mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-27 14:20:34 +05:00
492 lines
13 KiB
C
492 lines
13 KiB
C
/* gears.c */
|
|
|
|
/*
|
|
* 3-D gear wheels. This program is in the public domain.
|
|
*
|
|
* Brian Paul
|
|
*
|
|
*
|
|
* Modified to work under Togl as a widget for TK 1997
|
|
*
|
|
* Philip Quaife
|
|
*
|
|
*/
|
|
|
|
#define USE_TOGL_STUBS
|
|
|
|
#include "togl.h"
|
|
#include <math.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#undef TCL_STORAGE_CLASS
|
|
#define TCL_STORAGE_CLASS DLLEXPORT
|
|
|
|
#ifndef M_PI
|
|
# define M_PI 3.14159265
|
|
#endif
|
|
#define FM_PI ((float) M_PI)
|
|
|
|
#ifdef _MSC_VER
|
|
__inline float
|
|
sinf(double a)
|
|
{
|
|
return (float) sin(a);
|
|
}
|
|
__inline float
|
|
cosf(double a)
|
|
{
|
|
return (float) cos(a);
|
|
}
|
|
__inline float
|
|
sqrtf(double a)
|
|
{
|
|
return (float) sqrt(a);
|
|
}
|
|
|
|
# define sin sinf
|
|
# define cos cosf
|
|
# define sqrt sqrtf
|
|
#endif
|
|
|
|
struct WHIRLYGIZMO
|
|
{
|
|
int Gear1, Gear2, Gear3;
|
|
double Rotx, Roty, Rotz;
|
|
double Angle;
|
|
int Height, Width;
|
|
};
|
|
|
|
typedef struct WHIRLYGIZMO WHIRLYGIZMO;
|
|
|
|
/*
|
|
* Draw a gear wheel. You'll probably want to call this function when
|
|
* building a display list since we do a lot of trig here.
|
|
*
|
|
* Input: inner_radius - radius of hole at center
|
|
* outer_radius - radius at center of teeth
|
|
* width - width of gear
|
|
* teeth - number of teeth
|
|
* tooth_depth - depth of tooth
|
|
*/
|
|
static void
|
|
gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
|
|
GLint teeth, GLfloat tooth_depth)
|
|
{
|
|
GLint i;
|
|
GLfloat r0, r1, r2;
|
|
GLfloat angle, da;
|
|
GLfloat u, v, len;
|
|
|
|
r0 = inner_radius;
|
|
r1 = outer_radius - tooth_depth / 2;
|
|
r2 = outer_radius + tooth_depth / 2;
|
|
|
|
da = 2 * FM_PI / teeth / 4;
|
|
|
|
glShadeModel(GL_FLAT);
|
|
|
|
glNormal3f(0, 0, 1);
|
|
|
|
/* draw front face */
|
|
glBegin(GL_QUAD_STRIP);
|
|
for (i = 0; i <= teeth; i++) {
|
|
angle = i * 2 * FM_PI / teeth;
|
|
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5f);
|
|
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5f);
|
|
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5f);
|
|
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
|
|
width * 0.5f);
|
|
}
|
|
glEnd();
|
|
|
|
/* draw front sides of teeth */
|
|
glBegin(GL_QUADS);
|
|
da = 2 * FM_PI / teeth / 4;
|
|
for (i = 0; i < teeth; i++) {
|
|
angle = i * 2 * FM_PI / teeth;
|
|
|
|
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5f);
|
|
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5f);
|
|
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
|
|
width * 0.5f);
|
|
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
|
|
width * 0.5f);
|
|
}
|
|
glEnd();
|
|
|
|
|
|
glNormal3f(0, 0, -1);
|
|
|
|
/* draw back face */
|
|
glBegin(GL_QUAD_STRIP);
|
|
for (i = 0; i <= teeth; i++) {
|
|
angle = i * 2 * FM_PI / teeth;
|
|
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5f);
|
|
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5f);
|
|
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
|
|
-width * 0.5f);
|
|
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5f);
|
|
}
|
|
glEnd();
|
|
|
|
/* draw back sides of teeth */
|
|
glBegin(GL_QUADS);
|
|
da = 2 * FM_PI / teeth / 4;
|
|
for (i = 0; i < teeth; i++) {
|
|
angle = i * 2 * FM_PI / teeth;
|
|
|
|
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
|
|
-width * 0.5f);
|
|
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
|
|
-width * 0.5f);
|
|
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5f);
|
|
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5f);
|
|
}
|
|
glEnd();
|
|
|
|
|
|
/* draw outward faces of teeth */
|
|
glBegin(GL_QUAD_STRIP);
|
|
for (i = 0; i < teeth; i++) {
|
|
angle = i * 2 * FM_PI / teeth;
|
|
|
|
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5f);
|
|
