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// Hapy library example
// Assembler for the RenderMan's RiBlobby primitive
// Based on Edmonds syntax (http://www.dctsystems.co.uk/RenderMan/edmonds.html)
// except that space is used instead of comma as separator
// run as : blobby_asm < file.bsm
/*
s1 = ellipsoid 1 0 0 0
s2 = ellipsoid 1 1 0 0
s3 = ellipsoid 1 2 0 0
pin = ellipsoid 3 0.3 0.3 1 0 0
beads = union s1 s2 s3
result = sub beads pin
*/
#include <Hapy/Parser.h>
#include <Hapy/Rules.h>
#include <Hapy/PreeFarm.h>
#include <Hapy/Assert.h>
#include <Hapy/IoStream.h>
#include <iostream>
#include <map>
#include <sstream>
using namespace Hapy;
Rule integer;
Rule value; // float
Rule name;
Rule variable;
Rule ellipsoid4;
Rule ellipsoid6;
Rule ellipsoid16;
Rule segment;
Rule plane;
Rule sub_operation;
Rule div_operation;
Rule sum_operation;
Rule mul_operation;
Rule max_operation;
Rule min_operation;
Rule r_value;
Rule definition;
Rule file;
void init_parser()
{
integer = !char_r('-') >> +digit_r;
value = integer >> !('.' >> *digit_r >> !('e' >> integer));
value.leaf(true);
value.verbatim(true);
name = quoted_r(anychar_r, '"');
variable = alpha_r >> *alnum_r;
variable.verbatim(true);
ellipsoid4 = "ellipsoid" >> value >> value >> value >> value;
ellipsoid6 = "ellipsoid" >> value >> value >> value >> value >> value >> value;
ellipsoid16 = "ellipsoid" >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value;
segment = "segment" >> (value >> value >> value >> value >> value >> value | value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value >> value);
plane = name >> value >> value >> value >> value;
sub_operation = "sub" >> variable >> variable;
div_operation = "div" >> variable >> variable;
sum_operation = "sum" >> +variable | "add" >> +variable;
mul_operation = "mul" >> +variable | "product" >> +variable;
max_operation = "max" >> +variable | "union" >> +variable;
min_operation = "min" >> +variable | "intersection" >> +variable;
r_value = value | ellipsoid4 | ellipsoid6 | ellipsoid16 | segment | plane | sub_operation | div_operation | sum_operation | mul_operation | max_operation | min_operation;
definition = variable >> '=' >> r_value;
file = *eol_r >> +(definition >> +eol_r);
}
std::string blobby_definition = "";
std::string blobby_data = "";
unsigned long blobby_data_index = 0;
unsigned long leaves = 0;
std::map<std::string, unsigned long> variables;
unsigned long variable_index = 0;
const std::string to_string(const unsigned long Value)
{
std::ostringstream stream;
stream << Value;
return std::string(stream.str());
}
const std::string get_variable_id(const std::string Value)
{
std::map<std::string, unsigned long>::iterator v = variables.find(Value);
if(v == variables.end())
{
std::cerr << "Undefined variable " << Value << std::endl;
return to_string(0);
}
return to_string(v->second);
}
const std::string get_n_parameters(Hapy::Pree::const_iterator Pree)
{
Hapy::Pree::const_iterator val = Pree->begin();
Hapy::Pree::const_iterator end = Pree->end();
unsigned long n = 0;
std::string vals = "";
while(val != end)
{
vals += ' ' + get_variable_id(val->image());
val++;
n++;
}
return to_string(n) + vals;
}
void parse_subpree(const Hapy::Pree& Node)
{
if(Node.begin() == Node.end())
return;
if(Node.rid() == definition.id())
{
Hapy::Pree::const_iterator def_node = Node.begin();
std::string variable = def_node->image();
def_node++; // =
def_node++; // rvalue
// Save variable index
if(variables.find(variable) == variables.end())
variables[variable] = variable_index++;
def_node = def_node->begin();
if(def_node[0].rid() == value.id())
{
blobby_definition += "1000 " + def_node[0].image() + "\n";
std::cerr << "constant is unimplemented" << std::endl;
}
else if(def_node[0].rid() == ellipsoid4.id())
{
leaves++;
blobby_definition += "1001 " + to_string(blobby_data_index) + "\n";
// ellipsoid
def_node = def_node->begin();
// parameters
def_node++;
std::string radius = def_node->image();
def_node++;
std::string px = def_node->image();
