Introduction
============

Scanline z-buffer algorithm in CPU, as a project of CG course

class CScanLine
{
public:
    CScanLine(int _w, int _h, QImage *_img);

    void setRenderTarget(int _w, int _h, QImage *_img);

    // start create target
    void begin(TargetType _type);
    void end();

    // input
    void vertex3d(double _x, double _y, double _z);
    void color3f(float _r, float _g, float _b); 

    // clear buffer
    void clear(int _target, const Color4u& _c = Color4u(0,0,0,255), double _depth = 1.0);

    // camera related operations, facade design model
    void lookAt(const Vec3d& eye, const Vec3d& at, const Vec3d& up);
    void perspective(double fovy, double aspect, double zNear, double zFar);
    void frustum(double left, double right, double bottom, double top, double near, double far);
    void ortho(double left, double right, double bottom, double top, double near, double far);

    void setRenderState(int _state, int _val);
};