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outrun.c
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// OpenGL graphics program exploring geometry
#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <math.h>
#define PI 3.141592
GLfloat theta = 0.0;
double rot = 0;
double scalefactor = (2.0*PI); //const
int detail=1;
int gridOffset=0;
double distance = 0;
double offset = 0;
double speed = 1.0;
void display(){
//Setup
glClearColor(0,0,0,0);
glPointSize(4.0);
glLineWidth(1.5);
glEnable(GL_CULL_FACE);
glPushMatrix();
//camera stuff
configcamera();
// Background:
cube2();
//scene:
grid(10,10,10);
car();
sun();
gnd();
//cleanup
glPopMatrix();
glutSwapBuffers();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
void configcamera(){
glTranslatef(0,0.5,-10);
glRotatef(1,1,0,0);
wobble();
}
void wobble(){
// glRotatef(sin(theta*360/3.14/32)*1,1,0,0);
glRotatef(cos(theta*90/3.14/47)*5,0,1,0);
}
void sun(){
glPushMatrix();
glTranslatef(0,0,-150);
glScalef(.5,.5,.5);
glBegin(GL_POLYGON);
glColor3f(1,0,0);
glVertex3f( 0, 30,0);
glColor3f(1,0.3,0);
glVertex3f(-21, 21,0);
glColor3f(1,1,0);
glVertex3f(-30, 0,0);
glVertex3f( 30, 0,0);
glColor3f(1,0.3,0);
glVertex3f( 21, 21,0);
glEnd();
glPopMatrix();
}
void gnd(){
glPushMatrix();
glTranslatef(0,-2,0);
glScalef(1000,1000,1000);
glBegin(GL_POLYGON);
glColor3f(.1,0,.1);
glVertex3f(-1,0, 1);
glVertex3f( 1,0, 1);
glVertex3f( 1,0,-1);
glVertex3f(-1,0,-1);
glEnd();
glPopMatrix();
glPushMatrix();
glTranslatef(0,-1.0,0);
glTranslatef(0,0,-10);
glScalef(1,1000,1000);
glTranslatef(0,0,-1);
glBegin(GL_POLYGON);
glColor3f(.3,0,.3);
glVertex3f(-1,0, 1);
glVertex3f( 1,0, 1);
glVertex3f( 1,0,-1);
glVertex3f(-1,0,-1);
glEnd();
glPopMatrix();
glPushMatrix();
glTranslatef(0,-1.001,0);
glTranslatef(0,0,10);
glScalef(1,1000,1000);
glTranslatef(0,0,1);
glBegin(GL_POLYGON);
glColor3f(.3,0,.3);
glVertex3f(-1,0, 1);
glVertex3f( 1,0, 1);
glVertex3f( 1,0,-1);
glVertex3f(-1,0,-1);
glEnd();
glPopMatrix();
}
void car(){
glPushMatrix();
glTranslatef(0.5,-1,7+sin(theta/4.0));
glScalef(0.01,0.01,0.01);
glBegin(GL_POLYGON);
// glColor3f(.5,.5,.5);
glColor3f(1,1,1);
glVertex3f(-28, 15, 45);
glVertex3f( 28, 15, 45);
glVertex3f( 28, 15,-45);
glVertex3f(-28, 15,-45);
glEnd();
glBegin(GL_POLYGON);
glColor3f(.25,.25,.25);
// glColor3f(1,1,1);
glVertex3f(-28,15,-45);
glVertex3f( 28,15,-45);
glVertex3f( 28, 5,-45);
glVertex3f(-28, 5,-45);
glEnd();
glBegin(GL_POLYGON);
glColor3f(.25,.25,.25);
// glColor3f(1,1,1);
glVertex3f( 28,15, 45);
glVertex3f(-28,15, 45);
glVertex3f(-28, 5, 45);
glVertex3f( 28, 5, 45);
glEnd();
glBegin(GL_POLYGON);
glColor3f(.6,.6,.6);
// glColor3f(1,1,1);
