Hi all: In the example of osgdrawinstances, all the coordinates are compute by the instance id. In fact, we need all the coordinates then change the instance to its position. I googled and find can got this by set all the coordinates in a Texture2D. I do this by the following steps:
1. Change the coordinates to [0,1]. 2. Set the coordinates to the texture image buffer. In the shader I use texture2D function get the coordinate by the gl_InstanceID, then change it covert to 1 step above. The question is: I find the coordinates are not very right, am I wrong? Cheers, xianfa
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