question about rotation

Graphics and GPU Programming Programming

Started by grassgrass March 18, 2004 09:20 AM

2 comments, last by grassgrass 20 years, 1 month ago

103

Author

March 18, 2004 09:20 AM

dear all, using following function for rotate On The Y-Axis By angle glrotatef(angle, 0, 1, 0) but if i want to roate 23 degree from Y-axis, just like the situation of earth self rotation, how can i do? thanks

OrthoDiablo

140

March 18, 2004 09:32 AM

You might want to rotate your y-axis around the z-axis first.

In your case this might work:

glRotatef(angle23, 0.0, 0.0, -1.0);

Give a man a fish and you feed him for a day; teach him to use the Net and he won't bother you for weeks.

grassgrass

103

Author

March 18, 2004 09:38 AM

thx
but what mean of "angle23"

OrthoDiablo

140

March 18, 2004 09:49 AM

angle23 is your 23 degree angle

Give a man a fish and you feed him for a day; teach him to use the Net and he won't bother you for weeks.

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question about rotation

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