SolarSystem-openGL-/glskybox.h at master · CLiqing/SolarSystem-openGL- · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
#ifndef GLSKYBOX
#define GLSKYBOX
#include "base.h"
#include "gltexture.h"

void glDrawSkyBox(glTexture *tex,float x,float y,float z,float width,float height,float len)
{
  tex->MakeCurrent();

  //»ñÈ¡ÖÐÐÄµã
  x=x-width/2;
  y=y-height/2;
  z=z-len/2;

  //back face
  glBegin(GL_QUADS);
    glNormal3f(0.0,0.0,1.0);
		glTexCoord2f(1.0f, 0.0f);
		glVertex3f(x+width, y, z);

		glTexCoord2f(1.0f, 1.0f);
		glVertex3f(x+width, y+height, z);

		glTexCoord2f(0.0f, 1.0f);
		glVertex3f(x, y+height, z);

		glTexCoord2f(0.0f, 0.0f);
		glVertex3f(x, y, z);
  glEnd();
  //front face
  glBegin(GL_QUADS);
    glNormal3f(0.0,0.0,-1.0);
		glTexCoord2f(1.0f, 0.0f);
		glVertex3f(x, y, z+len);

		glTexCoord2f(1.0f, 1.0f);
		glVertex3f(x, y+height, z+len);

		glTexCoord2f(0.0f, 1.0f);
		glVertex3f(x+width, y+height, z+len);

		glTexCoord2f(0.0f, 0.0f);
		glVertex3f(x+width, y, z+len);
  glEnd();
  //bottom face
  glBegin(GL_QUADS);
    glNormal3f(0.0,1.0,0.0);
		glTexCoord2f(1.0f, 0.0f);
		glVertex3f(x, y, z);

		glTexCoord2f(1.0f, 1.0f);
		glVertex3f(x, y, z+len);

		glTexCoord2f(0.0f, 1.0f);
		glVertex3f(x+width, y, z+len);

		glTexCoord2f(0.0f, 0.0f);
		glVertex3f(x+width, y, z);
  glEnd();
  //top face
  glBegin(GL_QUADS);
    glNormal3f(0.0,-1.0,0.0);
		glTexCoord2f(1.0f, 0.0f);
		glVertex3f(x+width, y+height, z);


		glTexCoord2f(1.0f, 1.0f);
		glVertex3f(x+width, y+height, z+len);


		glTexCoord2f(0.0f, 1.0f);
		glVertex3f(x, y+height, z+len);


		glTexCoord2f(0.0f, 0.0f);
		glVertex3f(x, y+height, z);
  glEnd();
  //left face
  glBegin(GL_QUADS);
    glNormal3f(1.0,0.0,0.0);
		glTexCoord2f(1.0f, 0.0f);
		glVertex3f(x, y+height, z);

		glTexCoord2f(1.0f, 1.0f);
		glVertex3f(x, y+height, z+len);

		glTexCoord2f(0.0f, 1.0f);
		glVertex3f(x, y, z+len);

		glTexCoord2f(0.0f, 0.0f);
		glVertex3f(x, y, z);
  glEnd();

  //right face
  glBegin(GL_QUADS);
    glNormal3f(0.0,0.0,-1.0);
		glTexCoord2f(1.0f, 0.0f);
		glVertex3f(x+width, y, z);

		glTexCoord2f(1.0f, 1.0f);
		glVertex3f(x+width, y, z+len);

		glTexCoord2f(0.0f, 1.0f);
		glVertex3f(x+width, y+height, z+len);

		glTexCoord2f(0.0f, 0.0f);
		glVertex3f(x+width, y+height, z);
  glEnd();
}
#endif