#include "xlockmore.h"
#include "colors.h"
+#include "sphere.h"
+#include "tube.h"
#ifdef USE_GL /* whole file */
#include <ctype.h>
#include <GL/glu.h>
-
#define SPHERE_SLICES 16 /* how densely to render spheres */
#define SPHERE_STACKS 10
-
#define SMOOTH_TUBE /* whether to have smooth or faceted tubes */
#ifdef SMOOTH_TUBE
{ "+wander", ".wander", XrmoptionNoArg, "False" },
{ "-labels", ".labels", XrmoptionNoArg, "True" },
{ "+labels", ".labels", XrmoptionNoArg, "False" },
+ { "-titles", ".titles", XrmoptionNoArg, "True" },
+ { "+titles", ".titles", XrmoptionNoArg, "False" },
{ "-atoms", ".atoms", XrmoptionNoArg, "True" },
{ "+atoms", ".atoms", XrmoptionNoArg, "False" },
{ "-bonds", ".bonds", XrmoptionNoArg, "True" },
/* shapes */
static void
-unit_tube (Bool wire)
-{
- int i;
- int faces = (scale_down ? TUBE_FACES_2 : TUBE_FACES);
- GLfloat step = M_PI * 2 / faces;
- GLfloat th;
- int z = 0;
-
- /* side walls
- */
- glFrontFace(GL_CCW);
-
-# ifdef SMOOTH_TUBE
- glBegin(wire ? GL_LINES : GL_QUAD_STRIP);
-# else
- glBegin(wire ? GL_LINES : GL_QUADS);
-# endif
-
- for (i = 0, th = 0; i <= faces; i++)
- {
- GLfloat x = cos (th);
- GLfloat y = sin (th);
- glNormal3f(x, 0, y);
- glVertex3f(x, 0.0, y);
- glVertex3f(x, 1.0, y);
- th += step;
-
-# ifndef SMOOTH_TUBE
- x = cos (th);
- y = sin (th);
- glVertex3f(x, 1.0, y);
- glVertex3f(x, 0.0, y);
-# endif
- }
- glEnd();
-
- /* End caps
- */
- for (z = 0; z <= 1; z++)
- {
- glFrontFace(z == 0 ? GL_CCW : GL_CW);
- glNormal3f(0, (z == 0 ? -1 : 1), 0);
- glBegin(wire ? GL_LINE_LOOP : GL_TRIANGLE_FAN);
- if (! wire) glVertex3f(0, z, 0);
- for (i = 0, th = 0; i <= faces; i++)
- {
- GLfloat x = cos (th);
- GLfloat y = sin (th);
- glVertex3f(x, z, y);
- th += step;
- }
- glEnd();
- }
-}
-
-
-static void
-tube (GLfloat x1, GLfloat y1, GLfloat z1,
- GLfloat x2, GLfloat y2, GLfloat z2,
- GLfloat diameter, GLfloat cap_size,
- Bool wire)
-{
- GLfloat length, angle, a, b, c;
-
- if (diameter <= 0) abort();
-
- a = (x2 - x1);
- b = (y2 - y1);
- c = (z2 - z1);
-
- length = sqrt (a*a + b*b + c*c);
- angle = acos (a / length);
-
- glPushMatrix();
- glTranslatef(x1, y1, z1);
- glScalef (length, length, length);
-
- if (c == 0 && b == 0)
- glRotatef (angle / (M_PI / 180), 0, 1, 0);
- else
- glRotatef (angle / (M_PI / 180), 0, -c, b);
-
- glRotatef (-90, 0, 0, 1);
- glScalef (diameter/length, 1, diameter/length);
-
- /* extend the endpoints of the tube by the cap size in both directions */
- if (cap_size != 0)
- {
- GLfloat c = cap_size/length;
- glTranslatef (0, -c, 0);
- glScalef (1, 1+c+c, 1);
- }
-
- unit_tube (wire);
- glPopMatrix();
-}
-
-
-/* lifted from glplanet */
-/* Function for determining points on the surface of the sphere */