glVertex3f(-28,15, 45);
glVertex3f(-28,15,-45);
glVertex3f(-28, 5,-45);
glVertex3f(-28, 5, 45);
glEnd();
glBegin(GL_POLYGON);
glColor3f(.6,.6,.6);
// glColor3f(1,1,1);
glVertex3f( 28,15,-45);
glVertex3f( 28,15, 45);
glVertex3f( 28, 5, 45);
glVertex3f( 28, 5,-45);
glEnd();
glBegin(GL_POLYGON);
glColor3f(.2,.2,.2);
// glColor3f(1,1,1);
glVertex3f( 28, 5, 45);
glVertex3f(-28, 5, 45);
glVertex3f(-28, 5,-45);
glVertex3f( 28, 5,-45);
glEnd();
glBegin(GL_POLYGON);
glColor3f(0,0,0);
// glColor3f(1,1,1);
glVertex3f(-28, .01, 45);
glVertex3f( 28, .01, 45);
glVertex3f( 28, .01,-45);
glVertex3f(-28, .01,-45);
glEnd();
glPopMatrix();
}
void grid(int width, int depth, int front){
int xwidth = width;
int far = depth;
int near = front;
distance = theta*3.1415*speed;
gridOffset = (int)distance;
offset = (int)(gridOffset)-distance;
glPushMatrix();
glRotatef(180,0,1,0);
glTranslatef(0,0,offset);
GLfloat source[3][3]=
{{.6,.1,.6},
{.1,.0,.1},
{.2,.2,.4}};
GLfloat terrain[3][3]=
{{.5,.6,.7},
{.6,.7,.8},
{.7,.8,.9}};
GLfloat tile[4]={0};
GLfloat colors[3][3]={0};
for(int c = 0; c<3; c++){
colors[c][0]=source[c][0]*10;
colors[c][1]=source[c][1]*10;
colors[c][2]=source[c][2]*10;
}
for(int i = 0; i< 2; i++){
if(i==1){
for(int c = 0; c<3; c++){
colors[c][0]*=0.5;
colors[c][1]*=0.5;
colors[c][2]*=0.5;
}
glLineWidth(2.0);
}
else glLineWidth(1.1);
for(int q = -xwidth-1; q<=xwidth; q++)
for(int r = -near-1; r<=far; r++){
tile[0]=terrain[(q+30)%3][(r+30+gridOffset)%3];
tile[1]=terrain[(q+30)%3][(r+31+gridOffset)%3];
tile[2]=terrain[(q+31)%3][(r+31+gridOffset)%3];
tile[3]=terrain[(q+31)%3][(r+30+gridOffset)%3];
if (q<2 && q>-2){
tile[0]=.5;
tile[1]=.5;
}
else if (q<3 && q>-3){
tile[0]*=.5+0.25;
tile[1]*=.5+0.25;
}
if (q<1 && q>-3){
tile[2]=.5;
tile[3]=.5;
}
else if (q<2 && q>-4){
tile[2]*=.5+0.25;
tile[3]*=.5+0.25;
}
if(i==0){
glBegin( GL_POLYGON);
glColor3f(colors[1][0]*tile[0]*0.25,
colors[1][1]*tile[0]*0.25,
colors[1][2]*tile[0]*0.25);
if (q<1 && q>-2)
glColor3f(.2,0,.2);
glVertex3f(q ,2.0*tile[0]-2.02, r );
glVertex3f(q ,2.0*tile[1]-2.02, r+1);
glVertex3f(q+1,2.0*tile[2]-2.02, r+1);
glVertex3f(q+1,2.0*tile[3]-2.02, r );
glEnd();
}
glBegin( GL_LINES);
glColor3f(colors[1][0]*tile[0],
colors[1][1]*tile[0],
colors[1][2]*tile[0]);
glVertex3f(q ,2.0*tile[0]-2.0, r );
glVertex3f(q ,2.0*tile[1]-2.0, r+1);
glVertex3f(q ,2.0*tile[0]-2.0, r );
glVertex3f(q+1,2.0*tile[3]-2.0, r );
glEnd();
}
}
// if(offset<-1.0){
// gridOffset++;
// }
// gridOffset=-(int)offset;
glPopMatrix();
}
void cube(){
GLfloat source[3][3]=
{{.4,.2,.2},
{.2,.4,.2},
{.2,.2,.4}};
GLfloat colors[3][3]={0};
for(int c = 0; c<3; c++){
colors[c][0]=source[c][0];
colors[c][1]=source[c][1];
