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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 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 | } |