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Rev | Author | Line No. | Line |
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5098 | clevermous | 1 | /* spin.c */ |
2 | |||
3 | |||
4 | /* |
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5 | * Spinning box. This program is in the public domain. |
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6 | * |
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7 | * Brian Paul |
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8 | */ |
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9 | |||
10 | |||
11 | #include |
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12 | #include |
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13 | |||
14 | #include |
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15 | #include |
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16 | #include "ui.h" |
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17 | |||
18 | |||
19 | |||
20 | |||
21 | static GLfloat Xrot, Xstep; |
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22 | static GLfloat Yrot, Ystep; |
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23 | static GLfloat Zrot, Zstep; |
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24 | static GLfloat Step = 5.0; |
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25 | static GLfloat Scale = 1.0; |
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26 | static GLuint Object; |
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27 | |||
28 | |||
29 | |||
30 | |||
31 | static GLuint make_object( void ) |
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32 | { |
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33 | GLuint list; |
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34 | |||
35 | list = glGenLists( 1 ); |
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36 | |||
37 | glNewList( list, GL_COMPILE ); |
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38 | |||
39 | glBegin( GL_LINE_LOOP ); |
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40 | glColor3f( 1.0, 1.0, 1.0 ); |
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41 | glVertex3f( 1.0, 0.5, -0.4 ); |
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42 | glColor3f( 1.0, 0.0, 0.0 ); |
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43 | glVertex3f( 1.0, -0.5, -0.4 ); |
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44 | glColor3f( 0.0, 1.0, 0.0 ); |
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45 | glVertex3f( -1.0, -0.5, -0.4 ); |
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46 | glColor3f( 0.0, 0.0, 1.0 ); |
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47 | glVertex3f( -1.0, 0.5, -0.4 ); |
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48 | glEnd(); |
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49 | |||
50 | glColor3f( 1.0, 1.0, 1.0 ); |
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51 | |||
52 | glBegin( GL_LINE_LOOP ); |
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53 | glVertex3f( 1.0, 0.5, 0.4 ); |
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54 | glVertex3f( 1.0, -0.5, 0.4 ); |
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55 | glVertex3f( -1.0, -0.5, 0.4 ); |
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56 | glVertex3f( -1.0, 0.5, 0.4 ); |
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57 | glEnd(); |
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58 | |||
59 | glBegin( GL_LINES ); |
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60 | glVertex3f( 1.0, 0.5, -0.4 ); glVertex3f( 1.0, 0.5, 0.4 ); |
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61 | glVertex3f( 1.0, -0.5, -0.4 ); glVertex3f( 1.0, -0.5, 0.4 ); |
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62 | glVertex3f( -1.0, -0.5, -0.4 ); glVertex3f( -1.0, -0.5, 0.4 ); |
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63 | glVertex3f( -1.0, 0.5, -0.4 ); glVertex3f( -1.0, 0.5, 0.4 ); |
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64 | glEnd(); |
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65 | |||
66 | |||
67 | glEndList(); |
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68 | |||
69 | return list; |
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70 | } |
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71 | |||
72 | |||
73 | |||
74 | void reshape( int width, int height ) |
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75 | { |
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76 | glViewport(0, 0, (GLint)width, (GLint)height); |
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77 | glMatrixMode(GL_PROJECTION); |
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78 | glLoadIdentity(); |
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79 | glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 ); |
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80 | glMatrixMode(GL_MODELVIEW); |
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81 | } |
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82 | |||
83 | |||
84 | GLenum key(int k, GLenum mask) |
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85 | { |
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86 | switch (k) { |
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87 | case KEY_ESCAPE: |
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88 | exit(0); |
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89 | } |
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90 | return GL_FALSE; |
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91 | } |
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92 | |||
93 | |||
94 | void draw( void ) |
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95 | { |
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96 | glClear( GL_COLOR_BUFFER_BIT ); |
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97 | |||
98 | glPushMatrix(); |
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99 | |||
100 | glTranslatef( 0.0, 0.0, -10.0 ); |
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101 | glScalef( Scale, Scale, Scale ); |
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102 | if (Xstep) { |
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103 | glRotatef( Xrot, 1.0, 0.0, 0.0 ); |
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104 | } |
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105 | else if (Ystep) { |
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106 | glRotatef( Yrot, 0.0, 1.0, 0.0 ); |
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107 | } |
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108 | else { |
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109 | glRotatef( Zrot, 0.0, 0.0, 1.0 ); |
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110 | } |
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111 | |||
112 | glCallList( Object ); |
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113 | |||
114 | glPopMatrix(); |
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115 | |||
116 | glFlush(); |
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117 | tkSwapBuffers(); |
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118 | } |
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119 | |||
120 | |||
121 | void idle( void ) |
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122 | { |
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123 | Xrot += Xstep; |
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124 | Yrot += Ystep; |
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125 | Zrot += Zstep; |
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126 | |||
127 | if (Xrot>=360.0) { |
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128 | Xrot = Xstep = 0.0; |
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129 | Ystep = Step; |
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130 | } |
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131 | else if (Yrot>=360.0) { |
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132 | Yrot = Ystep = 0.0; |
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133 | Zstep = Step; |
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134 | } |
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135 | else if (Zrot>=360.0) { |
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136 | Zrot = Zstep = 0.0; |
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137 | Xstep = Step; |
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138 | } |
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139 | draw(); |
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140 | } |
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141 | |||
142 | void init(void) |
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143 | { |
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144 | Object = make_object(); |
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145 | glCullFace( GL_BACK ); |
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146 | /* glEnable( GL_CULL_FACE );*/ |
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147 | glDisable( GL_DITHER ); |
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148 | glShadeModel( GL_FLAT ); |
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149 | /* glEnable( GL_DEPTH_TEST ); */ |
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150 | |||
151 | Xrot = Yrot = Zrot = 0.0; |
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152 | Xstep = Step; |
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153 | Ystep = Zstep = 0.0; |
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154 | } |
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155 | |||
156 | |||
157 | int main( int argc, char *argv[] ) |
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158 | { |
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159 | return ui_loop(argc, argv, "spin"); |
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160 | } |