Files
igl/python/tutorial/708_Picking.py
T
2016-07-06 16:10:06 +02:00

53 lines
1.4 KiB
Python
Executable File

import sys, os
# Add the igl library to the modules search path
sys.path.insert(0, os.getcwd() + "/../")
import pyigl as igl
from shared import TUTORIAL_SHARED_PATH, check_dependencies, print_usage
dependencies = ["viewer"]
check_dependencies(dependencies)
def mouse_down(viewer, a, b):
bc = igl.eigen.MatrixXd()
# Cast a ray in the view direction starting from the mouse position
fid = igl.eigen.MatrixXi([-1])
coord = igl.eigen.MatrixXd([viewer.current_mouse_x, viewer.core.viewport[3] - viewer.current_mouse_y])
hit = igl.unproject_onto_mesh(coord, viewer.core.view * viewer.core.model,
viewer.core.proj, viewer.core.viewport, V, F, fid, bc)
if hit:
# paint hit red
C.setRow(fid[0, 0], igl.eigen.MatrixXd([[1, 0, 0]]))
viewer.data.set_colors(C)
return True
return False
if __name__ == "__main__":
keys = {"click": "Pick face on shape"}
print_usage(keys)
# Mesh with per-face color
V = igl.eigen.MatrixXd()
F = igl.eigen.MatrixXi()
C = igl.eigen.MatrixXd()
# Load a mesh in OFF format
igl.readOFF(TUTORIAL_SHARED_PATH + "fertility.off", V, F)
# Initialize white
C.setConstant(F.rows(), 3, 1.0)
# Show mesh
viewer = igl.viewer.Viewer()
viewer.data.set_mesh(V, F)
viewer.data.set_colors(C)
viewer.core.show_lines = False
viewer.callback_mouse_down = mouse_down
viewer.launch()