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Draw Vector in viewpoint lookat direction
Hi,
I want to draw a line from one object in a special direction for a given amount. The amount (or the length) is from a slider and that works fine! But the direction of the line should be the viewpoint lookat direction. So for example my viewpoint is behind of a ball and now I want to draw a line to see how the ball will roll. I use: Code:
current = balls[0].get(viz.POSITION) vector = balls[0].get(viz.LOOK) future = vizmat.MoveAlongVector(current, vector, slider.get()*2) hit = viz.intersect(current, future) viz.startlayer(viz.LINE_LOOP) viz.vertexcolor(viz.RED) viz.linewidth(3) viz.vertex(current) viz.vertex(future) rod = viz.endlayer() Can anybody help me? And additionally it would be very great if the vector will be changed depending on a change of the viewpoint. If I turn the viewpoint left or right, the vector will be drawn in the corresponding direction. |
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