bnch_msh.c

公司vc培训的时候,给大家几个例子,比较实用,拿来分享

/*............................ BNCH_MSH.C ............... 2-15-96 ..........*/
/* This routine benchmarks VSA_SHADED_TRIANGLE and VSA_TRIANGLE_FILL        */
/*..........................................................................*/

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<math.h>
#include<time.h>
#include<vsa.h>
#include<vsa_font.h>
#include<my_tools.h>

extern unsigned _stklen = 20000;            /* This is for Borland C Only ! */

void main()
 {
	char atext[100];
	int points[4000],m,n,mm,nn,vmode;
	unsigned i,j,k,p,dx,dy,x,y,repeat;
	clock_t delta,clk;
	float timer,pixels,triangles,fa,fb;
	printf("Input video mode: ");
	scanf("%x",&vmode);
	vsa_init(vmode);
	special_lut();
	color_bar(100,305);
	vsa_set_triangle_clip_mode(0);

ZIPPY:
	dx = 3;
	dy = 3;
	m=n= 32;
	repeat = 6;
	for(p=0;p<3;p++)
		{
			mm=nn=m+1;
			for(j=0;j<nn;j++)
				for(i=0;i<mm;i++)
					{
						fa = sin(3.14*i/mm);
						fb = sin(3.14*j/nn);
						points[j*mm+i] = 223*fa*fa*fb*fb;
					}
			pixels = (float)dx*(float)dy*(float)m*(float)n*(float)repeat;
			triangles = 2*m*n*repeat;
			clk = clock();
			for(k=0;k<repeat;k++)
				{
					vsa_set_color(64+k*32);
					for(j=0;j<n;j++)
						for(i=0;i<m;i++)
							{
								x = i*dx+50;
								y = j*dy+50;
								vsa_triangle_fill(x,y,x+dx,y,x,y+dy);
								vsa_triangle_fill(x+dx,y,x,y+dy,x+dx,y+dy);
							}
				}
			delta = clock() - clk;
			timer = ((float)(delta))/((float)CLOCKS_PER_SEC);
			vsa_move_to(0,0);
			vsa_set_color(0);
			vsa_rect_fill(350,35);
			if(timer == 0.0)
				timer = 0.00001;
			sprintf(atext,"Drawing Rate = %f pixels/sec\n",pixels/timer);
			vsa_write_string(5,5,253,atext);
			sprintf(atext,"               %f triangles/sec\n",triangles/timer);
			vsa_write_string(5,20,253,atext);
			if(getch() == 27)
				goto BAIL;
			clk = clock();
			for(k=0;k<repeat;k++)
				{
					for(j=0;j<n;j++)
						for(i=0;i<m;i++)
							{
								x = i*dx+50;
								y = j*dy+50;
								vsa_shaded_triangle(x,y,points[j*mm+i]+k*16,
																x+dx,y,points[j*mm+i+1]+k*16,
																x,y+dy,points[j*mm+i+mm]+k*16);
								vsa_shaded_triangle(x+dx,y,points[j*mm+i+1]+k*16,
																x,y+dy,points[j*mm+i+mm]+k*16,
																x+dx,y+dy,points[j*mm+i+1+mm]+k*16);
							}
				}
			delta = clock() - clk;
			timer = ((float)(delta))/((float)CLOCKS_PER_SEC);
			vsa_move_to(0,0);
			vsa_set_color(0);
			vsa_rect_fill(350,35);
			if(timer == 0.0)
				timer = 0.00001;
			sprintf(atext,"Drawing Rate = %f pixels/sec\n",pixels/timer);
			vsa_write_string(5,5,253,atext);
			sprintf(atext,"               %f triangles/sec\n",triangles/timer);
			vsa_write_string(5,20,253,atext);
			if(getch() == 27)
				goto BAIL;
			dx *= 10;
			dy *= 10;
			m /= 4;
			n /= 4;
			repeat ++;
		}
	goto ZIPPY;
BAIL:
	vsa_init(0x3);
	return;
}