#include "sgl.h"

#include "math.h"

#define RGB(r, g, b) ((sgl_uint32) (((r) << 16) | ((g) << 8) | (b)))



SGLCONTEXT     SGLContext;

SGLVERTEX      Vertices[] =	{

/*                 x      y    z  (1/W)     col       spec.col (u/W) (v/W) */

	   	   {  0.0f,240.0f,0.0f,0.1f,RGB(255,0,0),RGB(0,0,0),0.0f,0.0f},

	    	   {320.0f,479.0f,0.0f,0.8f,RGB(255,0,0),RGB(0,0,0),0.0f,0.0f},

		   {639.0f,240.0f,0.0f,0.1f,RGB(255,0,0),RGB(0,0,0),0.0f,0.0f},

		   {320.0f,  0.0f,0.0f,0.8f,RGB(0,255,0),RGB(0,0,0),0.0f,0.0f}

							};

int		   TriFaceData[][3] = {{0,1,2},{3,0,2}};

int            Device,frame,run;



void main ()

{

	Device = sgl_create_screen_device (0, 640, 480, sgl_device_16bit, TRUE);

	if (Device >= 0)

	{

	    SGLContext.bFogOn=TRUE;

	    SGLContext.fFogR=0.5f;

	    SGLContext.fFogG=0.5f;

	    SGLContext.fFogB=1.0f;

	    SGLContext.u32FogDensity=16;

		for(run=1; run<5 ; run++)

		{

		  for(frame=1; frame<128; frame++)

		  {

		    Vertices[0].fX=(64-abs(frame-64))*10.0f-5.0f;

		    Vertices[2].fX=645.0f-(64-abs(frame-64))*10.0f;

		    sgltri_startofframe (&SGLContext);

		    sgltri_triangles    (&SGLContext, 2, TriFaceData, Vertices);

		    sgltri_render       (&SGLContext);

		  }

		}

	    sgl_delete_device(Device);

	} 

}