accel | GPGPU Framework for Rust | GPU library
kandi X-RAY | accel Summary
kandi X-RAY | accel Summary
|crate |crates.io |docs.rs |GitLab Pages | | |:-----------|:---------------------------------------------------------------------------|:----------------------------------------------------------------------|:-----------------------------------------------------------------------------|:------------------------------------------| |accel |[Crate] |[docs.rs] |[cargo-doc] |CUDA-based GPGPU framework | |accel-core |[Crate] |[docs.rs] |[cargo-doc] |Helper for writing device code | |accel-derive|[cargo-doc] macro for generating kernel code|. [crate/accel]: [crate/accel-core]: [crate/accel-derive]: [docs/accel]: [docs/accel-core]: [docs/accel-derive]: [dev/accel]: [dev/accel-core]: [dev/accel-derive]:
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of accel
accel Key Features
accel Examples and Code Snippets
Community Discussions
Trending Discussions on accel
QUESTION
I have a custom galaxy class which has a custom property pos.
pos is an instance of another custom class Vector3D.
A Vector3D has properties x, y, z. The arithmetic operations for Vector3D is basic vector math, the relevant ones below:
ANSWER
Answered 2022-Apr-02 at 11:34auto returns a copy of the object, so the original one is copied, not modified. You're then altering a copy of the original object. Using & will make you reference the original one, so that you can alter it.
QUESTION
Background : I've connected an ADXL335 accelerometer to pins A0,A1,A2 on the Arduino Uno. During the measurement, the Arduino is connected to the laptop via usb, and accelerometer is powered directly by the 3.3V pin on the Arduino. The intention is to read voltage from the accel and plot the corresponding time and frequency spectrum using Python. The overall process is quite straightforward and I'm actually able to achieve this. A snapshot of a signal I recorded is shown below. Arduino code to read/write from the accelerometer and Python code to read from Arduino and construct the plots are provided at the bottom for reference.
The issue I'm facing is with the actual values read by the Arduino (I think).
Problem: There seems to be some noise picked up by the Arduino during the read/write process. To demonstrate this, I ran two separate data acquisitions with the sensor at rest. Snapshots are provided below. I had used a similar system in 7yrs ago in grad school, using National Instruments DAC and LabView. I did experience some noise back then but that was akin to electrical noise ~60 Hz. This one is quite peculiar and I don't know how to deal with it.
Closing: Could someone please help me understand what noise it is, that I'm seeing? Perhaps knowing what this is called will help me research about it in detail and try to tackle it. Any pointers/references would help as well.
Future Scope: I believe that a stable at-rest signal as the first step will greatly help mitigate the offset in Voltage (DC-component in freq-spectrum) even with a simple average. Also, I need to learn how to increase the sampling rate from the uno.
Programs used:
Arduino code to read/write from the accelerometer
...ANSWER
Answered 2022-Mar-22 at 21:24This is spike noise. You should use a median filter to clean your signal. It is a digital non linear filter which you can implement in your software.
Just a note: I don't know which sample frequency are you using but the higher is the sample frequency, the more is the collected noise. So, limit the sample frequency to 2 x signal bandwidth (Shannon theorem)
QUESTION
I want to make a projectile weapon with GDScript but I am getting the error:
the function " _physics _process " already exists in this class (at line 35)
I cannot delete the line of code which has the error as if I do so I will not be able to make my FPS controller character move
here is the the code:
...ANSWER
Answered 2022-Mar-20 at 21:14The error:
"_physics_process" already exists in this class
Is telling you that you have _physics_process twice in your script. You can only have one.
This is the first one:
QUESTION
I've encountered a situation where the code generates different results in the case of having arrays defined inside the loop on index i (case #1) and in the case of declaring them outside the loop on the i index and using the clause private (case #2).
Case #2 generates the same results of the code running on CPU only.
