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ws2812-achterbahn/achterbahn.ino

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C++
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#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>
#endif
#include <vector>
#include "wagon.h"
#define PIN D2
#define NUMPIXELS 600
Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
long lastPixelUpdate=0;
#define PIXELUPDATETIME 20
long lastRoutineUpdate=0;
#define ROUTINEUPDATETIME 20
long lastCheckspawn=0;
#define CHECKSPAWNDELAY 4000 //delay in ms to check random spawn
#define SPAWNCHANCE 20 //1 out of x times wagon will spawn
#define SPAWNCHANCEDOUBLE 5 //change of spawning a two trains simultaneously
long loopmillis=0;
uint8_t height[NUMPIXELS];
uint8_t heightraw[NUMPIXELS]; //uninterpolated values
#define MAXHEIGHT 254
std::vector <Wagon> wagon_arr;
uint8_t maxid=0;
bool configmode=false;
int selectedpixel=-1; //-1 = none
uint8_t wagoncount=0;
//define config
//#define RESPAWNWAGON
#define MAXWAGONS 5 //maximum number of wagons
void setup() {
Serial.begin(115200);
strip.begin();
strip.setBrightness(150);
strip.show(); // Initialize all pixels to 'off'
Serial.println("Started");
resetHeightmap();
//fixed heightmap
heightraw[0]=254;
heightraw[43]=254;
heightraw[69]=200;
heightraw[95]=149;
heightraw[114]=132;
heightraw[137]=128;
heightraw[195]=128;
heightraw[226]=150;
heightraw[276]=139;
heightraw[303]=150;
heightraw[337]=131;
heightraw[354]=129;
heightraw[368]=131;
heightraw[405]=172;
heightraw[419]=147;
heightraw[435]=117;
heightraw[446]=105;
heightraw[458]=96;
heightraw[472]=77;
heightraw[503]=35;
heightraw[523]=0;
heightraw[554]=0;
heightraw[562]=8;
heightraw[577]=34;
heightraw[599]=67;
interpolateHeightValues();
/*
Serial.println();
for (int i=0;i<NUMPIXELS;i++){
Serial.print(i);
Serial.print(": ");
Serial.println(height[i]);
}*/
//previewHeightmap(2000);
//spawnWagon();
//spawnWagon();
}
void resetHeightmap(){
for (int i=0;i<NUMPIXELS;i++){
heightraw[i]=255; //255 means value need to be interpolated
}
heightraw[0]=0;
heightraw[NUMPIXELS-1]=0;
}
void printHeightmapRaw() {
Serial.println();
for (int i=0;i<NUMPIXELS;i++){
if (heightraw[i]!=255){
Serial.print("heightraw[");
Serial.print(i);
Serial.print("]=");
Serial.print(heightraw[i]);
Serial.println(";");
}
}
}
void interpolateHeightValues(){
for (int i=0;i<NUMPIXELS;i++){ //copy heightraw to height
height[i]=heightraw[i];
}
//interpolate every part with height value 255
for (int interpolateStartpos=0;interpolateStartpos<NUMPIXELS-1;interpolateStartpos++){
if (height[interpolateStartpos]==255){ //interpolation part starts
int interpolateEndpos=interpolateStartpos+1;
while (interpolateEndpos<NUMPIXELS && height[interpolateEndpos]==255){
interpolateEndpos++;
}
interpolateEndpos--;
//interpolateStartpos index of first 255 value
//interpolateEndpos index of last 255 value
uint8_t interpolateStartvalue=height[interpolateStartpos-1];
uint8_t interpolateEndvalue=height[interpolateEndpos+1];
int interpolateLength=interpolateEndpos-interpolateStartpos+1; //one 255 element -> length 1
float interpolateStep= ((int)(interpolateEndvalue)-(int)(interpolateStartvalue))*1.0 /(interpolateLength+1);
Serial.println();
Serial.print("interpolateStep=");
Serial.print("(");
Serial.print(interpolateEndvalue);
Serial.print("-");
Serial.print(interpolateStartvalue);
Serial.print(")/");
Serial.print(interpolateLength+1);
Serial.print("=");
Serial.println(interpolateStep);
int interpolateStepCounter=1;
Serial.println();
Serial.print("interpolateStartpos=");
Serial.println(interpolateStartpos);
Serial.print("interpolateEndpos=");
Serial.println(interpolateEndpos);
Serial.print("interpolateStartvalue=");
Serial.println(interpolateStartvalue);
Serial.print("interpolateEndvalue=");
Serial.println(interpolateEndvalue);
Serial.print("interpolateLength=");
Serial.println(interpolateLength);
Serial.print("interpolateStep=");
