Disclaimer: I've been working on this for days and neither Google nor trial and error is adequate, apparently.
I'm trying to render an overhead, 2D scene with the "camera" at the center of the screen and the world objects rotated around it. Here are my variables: Camera.WorldX As Single ' World coordinates of camera. Camera.WorldYAs Single ' World coordinates of camera. Camera.Orientation As Single ' Angle of camera (2D overhead view, rotates screen like Contra III for SNES). Camera.Zoom As Single ' Scale of matrix for zooming in and out. sWidth As Short ' Width in pixels of screen. sHeight As Short ' Height in pixels of screen. I need to rotate the matrix so that rendered objects will appear in the correct positions with regard to the camera's orientation. I need to translate the matrix so that the camera coordinates are always at the center of the rendering window. I need to scale the matrix so that the camera can zoom in and out (always centered at the middle of the rendering window). I suspect that to center the camera on the rendering window after rotating the matrix, I need to "unrotate" the x and y offsets required to center it, which I can do if necessary using some functions I created to rotate an arbitrary point about an arbitrary origin. I think I can successfully rotate the matrix around the camera with code like this: Gl.Translatef(Camera.WorldX, Camera.WorldY, 0) Gl.Rotatef(- Camera.Orientation, 0, 0, 1) Gl.Translatef(- Camera.WorldX, - Camera.WorldY, 0) But then I need to translate the scene so that the camera is in the center of the rendering window. I also can't figure out how to arbitrarily scale the matrix to zoom in and out on the camera in this sequence. I have this: Gl.Scalef(128 * Zoom.Current, 128 * Zoom.Current, 1) but its effects vary depending on where I place it. The reason it multiplies by 128 is because each "tile" is 128 pixels, and each world coordinate is one tile. I couldn't be more confused if I'd just been shot in the head, so any help is greatly appreciated. -- Kevin Fishburne Eight Virtues www: http://sales.eightvirtues.com e-mail: sa...@eightvirtues.com phone: (770) 853-6271 ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