Case #1
...ANSWER
Answered 2022-Mar-15 at 15:00Technically they are equivalent, but in practice different. What's happening is that the compiler will hoist the declaration of these arrays outside of the loops. This is standard practice for the compiler and happens before the OpenACC directives are applied. What should happen is that then these arrays are implicitly privatized within the scoping unit they are declared. However the compiler doesn't currently track this so the arrays are implicitly copied into the compute region as shared arrays. If you add the flag "-Minfo=accel", you'll see the compiler feedback messages indicating the implicit copies.
I have an open issue report requesting this support, TPR #31360, however it's been a challenge to implement so not in a released compiler as of yet. Hence until/if we can fix the behavior, you'll need to manually hoist the declaration of these arrays and then add them to a "private" clause.
QUESTION
I am trying to run an Android emulator on my Windows 11 pro pc that supports virtualization.
When running the following command:
...ANSWER
Answered 2022-Mar-16 at 22:06I had to update VS to the latest version to resolve this issue.
QUESTION
I am making a simulation where you create different balls of certain mass, connected by springs which you can define (in the program below all springs have natural length L and spring constant k). How I do it is I created a function accel(b,BALLS), (note b is the specific ball and BALLS are all of the ball objects in various stages of update) which gets me acceleration on this one ball from calculating all the forces acting on it (tensions from ball the springs connected to it and gravity) and I would think this function is definitely correct and problems lie elsewhere in the while loop. I then use the RK4 method described on this website: http://spiff.rit.edu/richmond/nbody/OrbitRungeKutta4.pdf in the while loop to update velocity and position of each ball. To test my understanding of the method I first made a simulation where only two balls and one spring is involved on Desmos: https://www.desmos.com/calculator/4ag5gkerag I allowed for energy display and saw that indeed RK4 is much better than Euler method. Now I made it in python in the hope that it should work with arbitrary config of balls and springs, but energy isn't even conserved when I have two balls and one spring! I couldn't see what I did differently, at least when two balls on involved. And when I introduce a third ball and a second spring to the system, energy increases by the hundreds every second. This is my first time coding a simulation with RK4, and I expect you guys can find mistakes in it. I have an idea that maybe the problem is caused by because there are multiple bodies and difficulties arises when I update their kas or kvs at the same time but then again I can't spot any difference between what this code is doing when simulating two balls and my method used in the Desmos file. Here is my code in python:
...ANSWER
Answered 2022-Feb-27 at 10:53The immediate error seems to be this
QUESTION
import kivy
from kivy.app import App
from kivy.clock import Clock
from kivy.uix.label import Label
from kivy.uix.gridlayout import GridLayout
class MyGrid(GridLayout):
def __init__(self, **kwargs):
super(MyGrid, self).__init__(**kwargs)
self.rows = 2
self.accel = Label(text = "unknown")
self.orein = Label(text = "unknown")
self.add_widget(self.accel)
self.add_widget(self.orein)
class MyApp(App):
def build(self):
return MyGrid()
Clock.schedule_interval(self.update, 1)
def update(self, dt):
ac = "dfskjjlfh"
ore = "kjdsfkjdf"
App.accel.text = ac
App.orein.text = ore
MyApp().run()
ANSWER
Answered 2022-Feb-28 at 07:12I have no idea about the error you mentioned :
The following code is unreachable
May be the IDLE you are using causes the error (as your posted code will never throw such error).
However, there's indeed some issues with your code.
Firstly, in method build you did,
QUESTION
I was going through the player movement code for the source engine when I stumbled upon the following function:
...ANSWER
Answered 2022-Feb-22 at 18:17I think author make wishspeed simply act as scaler for accel, so the speed of currentspeed reach the wishspeed linear correlated to magnitude of the wishspeed, thus make sure the time required for currentspeed reach the wishspeed is approximately the same for different wishspeed if other parameters stay the same.
And reason above that is because this could create some sort of urgent and relaxing effects which author desired for character's movement, i.e when speed we wish for character is big(small) then character's acceleration is also big(small), no matter sprint or jog, speed change well be finished in roughly same time period.
And player->m_surfaceFriction is even more obvious, author just want an easy(linear) way to let surface friction value affect player's acceleration.
