Polygon_set Parser::parsePolygonSetDefinition() {
while (!_tokens.isDone()) {
switch(_tokens.peek().type()) {
case Token::KEYWORD_POLYGON:
return Polygon_set(parsePolygonDefinition());
case Token::KEYWORD_MULTIPOLYGON:
return parseMultipolygonDefinition();
default:
std::cerr << "WARNING: Discarded invalid token: " << _tokens.peek().string() << std::endl;
_tokens.discard();
break;
}
}
return Polygon_set();
}
Polygon_set Parser::parseMultipolygonDefinition() {
_tokens.consume(Token::KEYWORD_MULTIPOLYGON);
if (_tokens.peek().type() == Token::KEYWORD_EMPTY) {
_tokens.consume(Token::KEYWORD_EMPTY);
return Polygon_set();
}
return parsePolygonSet();
}
/* Adds a unit cube, axis-aligned and centered on zero to the Module.
* If solid is zero, add only lines. If solid is non-zero, use
* polygons. Only lines need to be supported now.
*/
void Module_cube(Module *md, int solid, Texture *tex[6]) {
Point v[8];
Point tv[4];
Vector normal[4];
TextureCoord st[4];
printf("adding cube...\n");
// corners of a cube, centered at (0, 0, 0)
Point_set( &v[0], -0.5, -0.5, -0.5 );
Point_set( &v[1], 0.5, -0.5, -0.5 );
Point_set( &v[2], 0.5, 0.5, -0.5 );
Point_set( &v[3], -0.5, 0.5, -0.5 );
Point_set( &v[4], -0.5, -0.5, 0.5 );
Point_set( &v[5], 0.5, -0.5, 0.5 );
Point_set( &v[6], 0.5, 0.5, 0.5 );
Point_set( &v[7], -0.5, 0.5, 0.5 );
// add only line
if (solid == 0) {
Line temp;
Line_set(&temp,v[0],v[1]);
Module_line(md,&temp);
Line_set(&temp,v[0],v[3]);
Module_line(md,&temp);
Line_set(&temp,v[0],v[4]);
Module_line(md,&temp);
Line_set(&temp,v[1],v[2]);
Module_line(md,&temp);
Line_set(&temp,v[1],v[5]);
Module_line(md,&temp);
Line_set(&temp,v[2],v[3]);
Module_line(md,&temp);
Line_set(&temp,v[2],v[6]);
Module_line(md,&temp);
Line_set(&temp,v[3],v[7]);
Module_line(md,&temp);
Line_set(&temp,v[4],v[5]);
Module_line(md,&temp);
Line_set(&temp,v[4],v[7]);
Module_line(md,&temp);
Line_set(&temp,v[5],v[6]);
Module_line(md,&temp);
Line_set(&temp,v[6],v[7]);
Module_line(md,&temp);
}
// use polygons
else {
Polygon temp;
Polygon_setNULL(&temp);
// THIS IS HARD-CODED !!!!!
if (tex != NULL) {
st[0].s = 372; st[0].t = 0;
st[1].s = 0; st[1].t = 0;
st[2].s = 0; st[2].t = 372;
st[3].s = 372; st[3].t = 372;
}
// front side
Polygon_set( &temp, 4, &(v[0]) );
Vector front = {{0.0,0.0,-1.0}};
normal[0] = normal[1] = normal[2]
= normal[3] = front;
Polygon_setNormals( &temp, 4, normal);
if (tex != NULL)
Module_texture(md,tex[0]);
Polygon_setTexture(&temp, 4, st);
Module_polygon(md,&temp);
// back side
Polygon_set( &temp, 4, &(v[4]) );
Vector back = {{0.0,0.0,1.0}};
normal[0] = normal[1] = normal[2]
= normal[3] = back;
Polygon_setNormals( &temp, 4, normal);
if (tex != NULL)
Module_texture(md,tex[1]);
Polygon_setTexture(&temp, 4, st);
Module_polygon(md,&temp);
// top side
Point_copy( &tv[0], &v[2] );
Point_copy( &tv[1], &v[3] );
Point_copy( &tv[2], &v[7] );
Point_copy( &tv[3], &v[6] );
Polygon_set( &temp, 4, tv );
Vector top = {{0.0,1.0,0.0}};
normal[0] = normal[1] = normal[2]
= normal[3] = top;
Polygon_setNormals( &temp, 4, normal);
if (tex != NULL)
Module_texture(md,tex[2]);
Polygon_setTexture(&temp, 4, st);
Module_polygon(md,&temp);
// bottom side
Point_copy( &tv[0], &v[0] );
Point_copy( &tv[1], &v[1] );
Point_copy( &tv[2], &v[5] );
Point_copy( &tv[3], &v[4] );
Polygon_set( &temp, 4, tv );
Vector bottom = {{0.0,-1.0,0.0}};
normal[0] = normal[1] = normal[2]
= normal[3] = bottom;
Polygon_setNormals( &temp, 4, normal);
if (tex != NULL)
Module_texture(md,tex[3]);
Polygon_setTexture(&temp, 4, st);
Module_polygon(md,&temp);
// left side
Point_copy( &tv[0], &v[0] );
Point_copy( &tv[1], &v[3] );
Point_copy( &tv[2], &v[7] );
Point_copy( &tv[3], &v[4] );
Polygon_set( &temp, 4, tv );
Vector left = {{-1.0,0.0,0.0}};
normal[0] = normal[1] = normal[2]
= normal[3] = left;
Polygon_setNormals( &temp, 4, normal);
if (tex != NULL)
Module_texture(md,tex[4]);
Polygon_setTexture(&temp, 4, st);
Module_polygon(md,&temp);
// right side
Point_copy( &tv[0], &v[1] );
Point_copy( &tv[1], &v[2] );
Point_copy( &tv[2], &v[6] );
Point_copy( &tv[3], &v[5] );
Polygon_set( &temp, 4, tv );
Vector right = {{1.0,0.0,0.0}};
normal[0] = normal[1] = normal[2]
= normal[3] = right;
Polygon_setNormals( &temp, 4, normal);
if (tex != NULL)
Module_texture(md,tex[5]);
Polygon_setTexture(&temp, 4, st);
Module_polygon(md,&temp);
}
return;
}
