Questions tagged [vector-graphics]
For questions about scalable 2D graphics based on vector operations, as opposed to raster graphics. For example, polygons, Bézier curves and ellipses.
16
questions with no upvoted or accepted answers
6
votes
0
answers
343
views
scan line conversion
I am going throug the topic scan line conversion where the scan line parallel to the x-axis is put through the intersection test with all the edges of the polygon.
Would there be any large ...
- 1,229
5
votes
1
answer
3k
views
How to draw an orthogonal graph from its edges and vertices data?
I am writing a software and I need to represent an graph in a orthogonal manner from topological data (vector of edges,vertices and their connectivity data)
Graphs consist of a set of vertices and a ...
- 283
2
votes
0
answers
36
views
How to add HemisphereLight to a simple threejs scene?
I'm trying to add light and see its changes in a simple scene in threejs but no matter the intensity or the color I set for the light, I see no change in a scene. Actually, if I don't include the ...
- 31
2
votes
0
answers
186
views
Plotting software used in old scientific papers
Does anyone know what software was used in many old scientific papers (please see attached example). I love the clean look of the graph and the typeface.
Thanks.
Graph example
- 21
2
votes
0
answers
75
views
Vectorizing half tone images
Vectorizing continuous tone images is often met with color palette reduction and visual artifacts. Half-tone images, on the hand, have constant patterns in their tones, which would intuitively lead to ...
- 21
1
vote
0
answers
51
views
How do freehand vector drawing tools typically decide where to place the control points?
I'm devising an algorithm to take a freehand curve and make a bezier spline from it. I can do this already just fine, but it's a naive implementation that creates about as many bezier curves as there ...
- 142
1
vote
0
answers
34
views
How to encode UTF inside an Encapsulated PostScript
Twenty years ago I made a descriptive illustration program whose output was the industrial standard Encapsulated PostScript, which is also compatible with the LaTeX system. In order to write accented ...
- 41
1
vote
0
answers
132
views
How to do a scanline fill with a self intersecting polygon?
I have a bezier curve and would like to draw it's stroke. To do that, I planned to approximate the stroke to a polygon and fill it with a scanline algorithm. While I feel confident about implementing ...
- 111
1
vote
0
answers
118
views
How to programmatically extract shape types like circle etc from SVG file path attributes
I have paths in SVG file with d attributes with values like
M 48.75521890547264 45.77014427860697 Q 48.756218905472636
45.77114427860697 50.24875621890547 45....
1
vote
0
answers
279
views
How can I convert a shape made out of pixels to vertices
I'm trying to implement the solution to get the minimum dissection into rectangles of a rectilinear polygon.
My shape is made out of pseudo-pixels (different width/height) but for the moment let's ...
- 173
0
votes
1
answer
133
views
Point a normal vector towards a point in 3D-Space
Given a normal vector in 3D-Space, how can I rotate the vector, such it points to a point in 3D-Space.
I tried couple of ways doing this, which ended up looking completely wrong.
0
votes
0
answers
77
views
How to programmatically extract all rectangle shapes from SVG file?
I have a SVG which contains rectangles with other shapes. How can I extract all rectangle details(co-ordinates, height and width)? Find below svg details where I kept only one rectangle for reference.
...
- 1
0
votes
0
answers
161
views
How to get world coordinates from a 4X4 camera matrix
I have Intel T265 camera which has a camera coordinates system like following diagram:
The camera system has two cameras and the center of the two cameras is the position of the camera system.
The ...
- 101
0
votes
0
answers
136
views
Changing Coordinate Frames with Affine Transformations
Stuck with this questions could I get some help.
where uA and vA are two orthonormal vectors indicating the two axes, and oA is the origin. Suppose that all three frames of reference shown in ...
- 1
0
votes
0
answers
60
views
Mathematics in Computer Graphics
Can you please recommend some topic for research work related to mathematics in CG?
(Maybe something like "Affine transformations in CG")
0
votes
0
answers
223
views
Non linear transformation of vector graphic
I want to do a non-linear transformation of a svg in python. My specific problem is to transform a rectangular svg image into a frustum like image, for which i have a mathematical equation of the form ...
