int main()
{
char fractal;
int x=width/2,y=height/2,radius=width/3;
int margin=20;
int x1=margin,x2=width-margin,x3=width/2,y1=margin,y2=margin,y3=height-margin;
gfx_open(width,height,"Fractals");
gfx_clear_color(0,0,0);
gfx_clear();
gfx_color(255,255,255);
printf("Which fractal would you like to see?\n1: Sierpinski Triangles\n2: Shrinking Squares\n3: Spiral Squares\n4: Circular Lace\n5: Snowflake\n6: Tree\n7: Fern\n8: Spiral of Spirals\n\n");
while(fractal!='q'){
fractal=gfx_wait();
gfx_clear();
switch(fractal){
case 'q':
return 0;
break;
case '1':
printf("Sierpinski Triangles\n\n");
sierpTriangles(x1,y1,x2,y2,x3,y3);
break;
case '2':
printf("Shrinking Squares\n\n");
shrinkSquares(x,y,width/4);
break;
case '3':
printf("Spiral Squares\n\n");
spiralSquares(x,y,-M_PI/4,width*2/3);
break;
case '4':
printf("Circular Lace\n\n");
circularLace(x,y,width);
break;
case '5':
printf("Snowflake\n\n");
snowflake(x,y,radius);
break;
case '6':
printf("Tree\n\n");
tree(x,height,x,height*3/4,0,height/4);
break;
case '7':
printf("Fern\n\n");
fern(width/2,height-margin,2*height/3,0);
break;
case '8':
printf("Spiral of Spirals\n\n");
spiralSpirals(x,y,0,width);
break;
default:
printf("Please enter a valid option\n\n");
break;
}
}
}
void snowflake(int xcenter, int ycenter, int length){
if(length<1) return; //check for base case
float angle=2*M_PI/5; //drawing step
int i,xnew[5],ynew[5];
for(i=1;i<=5;i++){
xnew[i-1]=xcenter+length*cos(i*angle+3*M_PI/2);
ynew[i-1]=ycenter+length*sin(i*angle+3*M_PI/2);
gfx_line(xcenter,ycenter,xnew[i-1],ynew[i-1]);
}
int newLength=length*.38; //recursive step
for(i=0;i<5;i++) snowflake(xnew[i],ynew[i],newLength);
}
int main_snowflake(int argc, char **argv)
{
if (argc < 3) {
printf("Usage:\n");
printf("%s [depth] [side]\n", argv[0]);
exit(1);
}
startTurtle();
snowflake(atoi(argv[1]), atoi(argv[2]));
pause();
return 0;
}
void generateSnow() {
double x = rand() % SCREEN_WIDTH + 1;
double y = 0;
dPoint velocity;
velocity.x = ((rand() % 100) / 100.0) - 0.25;
velocity.y = ((rand() % 10) / 10.0) + 1;
Particle snowflake(x, y, velocity.x, velocity.y, 2, 2, 1.0);
snowflakes.push_back(snowflake);
for (unsigned int i = 0; i < snowflakes.size(); i++) {
for (unsigned int j = 0; j < snowflakes.size(); j++) {
if(!snowflakes.at(i).isConnectedToGround()) {
if (snowflakes.at(j).isConnectedToGround()) {
if (snowflakes.at(i).getPositionX() >= snowflakes.at(j).getPositionX() - 3) {
if (snowflakes.at(i).getPositionY() >= snowflakes.at(j).getPositionY()- 3) {
//snowflakes.at(i).connectToGround();
snowflakes.at(i).set_to_be_deleted();
}
}//y position equality check
}//connected to ground check
}
}
}
}
void Workspace::draw()
{
beginLocal();
glBegin( GL_QUADS );
glColor3f( 0.8, 0.9, 1 );
glVertex2i( 0, 0 );
glColor3f( 0.7, 0.8, 1 );
glVertex2i( bounds.w, 0 );
glColor3f( 0.2, 0.3, 0.5 );
glVertex2i( bounds.w, bounds.h );
glColor3f( 0.1, 0.2, 0.4 );
glVertex2i( 0, bounds.h );
glEnd();
#if defined(_WIN32)
//<matt>: "pretty prettier snowflakes" 2-18-06
const float SFSIZE = 4.0;
glColor4f( 1.0, 1.0, 1.0, 0.15 );
if (snowflakes.size() == 0) //how many snowflakes?
// 0 is not snowing, 20 enough, 50 too much, 200 blizzard
{ for (int i = 0; i <= 50; i++)
snowflakes.push_back
(snowflake(rand()%bounds.w, rand()%bounds.h, rand()%360, ((rand()%2)-1.0)/5.0, ((rand()%2)-1.0)/5.0));
}
for (int i = 0; i < snowflakes.size(); i++)
{
snowflakes[i].rz += SFSIZE;
if (snowflakes[i].rz >= 360.0) snowflakes[i].rz = 0.0;
snowflakes[i].px += 0.5 + snowflakes[i].dx;
if (snowflakes[i].px >= bounds.w) snowflakes[i].px = 0.0;
snowflakes[i].py += 0.5 + snowflakes[i].dy;
if (snowflakes[i].py >= bounds.h) snowflakes[i].py = 0.0;
glPushMatrix();
glTranslatef(snowflakes[i].px, snowflakes[i].py, 0.0);
//which is pretier? I think the 2nd one is
//glRotatef(snowflakes[i].rz, 0.0, 0.0, 1.0);
glRotatef(snowflakes[i].rz, 1.0, 0.0, 1.0);
glBegin( GL_TRIANGLES );
glVertex2f( - SFSIZE, + SFSIZE);
glVertex2f( 0.0, - SFSIZE);
glVertex2f( + SFSIZE, + SFSIZE);
glEnd();
glTranslatef(0.0, SFSIZE/2.0, 0.0);
glBegin( GL_TRIANGLES );
glVertex2f( + SFSIZE, - SFSIZE);
glVertex2f( 0.0, + SFSIZE);
glVertex2f( - SFSIZE, - SFSIZE);
glEnd();
glPopMatrix();
}
//</matt> snowflakes
#endif
endLocal();
drawSubViews();
}
