// FILE: lines.c
#include <windows.h>
#include "intern.h"
#include "globals.h"
#include "gdi3D.h"
#include "helpers.h"


/*
     PROJECT:        GDI3D DLL
     PROGRAMMER(S):  Pasi Paavola
     COMPILER:       Microsoft C/C++ 7.0
     ENVIRONMENT:    Windows 3.1 running on 386/33/SuperVGA/no 80x87;
                     386 enhanced mode
     ROUTINES:       Line drawing & moving routines
*/


////////////////////////////////////////////////////////////////////////////
/*

G3MoveTo() moves the current position to the position specified
by the point pointed by argument lpG3Point.

Parameter           Description

lpG3Point           Far pointer to the 3D point

Returns:
Return value contains the previous position (x in low word,
y in high word). The return value is in output window coordinates.

Comments


*/
////////////////////////////////////////////////////////////////////////////

DWORD WINAPI_LIB G3MoveTo(LPG3POINT lpG3Point)
{
    POINT p;

    p = G3ToViewport(lpG3Point->x, lpG3Point->y, lpG3Point->z);
    return MoveTo(GhDC, p.x, p.y);
}

////////////////////////////////////////////////////////////////////////////
/*

G3LineTo() draws a line from the current position to the position specified
by the point pointed by argument lpG3Point.

Parameter           Description

lpG3Point           Far pointer to the destination 3D point

Returns
TRUE, if successful, otherwise FALSE

Comments


*/
////////////////////////////////////////////////////////////////////////////

BOOL WINAPI_LIB G3LineTo(LPG3POINT lpG3Point)
{
    POINT p;

    p = G3ToViewport(lpG3Point->x, lpG3Point->y, lpG3Point->z);
    return LineTo(GhDC, p.x, p.y);

}


////////////////////////////////////////////////////////////////////////////
/*

G3Box() draws a box in 3D. The edges of the box are always parallel
to some of the axes. All edges are drawn (no hidden line removal).

Parameter           Description

x1, x2              Limits in x-direction
y1, y2              Limits in y-direction
z1, z2              Limits in z-direction

Returns

Comments


*/
////////////////////////////////////////////////////////////////////////////

VOID WINAPI_LIB G3Box(double x1, double x2, double y1, double y2,
                           double z1, double z2)

{
POINT c1, c2, c3, c4, c5, c6, c7, c8;  // Corner points

// Generate 8 corner points

c1 = G3ToViewport(x2, y1, z1);
c2 = G3ToViewport(x2, y2, z1);
c3 = G3ToViewport(x1, y2, z1);
c4 = G3ToViewport(x1, y1, z1);
c5 = G3ToViewport(x2, y1, z2);
c6 = G3ToViewport(x2, y2, z2);
c7 = G3ToViewport(x1, y2, z2);
c8 = G3ToViewport(x1, y1, z2);

// Draw necessary lines

MoveTo(GhDC, c1.x, c1.y);
LineTo(GhDC, c2.x, c2.y);
LineTo(GhDC, c6.x, c6.y);
LineTo(GhDC, c5.x, c5.y);
LineTo(GhDC, c1.x, c1.y);
LineTo(GhDC, c4.x, c4.y);
LineTo(GhDC, c3.x, c3.y);
LineTo(GhDC, c7.x, c7.y);
LineTo(GhDC, c8.x, c8.y);
LineTo(GhDC, c4.x, c4.y);
MoveTo(GhDC, c2.x, c2.y);
LineTo(GhDC, c3.x, c3.y);
MoveTo(GhDC, c6.x, c6.y);
LineTo(GhDC, c7.x, c7.y);
MoveTo(GhDC, c5.x, c5.y);
LineTo(GhDC, c8.x, c8.y);

}