Drawing A Grid

General Discussion
1

I’m making a robot simulator to help the navigation team here at Tennessee Tech prepare for the IGVC competion. What I want to do is overlay a 1 unit by 1 unit grid on the map. If anything I would like to just be able to draw a grid period.

2

Just draw a grid into a texture, and apply the texture to the map. Or actually, you only need one grid cell in the texture (ie, a white texture with a black border). Then you can tile the texture.

3

No no, it needs to be exactly 1 unit in panda’s own head. So when I say move forward 1 unit, it moves forward a grid. Plus I much rather draw lines. Like when you have the axes in a 3d program.

4 
# dhochegger 2008


from pandac.PandaModules import * 
from direct.directtools.DirectGeometry import LineNodePath 
import direct.directbase.DirectStart 
from pandac.PandaModules import Point3,Vec3,Vec4

raws1unit = 20
rawsfithunit = 100
d = 0
X1 = 10
X2 = -10
Y1 = 10
Y2 = -10

linesX = LineNodePath(render,'quad',2,Vec4(.3,.3,.3,.3))
linesXX = LineNodePath(render,'quad',1,Vec4(.3,.3,.3,.3))
axis = LineNodePath(render,'axis',4,Vec4(.2,.2,.2,.2))
quad = LineNodePath(render,'quad',4,Vec4(.2,.2,.2,.2))


x1 = (0,Y2,0) 
x2 = (0,Y1,0) 

x3 = (X2,0,0)
x4 = (X1,0,0)


 
axis.drawLines([[x1,x2],[x3,x4]]) 
axis.create() 


q1 = (X1,Y1,0)
q2 = (X1,Y2,0)

q3 = (q2)
q4 = (X2,Y2,0)

q5 = (q4)
q6 = (X2,Y1,0)

q7= (q6)
q8 = (X1,Y1,0)

quad.drawLines([[q1,q2],[q3,q4],[q5,q6],[q7,q8]]) 
quad.create() 

for l in range (raws1unit-1):
    d+= 1
    l1 = (X2+d,Y1,0)
    l2 = (X2+d,Y2,0)
    
    l3 = (X2,Y1-d,0)
    l4 = (X1,Y1-d,0)  
    
    linesX.drawLines([[l1,l2],[l3,l4]]) 
linesX.create()

for l in range (rawsfithunit):
    d-=.2
    lx1 = (X2+1+d,Y1,0)
    lx2 = (X2+1+d,Y2,0)
    
    lx3 = (X2,Y1-1-d,0)
    lx4 = (X1,Y1-1-d,0)  
    
    linesXX.drawLines([[lx1,lx2],[lx3,lx4]]) 
linesXX.create()


run()