Initial. Don't... just don't ask.
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Ryan McGrath
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332
threeDKit/planinit.c
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332
threeDKit/planinit.c
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/*
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3DKIT version 1.3
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High speed 3D graphics and rendering library for Linux.
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1996 Paul Sheer psheer@icon.co.za
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This file is an example program demonstrating the use of the
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3dkit library. It is not part of the library and is not copyright.
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The author take no responsibility, for the results
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of compilation, execution or other usage of this program.
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*/
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/*
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File: planinit.c
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*/
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/* The following define the plane's geometry:
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I once had a list of what every variable did,
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not any more, but I'll label those that I know. */
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/*fuselage radius*/
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#define FRAD (float) 1.1
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/*length of tapered portion of fuselage*/
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#define FD 8
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/*length of various other portions*/
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#define FB (float)2.65
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#define FA (float)2.78
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#define FC (float)3.80
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#define FE (float)1.75
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#define QM (float).4
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#define QM2 (float).15
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#define WH (float).5
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/*wing span*/
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#define SPAN 20
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/*root chord length*/
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#define CHORD 3
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/*wing dihedral*/
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#define DIHEDRAL (float).12
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/*wing taper*/
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#define TAPER .4
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#define PRAT (float)M_PI/3
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/*elevation of stabiliser*/
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#define TAILHEIGHT (float)2.8
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/*stabiliser chord, dihedral, taper and span*/
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#define TCHORD (float)1.2
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#define TDIHEDRAL (float).02
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#define TTAPER (float).7
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#define TSPAN 5
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/*fin length*/
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#define VLENGTH (float)2.3
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/*fin base elevation, taper, base chord*/
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#define VHEIGHT (float).5
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#define VTAPER (float).7
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#define VCHORD (float)1.7
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/*distance between propeller centres*/
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#define PROPSPAN 4
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/*nacelle radius, length, and two other shape params*/
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#define NACRAD (float).4
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#define NACLEN (float)1.6
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#define RNACLEN (float)2.4
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#define NACHEIGHT (float).4
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#include <stdarg.h>
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#include <stdlib.h>
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#include <math.h>
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#include "vga.h"
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#include "vgagl.h"
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#include "./3dkit.h"
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#include "./plane.h"
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extern int DENS;
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extern int DENS2;
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float rib[20][3] =
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{{-29.7, 0, 0}, {-29.5, 1, 0}, {-29, 2, 0},
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{-28, 3, 0}, {-25, 5.3, 0}, {-20, 6.7, 0}, {-12, 8, 0},
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{1, 9, 0}, {19, 9, 0}, {39, 7.5, 0}, {59, 4.5, 0}, {82, 0, 0}};
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void initwing (TD_Surface * surf, int lsf, int usd, int half)
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{
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int i, k;
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float j;
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int LSC = 110;
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int widtth, length;
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surf->l = widtth = 12;
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surf->w = length = DENS2 + 1;
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for (k = 0; k < length; k++)
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for (i = 0; i < widtth; i++) {
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j = k;
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if (lsf * usd == -1)
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j = length - k - 1;
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j = j / 4 + (float) DENS2 *half / 4;
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surf->point[i * length + k].x = (float) ((float) j / DENS2 * (SPAN / 2 - FRAD) + FRAD) * lsf * PL_METER;
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surf->point[i * length + k].y = -(float) rib[i][0] / LSC * CHORD * (1 - (float) j / DENS2 * (1 - TAPER)) * PL_METER;
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surf->point[i * length + k].z = ((float) rib[i][1] / LSC * CHORD * usd * (1 - (float) j / DENS2 * (1 - TAPER))
