that takes array of Vector3, returns a spline between them (as a Curve3D)

static func spline_positions_to_curve(marker_positions: Array, curve_strength: float) -> Curve3D:
    
    var curve3D: Curve3D = Curve3D.new()

    for i in marker_positions.size():
        
        var pos = marker_positions[i] # curve pos

RichardEllicott

"""

FINISHED 03/12/2022

HUGE drag drop modue, supports dragging cards about and throws signals

if set to check depth as 1, stacks of cards will become one object, no bugs!
check depth 2 allows dragging cards out of packs, is buggy still