工程下载
http://pan.baidu.com/s/1o7OEMc6
tcddd.rar
此处为在Windows下运行的TC图形程序;使用了EasyX库;
EasyX库可参考:
http://blog.csdn.net/bcbobo21cn/article/details/51207782
http://www.easyx.cn
代码参考
http://blog.sina.com.cn/s/articlelist_1287275024_9_1.html
一 三维透视投影变换算法
#include <math.h>
#include <graphics.h>
#include <conio.h>
#include <stdio.h>
void draw(float z[][4],float xt0,float yt0,float ts0);
void matrix(float t[][4]);
#define N 22
float p[N][4]={{45,30,0,1},{27,30,0,1},{27,30,10,1},{18,30,10,1},
{18,30,0,1},{0,30,0,1},{0,30,15,1},{45,30,15,1},
{45,30,0,1},{45,0,0,1},{45,0,15,1},{45,15,27,1},
{0,15,27,1},{0,30,15,1},{45,30,15,1},{45,15,27,1},
{45,10,15,1},{45,10,5,1},{45,20,5,1},{45,20,15,1},
{0,0,15,1},{0,0,0,1}
};
int tp[]={-1,0,1,2,3,4,5,6,7,0,-1,0,7,11,10,9,0,-1,16,17,18,19,16,
-1,9,10,20,21,9,-1,10,11,12,20,10,-1,6,7,11,12,6,-1,
5,6,12,20,21,5,-100
};
main()
{
static float tx[4][4];
float b1,b2,h,e,a,l,m,n,k,d,q;
int i;
initgraph(640, 480);
//int driver,mode;
//driver=DETECT;
//initgraph(&driver,&mode,"");
//settextstyle(3,0,_T("宋体"));
settextstyle(16, 0, _T("宋体"));
setcolor(GREEN);
outtextxy(20,20,"3D perspective drawing matrix convert");
for(i=1;i<6;i++)
printf("\n");
//printf("input==>ab,bc,H,θ,α: "); /*θ、α输入法提示:Alt+233,Alt+224 */
//scanf("%f,%f,%f,%f,%f",&b1,&b2,&h,&e,&a);
b1=15;
b2=10;
h=15;
e=233;
a=224;
e=e*3.14159/180.0;
a=a*3.14159/180.0;
l=-1*(b2*cos(e)-b1*sin(e))/2;
m=-(b2*sin(e)+b1*cos(e));
n=-2*h/3;
k=b1*sin(e)+b2*cos(e)-b1*cos(e)*tan(a/2)-b2*sin(e)*tan(a/2);
d=k/(2*tan(a/2));
q=-1/d;
tx[0][0]=cos(e);tx[0][3]=q*sin(e);
tx[1][0]=-sin(e);tx[1][3]=q*cos(e);
tx[2][2]=1;
tx[3][0]=1;tx[3][2]=n;tx[3][3]=m*q+1;
setcolor(YELLOW);
//matrix(tx[0]);
matrix(tx);
getch();
closegraph();
}
void matrix(float t[][4])
{
float z[N][4],xt0,yt0,ts0;
int i,j,k;
for(i=0;i<N;i++)
for(j=0;j<4;j++)
{
z[i][j]=0;
for(k=0;k<4;k++)
z[i][j]=z[i][j]+p[i][k]*t[k][j];
}
//draw(z[0],300,200,z[3][3]);
draw(z,300,200,z[3][3]);
}
void draw(float z[][4],float xt0,float yt0,float ts0)
{
float x[N],y[N];
int i;
for(i=0;i<N;i++)
{
x[i]=xt0-z[i][0]/z[i][3]*ts0*4;
y[i]=yt0-z[i][2]/z[i][3]*ts0*4;
}
for(i=0;i<1000;i++)
{
if(tp[i]==-100) break;
if(tp[i]==-1)
{
i++;
moveto(x[tp[i]],y[tp[i]]);
}
if(tp[i]>=0)
lineto(x[tp[i]],y[tp[i]]);
}
}
二 三视图投影变换算法
#include <math.h>
#include <graphics.h>
#include <conio.h>
#include <stdio.h>
void draw(float z[][4],float xt0,float yt0,float ts0);
void matrix(float t[][4]);
#define N 25
float p[N][4]={{0,0,5,1},{0,0,0,1},{40,0,0,1},{40,0,5,1},
{40,25,5,1},{0,25,5,1},{0,25,0,1},{40,25,0,1},
{0,25,0,1},{0,0,0,1},{35,5,5,1},{35,5,35,1},
{35,10,35,1},{35,10,30,1},{35,15,30,1},{35,20,5,1},
{5,20,5,1},{5,5,5,1},{5,5,35,1},{35,5,35,1},
{35,10,35,1},{5,10,35,1},{5,10,30,1},{5,15,30,1},
{35,15,30,1}
};
int tp[]={-1,0,1,2,3,0,5,6,1,-1,3,4,5,6,7,2,-1,4,7,-1,10,11,12,13,
14,15,10,-1,17,18,21,22,23,16,17,-1,10,17,-1,11,18,-1,12,21,
-1,13,22,-1,14,23,-1,15,16,-100
};
main()
{
static float tv[4][4],th[4][4],tw[4][4];
//int driver,mode;
//driver=DETECT;
//initgraph(&driver,&mode,"");
initgraph(640, 480);
settextstyle(1,0,_T("宋体"));
setcolor(RED);
outtextxy(30,20,"3 sides view graphic matrix convert");
tv[0][0]=1;tv[2][2]=1;tv[3][3]=1;