colors[c][2]=source[c][2];
}
for(int i = 0; i< 2; i++){
if(i==1){
for(int c = 0; c<3; c++){
colors[c][0]*=0.5;
colors[c][1]*=0.5;
colors[c][2]*=0.5;
}
glLineWidth(2.0);
}
else glLineWidth(1.1);
glBegin( GL_LINES);
for(int q = -10; q<=10; q++){
glColor3fv ( colors[0]);
glVertex3f( 10, q, 10);
glVertex3f( 10, q,-10);
glVertex3f( 10, 10, q);
glVertex3f( 10,-10, q);
glVertex3f(-10, q, 10);
glVertex3f(-10, q,-10);
glVertex3f(-10, 10, q);
glVertex3f(-10,-10, q);
glColor3fv ( colors[1]);
glVertex3f( q, 10, 10);
glVertex3f( q, 10,-10);
glVertex3f( 10, 10, q);
glVertex3f(-10, 10, q);
glVertex3f( q,-10, 10);
glVertex3f( q,-10,-10);
glVertex3f( 10,-10, q);
glVertex3f(-10,-10, q);
glColor3fv ( colors[2]);
glVertex3f( q, 10, 10);
glVertex3f( q,-10, 10);
glVertex3f( 10, q, 10);
glVertex3f(-10, q, 10);
glVertex3f( q, 10,-10);
glVertex3f( q,-10,-10);
glVertex3f( 10, q,-10);
glVertex3f(-10, q,-10);
}
glEnd();
}
}
void cube2(){
glPushMatrix();
glScalef(100,100,100);
glColor3f(0,0,0.1);
glBegin(GL_POLYGON);
glVertex3f( 10, 10, 10);
glVertex3f( 10, 10,-10);
glVertex3f( 10,-10,-10);
glVertex3f( 10,-10, 10);
glEnd();
glBegin(GL_POLYGON);
glVertex3f(-10, 10,-10);
glVertex3f(-10, 10, 10);
glVertex3f(-10,-10, 10);
glVertex3f(-10,-10,-10);
glEnd();
glBegin(GL_POLYGON);
glVertex3f( 10, 10,-10);
glVertex3f( 10, 10, 10);
glVertex3f(-10, 10, 10);
glVertex3f(-10, 10,-10);
glEnd();
glBegin(GL_POLYGON);
glVertex3f( 10,-10, 10);
glVertex3f( 10,-10,-10);
glVertex3f(-10,-10,-10);
glVertex3f(-10,-10, 10);
glEnd();
glBegin(GL_POLYGON);
glVertex3f( 10,-10, 10);
glVertex3f(-10,-10, 10);
glVertex3f(-10, 10, 10);
glVertex3f( 10, 10, 10);
glEnd();
glBegin(GL_POLYGON);
glVertex3f( 10,-10,-10);
glVertex3f( 10, 10,-10);
glVertex3f(-10, 10,-10);
glVertex3f(-10,-10,-10);
glEnd();
glPopMatrix();
}
void mymotion() {
// usleep(16667);
theta +=1.0/60;
// rot =sin(theta/PI*4)*0.5+0.5;
rot = theta;
if(rot>1){
rot -= (int)rot;
}
glutPostRedisplay();
}
void resize(GLsizei w, GLsizei h){
GLsizei ww,hh;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
GLfloat aspect = (GLfloat) w /(GLfloat) h;
GLfloat fit = 1.5;
if(w > h)
{
gluPerspective(60,aspect,0.01,2000);
}
else
{
gluPerspective(60/aspect,aspect,0.01,2000);
}
glMatrixMode(GL_MODELVIEW);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glEnable(GL_DEPTH_TEST);
glViewport(0,0,w,h);
}
int main(int argc, char** argv){
glutInit( &argc, argv );
glutInitWindowSize(512,512);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB| GLUT_DEPTH );
glutCreateWindow("icosahedral worlds");
glutDisplayFunc( display );
glutIdleFunc( mymotion );
glutReshapeFunc( resize );
glutMainLoop();
return 0;
}