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Lexxy Fox
parent
04fac81a8e
commit
6200685e52
95
glxgears.c
95
glxgears.c
@ -12,13 +12,11 @@
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/* Conversion to GLUT by Mark J. Kilgard */
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#include <math.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "glut_wrap.h"
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static GLint T0 = 0;
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static GLint Frames = 0;
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@ -28,7 +26,6 @@ static GLboolean Visible = GL_TRUE;
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static GLboolean Animate = GL_TRUE;
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static GLfloat viewDist = 40.0;
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/**
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Draw a gear wheel. You'll probably want to call this function when
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@ -42,10 +39,10 @@ static GLfloat viewDist = 40.0;
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**/
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static void
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gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
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GLint teeth, GLfloat tooth_depth)
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{
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static void gear(
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GLfloat inner_radius, GLfloat outer_radius, GLfloat width, GLint teeth,
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GLfloat tooth_depth
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) {
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GLint i;
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GLfloat r0, r1, r2;
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GLfloat angle, da;
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@ -69,7 +66,9 @@ gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
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glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
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if (i < teeth) {
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glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
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glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
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glVertex3f(
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r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5
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);
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}
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}
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glEnd();
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@ -96,7 +95,9 @@ gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
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glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
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glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
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if (i < teeth) {
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glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
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glVertex3f(
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r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5
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);
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glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
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}
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}
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@ -108,8 +109,12 @@ gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
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for (i = 0; i < teeth; i++) {
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angle = i * 2.0 * M_PI / teeth;
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glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
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glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
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glVertex3f(
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r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5
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);
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glVertex3f(
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r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5
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);
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glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
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glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
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}
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@ -132,12 +137,16 @@ gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
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glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
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glNormal3f(cos(angle), sin(angle), 0.0);
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glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5);
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glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
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glVertex3f(
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r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5
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);
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u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
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v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
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glNormal3f(v, -u, 0.0);
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glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
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glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
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glVertex3f(
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r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5
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);
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glNormal3f(cos(angle), sin(angle), 0.0);
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}
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@ -157,25 +166,20 @@ gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
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glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
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}
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glEnd();
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}
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static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
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static GLint gear1, gear2, gear3;
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static GLfloat angle = 0.0;
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static void
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cleanup(void)
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{
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static void cleanup(void) {
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glDeleteLists(gear1, 1);
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glDeleteLists(gear2, 1);
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glDeleteLists(gear3, 1);
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glutDestroyWindow(win);
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}
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static void
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draw(void)
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{
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static void draw(void) {
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glPushMatrix();
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@ -227,14 +231,10 @@ draw(void)
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}
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}
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static void
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idle(void)
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{
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static void idle(void) {
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static double t0 = -1.;
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double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
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if (t0 < 0.0)
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t0 = t;
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if (t0 < 0.0) t0 = t;
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dt = t - t0;
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t0 = t;
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@ -244,9 +244,7 @@ idle(void)
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glutPostRedisplay();
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}
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static void
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update_idle_func(void)
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{
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static void update_idle_func(void) {
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if (Visible && Animate)
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glutIdleFunc(idle);
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else
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@ -255,9 +253,7 @@ update_idle_func(void)
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/* change view angle, exit upon ESC */
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/* ARGSUSED1 */
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static void
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key(unsigned char k, int x, int y)
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{
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static void key(unsigned char k, int, int) {
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switch (k) {
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case 'z':
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view_rotz += 5.0;
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@ -287,9 +283,7 @@ key(unsigned char k, int x, int y)
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/* change view angle */
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/* ARGSUSED1 */
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static void
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special(int k, int x, int y)
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{
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static void special(int k, int, int) {
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switch (k) {
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case GLUT_KEY_UP:
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view_rotx += 5.0;
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@ -310,9 +304,7 @@ special(int k, int x, int y)
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}
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/* new window size or exposure */
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static void
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reshape(int width, int height)
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{
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static void reshape(int width, int height) {
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GLfloat h = (GLfloat)height / (GLfloat)width;
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glViewport(0, 0, (GLint)width, (GLint)height);
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@ -322,9 +314,7 @@ reshape(int width, int height)
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glMatrixMode(GL_MODELVIEW);
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}
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static void
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init(int argc, char *argv[])
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{
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static void init(int argc, char *argv[]) {
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static GLfloat pos[4] = {5.0, 5.0, 10.0, 0.0};
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static GLfloat red[4] = {0.8, 0.1, 0.0, 1.0};
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static GLfloat green[4] = {0.0, 0.8, 0.2, 1.0};
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@ -365,28 +355,22 @@ init(int argc, char *argv[])
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printf("GL_VENDOR = %s\n", (char *)glGetString(GL_VENDOR));
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printf("GL_EXTENSIONS = %s\n", (char *)glGetString(GL_EXTENSIONS));
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fflush(stdout);
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}
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else if ( strcmp(argv[i], "-exit")==0) {
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} else if (strcmp(argv[i], "-exit") == 0) {
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autoexit = 30;
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printf("Auto Exit after %i seconds.\n", autoexit);
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fflush(stdout);
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}
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else if (strcmp(argv[i], "-noanim") == 0) {
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} else if (strcmp(argv[i], "-noanim") == 0) {
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Animate = GL_FALSE;
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}
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}
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}
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static void
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visible(int vis)
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{
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static void visible(int vis) {
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Visible = vis;
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update_idle_func();
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}
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int main(int argc, char *argv[])
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{
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int main(int argc, char *argv[]) {
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glutInitWindowSize(300, 300);
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glutInit(&argc, argv);
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glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
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@ -403,4 +387,3 @@ int main(int argc, char *argv[])
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glutMainLoop();
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return 0; /* ANSI C requires main to return int. */
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}
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