void keyboard(unsigned char key, int x, int y)
{
switch (key) {
case '-':
sealevel -= 0.01;
break;
case '+':
case '=':
sealevel += 0.01;
break;
//more polygons
case 'v':
res = (res-1)*2 + 1;
makemountain();
break;
//less polygons
case 'c':
res = (res-1)/2 + 1;
makemountain();
break;
//speed up
case 'x':
speed += 0.003;
break;
//speed down
case 'z':
speed -= 0.03;
if (speed <= 0.0) {
speed = 0.0;
}
break;
//translate the plane forward.
case ' ':
fly = !fly;
if (fly) {
speed = 0.005;
}
else
speed = 0.0;
break;
//move vertically upward, like a helicopter.
case 'w':
vertical -= 0.01;
break;
//more vertically downward.
case 's':
vertical += 0.01;
break;
//exit
case 'q':
case 27:
exit(0);
break;
}
}
//initialize scene
void init(void)
{
glClearColor(0.5, 0.5, 1.0, 0.0);
/*glShadeModel (GL_FLAT); */
glEnable(GL_DEPTH_TEST);
gluLookAt(0, 0, 0, 1, 0, 0, 0, 0, 1);
sealevel = -.2;
makemountain();
}
void keyboard(unsigned char key, int x, int y)
{
switch (key) {
case '-':
sealevel -= 0.01;
break;
case '+':
case '=':
sealevel += 0.01;
break;
case 'f':
res = (res-1)*2 + 1;
makemountain();
break;
case 'c':
res = (res-1)/2 + 1;
makemountain();
break;
case 27:
exit(0);
break;
}
}
void makemountain(int l,int t,int r,int b) {
int cx=(l+r)/2;
int cy=(t+b)/2;
// int s=max(max(diff(cx,r),diff(cy,b)),max(diff(cx,l),diff(cy,t)));
int s=max(diff(cx,l),diff(cy,t));
float nw=alt.pos[l][t];
float ne=alt.pos[r][t];
float se=alt.pos[r][b];
float sw=alt.pos[l][b];
float c=(nw+ne+sw+se)/4.0;
alt.pos[cx][cy]=c;
geol(l,cy,nw,sw,s);
geol(r,cy,ne,se,s);
geol(cx,t,nw,ne,s);
geol(cx,b,sw,se,s);
// alt.display();
if (s>0) {
makemountain(l,t,cx,cy);
makemountain(cx,t,r,cy);
makemountain(l,cy,cx,b);
makemountain(cx,cy,r,b);
}
}
void init(void)
{
GLfloat amb[] = {0.2,0.2,0.2};
GLfloat diff[] = {1.0,1.0,1.0};
GLfloat spec[] = {1.0,1.0,1.0};
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT0, GL_AMBIENT, amb);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diff);
glLightfv(GL_LIGHT0, GL_SPECULAR, spec);
glClearColor (0.5, 0.5, 1.0, 0.0); // sky
glEnable(GL_DEPTH_TEST);
sealevel = 0.0;
makemountain();
}
void main(int argc,String *argv) {
ArgParser a=ArgParser(argc,argv);
size=a.intafter("-gs","grid size",20);
float rotspeed=a.floatafter("-rs","rotation speed",pi/80.0);
float elevang=a.floatafter("-ea","elevation angle",pi/7.0);
float waterlevel=a.floatafter("-wl","water level",-0.2);
bool funky=a.argexists("-f","funky");
bool groovy=a.argexists("-g","groovy");
a.done();
int scrwid=800;
int scrhei=600;
//printf("z\n");
allegrosetup(scrwid,scrhei);
//printf("a\n");
PPsetup(scrwid,scrhei,4.0,4.0);
//printf("b\n");
mypalette(0,myRGB(0,0,0));
mypalette(255,myRGB(0,255,0));
makepalette(&greypalette);
alt=Map2d<float>(size,size,0.0);
randomise();
drv=Map2d<float>(size,size,&myrnd);
vel=Map2d<float>(size,size,0.0);
vs=Map2d<V3d>(size,size);
int time=0;
dogeol(300);
