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template<typename T>
class MatrixStack
{
public:
typedef T matrix_type;
private:
std::vector<matrix_type> stack;
public:
MatrixStack(void)
{
stack.push_back(matrix_type::identity());
}
void clear(void)
{
stack.clear();
stack.push_back(matrix_type::identity());
}
size_t size(void) const
{
return stack.size();
}
void push(void)
{
matrix_type tmp = stack.back(); //required in case the stack's storage gets reallocated
stack.push_back(tmp);
}
bool pop(void)
{
if (size() > 1)
{
stack.pop_back();
return true;
}
else
{
return false;
}
}
void load(const matrix_type& matrix)
{
stack.back() = matrix;
}
void loadIdentity(void)
{
load(matrix_type::identity());
}
void loadTransposed(const matrix_type& matrix)
{
load(transpose(matrix));
}
void mult(const matrix_type& matrix)
{
load(stack.back() * matrix);
}
void multTransposed(const matrix_type& matrix)
{
load(stack.back() * transpose(matrix));
}
const matrix_type& get(void) const
{
return stack.back();
}
};
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