mirror of
https://gitea.nishi.boats/pyrite-dev/milsko
synced 2026-01-09 19:03:29 +00:00
better layout
git-svn-id: http://svn2.nishi.boats/svn/milsko/trunk@343 b9cfdab3-6d41-4d17-bbe4-086880011989
This commit is contained in:
NishiOwO
244
examples/gldemos/gears.c
Normal file
244
examples/gldemos/gears.c
Normal file
@@ -0,0 +1,244 @@
|
||||
/* $Id$ */
|
||||
#define TITLE "gears"
|
||||
#include "glutlayer.c"
|
||||
|
||||
/*
|
||||
* 3-D gear wheels. This program is in the public domain.
|
||||
*
|
||||
* Brian Paul
|
||||
*/
|
||||
|
||||
/* Conversion to GLUT by Mark J. Kilgard */
|
||||
|
||||
#include <math.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#ifndef M_PI
|
||||
#define M_PI 3.14159265
|
||||
#endif
|
||||
|
||||
/**
|
||||
|
||||
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 / 2.0;
|
||||
r2 = outer_radius + tooth_depth / 2.0;
|
||||
|
||||
da = 2.0 * M_PI / teeth / 4.0;
|
||||
|
||||
glShadeModel(GL_FLAT);
|
||||
|
||||
glNormal3f(0.0, 0.0, 1.0);
|
||||
|
||||
/* draw front face */
|
||||
glBegin(GL_QUAD_STRIP);
|
||||
for(i = 0; i <= teeth; i++) {
|
||||
angle = i * 2.0 * M_PI / teeth;
|
||||
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
|
||||
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
|
||||
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
|
||||
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
|
||||
}
|
||||
glEnd();
|
||||
|
||||
/* draw front sides of teeth */
|
||||
glBegin(GL_QUADS);
|
||||
da = 2.0 * M_PI / teeth / 4.0;
|
||||
for(i = 0; i < teeth; i++) {
|
||||
angle = i * 2.0 * M_PI / teeth;
|
||||
|
||||
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
|
||||
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
|
||||
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5);
|
||||
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
|
||||
}
|
||||
glEnd();
|
||||
|
||||
glNormal3f(0.0, 0.0, -1.0);
|
||||
|
||||
/* draw back face */
|
||||
glBegin(GL_QUAD_STRIP);
|
||||
for(i = 0; i <= teeth; i++) {
|
||||
angle = i * 2.0 * M_PI / teeth;
|
||||
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
|
||||
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
|
||||
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
|
||||
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
|
||||
}
|
||||
glEnd();
|
||||
|
||||
/* draw back sides of teeth */
|
||||
glBegin(GL_QUADS);
|
||||
da = 2.0 * M_PI / teeth / 4.0;
|
||||
for(i = 0; i < teeth; i++) {
|
||||
angle = i * 2.0 * M_PI / teeth;
|
||||
|
||||
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
|
||||
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
|
||||
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
|
||||
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
|
||||
}
|
||||
glEnd();
|
||||
|
||||
/* draw outward faces of teeth */
|
||||
glBegin(GL_QUAD_STRIP);
|
||||
for(i = 0; i < teeth; i++) {
|
||||
angle = i * 2.0 * M_PI / teeth;
|
||||
|
||||
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
|
||||
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
|
||||
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, 0.0);
|
||||
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
|
||||
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
|
||||
glNormal3f(cos(angle), sin(angle), 0.0);
|
||||
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5);
|
||||
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
|
||||
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, 0.0);
|
||||
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
|
||||
