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#include <World.h>
World::World(float width){
unsigned int i;
double f;
lineCount=width/HLINE+1;
if((line=(struct line_t *)calloc(lineCount,sizeof(struct line_t)))==NULL){
std::cout<<"Failed to allocate memory!"<<std::endl;
abort();
}
line[0].start=(rand()%100)/100.0f-0.8f; // lazy
if(line[0].start>-0.5f)line[0].start=-0.7f;
for(i=10;i<lineCount;i+=10){
line[i].start=((double)(rand()%40+200))/1000.0f-1;
}
for(i=0;i<lineCount;i++){
if(!(i%10)||!i){
f=line[i+10].start-line[i].start;
f/=10.0f;
}else{
line[i].start=line[i-1].start+f;
}
}
}
void World::draw(void){
unsigned int i;
glBegin(GL_QUADS);
for(i=0;i<lineCount;i++){
glColor3ub(0,255,0);
glVertex2f((HLINE*i)-1 ,line[i].start);
glVertex2f((HLINE*i)-1+HLINE,line[i].start);
glVertex2f((HLINE*i)-1+HLINE,line[i].start-HLINE*2);
glVertex2f((HLINE*i)-1 ,line[i].start-HLINE*2);
glColor3ub(150,100,50);
glVertex2f((HLINE*i)-1 ,line[i].start-HLINE*2);
glVertex2f((HLINE*i)-1+HLINE,line[i].start-HLINE*2);
glVertex2f((HLINE*i)-1+HLINE,-1);
glVertex2f((HLINE*i)-1 ,-1);
}
glEnd();
}
void World::detect(vec2 *v,const float width){
unsigned int i;
for(i=0;i<lineCount;i++){
if(v->y<line[i].start){
if(v->x>(HLINE*i)-1&&v->x<(HLINE*i)-1+HLINE){
v->x=(HLINE*i)-1+HLINE;
}else if(v->x+width>(HLINE*i)-1&&v->x+width<(HLINE*i)-1+HLINE){
v->x=(HLINE*i)-1-width;
}else{
v->y=line[i].start;
}
}else if(v->y>line[i].start+HLINE/2){
v->y-=HLINE/4;
}
}
}
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