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/ ((float) 1.5 - (float) usd / 2) - WH + (float) j / DENS2 * DIHEDRAL * SPAN / 2) * PL_METER;
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}
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}
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void inittips (TD_Surface * surf, int lsf)
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{
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int i, k, j, usd;
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int LSC = 110;
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int widtth, length;
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surf->l = widtth = 12;
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surf->w = length = 2;
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for (j = 0, k = -1; k < 2; k += 2, j++)
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for (i = 0; i < widtth; i++) {
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usd = -k * lsf;
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surf->point[i * length + j].x = (float) ((float) (SPAN / 2 - FRAD) + FRAD) * lsf * PL_METER;
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surf->point[i * length + j].y = -(float) rib[i][0] / LSC * CHORD * (1 - (float) (1 - TAPER)) * PL_METER;
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surf->point[i * length + j].z = ((float) rib[i][1] / LSC * CHORD * usd * (1 - (float) (1 - TAPER)) /
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((float) 1.5 - (float) usd / 2) - WH + (float) DIHEDRAL * SPAN / 2) * PL_METER;
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}
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}
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void initstab (TD_Surface * surf, int lsf, int usd)
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{
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int i, j, k;
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int LSC = 110;
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int widtth, length;
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surf->l = widtth = 12;
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surf->w = length = DENS2 + 1;
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for (k = 0; k < length; k++)
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for (i = 0; i < widtth; i++) {
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j = k;
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if (lsf * usd == -1)
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j = length - k - 1;
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surf->point[i * length + k].x = (float) j / DENS2 * TSPAN / 2 * lsf * PL_METER;
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surf->point[i * length + k].y = (-(float) rib[i][0] / LSC * TCHORD * (1 - (float) j / DENS2 * (1 - TTAPER)) - FB - FD) * PL_METER;
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surf->point[i * length + k].z = ((float) rib[i][1] / LSC * TCHORD * usd * (1 - (float) j / DENS2 * (1 - TTAPER)) / 2 + TAILHEIGHT + (float) j / DENS2 * TDIHEDRAL * TSPAN / 2) * PL_METER;
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}
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}
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void initfin (TD_Surface * surf, int usd)
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{
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int i, j, k;
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int LSC = 110;
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int widtth, length;
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float locrad;
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surf->l = widtth = 12;
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surf->w = length = DENS2 + 1;
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locrad = (sin ((float) M_PI / 2 * VCHORD / FD)) * FRAD;
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for (k = 0; k < length; k++)
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for (i = 0; i < widtth; i++) {
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j = k;
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if (usd == 1)
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j = length - k - 1;
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surf->point[i * length + k].x = ((float) rib[i][1] / LSC * VCHORD * usd * (1 - (float) j / DENS2 * (1 - VTAPER)) / 2) * PL_METER;
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surf->point[i * length + k].y = (-(float) rib[i][0] / LSC * VCHORD * (1 - (float) j / DENS2 * (1 - VTAPER)) - FB - FD - (float) VCHORD / 2 * ((float) j / DENS2 - 1)) * PL_METER;
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surf->point[i * length + k].z = ((float) j / DENS2 * (TAILHEIGHT - locrad) + locrad) * PL_METER;
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}
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}
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void initfus (TD_Surface * surf, float quart)
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{
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int i, j;
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int widtth, length;
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float locrad;
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surf->w = widtth = surf->l = length = DENS + 1;
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for (j = length - 1; j >= 0; j--)
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for (i = 0; i < widtth; i++) {
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locrad = (sin ((float) M_PI / 2 * j / DENS + .02)) * FRAD;
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surf->point[i + j * widtth].x = (float) cos ((float) i / DENS * M_PI / 2 + quart) * PL_METER * locrad;
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surf->point[i + j * widtth].y = ((float) j / DENS * FD - FB - FD) * PL_METER;
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surf->point[i + j * widtth].z = (float) sin ((float) i / DENS * M_PI / 2 + quart) * PL_METER * locrad;
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}
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}
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void initfus1 (TD_Surface * surf, float quart)
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{
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int i, j;
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int widtth, length;
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float locrad;
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surf->w = widtth = surf->l = length = DENS + 1;
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for (j = length - 1; j >= 0; j--)
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for (i = 0; i < widtth; i++) {
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locrad = FRAD;
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surf->point[i + j * widtth].x = (float) cos ((float) i / DENS * M_PI / 2 + quart) * PL_METER * locrad;
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surf->point[i + j * widtth].y = ((float) j / DENS * (FA + FB) - FB) * PL_METER;
