// - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
private static IExpression ParseMultExpression()
{
if (Check(FirstExpExp))
{
IExpression exp = ParseExpExpression();
while (Check(new TokenSet(TokenType.Multiply | TokenType.Divide)))
{
TokenType opType = CurrentToken.type;
Eat(opType);
if (!Check(FirstExpExp))
{
throw new InvalidSyntaxException("Expected an expression after * or / operator");
}
IExpression right = ParseExpExpression();
switch (opType)
{
case TokenType.Multiply:
exp = new MultExpression(exp, right);
break;
case TokenType.Divide:
exp = new DivExpression(exp, right);
break;
default:
throw new UnexpectedBehaviorException("Expected mult or divide, got: " + opType);
}
}
return(exp);
}
else
{
throw new InvalidSyntaxException("Invalid expression");
}
}
public Cone(double radius, double height)
{
IExpression fx = new MultExpression(
new MultExpression(
new SubExpression(
new ConstantExpression(height),
new VariableExpression("v")),
new ConstantExpression(radius / height)),
new CosineExpression(
new VariableExpression("u")));
IExpression fy = new VariableExpression("v");
IExpression fz = new MultExpression(
new MultExpression(
new SubExpression(
new ConstantExpression(height),
new VariableExpression("v")),
new ConstantExpression(radius / height)),
new SineExpression(
new NegateExpression(
new VariableExpression("u"))));
Init(fx, fy, fz, -Math.PI, Math.PI, 0.0, height);
}
public Cone( double radius, double height )
{
IExpression fx = new MultExpression(
new MultExpression(
new SubExpression(
new ConstantExpression( height ),
new VariableExpression( "v" ) ),
new ConstantExpression( radius/height ) ),
new CosineExpression(
new VariableExpression( "u" ) ) );
IExpression fy = new VariableExpression( "v" );
IExpression fz = new MultExpression(
new MultExpression(
new SubExpression(
new ConstantExpression( height ),
new VariableExpression( "v" ) ),
new ConstantExpression( radius/height ) ),
new SineExpression(
new NegateExpression(
new VariableExpression( "u" ) ) ) );
Init( fx, fy, fz, -Math.PI, Math.PI, 0.0, height );
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
private static IExpression ParseMultExpression()
{
if ( Check( FirstExpExp ) )
{
IExpression exp = ParseExpExpression();
while ( Check( new TokenSet( TokenType.Multiply | TokenType.Divide ) ) )
{
TokenType opType = CurrentToken.type;
Eat( opType );
if ( !Check( FirstExpExp ) )
{
throw new InvalidSyntaxException( "Expected an expression after * or / operator" );
}
IExpression right = ParseExpExpression();
switch ( opType )
{
case TokenType.Multiply:
exp = new MultExpression( exp, right );
break;
case TokenType.Divide:
exp = new DivExpression( exp, right );
break;
default:
throw new UnexpectedBehaviorException( "Expected mult or divide, got: " + opType );
}
}
return exp;
}
else
{
throw new InvalidSyntaxException( "Invalid expression" );
}
}
