1 files changed, 82 insertions, 0 deletions
diff --git a/src/pixelfunc.cpp b/src/pixelfunc.cpp
new file mode 100644
index 0000000..08bbee6
--- /dev/null
+++ b/src/pixelfunc.cpp
@@ -0,0 +1,82 @@
+#include "pixelfunc.h"
+
+RCL_Camera camera;
+static int dx = 1;
+static int dy = 0;
+static int dr = 1;
+static int frame = 0;
+
+void pixelFunc(RCL_PixelInfo *p)
+{
+	int c = GxEPD_WHITE; 
+	if (p->isWall)
+	{
+		c = GxEPD_BLACK;
+	}
+	if (displayPtr != nullptr)
+	{
+		displayPtr->drawPixel(p->position.x, p->position.y, c);
+	}
+}
+
+RCL_Unit heightAt(int16_t x, int16_t y)
+{
+  int32_t index = y * LEVEL_W + x;
+
+  if (index < 0 || (index >= LEVEL_W * LEVEL_H))
+    return RCL_UNITS_PER_SQUARE * 2;
+
+  return level[y * LEVEL_W + x] * RCL_UNITS_PER_SQUARE * 2;
+}
+
+void draw()
+{
+	RCL_RayConstraints c;
+
+	RCL_initRayConstraints(&c);
+
+	c.maxHits = 1;
+	c.maxSteps = 100;
+
+	RCL_renderSimple(camera,heightAt,0,0,c);
+}
+
+void draw_doom()
+{
+	RCL_initCamera(&camera);
+	camera.position.x = 2 * RCL_UNITS_PER_SQUARE;
+	camera.position.y = 2 * RCL_UNITS_PER_SQUARE;
+	camera.direction = 0;
+	camera.resolution.x = SCREEN_W;
+	camera.resolution.y = SCREEN_H;
+
+	for (int i = 0; i < 10000; ++i)
+	{
+		draw();
+
+		int squareX = RCL_divRoundDown(camera.position.x,RCL_UNITS_PER_SQUARE);
+		int squareY = RCL_divRoundDown(camera.position.y,RCL_UNITS_PER_SQUARE);
+
+		if (rand() % 100 == 0)
+		{
+			dx = 1 - rand() % 3;
+			dy = 1 - rand() % 3;
+			dr = 1 - rand() % 3;
+		}
+
+		while (heightAt(squareX + dx,squareY + dy) > 0)
+		{
+			dx = 1 - rand() % 3;
+			dy = 1 - rand() % 3;
+			dr = 1 - rand() % 3;
+		}
+
+		camera.position.x += dx * 200;
+		camera.position.y += dy * 200;
+		camera.direction += dr * 10;
+
+		camera.height = RCL_UNITS_PER_SQUARE + RCL_sin(frame * 16) / 2;
+
+		frame++;
+	}
+}