Stack Overflow
Stack Overflow

Questions tagged [geometry-surface]

The mathematical or computing concept of a 2-dimensional shape.

Surface is a place of a manifold of two-dimensional points (flat surface) or surface is a continuous boundary which divide a three-dimensional space into two sections (curved surface). In general, a hypersurface is a variety of (n-1)-dimension points in n-dimensional space.

249 questions
-1
votes
1 answer

MySQL Search for GeoLocation Overlaps?

I am struggling with a semi-efficient way to do the following. Ideally through MySQL. Each search that is performed for this system includes a geo coordinate and a range for that individual. (So essentially a radius and center point). I want to be…
RiddlerDev
  • 7,370
  • 5
  • 46
  • 62
-1
votes
2 answers

Intersection between two (perpendicular) lines

Let's assume I have a (infinite) line defined as y = z * x how can I find the closest point in this line to any given coordinate? Technically I seek the intersection between the initial line and its perpendicular passing on the given coordinate.
Nuthinking
  • 1,211
  • 2
  • 13
  • 32
-1
votes
1 answer

How to trace the surface area as well as smoothen a specific region in an image using MATLAB

I have an image with 6 colors each indicating a value. I had obtained an image as shown below. I need to smoothen the edges and then find out the area as well as the surface area of that region. The second image shows a black line drawn in the…
Abirami Anbalagan
  • 196
  • 4
  • 15
-1
votes
1 answer

perspective transformation in Python: from rectangular to trapezoid

I am looking for a python function or library that can convert coordinates of rectangle to trapezoid coordinates. So far I found the relevant problem here: https://math.stackexchange.com/questions/13404/mapping-irregular-quadrilateral-to-a-rectangle…
Ivan T
  • 1,046
  • 1
  • 10
  • 22
-1
votes
1 answer

Find third point with circumcenter and two points of a triangle

How to calculate the third point of the isosceles triangle using JAVA, given its two points and the circumcenter. There will be two solutions for this, and it is sufficient for me if I get the shortest one from the points A and B.
Anand
  • 693
  • 1
  • 8
  • 26
-1
votes
1 answer

How to connect 4 points on a plane so they do not fold on themselves(they always create a Quadrilateral)

I have created a small Raphael app to showcase my struggle. I created four handles which can be moved. A 'sheet' is covering the entire screen except for the square between the 4 handles. Whenever the handles are dragged the sheet is placed…
Michael Seltenreich
  • 3,013
  • 2
  • 29
  • 55
-2
votes
1 answer

How can I find the steepest point of curve or the arc of the curvature?

Given the curve I just have the (X,Y) coordinates of the curve, I want to find the steepest point of this curve or the arc length (starting and ending point of the arc)
Jeet Jivrajani
  • 3
  • 3
-2
votes
1 answer

Estimate torsion for a discrete curve using four points

The curvature of a discrete space curve can be calculated using 3 successive points can be calculated using the Menger curvature (see https://en.wikipedia.org/wiki/Menger_curvature and Calculate curvature for 3 Points (x,y)). My question is: is…
ap21
  • 2,372
  • 3
  • 16
  • 32
-3
votes
1 answer

Is there any C++ library (for Linux) for repairing the non-manifold meshes and converting it to manifold geometry?

I have the segmentation results from one algorithm, however, the generated triangle surface is not manifold geometry. I am asking this question here if there is any C++ library that can be used for converting the non-manifold geometry to manifold…
S.EB
  • 1,966
  • 4
  • 29
  • 54
1 2 3
…
16
17