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5f);
|
|
u = r2 * cos(angle + da) - r1 * cos(angle);
|
|
v = r2 * sin(angle + da) - r1 * sin(angle);
|
|
len = sqrt(u * u + v * v);
|
|
u /= len;
|
|
v /= len;
|
|
glNormal3f(v, -u, 0);
|
|
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5f);
|
|
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5f);
|
|
glNormal3f(cos(angle), sin(angle), 0);
|
|
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
|
|
width * 0.5f);
|
|
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
|
|
-width * 0.5f);
|
|
u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
|
|
v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
|
|
glNormal3f(v, -u, 0);
|
|
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
|
|
width * 0.5f);
|
|
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
|
|
-width * 0.5f);
|
|
glNormal3f(cos(angle), sin(angle), 0);
|
|
}
|
|
|
|
glVertex3f(r1 /* * cos(0) */ , /* r1 * sin(0) */ 0, width * 0.5f);
|
|
glVertex3f(r1 /* * cos(0) */ , /* r1 * sin(0) */ 0, -width * 0.5f);
|
|
|
|
glEnd();
|
|
|
|
|
|
glShadeModel(GL_SMOOTH);
|
|
|
|
/* draw inside radius cylinder */
|
|
glBegin(GL_QUAD_STRIP);
|
|
for (i = 0; i <= teeth; i++) {
|
|
angle = i * 2 * FM_PI / teeth;
|
|
glNormal3f(-cos(angle), -sin(angle), 0);
|
|
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5f);
|
|
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5f);
|
|
}
|
|
glEnd();
|
|
|
|
}
|
|
|
|
/*
|
|
* static GLfloat view_rotx=20, view_roty=30, view_rotz=0; static GLint
|
|
* gear1, gear2, gear3; static GLfloat angle = 0; */
|
|
static GLuint limit;
|
|
static GLuint count = 1;
|
|
|
|
static GLubyte polycolor[4] = { 255, 255, 255, 255 };
|
|
|
|
static int
|
|
draw(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
|
|
{
|
|
WHIRLYGIZMO *Wg;
|
|
Togl *togl;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
Wg = (WHIRLYGIZMO *) Togl_GetClientData(togl);
|
|
glDisable(GL_TEXTURE_2D);
|
|
glPushMatrix();
|
|
glRotatef((float) Wg->Rotx, 1, 0, 0);
|
|
glRotatef((float) Wg->Roty, 0, 1, 0);
|
|
glRotatef((float) Wg->Rotz, 0, 0, 1);
|
|
|
|
glPushMatrix();
|
|
glTranslatef(-3, -2, 0);
|
|
glRotatef((float) Wg->Angle, 0, 0, 1);
|
|
glEnable(GL_DEPTH_TEST);
|
|
glCallList(Wg->Gear1);
|
|
glEnable(GL_DEPTH_TEST);
|
|
glPopMatrix();
|
|
|
|
glPushMatrix();
|
|
glTranslatef(3.1f, -2, 0);
|
|
glRotatef(-2 * (float) Wg->Angle - 9, 0, 0, 1);
|
|
glCallList(Wg->Gear2);
|
|
glPopMatrix();
|
|
|
|
glPushMatrix();
|
|
glTranslatef(-3.1f, 4.2f, 0);
|
|
glRotatef(-2 * (float) Wg->Angle - 25, 0, 0, 1);
|
|
glCallList(Wg->Gear3);
|
|
glPopMatrix();
|
|
|
|
glPopMatrix();
|
|
|
|
Togl_SwapBuffers(togl);
|
|
|
|
return TCL_OK;
|
|
}
|
|
|
|
|
|
static int
|
|
zap(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
|
|
{
|
|
WHIRLYGIZMO *Wg;
|
|
Togl *togl;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
Wg = (WHIRLYGIZMO *) Togl_GetClientData(togl);
|
|
free(Wg);
|
|
|
|
return TCL_OK;
|
|
}
|
|
|
|
|
|
static int
|
|
idle(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
|
|
{
|
|
WHIRLYGIZMO *Wg;
|
|
Togl *togl;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
Wg = (WHIRLYGIZMO *) Togl_GetClientData(togl);
|
|
Wg->Angle += 2;
|
|
Togl_PostRedisplay(togl);
|
|
|
|
return TCL_OK;
|
|
}
|
|
|
|
|
|
/* change view angle, exit upon ESC */
|
|
/*
|
|
* static GLenum key(int k, GLenum mask) { switch (k) { case TK_UP: view_rotx
|
|
* += 5; return GL_TRUE; case TK_DOWN: view_rotx -= 5; return GL_TRUE; case
|
|
* TK_LEFT: view_roty += 5; return GL_TRUE; case TK_RIGHT: view_roty -= 5;
|
|
* return GL_TRUE; case TK_z: view_rotz += 5; return GL_TRUE; case TK_Z:
|
|
* view_rotz -= 5; return GL_TRUE; } return GL_FALSE; } */
|
|
|
|
/* new window size or exposure */
|
|
static int
|
|
reshape(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
int width, height;
|
|
Togl *togl;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