Serial.println(interpolateStep,6);
for (int setinti=interpolateStartpos;setinti<=interpolateEndpos;setinti++) { //for all coherent elements to interpolate
height[setinti]=height[interpolateStartpos-1]+(int)(interpolateStep*interpolateStepCounter);
/*Serial.print(height[interpolateStartpos-1]);
Serial.print("+(");
Serial.print(interpolateStep);
Serial.print("*");
Serial.print(interpolateStepCounter);
Serial.print(")=");
Serial.println(height[setinti]);*/
interpolateStepCounter++;
}
interpolateStartpos=interpolateEndpos;
}
}
}
void previewHeightmap(int waittime){
for (int i=0;i<NUMPIXELS;i++){
//uint32_t c=Wheel(height[i]*255/45);
uint8_t b=height[i]*255.0/MAXHEIGHT;
//uint32_t c=strip.Color(255-b,b,0);
uint32_t c=Wheel(b/1.2);
if (height[i]==255){
c=strip.Color(0,0,0);
}
strip.setPixelColor(i,c);
}
if (waittime>0){
strip.show();
delay(waittime);
}
}
void spawnWagon(){
//Wagon tmpr = Wagon(maxid++,NUMPIXELS,&strip, height, 35, 6, 0.5,0); //spawn new wagon
// pos, wagonlength, startvel, startacc, trainmass, wagoncolor
//Wagon tmpr = Wagon(maxid++,NUMPIXELS,&strip, height, random(0, 20), random(3,20), random(0.2, 50)/10.0, 0 , random(5,100) , Wheel(random(0,256))); //spawn new wagon
Wagon tmpr = Wagon(maxid++,NUMPIXELS,&strip, height, random(0, 20), random(3,40), random(1, 70)/10.0, 0 , random(50,200) , Wheel(random(0,256))); //spawn new wagon
wagon_arr.push_back(tmpr);
Serial.println("Spawned Wagon");
}
void spawnWagon(float pos, float wagonlength,float startvel, float startacc, float mass, uint8_t wheelcolor){
//Wagon tmpr = Wagon(maxid++,NUMPIXELS,&strip, height, 35, 6, 0.5,0); //spawn new wagon
// pos, wagonlength, startvel, startacc, wagonmass, wagoncolor
Wagon tmpr = Wagon(maxid++,NUMPIXELS,&strip, height, pos, wagonlength, startvel, startacc , mass , Wheel(wheelcolor)); //spawn new wagon
wagon_arr.push_back(tmpr);
Serial.println("Spawned Custom Wagon");
}
void loop() {
loopmillis=millis();
checkSerial();
if (configmode){
loop_configmode();
}else{
loop_achterbahn();
}
}
void checkSerial(){
static String serialstring_temp="";
String serialstring="";
while(Serial.available()){
if (Serial.available()>0){
char c = Serial.read();
if (c!='\n') {
serialstring_temp+=c;
Serial.print(c); //echo
}else{
Serial.println(""); //new line
serialstring=serialstring_temp;
serialstring_temp="";
}
}
}
if (serialstring.length()>0) {
Serial.println("String:"+serialstring);
if (serialstring.equals("run")){
configmode=false;
}else if (serialstring.equals("debug")){
configmode=true;
}else if (serialstring.equals("print")){
printHeightmapRaw();
}else if (serialstring.equals("remove")){
removeAllWagons();
}else if (serialstring.equals("clear")){
resetHeightmap();
interpolateHeightValues();
previewHeightmap(0); //show heightmap
strip.show();
}else if (serialstring.startsWith("spawn=")){
String rest=serialstring.substring(serialstring.indexOf('=')+1); //part after =
int spawnpos=rest.substring(0,rest.indexOf(',')).toInt(); //part to next ,
rest=rest.substring(rest.indexOf(',')+1); //part after ,
int spawnlength=rest.substring(0,rest.indexOf(',')).toInt(); //part to next ,
rest=rest.substring(rest.indexOf(',')+1); //part after ,
int spawnstartvel=rest.substring(0,rest.indexOf(',')).toInt(); //part to next ,
rest=rest.substring(rest.indexOf(',')+1); //part after ,
int spawnstartacc=rest.substring(0,rest.indexOf(',')).toInt(); //part to next ,
rest=rest.substring(rest.indexOf(',')+1); //part after ,
int spawnmass=rest.substring(0,rest.indexOf(',')).toInt(); //part to next ,
rest=rest.substring(rest.indexOf(',')+1); //part after ,
int spawncolor=rest.substring(0).toInt(); //part to next ,
Serial.print("spawning ");
Serial.print(spawnpos);
Serial.print(",");
Serial.println(spawnlength);
Serial.print(",");
Serial.println(spawnstartvel); //startvel will be /10
Serial.print(",");
Serial.println(spawnstartacc); //startacc will be /10
Serial.print(",");
Serial.println(spawnmass);
