Geometric Transforms. Changing coordinate systems. The plan. Describe coordinate systems and transforms Introduce homogeneous coordinates Introduce numerical integration for animation Later: camera transforms physics more on vectors and matrices. World Coordinates.
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Changing coordinate systems
Matrix.CreateScale( s );
Matrix.CreateScale( v );
Matrix.CreateTranslation( v );
Matrix.CreateTranslation( x, y, z);
Like transforms commute
applyWorld = myWorld * parentWorld;
object.position += object.velocity * gameTime.ElapsedGameTime.TotalSeconds;