makoConstruct

use std::iter::Iterator;

//for hex schemes like this:
//. . x->
// . . .
//  y . .
//   \
//    v

#[derive(Debug)]

makoConstruct

//an easing function that eases in and out by constant acceleration in either direction (parabolic), that allows the user to specify a starting velocty. This allows a user to interrupt the animation partway through and send it in a different direction without any sudden jerks.


fn sq(a:f32)-> f32 { a*a }

//I'm including these because the way the constant acceleration functions handle cases where initial_velocity > 2 doesn't look very good, it overshoots the target, then comes back to it. You will probably prefer to use these linear acceleration-deceleration functions for those cases instead. You might like to use them instead of constant acceleration methods altogether, but I find they look a bit too jerky.
fn linear_acceleration_ease_in_out_with_initial_velocity(t:f32, initial_velocity:f32)-> f32 {
	t*(t*((initial_velocity - 2f32)*t + (3f32 - 2f32*initial_velocity)) + initial_velocity)
}

makoConstruct

precision mediump float;
attribute vec4 a_position;
attribute vec4 a_color;
attribute vec2 a_uv;
attribute vec2 a_angleUnit;
attribute float a_pixelSize;
attribute float a_innerRadius;

uniform mat4 u_projection;
varying vec4 color;

makoConstruct

precision mediump float;

varying vec4 color;
varying vec2 uv;
varying float pixelSize;
varying float innerRadius;
varying vec2 angleUnit;

makoConstruct

const float MemerPower = 2;
struct Memer{ //where p represents the pulse magnitude and delta represents the amount of time that has passed since the last pulse, the Memer sort of remembers the last couple of pulses and how long ago they were. For any consistent p, d, Will arrive at an equilibrium v that is higher if delta is lower and higher if p are higher. And I think- I'm not sure of this but it seems like something like this will hold- I think that for any a,b  p,d  where a/b = p/d, if you keep pulsing (a,b) and (p,d) they'll end up similar?
	float v;
	Memer(float v = 1):v(v){}
	void pulse(float p, float delta){
		float xof = log(v)/log(MemerPower);
		v = pow(MemerPower, xof-delta) + p;
	}
};

makoConstruct

//graph stuff
template<typename T>
struct GraphNode{
	vector<GraphNode*> neighbors;
	T v;
	void unlink(){
		for(GraphNode* neigh : neighbors){
			removeEl(neigh->neighbors, this);
		}
		neighbors.clear();

makoConstruct

Term const* findTermConst(vector<Term> const& candidates, string const& key){
	for(Term const& t : candidates){
		if(t.isList() && t.l.l.size() > 1){
			Term const& ft = t.l.l[0];
			if(ft.isStr() && ft.s.s == key){
				return &t;
			}
		}
	}
	return nullptr;

makoConstruct

void FolkBodySpec::prepAnimation(){
	//start by identifying clusters
	auto groupColorings = fillCopies(itemTrayDimensionX*itemTrayDimensionY, 0);
	u8 nextColoring = 1;
	vector<Coord> centralNode;
	overRegion(itemTrayDimensionX, itemTrayDimensionY, [&](Coord c){
		uint ik = itemOffset(c);
		if(locatedItems[ik]){
			u8 gc;
			if(!groupColorings[ik]){

makoConstruct

float linearAccelerationEaseInOutWithInitialVelocity(float t, float initialVelocity){
	if(t >= 1.0){ return 1.0; }
	return t*(t*((initialVelocity - 2)*t + (3.0f - 2*initialVelocity)) + initialVelocity);
}
float velocityOfLinearAccelerationEaseInOutFromInitialVelocity(float t, float initialVelocity){
	if(t >= 1.0){ return 0.0; }
	return t*((3.0f*initialVelocity - 6.0f)*t + (6.0f - 4.0f*initialVelocity)) + initialVelocity;

makoConstruct

void updateApproacher(v2& currentPosition, v2& currentVelocity, v2 target, float delta, float acceleration, float deceleration, float maxSpeed){
	if(delta == 0) return;
	v2 dto = target - currentPosition;
	float dtm = dto.magnitude();
	float vm = currentVelocity.magnitude();
	auto distanceToStop = [&](float initialVelocity, float deceleration){
		float deltdec = deceleration*delta;
		float numberOfFramesToSlowDown = max(0.0f, floor((initialVelocity - deltdec)/(deltdec)));
		return numberOfFramesToSlowDown*delta*(initialVelocity - (deltdec*(numberOfFramesToSlowDown + 1))/2);
	};