redBeard15
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Posted: January 28, 2010 02:43 by redBeard15
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I have a scene I'm creating with orthographic projection:gl.glOrtho(0.0f, 100.0f, 0.0f, 100.0f, -1.0f, 1.0f); I'm trying to rotate the scene 90 deg. counterclockwise using 'gluLookat()'. I can rotate the scene using 'glTranslate()' and 'glRotate()', but I'm thinking 'gluLookat()' would be better. Here's what I have working. gl.glTranslatef(100.0f, 0.0f, 0.0f); gl.glRotatef(90, 0, 0, 1); For the life of me I cannot get anything with 'gluLookat()' working. The basic (non-rotated) call to 'gluLookat()' is:
glu.gluLookAt(
0.0f, 0.0f, 0.0f, // eye X,Y,Z
0.0f, 0.0f, -1.0f, // center X,Y,Z
0.0f, 1.0f, 0.0f); // up X,Y,Z
I can get the scene rotated correctly by specifying '1.0f, 0.0f, 0.0f' as the last three parameters, but I can't get the scene translated to the right and image is clipped off..... Thanks! |
Rotate orthographic projection scene
2 posts
Replies: 1 - Last Post: January 28, 2010 15:35
by: redBeard15
by: redBeard15
showing 1 - 2 of 2
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redBeard15
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Posted: January 28, 2010 15:35 by redBeard15
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Well, I figured this out (with some help from others). After rotating (e., setting the last three parameters to '1.0, 0.0, 0.0', 'up' is now the X axis so I need to move the eye and camera in the Y axis 100 units. The final call to do a 90 deg. counterclockwise rotation is:
glu.gluLookAt(
0.0f, 100.0f, 0.0f, // eye X,Y,Z
0.0f, 100.0f, -1.0f, // center X,Y,Z
1.0f, 0.0f, 0.0f); // up X,Y,Z
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Replies: 1 - Last Post: January 28, 2010 15:35
by: redBeard15
by: redBeard15
