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tchpowdog said:Now I have my parabolic equation. From this, I find the tangent line at point ##(x_1,y_1)## by taking the derivative of my equation, finding the slope, pluggin that back, etc. From here, I can calculate an angle ∅ of the initial trajectory.
What do you do in the "ect"? I'm trying to make a tennis game and i was trying to understand how dows this works but it is hard... If you could help me I would appreciate it very much!