Man who stares at code. Gaming, Gamedev, Comics, Music and everything else. @komposter64@mastodon.social @komposter64@bsky.social
![Quick and Dirty GDScript code:
func clip_poly(verts:Array[Vector3]):
var verts_in:Array[Vector3] = verts # array with all verticies of polygon in world space
var verts_out:Array[Vector3] = [] # empty output array, will contain clipped vertices
var planes:Array[Plane] = self.get_frustum() # planes of frustum in world space: near, far, left, top, right, bottom
# ignores near and far
for n in range(2, planes.size()):
var side:Plane = planes[n]
# clear output array
verts_out.clear()
# test all vertices in input array
for i in range(0,verts_in.size()):
# a and b are two consecutive vertices, implying an edge
var a = verts_in[i]
var b = verts_in[(i+1) % verts_in.size()]
# check for intersection with plane between a and b
var p = side.intersects_segment(a, b)
# if a is in front of plane, add it to the output
if side.distance_to(a) <= 0:
verts_out.append(a)
# if intersection was found, also add it to the output
if p != null:
verts_out.append(p)
# use output as input for next round
verts_in = verts_out.duplicate()
# vert_out contains clipped vertices, can now be projected to screen
return verts_out](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:2wp7je5q2qprw5w3ce5h5jjn/bafkreibjx456egezhvlmy37zjol25yf4bcc5oa4ytjxybpveejch3plfvu)
Man who stares at code. Gaming, Gamedev, Comics, Music and everything else. @komposter64@mastodon.social @komposter64@bsky.social