th[0][0]=1;th[1][2]=-1;th[3][2]=-10;th[3][3]=1;
tw[1][0]=-1;tw[2][2]=1;tw[3][0]=-10;tw[3][3]=1;
setcolor(WHITE);
//matrix(tv[0]);
//matrix(th[0]);
//matrix(tw[0]);
matrix(tv);
matrix(th);
matrix(tw);
getch();
closegraph();
}
void matrix(float t[][4])
{
float z[N][4],xt0,yt0,ts0;
int i,j,k;
for(i=0;i<N;i++)
for(j=0;j<4;j++)
{
z[i][j]=0;
for(k=0;k<4;k++)
z[i][j]=z[i][j]+p[i][k]*t[k][j];
}
//draw(z[0],310,270,4);
draw(z,310,270,4);
}
void draw(float z[][4],float xt0,float yt0,float ts0)
{
float x[N],y[N];
int i;
for(i=0;i<N;i++)
{
x[i]=xt0-z[i][0]*ts0;
y[i]=yt0-z[i][2]*ts0;
}
for(i=0;i<1000;i++)
{
if(tp[i]==-100) break;
if(tp[i]==-1)
{
i++;
moveto(x[tp[i]],y[tp[i]]);
}
if(tp[i]>=0)
lineto(x[tp[i]],y[tp[i]]);
}
}
三 三维正轴测投影变换算法
#include <math.h>
#include <graphics.h>
#include <conio.h>
#include <stdio.h>
void draw(float z[][4],float xt0,float yt0,float ts0);
void matrix(float t[][4]);
#define N 18
float p[N][4]={{0,0,0,1},{0,40,0,1},{45,40,0,1},{45,0,0,1},
{45,0,8,1},{45,40,8,1},{8,40,8,1},{8,0,8,1},
{8,0,28,1},{8,40,28,1},{0,40,28,1},{0,0,28,1},
{40,24,8,1},{8,24,8,1},{8,24,24,1},{8,16,24,1},
{8,16,8,1},{40,16,8,1}
};
int tp []={-1,0,1,2,3,0,5,6,1,-1,3,4,5,6,7,2,-1,4,7,-1,10,11,12,
13,14,15,10,-1,17,18,21,22,23,16,17,-1,10,17,-1,11,18,-1,
12,21,-1,13,22,-1,14,23,-1,15,16,-100};
main()
{
static float tx[4][4];
float beta,cita;
//int driver,mode;
//driver=DETECT;
//initgraph(&driver,&mode,"");
initgraph(640, 480);
//settextstyle(1,0,_T("宋体"));
settextstyle(16, 0, _T("宋体"));
setcolor(BROWN);
outtextxy(140,20,"3D graphic matrix convert");
//printf("input==>β, θ: "); /*β和θ的输入法分别为:Alt+225, Alt +233*/
//scanf("%f,%f",&beta,&cita);
beta=225;
cita=233;
beta=beta*3.14159/180.0;
cita=cita*3.14159/180.0;
tx[0][0]=cos(beta);tx[0][2]=-sin(beta)*sin(cita);
tx[1][0]=-sin(beta);
tx[1][2]=-cos(beta)*sin(cita);tx[2][2]=cos(cita);
tx[3][3]=1;
setcolor(CYAN);
//matrix(tx[0]);
matrix(tx);
getch();
closegraph();
}
void matrix(float t[][4])
{
float z[N][4],xt0,yt0,ts0;
int i,j,k;
for(i=0;i<N;i++)
for(j=0;j<4;j++)
{
z[i][j]=0;
for(k=0;k<4;k++)
z[i][j]=z[i][j]+p[i][k]*t[k][j];
}
//draw(z[0],300,200,4);
draw(z,300,200,4);
}
void draw(float z[][4],float xt0,float yt0,float ts0)
{
float x[N],y[N];
int i;
for(i=0;i<N;i++)
{
x[i]=xt0-z[i][0]*ts0;
y[i]=yt0-z[i][2]*ts0;
}
for(i=0;i<1000;i++)
{
if(tp[i]==-100) break;
if(tp[i]==-1)
{
i++;
moveto(x[tp[i]],y[tp[i]]);
}
if(tp[i]>=0)
lineto(x[tp[i]],y[tp[i]]);
}
}
四 相关编程问题
1 二维数组做函数参数
上面三个程序使用了二维数组做函数参数;看一个 二维数组做函数参数 的例子;
#include <stdio.h>
void print_array(int *array, int len)
{
int i = 0;
for ( ; i < len; i++) {
printf("%d ",array[i]);
}
putchar('\n');
}
void func(int array[3][10])
{
print_array(array[0], 10);
print_array(array[1], 10);
print_array(array[2], 10);
print_array(array[3], 10);
print_array(array[4], 10);
}
int main()
{
int array[5][10] = {
{0,1,2,3,4,5,6,7,8,9},
{10,11,12,13,14,15,16,17,18,19},
{20,21,22,23,24,25,26,27,28,29},
{30,31,32,33,34,35,36,37,38,39},
{40,41,42,43,44,45,46,47,48,49}
};
func(array);
return 0;
}
2 easyX库对TC函数的改进
settextstyle(1,0,4);
需要改为
settextstyle(16, 0, _T("宋体"));以及其他改进,参见
easyx帮助手册和
http://www.easyx.cn/skills/View.aspx?id=89