diff options
Diffstat (limited to 'hacks/glx/extrusion-twistoid.c')
| -rw-r--r-- | hacks/glx/extrusion-twistoid.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/hacks/glx/extrusion-twistoid.c b/hacks/glx/extrusion-twistoid.c deleted file mode 100644 index 82034af..0000000 --- a/hacks/glx/extrusion-twistoid.c +++ /dev/null @@ -1,215 +0,0 @@ -/* - * twistoid.c - * - * FUNCTION: - * Show extrusion of open contours. Also, show how torsion is applied. - * - * HISTORY: - * -- linas Vepstas October 1991 - * -- heavily modified to draw corrugated surface, Feb 1993, Linas - * -- modified to demo twistoid March 1993 - * -- port to glut Linas Vepstas March 1995 - */ - -#include "extrusion.h" - -#include <math.h> -#include <stdlib.h> - -/* Some <math.h> files do not define M_PI... */ -#ifndef M_PI -#define M_PI 3.14159265358979323846 -#endif - -/* controls shape of object */ -extern float lastx; -extern float lasty; - -#define OPENGL_10 -/* =========================================================== */ - -#define NUM_TOID1_PTS 5 -static double toid1_points[NUM_TOID1_PTS][3]; -static float toid1_colors [NUM_TOID1_PTS][3]; -static double toid1_twists [NUM_TOID1_PTS]; - -#define TSCALE (6.0) - -#define TPTS(x,y) { \ - toid1_points[i][0] = TSCALE * (x); \ - toid1_points[i][1] = TSCALE * (y); \ - toid1_points[i][2] = TSCALE * (0.0); \ - i++; \ -} - -#define TCOLS(r,g,b) { \ - toid1_colors[i][0] = (r); \ - toid1_colors[i][1] = (g); \ - toid1_colors[i][2] = (b); \ - i++; \ -} - -#define TXZERO() { \ - toid1_twists[i] = 0.0; \ - i++; \ -} - -static void init_toid1_line (void) -{ - int i; - - i=0; - TPTS (-1.1, 0.0); - TPTS (-1.0, 0.0); - TPTS (0.0, 0.0); - TPTS (1.0, 0.0); - TPTS (1.1, 0.0); - - i=0; - TCOLS (0.8, 0.8, 0.5); - TCOLS (0.8, 0.4, 0.5); - TCOLS (0.8, 0.8, 0.3); - TCOLS (0.4, 0.4, 0.5); - TCOLS (0.8, 0.8, 0.5); - - i=0; - TXZERO (); - TXZERO (); - TXZERO (); - TXZERO (); - TXZERO (); -} - -/* =========================================================== */ - -#define SCALE 0.6 -#define TWIST(x,y) { \ - double ax, ay, alen; \ - twistation[i][0] = SCALE * (x); \ - twistation[i][1] = SCALE * (y); \ - if (i!=0) { \ - ax = twistation[i][0] - twistation[i-1][0]; \ - ay = twistation[i][1] - twistation[i-1][1]; \ - alen = 1.0 / sqrt (ax*ax + ay*ay); \ - ax *= alen; ay *= alen; \ - twist_normal [i-1][0] = - ay; \ - twist_normal [i-1][1] = ax; \ - } \ - i++; \ -} - -#define NUM_TWIS_PTS (20) - -static double twistation [NUM_TWIS_PTS][2]; -static double twist_normal [NUM_TWIS_PTS][2]; - -static void init_tripples (void) -{ - int i; - double angle; - double co, si; - - /* outline of extrusion */ - i=0; - /* first, draw a semi-curcular "hump" */ - while (i< 11) { - angle = M_PI * ((double) i) / 10.0; - co = cos (angle); - si = sin (angle); - TWIST ((-7.0 -3.0*co), 1.8*si); - } - - /* now, a zig-zag corrugation */ - while (1) { - if (i >= NUM_TWIS_PTS) break; - TWIST ((-10.0 +(double) i), 0.0); - if (i >= NUM_TWIS_PTS) break; - TWIST ((-9.5 +(double) i), 1.0); - } -} - - -/* =========================================================== */ - -#define V3F(x,y,z) { \ - float vvv[3]; \ - vvv[0] = x; vvv[1] = y; vvv[2] = z; v3f (vvv); \ -} - -#define N3F(x,y,z) { \ - float nnn[3]; \ - nnn[0] = x; nnn[1] = y; nnn[2] = z; n3f (nnn); \ -} - -/* =========================================================== */ - -void DrawStuff_twistoid (void) { - int i; - - toid1_twists[2] = (lastx-121.0) / 8.0; - - i=3; -/* - TPTS (1.0, lasty /400.0); - TPTS (1.1, 1.1 * lasty / 400.0); -*/ - TPTS (1.0, -(lasty-121.0) /200.0); - TPTS (1.1, -1.1 * (lasty-121.0) / 200.0); - -#ifdef IBM_GL_32 - rotate (230, 'x'); - rotate (230, 'y'); - scale (1.8, 1.8, 1.8); - - if (mono_color) { - RGBcolor (178, 178, 204); - twist_extrusion (NUM_TWIS_PTS, twistation, twist_normal, - NULL, NUM_TOID1_PTS, toid1_points, NULL, toid1_twists); - } else { - twist_extrusion (NUM_TWIS_PTS, twistation, twist_normal, - NULL, NUM_TOID1_PTS, toid1_points, toid1_colors, toid1_twists); - } -#endif - -#ifdef OPENGL_10 - glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - glFrontFace(GL_CW); /* jwz */ - - /* set up some matrices so that the object spins with the mouse */ - glPushMatrix (); -/* glTranslatef (0.0, 0.0, -80.0); */ -/* glRotated (43.0, 1.0, 0.0, 0.0); */ -/* glRotated (43.0, 0.0, 1.0, 0.0); */ - glScaled (1.8, 1.8, 1.8); - gleTwistExtrusion (NUM_TWIS_PTS, twistation, twist_normal, - NULL, NUM_TOID1_PTS, toid1_points, NULL, toid1_twists); - glPopMatrix (); -#endif - -} - -/* =========================================================== */ - -void InitStuff_twistoid (void) -{ - int js; - - init_toid1_line (); - init_tripples (); - -#ifdef IBM_GL_32 - js = getjoinstyle (); - js &= ~TUBE_CONTOUR_CLOSED; - setjoinstyle (js); -#endif - -#ifdef OPENGL_10 - js = gleGetJoinStyle (); - js &= ~TUBE_CONTOUR_CLOSED; - gleSetJoinStyle (js); -#endif - -} - -/* ------------------ end of file -------------------- */ |