MatrixEffect can now have multiple columns in the same column. In RandomMatrix, they even run in all directions.

include/effect_matrix.h

@@ -9,16 +9,23 @@
 class MatrixEffectColumn {
 protected:
     Window* window;
-    int x, y;
+    uint8_t x, y;
-    int length = 1;
+    uint8_t length = 1;
+    uint8_t _direction = 2;
+    bool _random_direction = false;
     virtual CRGB _getColor(uint8_t height);
-    virtual void restart();
+    virtual void restart(bool completely_random);
 private:
     uint16_t speed;
     boolean running;
     unsigned long last_move = 0;
 public:
-    MatrixEffectColumn(Window* win, int xPos);
+	static const uint8_t DIR_NORTH = 0;
+	static const uint8_t DIR_EAST = 1;
+	static const uint8_t DIR_SOUTH = 2;
+	static const uint8_t DIR_WEST = 3;
+
+    MatrixEffectColumn(Window* win, uint8_t direction=0, bool random_direction=false);
     virtual ~MatrixEffectColumn() {};
     void advance();
     void draw();
@@ -29,16 +36,16 @@ class RainbowMatrixEffectColumn : public MatrixEffectColumn {
 protected:
     CRGB _getColor(uint8_t height) override;
 public:
-    RainbowMatrixEffectColumn(Window* win, int xPos) : MatrixEffectColumn(win, xPos) {};
+    RainbowMatrixEffectColumn(Window* win, uint8_t dir, bool rnd=false) : MatrixEffectColumn(win, dir, rnd) {};
 };
 
 class RandomMatrixEffectColumn : public MatrixEffectColumn {
 protected:
     uint8_t _hue = 42;
     CRGB _getColor(uint8_t height) override;
-    void restart() override;
+    void restart(bool completely_random) override;
 public:
-    RandomMatrixEffectColumn(Window* win, int xPos) : MatrixEffectColumn(win, xPos) {};
+    RandomMatrixEffectColumn(Window* win, uint8_t dir, bool rnd=false) : MatrixEffectColumn(win, dir, rnd) {};
 };
 
 class MatrixEffect : public Effect {

src/effect_matrix.cpp

@@ -2,29 +2,80 @@
 #include "my_color_palettes.h"
 #include "functions.h"
 
-MatrixEffectColumn::MatrixEffectColumn(Window* win, int xPos) {
+MatrixEffectColumn::MatrixEffectColumn(Window* win, uint8_t dir, bool rand) {
     window = win;
-    x = xPos;
+    _direction = dir;
-    restart();
+    _random_direction = rand;
-    y = random8(0, window->height);
+    restart(true);
+}
+
+void MatrixEffectColumn::restart(bool completely_random) {
+	if (_random_direction) {
+		_direction = random8(4);
+	}
+
+	if (completely_random) {
+		x = random8(window->width);
+		y = random8(window->height);
+	} else {
+		switch(_direction) {
+			case DIR_NORTH:
+				x = random8(window->width);
+				y = window->height - 1;
+				break;
+			case DIR_EAST:
+				x = 0;
+				y = random8(window->height);
+				break;
+			case DIR_SOUTH:
+				x = random8(window->width);
+				y = 0;
+				break;
+			case DIR_WEST:
+				x = window->width - 1;
+				y = random8(window->height);
+				break;
+		}
 	}
 
-void MatrixEffectColumn::restart() {
-    y=-1;
     length = random8(EFFECT_MATRIX_LENGTH_MIN, EFFECT_MATRIX_LENGTH_MAX);
     running = true;
     speed = random8(EFFECT_MATRIX_SPEED_MIN, EFFECT_MATRIX_SPEED_MAX);
 }
 
 void MatrixEffectColumn::advance() {
+	switch(_direction) {
+		case DIR_NORTH:
+			y--;
+			if (y > window->height && y + length > window->height) running=false;
+			break;
+		case DIR_EAST:
+			x++;
+			if (x - length > window->width) running=false;
+			break;
+		case DIR_SOUTH:
 			y++;
 			if (y - length > window->height) running=false;
+			break;
+		case DIR_WEST:
+			x--;
+			if (x > window->width && y + length > window->width) running=false;
+			break;
+	}
 }
 
 void MatrixEffectColumn::draw() {
+	int8_t xdir = 0;
+	int8_t ydir = 0;
+	switch (_direction) {
+		case DIR_NORTH: ydir = 1; break;
+		case DIR_EAST:  xdir = 1; break;
+		case DIR_SOUTH: ydir = -1; break;
+		case DIR_WEST:  xdir = -1; break;
+	}
     for(int i=0; i<length; i++) {
         CRGB color = _getColor(i);
-        window->setPixel(x, y-i, &color);
+        window->raisePixel(x+(xdir*i), y+(ydir*i), &color);
     }
 }
 
@@ -32,7 +83,7 @@ void MatrixEffectColumn::loop() {
     if (!running) {
         if (random8() < 20) {
             // Start the column again.
-            restart();
+            restart(false);
         }
     } else {
         if (millis() - last_move > speed) {
@@ -75,8 +126,8 @@ CRGB RandomMatrixEffectColumn::_getColor(uint8_t i) {
     return color;
 }
 
-void RandomMatrixEffectColumn::restart() {
+void RandomMatrixEffectColumn::restart(bool completely_random) {
-    MatrixEffectColumn::restart();
+    MatrixEffectColumn::restart(completely_random);
     _hue = random8();
 }
 
@@ -97,15 +148,15 @@ MatrixEffect::MatrixEffect() {
 }
 
 void MatrixEffect::_init() {
-	for (int i=0; i<window->width; i++) _columns[i] = new MatrixEffectColumn(window, i);
+	for (int i=0; i<window->width; i++) _columns[i] = new MatrixEffectColumn(window, MatrixEffectColumn::DIR_SOUTH);
 }
 
 void RandomMatrixEffect::_init() {
-	for (int i=0; i<window->width; i++) _columns[i] = new RandomMatrixEffectColumn(window, i);
+	for (int i=0; i<window->width; i++) _columns[i] = new RandomMatrixEffectColumn(window, random8(4), true);
 }
 
 void RainbowMatrixEffect::_init() {
-	for (int i=0; i<window->width; i++) _columns[i] = new RainbowMatrixEffectColumn(window, i);
+	for (int i=0; i<window->width; i++) _columns[i] = new RainbowMatrixEffectColumn(window, MatrixEffectColumn::DIR_SOUTH);
 }
 
 MatrixEffect::~MatrixEffect() {