while (!keypressed()) {
//printf("d\n");
time++;
// Generate new mountain
alt.pos[0][0]=drv.pos[0][0];
alt.pos[size-1][0]=drv.pos[size-1][0];
alt.pos[0][size-1]=drv.pos[0][size-1];
alt.pos[size-1][size-1]=drv.pos[size-1][size-1];
makemountain(0,0,size-1,size-1);
// Render mountain
PPclear();
Matrix ma=Matrix::rotation(V3d(0,1,0),rotspeed*(float)time);
Matrix mb=Matrix::rotation(V3d(1,0,0),elevang);
//printf("!");
Octree<Renderable*> o=Octree<Renderable*>(V3d::o,2.0,&getpos);
for (int i=0;i<size;i++)
for (int j=0;j<size;j++) {
//printf(">");
V3d x=V3d((float)i/(float)size*2.0-1.0,alt.pos[i][j],(float)j/(float)size*2.0-1.0);
// x.y=x.y*ramp((float)i/(float)size*2.0);
x=x*V3d(1,2,1)-V3d(0,1,0);
bool wat;
if (x.y<waterlevel) {
x.y=waterlevel;
wat=true;
} else
wat=false;
x=ma*x;
x=mb*x;
vs.pos[i][j]=x;
if (i>0 && j>0) {
o.add(new Triangle3d(x,vs.pos[i-1][j],vs.pos[i][j-1]));
o.add(new Triangle3d(vs.pos[i-1][j],vs.pos[i][j-1],vs.pos[i-1][j-1]));
}
}
Ori ori;
Viewpoint v=Viewpoint(V3d(0,0,-4),ori);
// Viewpoint v=Viewpoint(mb*(ma*V3d(0,0,-4)),mb*(ma*ori));
render(&o,&v);
o.freedom();
// PPshow();
// alt.display();
// Change drivers
dogeol(1);
}
}
void main(int argc,String *argv) {
ArgParser a=ArgParser(argc,argv);
size=a.intafter("-gs","grid size",20);
float rotspeed=a.floatafter("-rs","rotation speed",pi/80.0);
float elevang=a.floatafter("-ea","elevation angle",pi/7.0);
float waterlevel=a.floatafter("-wl","water level",-0.2);
a.done();
int scrwid=640;
int scrhei=480;
allegrosetup(scrwid,scrhei);
PPsetup(scrwid,scrhei,4.0,4.0);
mypalette(0,myRGB(0,0,0));
mypalette(255,myRGB(0,255,0));
alt=Map2d<float>(size,size,0.0);
randomise();
drv=Map2d<float>(size,size,&myrnd);
vel=Map2d<float>(size,size,0.0);
vs=Map2d<V3d>(size,size);
int time=0;
dogeol(1000);
while (!key[KEY_ESC]) {
time++;
// Generate new mountain
alt.pos[0][0]=drv.pos[0][0];
alt.pos[size-1][0]=drv.pos[size-1][0];
alt.pos[0][size-1]=drv.pos[0][size-1];
alt.pos[size-1][size-1]=drv.pos[size-1][size-1];
makemountain(0,0,size-1,size-1);
Matrix ma=Matrix::rotation(V3d(0,1,0),rotspeed*(float)time);
Matrix mb=Matrix::rotation(V3d(1,0,0),elevang);
// Render mountain
PPclear();
for (int i=0;i<size;i++)
for (int j=0;j<size;j++) {
V3d x=V3d((float)i/(float)size*2.0-1.0,alt.pos[i][j],(float)j/(float)size*2.0-1.0);
x.y=x.y*ramp((float)i/(float)size*2.0);
x=x*V3d(1,2,1)-V3d(0,1,0);
if (x.y<waterlevel)
x.y=waterlevel;
x=ma*x;
x=mb*x;
/* x=V3d::rotate(x,V3d(0,1,0),rotspeed*(float)time);
x=V3d::rotate(x,V3d(1,0,0),elevang);*/
vs.pos[i][j]=x;
if (i>0)
PPplotline(x,vs.pos[i-1][j]);
if (j>0)
PPplotline(x,vs.pos[i][j-1]);
}
PPshow();
// alt.display();
// Change drivers
dogeol(1);
}
}
// create() sets the elevations of the four grid corners to 0, generates
// internal elevations remembering the highest point, then generates display
// lists.
void Landscape::create(double rug) {
makemountain();
}
