Creating a Terrain Mesh Editor

Blitz3D Forums/Blitz3D Programming/Creating a Terrain Mesh Editor

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In My Game, My Terrain is a Specific Level.. So I need an Editor to modify the Mesh Terrain as I see fit. I have some basics going along, I can create a mesh, Selete a vertice to move up or down. What I'd like to do is select a Vertice and depending on my settings select a range of Vertices so I can make mountain tops and such. I Guess checking the distance from my currently selected Vertice might work... but then the problem of how do I make a smooth transition from the center vertice, ourward, like hills and valleys.