//
// zbuffer.h
//
// Handle depth buffer operations
//
// Copyright (c) J. Belson	1999.03.14
//


#ifndef _ZBUFFER_H_
#define _ZBUFFER_H_

/**
 * A depth buffer for hidden surface removal during rendering
 */
class zbuffer {

private:
	float *buffer;
	int width, height;

public:
	zbuffer(int width, int height);
	~zbuffer();

	// Initialise to large -ve value
	void clear_buffer(void);
	
	// Write a depth to a row of pixels
	void set_line(int line, int x1, int x2, float depth);

	// Returns pointer to buffer at specified position
	float *get_buffer(int line, int x);
};

#endif	// _ZBUFFER_H_