From 482312b4a70652bb03d75b009e2896b669bb13fa Mon Sep 17 00:00:00 2001
From: mrfaptastic <12006953+mrfaptastic@users.noreply.github.com>
Date: Thu, 19 Aug 2021 23:13:16 +0100
Subject: [PATCH] Create BouncingSquares.ino

---
 examples/BouncingSquares/BouncingSquares.ino | 77 ++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 examples/BouncingSquares/BouncingSquares.ino

diff --git a/examples/BouncingSquares/BouncingSquares.ino b/examples/BouncingSquares/BouncingSquares.ino
new file mode 100644
index 0000000..09d3ddd
--- /dev/null
+++ b/examples/BouncingSquares/BouncingSquares.ino
@@ -0,0 +1,77 @@
+#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
+
+MatrixPanel_I2S_DMA *display = nullptr;
+
+uint16_t myDARK = display->color565(64, 64, 64);
+uint16_t myWHITE = display->color565(192, 192, 192);
+uint16_t myRED = display->color565(255, 0, 0);
+uint16_t myGREEN = display->color565(0, 255, 0);
+uint16_t myBLUE = display->color565(0, 0, 255);
+
+uint16_t colours[5] = { myDARK, myWHITE, myRED, myGREEN, myBLUE};
+
+struct Square
+{
+  float xpos, ypos;
+  float velocityx;
+  float velocityy;
+  boolean xdir, ydir;    
+  uint16_t square_size;
+  uint16_t colour;
+};
+
+const int numSquares = 25;
+Square Squares[numSquares];
+
+void setup() 
+{
+  // put your setup code here, to run once:
+  delay(1000); 
+  Serial.begin(115200);
+  delay(200);
+
+  Serial.println("...Starting Display");
+  HUB75_I2S_CFG mxconfig;
+  //mxconfig.double_buff = true; // Turn of double buffer
+  mxconfig.clkphase = false;
+
+  // OK, now we can create our matrix object
+  display = new MatrixPanel_I2S_DMA(mxconfig);  
+  display->begin();  // setup display with pins as pre-defined in the library
+
+  // Create some Squares
+  for (int i = 0; i < numSquares; i++)
+  {
+    Squares[i].xpos = random(0, display->width());
+    Squares[i].ypos = random(0, display->height());
+    Squares[i].velocityx = static_cast <float> (rand()) / static_cast <float> (RAND_MAX);
+    Squares[i].velocityy = static_cast <float> (rand()) / static_cast <float> (RAND_MAX);    
+    //Squares[i].xdir = (random(2) == 1) ? true:false;
+    //Squares[i].ydir = (random(2) == 1) ? true:false;    
+    Squares[i].square_size = random(2,10);
+
+    int random_num = random(6);
+    Squares[i].colour = colours[random_num]; 
+  }
+  
+}
+
+void loop() 
+{   
+  display->flipDMABuffer(); // not used if double buffering isn't enabled    
+  delay(25);  
+  display->clearScreen();  
+
+  for (int i = 0; i < numSquares; i++)
+  {
+    // Draw rect and then calculatae
+    display->fillRect(Squares[i].xpos, Squares[i].ypos, Squares[i].square_size, Squares[i].square_size, Squares[i].colour);
+
+    if (Squares[i].xpos >= display->width())  { Squares[i].velocityx *= -1;   } else if (Squares[i].xpos <= 0) { Squares[i].velocityx = abs (Squares[i].velocityx); } 
+    if (Squares[i].ypos >= display->height()) { Squares[i].velocityy *= -1;   } else if (Squares[i].ypos <= 0) { Squares[i].velocityy = abs (Squares[i].velocityy); } 
+
+    Squares[i].xpos += Squares[i].velocityx ;
+    Squares[i].ypos += Squares[i].velocityy ;
+  }
+      
+}