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
|
||||
glNormal3f(cos(angle), sin(angle), 0.0);
|
||||
}
|
||||
|
||||
glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
|
||||
glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
|
||||
|
||||
glEnd();
|
||||
|
||||
glShadeModel(GL_SMOOTH);
|
||||
|
||||
/* draw inside radius cylinder */
|
||||
glBegin(GL_QUAD_STRIP);
|
||||
for(i = 0; i <= teeth; i++) {
|
||||
angle = i * 2.0 * M_PI / teeth;
|
||||
|
||||
glNormal3f(-cos(angle), -sin(angle), 0.0);
|
||||
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
|
||||
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
|
||||
}
|
||||
glEnd();
|
||||
}
|
||||
|
||||
static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
|
||||
static GLint gear1, gear2, gear3;
|
||||
static GLfloat angle = 0.0;
|
||||
|
||||
static void draw(void) {
|
||||
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
||||
|
||||
glPushMatrix();
|
||||
glRotatef(view_rotx, 1.0, 0.0, 0.0);
|
||||
glRotatef(view_roty, 0.0, 1.0, 0.0);
|
||||
glRotatef(view_rotz, 0.0, 0.0, 1.0);
|
||||
|
||||
glPushMatrix();
|
||||
glTranslatef(-3.0, -2.0, 0.0);
|
||||
glRotatef(angle, 0.0, 0.0, 1.0);
|
||||
glCallList(gear1);
|
||||
glPopMatrix();
|
||||
|
||||
glPushMatrix();
|
||||
glTranslatef(3.1, -2.0, 0.0);
|
||||
glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
|
||||
glCallList(gear2);
|
||||
glPopMatrix();
|
||||
|
||||
glPushMatrix();
|
||||
glTranslatef(-3.1, 4.2, 0.0);
|
||||
glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
|
||||
glCallList(gear3);
|
||||
glPopMatrix();
|
||||
|
||||
glPopMatrix();
|
||||
}
|
||||
|
||||
static void idle(void) {
|
||||
angle += 2.0;
|
||||
}
|
||||
|
||||
/* new window size or exposure */
|
||||
static void reshape(int width, int height) {
|
||||
GLfloat h = (GLfloat)height / (GLfloat)width;
|
||||
|
||||
glViewport(0, 0, (GLint)width, (GLint)height);
|
||||
glMatrixMode(GL_PROJECTION);
|
||||
glLoadIdentity();
|
||||
glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
|
||||
glMatrixMode(GL_MODELVIEW);
|
||||
glLoadIdentity();
|
||||
glTranslatef(0.0, 0.0, -40.0);
|
||||
}
|
||||
|
||||
static void init(void) {
|
||||
static GLfloat pos[4] =
|
||||
{5.0, 5.0, 10.0, 0.0};
|
||||
static GLfloat red[4] =
|
||||
{0.8, 0.1, 0.0, 1.0};
|
||||
static GLfloat green[4] =
|
||||
{0.0, 0.8, 0.2, 1.0};
|
||||
static GLfloat blue[4] =
|
||||
{0.2, 0.2, 1.0, 1.0};
|
||||
|
||||
glLightfv(GL_LIGHT0, GL_POSITION, pos);
|
||||
glEnable(GL_CULL_FACE);
|
||||
glEnable(GL_LIGHTING);
|
||||
glEnable(GL_LIGHT0);
|
||||
glEnable(GL_DEPTH_TEST);
|
||||
|
||||
/* make the gears */
|
||||
gear1 = glGenLists(1);
|
||||
glNewList(gear1, GL_COMPILE);
|
||||
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
|
||||
gear(1.0, 4.0, 1.0, 20, 0.7);
|
||||
glEndList();
|
||||
|
||||
gear2 = glGenLists(1);
|
||||
glNewList(gear2, GL_COMPILE);
|
||||
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
|
||||
gear(0.5, 2.0, 2.0, 10, 0.7);
|
||||
glEndList();
|
||||
|
||||
gear3 = glGenLists(1);
|
||||
glNewList(gear3, GL_COMPILE);
|
||||
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
|
||||
gear(1.3, 2.0, 0.5, 10, 0.7);
|
||||
glEndList();
|
||||
|
||||
glEnable(GL_NORMALIZE);
|
||||
}
|
||||
|
||||
static void key(int k) {
|
||||
(void)k;
|
||||
|
||||
if(k == MwLLKeyLeft) {
|
||||
view_roty += 5.0;
|
||||
} else if(k == MwLLKeyRight) {
|
||||
view_roty -= 5.0;
|
||||
} else if(k == MwLLKeyUp) {
|
||||
view_rotx += 5.0;
|
||||
} else if(k == MwLLKeyDown) {
|
||||
view_rotx -= 5.0;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user