-/* tube, Copyright (c) 2001, 2003 Jamie Zawinski <jwz@jwz.org>
+/* tube, Copyright (c) 2001, 2003, 2007 Jamie Zawinski <jwz@jwz.org>
* Utility functions to create tubes and cones in GL.
*
* Permission to use, copy, modify, distribute, and sell this software and its
#include "tube.h"
-static void
+static int
unit_tube (int faces, int smooth, int caps_p, int wire_p)
{
int i;
+ int polys = 0;
GLfloat step = M_PI * 2 / faces;
GLfloat s2 = step/2;
GLfloat th;
glVertex3f(x, 1, y);
glVertex3f(x, 0, y);
}
+ polys++;
}
glEnd();
GLfloat y = sin (th);
glVertex3f(x, z, y);
th += step;
+ polys++;
}
glEnd();
}
+ return polys;
}
-static void
+static int
unit_cone (int faces, int smooth, int cap_p, int wire_p)
{
int i;
+ int polys = 0;
GLfloat step = M_PI * 2 / faces;
GLfloat s2 = step/2;
GLfloat th;
if (smooth) glNormal3f(x, 0, y);
glVertex3f(x, 0, y);
+ polys++;
}
glEnd();
GLfloat y = sin (th);
glVertex3f(x, 0, y);
th += step;
+ polys++;
}
glEnd();
}
+ return polys;
}
-static void
+static int
tube_1 (GLfloat x1, GLfloat y1, GLfloat z1,
GLfloat x2, GLfloat y2, GLfloat z2,
GLfloat diameter, GLfloat cap_size,
int cone_p)
{
GLfloat length, X, Y, Z;
+ int polys = 0;
if (diameter <= 0) abort();
Z = (z2 - z1);
if (X == 0 && Y == 0 && Z == 0)
- return;
+ return 0;
length = sqrt (X*X + Y*Y + Z*Z);
}
if (cone_p)
- unit_cone (faces, smooth, caps_p, wire_p);
+ polys = unit_cone (faces, smooth, caps_p, wire_p);
else
- unit_tube (faces, smooth, caps_p, wire_p);
+ polys = unit_tube (faces, smooth, caps_p, wire_p);
glPopMatrix();
+ return polys;
}
-void
+int
tube (GLfloat x1, GLfloat y1, GLfloat z1,
GLfloat x2, GLfloat y2, GLfloat z2,
GLfloat diameter, GLfloat cap_size,
int faces, int smooth, int caps_p, int wire_p)
{
- tube_1 (x1, y1, z1, x2, y2, z2, diameter, cap_size,
- faces, smooth, caps_p, wire_p,
- 0);
+ return tube_1 (x1, y1, z1, x2, y2, z2, diameter, cap_size,
+ faces, smooth, caps_p, wire_p,
+ 0);
}
-void
+int
cone (GLfloat x1, GLfloat y1, GLfloat z1,
GLfloat x2, GLfloat y2, GLfloat z2,
GLfloat diameter, GLfloat cap_size,
int faces, int smooth, int cap_p, int wire_p)
{
- tube_1 (x1, y1, z1, x2, y2, z2, diameter, cap_size,
- faces, smooth, cap_p, wire_p,
- 1);
+ return tube_1 (x1, y1, z1, x2, y2, z2, diameter, cap_size,
+ faces, smooth, cap_p, wire_p,
+ 1);
}