v4games
/
assimp
3
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[pyassimp] Fixed transformations in bounding box computation

pull/10/head
Séverin Lemaignan 2012-11-07 14:36:23 +01:00 committed by Séverin Lemaignan
parent 6d3cedc0b1
commit bfbcdfbae1
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
port/PyAssimp/pyassimp/helper.py
View File

@ -9,6 +9,7 @@ import ctypes
from ctypes import POINTER
import operator
import numpy
from numpy import linalg
import logging;logger = logging.getLogger("pyassimp")
@ -47,12 +48,14 @@ def transform(vector3, matrix4x4):
def get_bounding_box(scene):
bb_min = [1e10, 1e10, 1e10] # x,y,z
bb_max = [-1e10, -1e10, -1e10] # x,y,z
return get_bounding_box_for_node(scene.rootnode, bb_min, bb_max)
return get_bounding_box_for_node(scene.rootnode, bb_min, bb_max, linalg.inv(scene.rootnode.transformation))
def get_bounding_box_for_node(node, bb_min, bb_max):
def get_bounding_box_for_node(node, bb_min, bb_max, transformation):
transformation = numpy.dot(transformation, node.transformation)
for mesh in node.meshes:
for v in mesh.vertices:
v = transform(v, node.transformation)
v = transform(v, transformation)
bb_min[0] = min(bb_min[0], v[0])
bb_min[1] = min(bb_min[1], v[1])
bb_min[2] = min(bb_min[2], v[2])
@ -62,7 +65,7 @@ def get_bounding_box_for_node(node, bb_min, bb_max):
for child in node.children:
bb_min, bb_max = get_bounding_box_for_node(child, bb_min, bb_max)
bb_min, bb_max = get_bounding_box_for_node(child, bb_min, bb_max, transformation)
return bb_min, bb_max