Deeper color depth

1 files changed, 40 insertions, 36 deletions

diff --git a/examples/4_HueValueSpectrumDemo/4_HueValueSpectrumDemo.ino b/examples/4_HueValueSpectrumDemo/4_HueValueSpectrumDemo.ino
index 3fcbb31..e64d419 100644
--- a/examples/4_HueValueSpectrumDemo/4_HueValueSpectrumDemo.ino
+++ b/examples/4_HueValueSpectrumDemo/4_HueValueSpectrumDemo.ino
@@ -2,38 +2,33 @@
 #define PANEL_RES_Y 32     // Number of pixels tall of each INDIVIDUAL panel module.
 #define PANEL_CHAIN 1      // Total number of panels chained one to another
 
-#define NO_CIE1931
-#define PIXEL_COLOUR_DEPTH_BITS      8
 #include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
 
 MatrixPanel_I2S_DMA *dma_display = nullptr;
 
-#define R1_PIN 25
-#define G1_PIN 26
-#define B1_PIN 27
-#define R2_PIN 14
-#define G2_PIN 12
-#define B2_PIN 13
-#define A_PIN 23
-#define B_PIN 19
-#define C_PIN 5
-#define D_PIN 17
-#define E_PIN -1 // required for 1/32 scan panels, esp for 64x64 or 128x64 displays
-#define LAT_PIN 4
-#define OE_PIN 15
-#define CLK_PIN 16
-
-uint32_t lastMillis;
-
 void setup() {
-  HUB75_I2S_CFG::i2s_pins _pins={R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN};
+  HUB75_I2S_CFG::i2s_pins _pins={
+    25, //R1_PIN, 
+    26, //G1_PIN, 
+    27, //B1_PIN, 
+    14, //R2_PIN, 
+    12, //G2_PIN, 
+    13, //B2_PIN, 
+    23, //A_PIN, 
+    19, //B_PIN, 
+    5, //C_PIN, 
+    17, //D_PIN, 
+    18, //E_PIN,
+    4, //LAT_PIN, 
+    15, //OE_PIN, 
+    16, //CLK_PIN
+  };
   HUB75_I2S_CFG mxconfig(
     PANEL_RES_X, // Module width
     PANEL_RES_Y, // Module height
-    1, // chain length
+    PANEL_CHAIN, // chain length
     _pins // pin mapping
   );
-  //mxconfig.gpio.e = 18;
   //mxconfig.clkphase = false;
   //mxconfig.driver = HUB75_I2S_CFG::FM6126A;
 
@@ -46,26 +41,35 @@ void setup() {
 void loop() {
   // Canvas loop
   float t = (float)(millis()%4000)/4000.f;
-  for(int x = 0; x < PANEL_RES_X; x++){
-    float r =max(min(cosf(2.f*PI*(t+(float)x/PANEL_RES_X+0.f/3.f))+0.5f,1.f),0.f);
-    float g =max(min(cosf(2.f*PI*(t+(float)x/PANEL_RES_X+1.f/3.f))+0.5f,1.f),0.f);
-    float b =max(min(cosf(2.f*PI*(t+(float)x/PANEL_RES_X+2.f/3.f))+0.5f,1.f),0.f);
-    for(int y = 0; y < PANEL_RES_Y; y++)
+  float tt = (float)((millis()%16000)/16000.f;
+
+  for(int x = 0; x < PANEL_RES_X*PANEL_CHAIN; x++){
+    // calculate the overal shade
+    float f = ((sin(tt-(float)x/PANEL_RES_Y/32.)*2.f*PI)+1)/2)*255;
+    // calculate hue spectrum into rgb
+    float r = max(min(cosf(2.f*PI*(t+((float)x/PANEL_RES_Y+0.f)/3.f))+0.5f,1.f),0.f);
+    float g = max(min(cosf(2.f*PI*(t+((float)x/PANEL_RES_Y+1.f)/3.f))+0.5f,1.f),0.f);
+    float b = max(min(cosf(2.f*PI*(t+((float)x/PANEL_RES_Y+2.f)/3.f))+0.5f,1.f),0.f);
+
+    // iterate pixels for every row
+    for(int y = 0; y < PANEL_RES_Y; y++){
       if(y*2 < PANEL_RES_Y){
-        float t = (2.f*y)/PANEL_RES_Y;
+        // top-middle part of screen, transition of value
+        float t = (2.f*y+1)/PANEL_RES_Y;
         dma_display->drawPixelRGB888(x,y,
-          (r*t)*255,
-          (g*t)*255,
-          (b*t)*255
+          (r*t)*f,
+          (g*t)*f,
+          (b*t)*f
         );
       }else{
-        float t = (2.f*(PANEL_RES_Y-y))/PANEL_RES_Y;
+        // middle to bottom of screen, transition of saturation
+        float t = (2.f*(PANEL_RES_Y-y)-1)/PANEL_RES_Y;
         dma_display->drawPixelRGB888(x,y,
-          (r*t+1-t)*255,
-          (g*t+1-t)*255,
-          (b*t+1-t)*255
+          (r*t+1-t)*f,
+          (g*t+1-t)*f,
+          (b*t+1-t)*f
         );
       }
-        
+    }
   }
 }