def_node++;
std::string py = def_node->image();
def_node++;
std::string pz = def_node->image();
blobby_data += ' ' + radius + " 0 0 0\n";
blobby_data += " 0 " + radius + " 0 0\n";
blobby_data += " 0 0 " + radius + " 0\n";
blobby_data += ' ' + px + ' ' + py + ' ' + pz + " 1\n";
blobby_data_index += 16;
}
else if(def_node[0].rid() == ellipsoid6.id())
{
leaves++;
blobby_definition += "1001 " + to_string(blobby_data_index) + "\n";
// ellipsoid
def_node = def_node->begin();
// parameters
def_node++;
std::string rx = def_node->image();
def_node++;
std::string ry = def_node->image();
def_node++;
std::string rz = def_node->image();
def_node++;
std::string px = def_node->image();
def_node++;
std::string py = def_node->image();
def_node++;
std::string pz = def_node->image();
blobby_data += ' ' + rx + " 0 0 0\n";
blobby_data += " 0 " + ry + " 0 0\n";
blobby_data += " 0 0 " + rz + " 0\n";
blobby_data += ' ' + px + ' ' + py + ' ' + pz + " 1\n";
blobby_data_index += 16;
}
else if(def_node[0].rid() == segment.id())
{
leaves++;
blobby_definition += "1002 ";
std::cerr << "segment is unimplemented" << std::endl;
}
else if(def_node[0].rid() == plane.id())
{
leaves++;
blobby_definition += "1003 ";
std::cerr << "plane is unimplemented" << std::endl;
}
else
if(def_node[0].rid() == sub_operation.id())
{
blobby_definition += "4 ";
// operation
def_node = def_node->begin();
// parameters
def_node++;
std::string subtrahend = def_node->image();
def_node++;
std::string minuend = def_node->image();
blobby_definition += get_variable_id(subtrahend);
blobby_definition += ' ';
blobby_definition += get_variable_id(minuend);
blobby_definition += "\n";
}
else if(def_node[0].rid() == div_operation.id())
{
blobby_definition += "5 ";
// operation
def_node = def_node->begin();
// parameters
def_node++;
std::string subtrahend = def_node->image();
def_node++;
std::string minuend = def_node->image();
blobby_definition += get_variable_id(subtrahend);
blobby_definition += ' ';
blobby_definition += get_variable_id(minuend);
blobby_definition += "\n";
}
else if(def_node[0].rid() == sum_operation.id())
{
blobby_definition += "0 ";
// alternative
def_node = def_node->begin();
// operation
def_node = def_node->begin();
// parameters
def_node++;
blobby_definition += get_n_parameters(def_node) + "\n";
}
else if(def_node[0].rid() == mul_operation.id())
{
blobby_definition += "1 ";
// alternative
def_node = def_node->begin();
// operation
def_node = def_node->begin();
// parameters
def_node++;
blobby_definition += get_n_parameters(def_node) + "\n";
}
else if(def_node[0].rid() == max_operation.id())
{
blobby_definition += "2 ";
// alternative
def_node = def_node->begin();
// operation
def_node = def_node->begin();
// parameters
def_node++;
blobby_definition += get_n_parameters(def_node) + "\n";
}
else if(def_node[0].rid() == min_operation.id())
{
blobby_definition += "3 ";
// alternative
def_node = def_node->begin();
// operation
def_node = def_node->begin();
// parameters
def_node++;
blobby_definition += get_n_parameters(def_node) + "\n";
}
}
else
{
Hapy::Pree::const_iterator pi = Node.begin();
for(; pi != Node.end(); pi++)
parse_subpree(*pi);
}
}
int main()
{
init_parser();
std::string buffer;
std::copy(std::istreambuf_iterator<char>(std::cin), std::istreambuf_iterator<char>(), std::back_inserter(buffer));
file.trim(*(space_r - eol_r));
Hapy::Parser parser;
parser.grammar(file);
if(!parser.parse(buffer))
{
std::cerr << parser.result().location() << " -> parsing failed" << std::endl;
exit(2);
}
Hapy::Debug(true);
// Process parse tree ...
const Hapy::Pree& main_node = parser.result().pree;
parse_subpree(main_node);
// Output ...
std::cout << "Blobby " << leaves << std::endl;
std::cout << "[" << std::endl;
std::cout << blobby_definition << std::endl;
std::cout << "]" << std::endl;
std::cout << "[" << std::endl;
std::cout << blobby_data << std::endl;
std::cout << "]" << std::endl;
std::cout << "[\"\"]" << std::endl;
return 0;
}
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