From def486e7a7596ab4ddc0c8efbbe6a4960cca001a Mon Sep 17 00:00:00 2001
From: Felix Pankratz <mail@felixpankratz.de>
Date: Fri, 27 Dec 2024 16:58:55 +0100
Subject: [PATCH] flamezz

---
 nametag/src/enums.h   |  4 +-
 nametag/src/flame.cpp | 85 +++++++++++++++++++++++++++++++++++++++++++
 nametag/src/flame.h   |  4 ++
 nametag/src/main.cpp  | 20 +++++++++-
 4 files changed, 110 insertions(+), 3 deletions(-)
 create mode 100644 nametag/src/flame.cpp
 create mode 100644 nametag/src/flame.h

diff --git a/nametag/src/enums.h b/nametag/src/enums.h
index fb5eeba..61a856e 100644
--- a/nametag/src/enums.h
+++ b/nametag/src/enums.h
@@ -11,6 +11,8 @@ enum DisplayStyle {
   Congress,
   Supercomputer,
   Cyber,
-  Plasma
+  Plasma,
+  Flame,
+  NumStyles
 };
 #endif
diff --git a/nametag/src/flame.cpp b/nametag/src/flame.cpp
new file mode 100644
index 0000000..07476f4
--- /dev/null
+++ b/nametag/src/flame.cpp
@@ -0,0 +1,85 @@
+#include "constants.h"
+#include "flame.h"
+
+#define FLAME_PALETTE_SIZE 36
+
+uint16_t flame_palette[] = {
+    0x0020,
+    0x1820,
+    0x2860,
+    0x4060,
+    0x50A0,
+    0x60E0,
+    0x70E0,
+    0x8920,
+    0x9960,
+    0xA9E0,
+    0xBA20,
+    0xC220,
+    0xDA60,
+    0xDAA0,
+    0xDAA0,
+    0xD2E0,
+    0xD321,
+    0xCB61,
+    0xCBA1,
+    0xCBE1,
+    0xCC23,
+    0xC422,
+    0xC462,
+    0xC4A3,
+    0xBCE3,
+    0xBCE3,
+    0xBD24,
+    0xBD24,
+    0xBD65,
+    0xB565,
+    0xB5A5,
+    0xB5A6,
+    0xCE6D,
+    0xDEF3,
+    0xEF78,
+    0xFFFF
+};
+
+int framebuffer[PANEL_WIDTH * PANEL_HEIGHT];
+bool flame_ready = false;
+
+void spread_fire(int from) {
+  int rand = random(1, 4);
+  int to = from - PANEL_WIDTH - rand + 1;
+  if (to < 0) {
+    to = 0;
+  }
+  framebuffer[to] = framebuffer[from] - rand;
+  if (framebuffer[to] < 0)
+    framebuffer[to] = 0;
+}
+
+void do_fire() {
+  for(int x = 0 ; x < PANEL_WIDTH; x++) {
+    for (int y = 1; y < PANEL_HEIGHT ; y++) {
+      spread_fire(y * PANEL_WIDTH + x);
+    }
+  }
+}
+
+
+void setup_flame() {
+    memset(framebuffer, 0, sizeof framebuffer);
+    for (int i = 0; i < PANEL_WIDTH; i++) {
+        framebuffer[(PANEL_WIDTH * PANEL_HEIGHT - i - 1)] = FLAME_PALETTE_SIZE - 1;
+    }
+}
+
+void draw_flame(MatrixPanel_I2S_DMA *matrix, enum Mode mode) {
+  if(not flame_ready) {
+    setup_flame();
+    flame_ready = true;
+  }
+  do_fire();
+  for(int p = 0; p < PANEL_HEIGHT * PANEL_WIDTH; p++) {
+    matrix->drawPixel(p % PANEL_WIDTH, p / PANEL_WIDTH, flame_palette[framebuffer[p]]);
+  }
+
+}
diff --git a/nametag/src/flame.h b/nametag/src/flame.h
new file mode 100644
index 0000000..aa9d8b1
--- /dev/null
+++ b/nametag/src/flame.h
@@ -0,0 +1,4 @@
+#include "xtensa/core-macros.h"
+#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
+#include "enums.h"
+void draw_flame(MatrixPanel_I2S_DMA *matrix, enum Mode mode);
diff --git a/nametag/src/main.cpp b/nametag/src/main.cpp
index d9e5354..5eae744 100644
--- a/nametag/src/main.cpp
+++ b/nametag/src/main.cpp
@@ -8,13 +8,18 @@
 #include "rain.h"
 #include "supercomputer.h"
 #include "cyber.h"
+#include "flame.h"
 
 #include "pillowlava8pt7b.h"
 
+#define CYCLE_TIME_MS 20000
+
 MatrixPanel_I2S_DMA *matrix = nullptr;
 
 Mode mode = HighVis;
-DisplayStyle style = Rain;
+DisplayStyle style = Flame;
+
+unsigned long last_switch;
 
 void setup(){
   pinMode(ONBOARD_LED, OUTPUT);
@@ -25,6 +30,8 @@ void setup(){
   HUB75_I2S_CFG::i2s_pins _pins={R1, G1, BL1, R2, G2, BL2, CH_A, CH_B, CH_C, CH_D, CH_E, LAT, OE, CLK};
   HUB75_I2S_CFG mxconfig(PANEL_WIDTH, PANEL_HEIGHT, PANELS_NUMBER, _pins);
 
+  last_switch = millis();
+
   mxconfig.gpio.e = PIN_E;
   mxconfig.driver = HUB75_I2S_CFG::FM6126A;   // for panels using FM6126A chips
 
@@ -47,6 +54,12 @@ void loop() {
   matrix->clearScreen();
   delay(25);
 
+  if (millis() - last_switch > CYCLE_TIME_MS) {
+    // next style
+    style = DisplayStyle((style + 1) % (NumStyles - 1)); 
+    last_switch = millis();
+  }
+
   if(!digitalRead(BACK_BUTTON)) {
     switch(mode) {
       case Stealth:
@@ -66,7 +79,6 @@ void loop() {
     switch(style) {
       case Rain:
         style = Congress;
-        matrix->setFont(&Pilowlava_Regular8pt7b);
         break;
       case Congress:
         style = Supercomputer;
@@ -86,6 +98,7 @@ void loop() {
       draw_rain(matrix, mode);
       break;
     case Congress:
+      matrix->setFont(&Pilowlava_Regular8pt7b);
       draw_congress(matrix, mode);
       break;
     case Supercomputer:
@@ -94,6 +107,9 @@ void loop() {
     case Cyber:
       draw_cyber(matrix, mode);
       break;
+    case Flame:
+      draw_flame(matrix, mode);
+      break;
   }
 }