Computer Graphics-code_3

#include <iostream> #include <GL/glut.h> #include <cmath> #define PI 3.141592653#pragma Comment (lib, "  Opengl32.lib ") #pragma comment (lib," Glu32.lib ") #pragma comment (lib," Glut32.lib ") using namespace Std;int Wnd_w = 800 /2;int Wnd_h = 600/2;double aspect = wnd_w/wnd_h;double Ortho_left =-wnd_w/1.5;double Ortho_right = wnd_w/1.5;d ouble Ortho_bottom =-wnd_h/1.5;double Ortho_top = wnd_h/1.5;double near = -500.0;double far = 2000.0;double LookAt_ey ex = 125;double Lookat_eyey = 105;double Lookat_eyez = -175;double Lookat_centerx = 10;double LookAt_centery = 0;double Lo Okat_centerz = 0;double Lookat_upx = 0.25;double Lookat_upy = -0.5;double Lookat_upz = -2.5;class Point {//point structpub Lic:int X;int Y;int z; Point (): X (0), y (0), Z (0) {}point (int a, int b, int c): X (a), Y (b), Z (c) {}point (const point& SRC): x (src.x), Y (src . Y), Z (src.z) {}point& operator= (const point &src) {if (This! = &src) {this->x = Src.x;this->y = Src.y;t his-&Gt;z = src.z;} Return *this;}};/ /color tableglfloat black_color[] = {0.0, 0.0, 0.0, 1.0}; Glfloat red_color[] = {1.0,0.0,0.0,1.0}; Glfloat green_color[] = {0.0, 1.0, 0.0, 1.0}; Glfloat blue_color[] = {0.0, 0.0, 1.0, 1.0}; Glfloat white_color[] = {1.0, 1.0, 1.0, 1.0};  Glfloat grey_color[] = {0.5, 0.5, 0.5, 1.0};inline void gl_line (int x0, int y0, int z0, int x1, int y1, int z1, glfloat* color, int width = 1) {//As a straight line GLCOLOR4FV (color); gllinewidth (width); glbegin (gl_lines); glvertex3f (x0, y0, z0); glvertex3f ( x1, Y1, Z1); Glend ();} inline void Gl_line (Point P1, point P2, glfloat* color, int width = 1) {//As line GLCOLOR4FV (color); gllinewidth (width); Glbegin ( Gl_lines); Glvertex3d (p1.x, P1.y, p1.z); Glvertex3d (p2.x, P2.y, p2.z); Glend ();} void Draw_rect (Point P1, point P2, point P3, point P4, glfloat* color, int width = 1) {GLCOLOR4FV (color); Gllinewidth (width ); Glbegin (Gl_line_loop); Glvertex3d (p1.x, P1.y, p1.z); Glvertex3d (p2.x, P2.y, p2.z); Glvertex3d (p3.x, P3.y, p3.z); Glvertex3d (p4.x, P4.y, p4.z); Glend ();} void Draw_cube (glfloat* color, int width = 1) {point P1 (-100, 100, 100); Point P2 (100, 100, 100); Point P3 (100,-100, 100); Point P4 (-100,-100, 100); Point P5 (-100, 100,-100); Point P6 (100, 100,-100); Point P7 (100,-100,-100); Point P8 ( -100, -100, -100);d raw_rect (P1, p2, p3, p4, color, width);d raw_rect (P5, P6, p2, p1, color, width);d raw_rect (P8, p 7, P6, p5, color, width);d raw_rect (P4, P3, P7, P8, color, width);} inline double Transradian (int angle) {return angle*pi/180;//converts the angle to radians}//sphere void Draw_sphere (double R, int n, glfloat* colo r, int width = 1) {int longitude = 0;//latitude int latitude = 0;//Longitude int incremental = 360/N;GLCOLOR4FV (color); gllinewidth (width) ; for (longitude = 0; longitude <=; longitude + = incremental) {Glbegin (Gl_line_loop); for (latitude = -180; latitude <= 180; Latitude + = incremental) {glvertex3f (R*sin (Transradian)) Longitude (*cos (Transradian)), Latitude (R*sin ( Longitude) *sin (Transradian (latitude)), R*cos (Transradian (longitude)));} Glend ();} for (latitude=-180; Latitude <= 180; Latitude + = incremental) {Glbegin (Gl_line_loop); for (longitude = 0; longitude <=; longitude + = incremental) {Glvert ex3f (R*sin (Transradian (longitude)) *cos (Transradian (latitude)), R*sin (Transradian (longitude)) *sin (Transradian ( latitude)), R*cos (Transradian (longitude)));} Glend ();}} ellipsoid void Draw_oblong (double Rx, double Ry, double Rz, int n, glfloat* color, int width = 1) {int longitude = 0;//latitude int lat Itude = 0;//Longitude int incremental = 360/N;GLCOLOR4FV (color); gllinewidth (width); for (longitude = 0; longitude <=; long Itude + = incremental) {Glbegin (Gl_line_loop); for (latitude = -180; latitude <=; latitude + = incremental) {GLVERTEX3 F (Rx*sin (Transradian (longitude)) *cos (Transradian (latitude)), Ry*sin (Transradian (longitude)) *sin (Transradian ( latitude)), Rz*cos (Transradian (longitude)));} Glend ();} for (latitude = -180; latitude <=; latitude + = incremental) {Glbegin (Gl_line_loop); for (longitude = 0; Longitude &l t;= 180; Longitude + = incremental) {Glvertex3f (Rx*sin (Transradian (longitude)) *cos (Transradian (latitude)), Ry*sin (Transradian (longitude)) *sin (Transradian (latitude)), Rz*cos (Transradian (longitude)));} Glend ();}} ring void Draw_torus (double R, double R0, int nlong, int nlat, glfloat* color, int width = 1) {int longitude = 0;//latitude int lat  Itude = 0;//Longitude int incremental_long = 360/nlong;int Incremental_lat = 360/NLAT;GLCOLOR4FV (color); gllinewidth (width); for (longitude = -180; longitude <=; longitude + = Incremental_long) {Glbegin (Gl_line_loop); for (latitude = -180; latitude <=; latitude + = Incremental_lat) {glvertex3f (R0 + r*sin (Tran Sradian (longitude)) *cos (Transradian (latitude)), (R0 + r*sin (Transradian (longitude))) *sin (Transradian (latitude)), R*cos (Transradian (longitude)));} Glend ();} for (latitude = -180; latitude <=; latitude + = Incremental_lat) {glbegin (Gl_line_loop); for (longitude = -180; longi Tude <= 180; Longitude + = Incremental_long) {glvertex3f ((R0 + r*sin (Transradian (longitude))) *cos (Transradian (latitude)), (R0 + r*sin (Transradian (longitude))) *sin (Transradian (latitude)), R*cos (Transradian (longitude)));} Glend ();}}  void display () {glclear (gl_color_buffer_bit); Gl_line (0,-wnd_h, 0, 0, wnd_h, 0, Grey_color, 2);//Axis gl_line (-wnd_w, 0, 0, Wnd_w, 0, 0, Blue_color, 2); Gl_line (0, 0, -5000, 0, 0,, Green_color, 2);//Sphere Draw_sphere (, White_color);//Ellipsoid Dr Aw_oblong (White_color),//Ring Draw_torus (max, Max, Max, grey_color); Glflush (); void init (void) {Glclearcolor (0.0, 0.0, 0.0, 0.0); Glmatrixmode (gl_projection); glloadidentity (); Glortho (Ortho_left, Ortho_right, Ortho_bottom, Ortho_top, near, far); Glmatrixmode (Gl_modelview); glloadidentity (); Glulookat (LookAt_eyex , Lookat_eyey, Lookat_eyez, Lookat_centerx, Lookat_centery, Lookat_centerz, LOOKAT_UPX, Lookat_upy, LookAt_upz);} void Main (int argc, char** argv) {glutinit (&AMP;ARGC, argv); Glutinitdisplaymode (Glut_rgb | Glutinitwindowposition (Glut_single), Glutinitwindowsize (Wnd_w * 2, Wnd_h * 2), Glviewport (0, 0, Wnd_w, Wnd_H); GlutcReatewindow ("Demo"); init (); Glutdisplayfunc (&display); Glutmainloop ();} 

　　

Computer Graphics-code_3