computational-geometry

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CGAL: Find face/triangle a point belongs to?

After reading about it I\'ve come to this: #include <vector> #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>[详细]

2023-03-22 01:15 分类：问答
find orthonormal basis for a planar 3D ( possibly degenerate) polygon

Given a general planar 3D polygon, is there a general way to find the orthonormal basis for that planar polygon?[详细]

2023-03-21 17:06 分类：问答
GIS map overlay intersection operation on map layers

In map overlay, is intersection of map layers a commutative operation ie layer_开发者_如何转开发A intersection layer_B = layer_B intersection layer_A?It depends on if the layers are the same geometry[详细]

2023-03-20 13:25 分类：问答
Calculating normals in a triangle mesh

I have drawn a triangle mesh with 10000 vertices(100x100) and it will be a grass ground. I used gldrawelements() for it. I have looked all day and still can\'t understand how to calculate the normals[详细]

2023-03-19 06:53 分类：问答
Flood filling of 3-dimensional polygon

here is a problem for you ;) I have a 3-dimensional array filled with 1s and 0s. The 1s represent 3 dimensional complex polygons ( not simple polygons ). Only the boundaries of the polygons have the[详细]

2023-03-18 15:20 分类：问答
Sorting of vertices after intersection of 3d isosurface with plane

Here is another geometric problem: I have created an 3-dimensional triangulated iso-surface of a point cloud using the marching cubes algorithm. Then I intersect this iso-surface with a plane and get[详细]

2023-03-17 22:10 分类：问答
How to create a polygon in JTS when we have list of coordinate?

We can create a LineString using coordinates list like开发者_Go百科 this: Geometry g1 = new GeometryFactory().createLineString(coordinates);[详细]

2023-03-16 22:54 分类：问答
Left or Right Hand Side of a Polyline

Quite a tricky one this, as the title suggests I need to work our which side of a polyline a point is.[详细]

2023-03-15 21:39 分类：问答
rotate 3d body according to a normal in matlab

I have 3d body (triangle mesh) and a surfuce normal to one of the faces. I want to rotate the body such that the Z axis would be parallel to the normal. How 开发者_开发问答to find the rotation matrix?[详细]

2023-03-15 11:55 分类：问答
PHP Geolocation/Maths/GoogleMaps class?

I\'ve been working with Google Maps API v3 and created a map which allows me to plot multiple markers on a map and then join them together. I then have another collection of functions that allow me to[详细]

2023-03-15 09:35 分类：问答