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surf->point[i + j * widtth].z = (float) sin ((float) i / DENS * M_PI / 2 + quart) * PL_METER * locrad;
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}
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}
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void initfus2 (TD_Surface * surf, float quart)
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{
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int i, j;
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int widtth, length;
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float locrad, ya, q;
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surf->w = widtth = surf->l = length = DENS + 1;
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for (j = length - 1; j >= 0; j--)
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for (i = 0; i < widtth; i++) {
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ya = ((float) j / DENS * FC + FA);
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locrad = (cos ((float) PRAT * j / DENS)) * FRAD;
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q = (ya - FA) / FC * QM;
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surf->point[i + j * widtth].x = ((float) cos ((float) i / DENS * M_PI / 2 + quart) * locrad) * PL_METER;
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surf->point[i + j * widtth].y = ya * PL_METER;
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surf->point[i + j * widtth].z = ((float) sin ((float) i / DENS * M_PI / 2 + quart) * locrad - q) * PL_METER;
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}
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}
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void initfus3 (TD_Surface * surf, float quart)
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{
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int i, j;
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int widtth, length;
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float ya, locrad, q;
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surf->w = widtth = surf->l = length = DENS + 1;
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for (j = length - 1; j >= 0; j--)
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for (i = 0; i < widtth; i++) {
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ya = ((float) j / DENS * FE + (float) FA + (float) FC);
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locrad = (cos ((float) PRAT)) * FRAD * sqrt ((float) ((float) FE - ya + (float) FA + (float) FC + .01) / FE);
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q = QM + (ya - FA - FC) / FE * QM2;
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surf->point[i + j * widtth].x = ((float) cos ((float) i / DENS * M_PI / 2 + quart) * locrad) * PL_METER;
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surf->point[i + j * widtth].y = ya * PL_METER;
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surf->point[i + j * widtth].z = ((float) sin ((float) i / DENS * M_PI / 2 + quart) * locrad - q) * PL_METER;
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}
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}
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void initnacelle (TD_Surface * surf, float quart, int lor)
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{
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int i, j;
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int widtth, length;
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float xa, ya, za, locrad, q, nz, ny;
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surf->w = widtth = surf->l = length = DENS + 1;
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nz = (float) DIHEDRAL *PROPSPAN - WH + NACHEIGHT;
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ny = (float) .27 *CHORD - (.27 * CHORD * PROPSPAN / SPAN / 2);
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for (j = length - 1; j >= 0; j--)
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for (i = 0; i < widtth; i++) {
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ya = ((float) j / DENS * NACLEN + ny);
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locrad = (float) NACRAD *sqrt ((float) ((float) NACLEN + ny - ya + .01) / NACLEN);
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q = 0;
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xa = (float) cos ((float) i / DENS * M_PI / 2 + quart) * locrad;
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surf->point[i + j * widtth].x = (xa + lor * PROPSPAN) * PL_METER;
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surf->point[i + j * widtth].y = ya * PL_METER;
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if (quart > 1.6) {
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za = (float) sin ((float) i / DENS * M_PI / 2 + quart) * locrad * 2.5 - q; /*%%%%%%%%%% */
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} else {
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za = (float) sin ((float) i / DENS * M_PI / 2 + quart) * locrad - q; /*%%%%%%%%%% */
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}
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surf->point[i + j * widtth].z = (za + nz) * PL_METER;
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}
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}
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void initnacelle2 (TD_Surface * surf, float quart, int lor)
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{
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int i, j;
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int widtth, length;
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float xa, ya, za, locrad, q, nz, ny;
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surf->w = widtth = surf->l = length = DENS + 1;
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nz = (float) DIHEDRAL *PROPSPAN - WH + NACHEIGHT;
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ny = (float) .27 *CHORD - (.27 * CHORD * PROPSPAN / SPAN / 2);
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for (j = 0; j < length; j++)
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for (i = 0; i < widtth; i++) {
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ya = ((float) -j / DENS * RNACLEN + ny);
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locrad = (float) NACRAD *sqrt ((float) -((float) -RNACLEN + ny - ya - .01) / RNACLEN);
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q = 0;
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xa = (float) cos ((float) i / DENS * M_PI / 2 + quart) * locrad;
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surf->point[i * length + j].x = (xa + lor * PROPSPAN) * PL_METER;
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surf->point[i * length + j].y = ya * PL_METER;
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za = (float) sin ((float) i / DENS * M_PI / 2 + quart) * locrad - q;
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surf->point[i * length + j].z = (za + nz) * PL_METER;
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}
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}
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