camera.h

file code.zip are used to implement ray tracing technology.

#ifndef _CAMERA_H_
#define _CAMERA_H_

#include "scene.h"

#if defined(WIN32) | defined(i386) | defined(LITTLE_ENDIAN)
	#define BMP_BIG_ENDIAN 0
#else
    #define BMP_BIG_ENDIAN 1
#endif

/* May need to change the following line under Linux */
#ifdef _WIN32
#pragma pack(push, 2)
#else
#pragma pack(2)
#endif

#ifndef M_PI
#define M_PI 3.1415926
#endif

#define uint16 unsigned short
#define uint32 unsigned int

#define BI_RGB 0

#define BMP_FALSE 0
#define BMP_TRUE 1
#ifdef _WIN32
#pragma pack(pop)
#else
#pragma pack(0)
#endif

class Camera{ 
  private: 
	Point3 eye; 
	Vector3 u,v,n; 
	double viewAngle, aspect, nearDist, farDist; // view volume shape 
	int nRows, nCols;
	void setModelViewMatrix(); // tell OpenGL where the camera is 
	float H, W;
  public: 
	Camera() {} // default constructor 
	void set(Point3 eye, Point3 look, Vector3 up, bool tellOpenGL = false); // like gluLookAt() 
	void roll(float angle); // roll it 
	void pitch(float angle); // increase pitch 
	void yaw(float angle); // yaw it 
	void slide(float du, float dv, float dn); // slide it 
	void setShape(float vAng, float asp, float nearD, float farD, bool tellOpenGL = false);
	void setResolution(int r, int c) { nRows = r; nCols = c; }
	void rotAxes(Vector3& a, Vector3& b, float angle);
	void setProjectionMatrix();
	void status(ostream &myOut, long currentRay, int percent, Scene scn);
	void setDisplay(int numRows, int numCols);
	void drawOpenGL(Scene& scn); //draw whole scene using OpenGL tools
	void set(float ex, float ey, float ez, float lx, float ly, float lz, float upx, float upy, float upz);
	unsigned char* raytrace(Scene& scn, int blockSize, bool useOpenGL); 
};
#endif