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Name	normal()
Examples	size(100, 100, P3D); noStroke(); background(0); pointLight(150, 250, 150, 10, 30, 50); beginShape(); normal(0, 0, 1); vertex(20, 20, -10); vertex(80, 20, 10); vertex(80, 80, -10); vertex(20, 80, 10); endShape(CLOSE);
Description	Sets the current normal vector. Used for drawing three dimensional shapes and surfaces, normal() specifies a vector perpendicular to a shape's surface which, in turn, determines how lighting affects it. Processing attempts to automatically assign normals to shapes, but since that's imperfect, this is a better option when you want more control. This function is identical to glNormal3f() in OpenGL.
Syntax	normal(nx, ny, nz)
Parameters	nx float: x direction ny float: y direction nz float: z direction
Returns	void
Related	beginShape() endShape() lights()