width = Togl_Width(togl);
|
|
height = Togl_Height(togl);
|
|
glViewport(0, 0, (GLint) width, (GLint) height);
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
if (width > height) {
|
|
GLfloat w = (GLfloat) width / (GLfloat) height;
|
|
|
|
glFrustum(-w, w, -1, 1, 5, 60);
|
|
} else {
|
|
GLfloat h = (GLfloat) height / (GLfloat) width;
|
|
|
|
glFrustum(-1, 1, -h, h, 5, 60);
|
|
}
|
|
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
glTranslatef(0, 0, -40);
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
return TCL_OK;
|
|
}
|
|
|
|
|
|
static int
|
|
init(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
|
|
{
|
|
WHIRLYGIZMO *Wg;
|
|
static GLfloat red[4] = { 0.8f, 0.1f, 0, 1 };
|
|
static GLfloat green[4] = { 0, 0.8f, 0.2f, 1 };
|
|
static GLfloat blue[4] = { 0.2f, 0.2f, 1, 1 };
|
|
static GLfloat pos[4] = { 5, 5, 10, 0 };
|
|
Togl *togl;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
glLightfv(GL_LIGHT0, GL_POSITION, pos);
|
|
glEnable(GL_CULL_FACE);
|
|
glEnable(GL_LIGHTING);
|
|
glEnable(GL_LIGHT0);
|
|
glEnable(GL_DEPTH_TEST);
|
|
/* make the gears */
|
|
Wg = (WHIRLYGIZMO *) malloc(sizeof (WHIRLYGIZMO));
|
|
if (!Wg) {
|
|
Tcl_SetResult(Togl_Interp(togl),
|
|
"\"Cannot allocate client data for widget\"", TCL_STATIC);
|
|
}
|
|
Wg->Gear1 = glGenLists(1);
|
|
glNewList(Wg->Gear1, GL_COMPILE);
|
|
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
|
|
gear(1, 4, 1, 20, 0.7f);
|
|
glEndList();
|
|
|
|
Wg->Gear2 = glGenLists(1);
|
|
glNewList(Wg->Gear2, GL_COMPILE);
|
|
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
|
|
gear(0.5f, 2, 2, 10, 0.7f);
|
|
glEndList();
|
|
|
|
Wg->Gear3 = glGenLists(1);
|
|
glNewList(Wg->Gear3, GL_COMPILE);
|
|
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
|
|
gear(1.3f, 2, 0.5f, 10, 0.7f);
|
|
glEndList();
|
|
|
|
glEnable(GL_NORMALIZE);
|
|
Wg->Height = Togl_Height(togl);
|
|
Wg->Width = Togl_Width(togl);
|
|
Wg->Angle = 0;
|
|
Wg->Rotx = 0;
|
|
Wg->Roty = 0;
|
|
Wg->Rotz = 0;
|
|
Togl_SetClientData(togl, (ClientData) Wg);
|
|
|
|
return TCL_OK;
|
|
}
|
|
|
|
static int
|
|
position(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
WHIRLYGIZMO *Wg;
|
|
char Result[100];
|
|
Togl *togl;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
Wg = (WHIRLYGIZMO *) Togl_GetClientData(togl);
|
|
|
|
/* Let result string equal value */
|
|
sprintf(Result, "%g %g", Wg->Roty, Wg->Rotx);
|
|
|
|
Tcl_SetResult(interp, Result, TCL_VOLATILE);
|
|
return TCL_OK;
|
|
}
|
|
|
|
static int
|
|
rotate(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
WHIRLYGIZMO *Wg;
|
|
Togl *togl;
|
|
|
|
if (objc != 4) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName yrot xrot");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
Wg = (WHIRLYGIZMO *) Togl_GetClientData(togl);
|
|
|
|
if (Tcl_GetDoubleFromObj(interp, objv[2], &Wg->Roty) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
if (Tcl_GetDoubleFromObj(interp, objv[3], &Wg->Rotx) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
Togl_PostRedisplay(togl);
|
|
|
|
return TCL_OK;
|
|
}
|
|
|
|
EXTERN int
|
|
Gears_Init(Tcl_Interp *interp)
|
|
{
|
|
/*
|
|
* Initialize Tcl and the Togl widget module.
|
|
*/
|
|
if (Tcl_InitStubs(interp, "8.1", 0) == NULL
|
|
|| Togl_InitStubs(interp, "2.0", 0) == NULL) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
/*
|
|
* Specify the C callback functions for widget creation, display,
|
|
* and reshape.
|
|
*/
|
|
Tcl_CreateObjCommand(interp, "init", init, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "zap", zap, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "draw", draw, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "reshape", reshape, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "idle", idle, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "rotate", rotate, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "position", position, NULL, NULL);
|
|
return TCL_OK;
|
|
}
|