Back to draw-VTK
Once you have opened a Maxima session, load package draw and then set global variable draw_renderer to vtk:
load("draw") $ draw_renderer: 'vtk $
Parallelograms: playing with colors and transparency:
draw3d( color = blue, parallelogram([0,0,0], [1,1/2,0], [0,1,0]), color = yellow, parallelogram([0,0,1], [1,1/2,1], [0,1,1]), opacity = 1/2, color = gray, parallelogram([0,1/2,-1/2], [0,1/2,%pi/2], [1,1/2,-1/2]) ) $
Geometric transformation of a parallelogram. The transformation affects only the three vertices, once their new position is calculated, a new parallelogram:
poly4: parallelogram([0,0,0], [1,0,0], [0,1,0]) $ draw3d( poly4, color = red, transform = [x,y,z+1,x,y,z], poly4 ) $
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