what you want to do is change the perspective, resp. view. have a look at the help patch for gemwindow. I am working on a better help patch, because it took me a long time to figure out, what means what...
marius.
Roman Haefeli wrote:
hello everyone
i am working on a gem-patch. i want to make the user feel like flying freely through the 3d-space (what an ugly old-schooled sentence, i know ;-). the problem i have is, that when i rotate the world, i would like the user to fly in the same direction, so that when moving the vanishing point stays in the middle of the gemwin to create the feeling of always looking forward. in other words, i need to 'translate' the rotation done with [rotateXYZ] by the three axes X, Y and Z to a vector {x,y,z}, so that the user flies in the same direction as he is looking to.
i was told that what i want to achieve is done with a matrix, but unfortunately my mathematical knowledge is far from being able to set it up myself.
examples: the user is looking to: vector to translate ('move'):
angle X = 0° Vx = 0 angle Y = 0° Vy = 0 angle Z = 0° Vz = 1
angle X = 0° Vx = -1 angle Y = 90° Vy = 0 angle Z = 0° Vz = 0
angle X = 90° Vx = 0 angle Y = 0° Vy = 1 angle Z = 0° Vz = 0
how can i compute the correct vector for any set of angles?
sorry for any inconvenience because of terms that might be used in the wrong way. i am not a mathematician and i hope, it is still clear, what i want to achieve.
many thanks in advance for any help.
roman
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