All Questions
Tagged with vector-graphics c++
64
questions
5
votes
1
answer
117
views
How to find the greatest possible euclidean distance we can achieve by moving using given set of vectors
That's a problem from Polish Olympiad in Informatics, called Pionek (PIO).
Given a set of not unique vectors, find the greatest possible euclidean distance in reference to (0,0) point you can achieve ...
- 770
2
votes
1
answer
137
views
When to overload an operator in C++ as a member of a user-defined data structure and when not? I am completely lost
For any of you who can help explain to me when and when not to overload an operator as a member of a class or struct for example or not as a member, like global one.
The thing is that I am learning ...
- 23
2
votes
0
answers
59
views
Position vector into global world position vector using a camera
I am programming a 2d rendering engine with opengl, imgui and c++.
The problem is to turn my mouse position into global world position using a camera.
This is my current code inside my ...
- 21
0
votes
1
answer
205
views
OpenGL Drawing 2 vectors with a given angle between them
I'm trying to draw in OpenGL 2 vectors with a given angle (in radians) between them, something like this:
I managed to draw the vectors but I'm not sure how to place them at the specific angle:
...
- 27
-1
votes
1
answer
164
views
Convert arbitrary grid of subpixel points to raster image
I hope you are doing well. I am stuck at one part of a visual effect program in C++, and wanted to ask for help.
I have an array of colors at random positions on an image. There can be any number of ...
- 131
-1
votes
1
answer
461
views
How to rasterize a vector image in C++ Win32 API
recently I have been trying to experiment with vector graphics in C++. I want to make a Win32 app that reads an svg file and shows it on the screen. The program currently is simple. A window opens ...
-1
votes
1
answer
411
views
c++/openGL - VBO/VAO code in class/object not rendering at all [duplicate]
I'm making a small game engine for vector graphics in OpenGL, and it is already broken in the early stages. I had it working with all the data for one object in the main.cpp file, but once I moved all ...
0
votes
0
answers
85
views
What is the signifigance of the Dot Product in World to Local Transformations?
Looking for help understanding why this World to Local Space function works.
I'm working my way through Buckland's Programming Game AI By Example
The following function is used in the book to convert ...
- 25
2
votes
1
answer
670
views
Generate a "pieslice" in C without using the pieslice() of graphics.h
In the BGI library's "graphics.h" header there is a function pieslice in that header file,its syntax is:
#include <graphics.h>
void pieslice(int x, int y, int stangle, int endangle, int radius)...
user10626935
0
votes
1
answer
704
views
Vector on upper half of hemisphere
I have a normal vector N, which defines the upper half of an hemisphere and an function, which creates random points P on the hemisphere.
Now I want to know, if the randomly choosen point is on the ...
- 15.6k
0
votes
1
answer
573
views
distance estimation opencv base on vector
I'm trying to calculate distance using OpenCV and by simulating 2d vector field.
short story :
I have :
camera angle
camera position
2 object position
image : 2d field on x axis
I have camera ...
- 27
2
votes
1
answer
2k
views
What is the "reference vector" in glm's orientedAngle() function?
https://glm.g-truc.net/0.9.4/api/a00210.html
I'm trying to find the signed angle between two vectors in 3d space.
I can't seem to find what the "reference vector" is in this function, mathematically....
- 168
0
votes
0
answers
66
views
Drawing solid triange in a cube result in flicker
I'm trying to draw a cube using software rendering. So I have I'm drawing a cube out of triangles. So I render a solid triangle. The cube is rendered successfully, but there are flicker while rotating ...
- 53
-3
votes
1
answer
304
views
only one value inserted in vector in opengl code
unable to insert more than one element in vector; worked fine when I tested with an integer vector. tried the following:
push_back function
insert function
assign function
The issue is in the ...
1
vote
0
answers
136
views
Qt QPainter moire effect on small render targets
I am drawing using QPainter a very complex vector image (a PCB board, to be precise) using only one color - Qt::black. The problem is that the input file has tons of horizontal rectangles as ...
- 309