Serial.print(",");
Serial.println(spawncolor);
spawnWagon(spawnpos,spawnlength,spawnstartvel/10.0,spawnstartacc/10.0,spawnmass,spawncolor);
}else if (serialstring.equals("spawn")){
spawnWagon(); //random
}else if (serialstring.startsWith("setpx=")){
String pixelnumberstring=serialstring.substring(serialstring.indexOf('=')+1,serialstring.indexOf(',')); //part between = and ,
String pixelvaluestring=serialstring.substring(serialstring.indexOf(',')+1); //part after ,
int pixelnumber=pixelnumberstring.toInt();
int pixelvalue=pixelvaluestring.toInt();
Serial.print("set pixel ");
Serial.print(pixelnumber);
Serial.print("=");
Serial.println(pixelvalue);
if (pixelnumber>=0 && pixelnumber<NUMPIXELS && pixelvalue>=0 && pixelvalue<=255){
heightraw[pixelnumber]=pixelvalue;
}else{
Serial.println("Error: Value out of range!");
}
interpolateHeightValues();
Serial.println();
for (int i=0;i<NUMPIXELS;i++){
Serial.print(i);
Serial.print(": ");
Serial.print(height[i]);
Serial.print(" (");
Serial.print(heightraw[i]);
Serial.println(")");
}
previewHeightmap(0); //show heightmap
strip.show();
}else if (serialstring.startsWith("px=")){
String pixelnumberstring=serialstring.substring(serialstring.indexOf('=')+1); //part between = and ,
int pixelnumber=pixelnumberstring.toInt();
Serial.print("show pixel ");
Serial.print(pixelnumber);
if (pixelnumber<NUMPIXELS){
selectedpixel=pixelnumber;
}else{
Serial.println("Error: Value too high!");
}
}
}
}
void loop_configmode(){
if (lastPixelUpdate+PIXELUPDATETIME<loopmillis){
lastPixelUpdate=loopmillis;
previewHeightmap(0);
if (selectedpixel>=0){
uint32_t c=strip.Color(255,255,255);
strip.setPixelColor(selectedpixel,c);
if (selectedpixel>=1){
uint32_t c=strip.Color(0,0,0);
strip.setPixelColor(selectedpixel-1,c);
}
if (selectedpixel<NUMPIXELS-1){
uint32_t c=strip.Color(0,0,0);
strip.setPixelColor(selectedpixel+1,c);
}
}
strip.show();
}
}
void loop_achterbahn(){
//######################### Update LED Output
if (lastPixelUpdate+PIXELUPDATETIME<loopmillis){
lastPixelUpdate=loopmillis;
for (int i=0;i<NUMPIXELS;i++){ //all black
uint32_t c=strip.Color(0,0,0);
strip.setPixelColor(i,c);
}
for (std::vector<Wagon>::iterator it = wagon_arr.begin(); it != wagon_arr.end(); ++it) //all wagons
{
Wagon & w = *it;
w.updateGraphics();
}
strip.show();
}
if (lastRoutineUpdate+ROUTINEUPDATETIME<loopmillis-ROUTINEUPDATETIME){
Serial.println("Behind!");
}
//######################### Update Physics
if (lastRoutineUpdate+ROUTINEUPDATETIME<loopmillis){
lastRoutineUpdate=loopmillis;
wagoncount=0;
for (std::vector<Wagon>::iterator it = wagon_arr.begin(); it != wagon_arr.end(); ++it) //all wagons
{
Wagon & w = *it;
w.updatePhysics(ROUTINEUPDATETIME);
if (!w.alive())
{
it = wagon_arr.erase(it); // After erasing, it is now pointing the next element.
--it;
#ifdef RESPAWNWAGON
spawnWagon(); //spawn new one
#endif
}else{ //wagon is alive
wagoncount++;
}
}
}
//Check spawning
if (lastCheckspawn+CHECKSPAWNDELAY<loopmillis) {
lastCheckspawn=loopmillis;
Serial.print("Checking Spawning, wagons ");
Serial.println(wagoncount);
if (random(0,SPAWNCHANCE)==0 && wagoncount<MAXWAGONS) { //by chance, exclusive SPAWNCHANCE
spawnWagon();
if (random(0,SPAWNCHANCEDOUBLE)==0){
spawnWagon();
}
}else{
Serial.println("no spawn");
}
}
}
void removeAllWagons(){
for (std::vector<Wagon>::iterator it = wagon_arr.begin(); it != wagon_arr.end(); ++it) //all wagons
{
Wagon & w = *it;
w.updatePhysics(ROUTINEUPDATETIME);
it = wagon_arr.erase(it); // After erasing, it is now pointing the next element.
--it;
}
}
// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
WheelPos = 255 - WheelPos;
if(WheelPos < 85) {
return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
}
if(WheelPos < 170) {
WheelPos -= 85;
return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
}
WheelPos -= 170;
return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}
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