Refactor paths

examples/vga_watersurface/src/main.cpp

@@ -0,0 +1,77 @@
+
+// ****************************************************************************
+//
+//                                 Main code
+//
+// ****************************************************************************
+
+#include "include.h"
+
+// Draw box
+ALIGNED u8 Box[WIDTHBYTE*HEIGHT];
+
+// duck canvas
+sCanvas DuckCanvas;
+
+int main()
+{
+	float phase;
+	int y, y0, y2, duckx;
+
+	// initialize videomode
+	Video(DEV_VGA, RES_EGA, FORM_8BIT, Box);
+
+	// prepare duck canvas
+	DuckCanvas.img = (u8*)DuckImg;
+	DuckCanvas.w = 512;
+	DuckCanvas.h = 58;
+	DuckCanvas.wb = 512;
+	DuckCanvas.format = CANVAS_8;
+
+	// initialize sound output
+	PWMSndInit();
+
+	// play sound
+	PlaySound(RiverSnd, sizeof(RiverSnd), True);
+
+	// display top part of the screen
+	memcpy(Box, ForestImg, IMGH*WIDTH);
+
+	// main loop
+	phase = 0;
+	duckx = 650;
+	while (true)
+	{
+		// to avoid duck flickering
+		WaitVSync();
+
+		// animate water
+		for (y = IMGH; y < HEIGHT; y++)
+		{
+
+#define WAVEAMP		0.1f	// wave amplitude
+#define WAVEPERSP	30.0f	// perspective deformation
+#define WAVELEN		200	// wave length
+#define ANIMSPEED	0.4f	// animation speed
+
+			y0 = y - IMGH; // Y relative to top of water
+			y2 = (int)(IMGH - 1 - (sinf(phase + WAVELEN/sqrtf(y0/WAVEPERSP + 1))*WAVEAMP + 1)*y0);
+			if (y2 < 0) y2 = 0;
+			if (y2 >= IMGH) y2 = IMGH-1;
+			memcpy(&Box[y*WIDTH], &ForestImg[y2*WIDTH], WIDTH);
+		}
+
+		// display duck
+		DrawBlit(&Canvas, &DuckCanvas, duckx, 280, (duckx & 3)*128, 0, 128, 58, 0x86);		
+
+		// increase animation phase
+		phase += ANIMSPEED;
+
+		// shift duck
+		duckx--;
+		if (duckx < -250) duckx = 650;
+
+		// delay
+		sleep_ms(50);
+	}
+}