arg list syntax error

[tamaza]

arg list syntax error.
The error occurred in the program at arg list int get_coeff(wcpt3 pt1
,wcpt3 pt2,wcpt3 pt3)(z-buffer method).
i got the code from this link.
Computer Graphics - Sinha and Udai - Google Books
i wish to get c code for visible surface method.(back face or depth buffer(z-buffer) or scan line method)

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#define TRUE 1
#define FALSE 0


struct wcpt3{
	float x,y,z;
	}nan;
struct plane{
	float A,B,C,D;
	};


int get_coeff(wcpt3 pt1
,wcpt3 pt2,wcpt3 pt3)
{
plane temp;
temp.A=(pt2.z-pt3.z)*(pt1.y-pt2.y)-(pt1.z-pt2.z)*(pt2.y-pt3.y);
temp.B=(pt2.x-pt3.x)*(pt1.z-pt2.z)-(pt1.x-pt2.x)*(pt2.z-pt3.z);
temp.C=(pt2.y-pt3.y)*(pt1.x-pt2.x)-(pt1.y-pt2.y)*(pt2.x-pt3.x);
temp.D=-pt1.x*(pt2.y*pt3.z-pt2.z*pt3.y)+pt1.y*(pt2.x*pt3.z-pt2.z*pt3.x)-pt1.z*(pt2.x*pt3.y-pt2.y*pt3.x);
return temp;
}


float depth(plane surface, float x, float y)
{
	float z=0;
	if(surface.C!=0)
		z=(-surface.A*x-surface.B*y-surface.D)/surface.C;
	return Z;
}


int side_check(wcpt3 ptA, wcpt3 ptB, wcpt3 ptC, float X,float y)
{
float fxyC,fxy;
fxyC=ptC.x*(ptA.y-ptB.y)-ptC.y*(ptA.x-ptB.x)-ptA.x*(ptA.y*ptB.y)+ptA.y*(ptA.x-ptB.x);
fxy=x*(ptA.y-ptB.y)-y*(ptA.x-ptB.x)-ptA.x*(ptA.y-ptB.y)+ptA.y*(ptA.x-ptB.x);
if((fxyC<0)&&(fxy<0))||((fxyC>0)&&(fxy>0)))
return TRUE;
else
return FALSE;
}


int inside_triangle_check(wcpt3 pt1,wcpt3 pt2, wcpt3 pt3,flat x,float y)
{
int check=side_check(pt1,pt2,pt3,x,y)&&side_check(pt2,pt3,pt1,x,y)&&side_check(pt3,pt1,pt2,x,y);


if(check==TRUE)
return TRUE;
else
return FALSE;
}
void main(void)
{
	int gd=DETECT,gm;
	initgraph(&gd,&gm,"");
	wcpt3 ptA,ptB,ptC,ptD;
	plane surface[10];
	int clr_background=BLACK,clr,numsurf,colorxy[4],surf_clr[10];
	float depth_background=0,depthxy[4],x,y,z;
	ptA.x=200; ptA.y=200; ptA.z=200;
	ptB.x=600; ptB.y=200; ptB.z=200;
	ptC.x=400; ptC.y=200; ptC.z=600;
	ptD.x=400; ptD.y=400; ptD.z=400;


	surface[0]=get_coeff(ptA,ptC,ptD);
	surf_clr[0]=BLUE;
	surface[1]=get_coeff(ptC,ptB,ptD);
	surf_clr[1]=GREEN;
	surface[2]=get_coeff(ptB,ptA,ptD);
	surf_clr[2]=CYAN;
	surface[3]=get_coeff(ptA,ptC,ptB);
	surf_clr[3]=RED;
	for(x= 0;x<getmaxy();x++)
	{
		for(numsurf=0; numsurf<4;numsurf++)
		{
			depth[numsurf]=depth_background;
			colorxy[numsurf]=clr_background;
		}
	if(inside_triangle_check(ptA,ptC,ptD,x,y)==TRUE)
		depthxy[0]=depth(surface[0],x,y);
	if(inside_triangle_check(ptC,ptB,ptD,x,y)==TRUE)
		depthxy[1]=depth(surface[1],x,y);
	if(inside_triangle_check(ptA,ptB,ptD,x,y)==TRUE)
		depthxy[2]=depth(surface[2],x,y);


	if(inside_triangle_check(ptA,ptc,ptB,x,y)==TRUE;
		depthxy[3]=depth(surface[3]x,y);
	z=depth_background;
	clr=clr_background;
	for(numsurf=0;numsurf<4;numsurf++)
	{
		if(deprhxy[numsurf]>z)
		{
			z=depthxy[numsurf];
			clr=surf_clr[numsurf];
		}
	}
	putpixel(x,y,clr);


}
getch();
}










With regards,
Tamasa.

[Salem]

I guess your link is useless to anyone outside India.

Also, you're learning using TurboC, which sets you back about 25 years from the state of the art. If you're serious about learning modern graphics, you need to find a book which doesn't use TC as the reference compiler.

Another nail in the coffin for this book is the fact that the author doesn't know the difference between C and C++.
Whist it superficially looks like C, the use of structs comes from C++.

float depth(plane surface, float x, float y)
C++ automatically creates the typename for each struct.

In C, you would either have to do this.
float depth(struct plane surface, float x, float y)

Or do this

typedef struct plane{
    float A,B,C,D;
    } plane;

This code is utterly pointless

if(check==TRUE)
return TRUE;
else
return FALSE;

You may as well just say
return check;

Likewise, where you're testing what are essentially boolean functions with
if ( foo() == TRUE )
you can just as easily say
if ( foo() )

[Fordy]

>>Also, you're learning using TurboC, which sets you back about 25 years from the state of the art. If you're serious about learning modern graphics, you need to find a book which doesn't use TC as the reference compiler.

If you want to learn auto-mobile engineering in India, do you have to purchase your own hand-crank to start the cars or is it provided as part of the course?

[tamaza]

Thank you!