puts "=================================================================="
puts "0030979: vgrid -type gpu renders the rectangular grid via the shader"
puts "=================================================================="

pload MODELING VISUALIZATION

vclear
vinit View1
vaxo

box b 1 2 3
vdisplay b -dispMode 1
vfit
vzoom 0.2

# Shader-rendered rectangular grid (-type gpu opts into the GPU path):
#   XStep/YStep map to Scale/ScaleY, RotationAngle rotates in-plane basis.
vgrid -type gpu -step 0.5 0.5 -rotAngle 0
vdump $imagedir/${casename}_rect.png

# Non-isotropic step (different X and Y spacing)
vgrid -type gpu -step 0.5 1.0
vdump $imagedir/${casename}_rect_aniso.png

# In-plane rotation
vgrid -type gpu -step 0.5 0.5 -rotAngle 0.5
vdump $imagedir/${casename}_rect_rotated.png

vgrid off