Add Library

libraries/bitluni_ESP32Lib/examples/Raytracer/Raytracer.ino

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+//A realtime raytraycer utilizing both cores of the ESP32. Please change the pin configuration in the setup if you are not using VGA v0.1 or the Black Edition shields.
+//cc by-sa 4.0 license
+//bitluni
+
+#include <ESP32Lib.h>
+#include <Ressources/Font6x8.h>
+#include <math.h>
+#include <Math/Matrix.h>
+#include "Raytracer.h"
+
+//VGA Device
+VGA14Bit vga;
+
+int taskData[2][3] = 
+  {
+    {0, 0, 160},
+    {0, 160, 320} 
+  };
+
+static Sphere sphere(Vector(0, 0.5f, 0), 1);
+static Sphere sphere2(Vector(1, 1.5f, 0.5), 0.5f);
+static Checker checker;
+static Raytracable *objects[] = {&sphere, &sphere2, &checker};
+static Vector light = Vector(5, 4, -5);
+
+void raytraceTask(void *param)
+{
+  static Vector p(0, 1, -10);
+  int *data = (int*)param;
+  while(true)
+  {
+    while(!data[0]) delay(1);
+    for(int y = 0; y < 200; y++)
+      for(int x = data[1]; x < data[2]; x++)
+      {
+        Vector v(float(x - 160) * (1.f / 320), float(100 - y) * (1.f / 320), 1.f);
+        v.normalize();
+        Ray r(p, v);
+        Vector c = raytrace(objects, 3, r, light, 3);
+        vga.dotFast(x, y, vga.RGB(c[0] * 255, c[1] * 255, c[2] * 255));
+      }
+    data[0] = 0;
+  }
+}
+
+//initial setup
+void setup()
+{
+  //we need double buffering for smooth animations
+  vga.setFrameBufferCount(2);  
+	//initializing i2s vga
+  //Pin presets are avaialable for: VGAv01, VGABlackEdition, VGAWhiteEdition, PicoVGA
+  //But you can also use custom pins. Check the other examples  
+	vga.init(vga.MODE320x200, vga.VGABlackEdition);
+	//setting the font
+	vga.setFont(Font6x8);
+  light.normalize();
+  sphere.reflection = 0.4f;
+  sphere2.reflection = 0.5f;
+  checker.reflection = 0.2f;
+  sphere.c = Vector(0, 1, 0);
+  sphere2.c = Vector(1, 0, 1);
+  static uint8_t ucParameterToPass;
+  TaskHandle_t xHandle = NULL;
+  xTaskCreatePinnedToCore(raytraceTask, "Raytracer1", 2000, taskData[0],  ( 2 | portPRIVILEGE_BIT ), &xHandle, 0);
+  xTaskCreatePinnedToCore(raytraceTask, "Raytracer2", 2000, taskData[1],  ( 2 | portPRIVILEGE_BIT ), &xHandle, 1);
+}
+
+//the loop is done every frame
+void loop()
+{  
+  taskData[0][0] = 1;
+  taskData[1][0] = 1;
+  //waiting for task to finish
+  while(taskData[0][0] || taskData[1][0]) delay(1);
+  sphere2.p.v[0] = sin(millis() * 0.0005f) * 2;
+  sphere2.p.v[2] = cos(millis() * 0.0005f) * 2;
+  sphere.p.v[1] = sphere2.p[0] * 0.3 + 1;
+  //setting the text cursor to the lower left corner of the screen
+  vga.setCursor(0, 0);
+  //setting the text color to white with opaque black background
+  vga.setTextColor(vga.RGB(0xffffff), vga.RGBA(0, 0, 0, 0));
+  //printing the fps
+  vga.print("ms/frame: ");
+  static long t = 0;
+  long ct = millis();
+  vga.print(ct - t);
+  t = ct;
+  vga.show();
+}