-static void
-parametric_sphere (float theta, float rho, GLfloat *vector)
-{
- vector[0] = -sin(theta) * sin(rho);
- vector[1] = cos(theta) * sin(rho);
- vector[2] = cos(rho);
-}
-
-/* lifted from glplanet */
-static void
-unit_sphere (Bool wire)
+sphere (GLfloat x, GLfloat y, GLfloat z, GLfloat diameter, Bool wire)
{
int stacks = (scale_down ? SPHERE_STACKS_2 : SPHERE_STACKS);
int slices = (scale_down ? SPHERE_SLICES_2 : SPHERE_SLICES);
- int i, j;
- float drho, dtheta;
- float rho, theta;
- GLfloat vector[3];
- GLfloat ds, dt, t, s;
-
- if (!do_bonds && !scale_down) /* if balls are bigger, be smoother... */
- slices *= 2, stacks *= 2;
-
- if (!wire)
- glShadeModel(GL_SMOOTH);
-
- /* Generate a sphere with quadrilaterals.
- * Quad vertices are determined using a parametric sphere function.
- * For fun, you could generate practically any parameteric surface and
- * map an image onto it.
- */
- drho = M_PI / stacks;
- dtheta = 2.0 * M_PI / slices;
- ds = 1.0 / slices;
- dt = 1.0 / stacks;
-
- glFrontFace(GL_CCW);
- glBegin( wire ? GL_LINE_LOOP : GL_QUADS );
-
- t = 0.0;
- for (i=0; i < stacks; i++) {
- rho = i * drho;
- s = 0.0;
- for (j=0; j < slices; j++) {
- theta = j * dtheta;
-
- glTexCoord2f (s,t);
- parametric_sphere (theta, rho, vector);
- glNormal3fv (vector);
- parametric_sphere (theta, rho, vector);
- glVertex3f (vector[0], vector[1], vector[2]);
-
- glTexCoord2f (s,t+dt);
- parametric_sphere (theta, rho+drho, vector);
- glNormal3fv (vector);
- parametric_sphere (theta, rho+drho, vector);
- glVertex3f (vector[0], vector[1], vector[2]);
-
- glTexCoord2f (s+ds,t+dt);
- parametric_sphere (theta + dtheta, rho+drho, vector);
- glNormal3fv (vector);
- parametric_sphere (theta + dtheta, rho+drho, vector);
- glVertex3f (vector[0], vector[1], vector[2]);
-
- glTexCoord2f (s+ds, t);
- parametric_sphere (theta + dtheta, rho, vector);
- glNormal3fv (vector);
- parametric_sphere (theta + dtheta, rho, vector);
- glVertex3f (vector[0], vector[1], vector[2]);
-
- s = s + ds;
- }
- t = t + dt;
- }
- glEnd();
-}
-
-
-static void
-sphere (GLfloat x, GLfloat y, GLfloat z, GLfloat diameter, Bool wire)
-{
glPushMatrix ();
glTranslatef (x, y, z);
glScalef (diameter, diameter, diameter);
- unit_sphere (wire);
+ unit_sphere (stacks, slices, wire);
glPopMatrix ();
}
}
else
{
+ int faces = (scale_down ? TUBE_FACES_2 : TUBE_FACES);
+# ifdef SMOOTH_TUBE
+ int smooth = True;
+# else
+ int smooth = False;
+# endif
GLfloat thickness = 0.07 * b->strength;
GLfloat cap_size = 0.03;
if (thickness > 0.3)
thickness = 0.3;
+
tube (from->x, from->y, from->z,
to->x, to->y, to->z,
- thickness, cap_size, wire);
+ thickness, cap_size,
+ faces, smooth, wire);
}
}
projects / xscreensaver / blobdiff