I still couldn't solve the problem. Could some guru here please help?
Thanks a lot.

Thanks, I was already doing paraline projection in the camera constructor.

I was only using quads as an example. In the plugin I'm writing, it could be as many as 1024x1024 tiles (each 256x256 pixels), over the single file size/memory limit.

Could someone please let me know what I did wrong in the code, or point me to a right direction?

Much appreciated.

Hi all,

I'd like to output my model into 4 quad images(each a 256x256 png) , and then combine them into a big one (512x512). I wrote a plugin that sort of worked, but the 4 quads don't EXACTLY align (please see the attachment, esp. the bottom 2 pngs). Could someone please help?

• jay

Here are my steps:

1. I resize the SU window so make sure the view's client area is 512x512 pixels (used Spy++ to verify it).
2. In SU, I set the camera to be paraline.
3. In my plug in, I have a fucntion restore_camera, used to reset the camera each time before I output the quad image:

def restore_camera(vx,vy,vz,tx,ty,tz,ux,uy,uz)
new_eye = [vx,vy,vz]
new_target = [tx,ty,tz]
new_up = [ux,uy,uz]
new_camera = Sketchup::Camera.new(new_eye,new_target,new_up,false)

model = Sketchup.active_model
view = model.active_view
view.camera = new_camera

view.zoom_extents
view.zoom 1.0525
view.refresh
end

4. For each quad, the outputting image part looks like the following. I'm adding each quad with 4 lines, selecting them, and zoom to selection. These quads are visible in the attached png.

x, y below is the column/row index of the 4 quads, the 4 quads will be (0,0),(1,0),(0,1),(1,1) respectively

z = 1
tileWH = 256
ip0 = view.inputpoint (xtileWH, ytileWH)
ip1 = view.inputpoint ((x+1)tileWH, ytileWH)
ip2 = view.inputpoint ((x+1)*tileWH, (y+1)tileWH)
ip3 = view.inputpoint (xtileWH, (y+1)*tileWH)
pt3d_0 = ip0.position
pt3d_1 = ip1.position
pt3d_2 = ip2.position
pt3d_3 = ip3.position

theEdges= []
theEdges[0] = Sketchup.active_model.entities.add_line pt3d_0, pt3d_1
theEdges[1] = Sketchup.active_model.entities.add_line pt3d_1, pt3d_2
theEdges[2] = Sketchup.active_model.entities.add_line pt3d_2, pt3d_3
theEdges[3] = Sketchup.active_model.entities.add_line pt3d_3, pt3d_0

Sketchup.active_model.selection.add theEdges
view.zoom theEdges
view.zoom 1.0525
view.refresh

write_current_view("c:/temp/su_output/" + z.to_s() + "" + x.to_s() + "" + y.to_s() + ".png")