/*
** brief : color with ambiance luminosity
** @light : our struct light
** @p : our vector P
** @cone : our cone
** @color : the color of the cone
*/
static void _normal_cone_amb(t_light *l, t_vector *p,
t_cone *cone, t_color **color)
{
double angle;
t_vector *vn;
t_color *tmp;
vn = create_vector(p->x, p->y, (-1.0) * cone->angle * p->z);
angle = calc_angle_amb(p, l->coord, vn, cone->pn);
free(vn);
if (!(angle < 0.00001))
{
tmp = _calc(angle, cone, l);
add_colors(color, tmp);
free(tmp);
}
}
double calc(string expr) {
stack<double> st;
stack<char> st_exprs;
set<char> expr_set = {'+', '-', '*',
'/'};
map<char, int> priories; priories['+'] = 1; priories['-'] = 1; priories['*'] = 2; priories['/'] = 2; string tmp; for (const char ch :expr) {
if (expr_set.find(ch) == expr_set.end()) { tmp += ch; } else {
st.push(atof(tmp.c_str())); tmp = ""; if (st_exprs.empty()) {
st_exprs.push(ch); continue;
} char old_expr = st_exprs.top(); if (priories[old_expr] > priories[ch]) {
double val1 = st.top(); st.pop(); double val2 = st.top(); st.pop(); double ret = _calc(
val1, val2, old_expr); st.push(ret); st_exprs.pop();
} st_exprs.push(ch);
}
} st.push(atof(tmp.c_str())); cout << "number stack size:" << st.size() <<
endl; while (!st_exprs.empty()) {
char expr = st_exprs.top(); double val1 = st.top(); st.pop(); double val2 = st.top(); st.pop(); double ret = _calc(
val2, val1, expr); st.push(ret); st_exprs.pop();
} return st.top();
}