From my own experience, when trying to understand the math related mechanism inside the realm of game development, especially physics or shader, we should focus more on the end effect or user experience the author trying to create instead of the mathematical rigor of the formula.
We shouldn't trap ourselves with question like: is this formula real? or the formula make any physical sense?
Well, if you look and any source code of physics simulation engine, you'll find out most of them if not all of them does not using real life formula, instead they rely on bunch of mathematical tricks to create the end effect that mimic our expectation of real life physics.
E.g, PBD or XPBD one of the most widely used algorithm for cloth or softbody simulation, as name suggest, is position based dynamic, meaning they modify the particle's position explicitly, not as one may expected in a implicit way like in real life (force effect velocity then effect position), why do we using algorithm like this? because it create the visual effect match our expectation better.
QUESTION
Short version
As suggested in comments, I am leaving a summarized, short version of the problem I found here. The original complete explanation can be found below.
In summary, I am currently using the deSolve package and am interested in implementing events in response to root functions. I understand that I can use such events to introduce sudden changes in the state variables of the model, but I would like to also modify parameter values of the model in response to such root functions.
Is this possible?
Long version
I have implemented an orbital numerical propagator (a function to calculate the position of a space satellite given an initial position and velocity state) in R. The problem is formulated as a set of 6 ODEs (X, Y and Z components for position and velocity). My implemented models calculate the acceleration at any given time, and then I use the deSolve package to perform integration and calculate the trajectory.
A key parameter that must be decided when performing such calculation is the center of the frame of reference, which is usually placed at the center of mass of the celestial object that exerts the most significant gravitational influence on the satellite. This is because, even though in principle it is possible to perform integration and calculate the trajectory using any arbitrary frame of reference, in practice we only obtain reasonable results when the center of coordinates is placed on the celestial object that exerts the main gravitational influence (i.e., Earth for Earth-orbiting satellites, Moon for Moon-orbiting satellites, and so on), as discussed in this SE question.
Initially, my implementation used a constant center of coordinates, either provided by the user or automatically determined from the sphere of influence of the different main celestial objects.
However, this is not appropriate for modeling interplanetary space missions, since the celestial object that exerts the main gravitational influence changes during the trajectory. A good example is the Apollo missions, where satellites started in an Earth orbit, and then moved to a Moon orbit.
I have managed to detect when such changes of the central celestial object happen, and return it as part of the results of the integrator. However, in order to actually perform the correct modeling, the central body being used during integration needs to be changed when these changes are detected. This process of "changing the central body" involves two tasks (note that it is just a shift of the center of coordinates, with no rotations involved):
- Subtracting the coordinates of the celestial body to be used as the new center of coordinates from the coordinates of the satellite (by doing so, the coordinates of the satellite are now referred to the new celestial body).
- Modifying the value of the argument specifying the central celestial body that is passed to the function calculating acceleration, which is one of the elements of the list of parameters provided to the function defining the ODE model.
I believe Task 1 can be easily solved by using a root-activated event. In order to do so, I define a variable in an environment specifically created for this purpose that stores the value of the automatically calculated celestial body that exerts the main gravitational influence in each iteration of the integrator. At a new iteration, a new value is calculated, and is compared with the previous value. If it is the same, nothing happens. But if it is different, a root function would return 0, triggering an event function. The event function would then return the position minus the coordinates of the new central celestial body.
However, I am unsure about how to perform Task 2, since this would involve changing one of the initial parameters provided to the ODE model. Any ideas on this would be greatly appreciated! (either a continuation of my approach, or a completely different one).
I am leaving a simplified version of the involved code.
My main function is called hpop, and is the user-level function to which the initial state vector and other parameters are passed. It looks like this:
ANSWER
Answered 2022-Feb-21 at 06:57To change a parameter depending on a root function, one can use an additional state variable (y3 below) that has a derivative zero in the model function and can only be changed by an event. Modifying the bouncing ball example from a tutorial example (Example3) we get:
QUESTION
So I have 8 3d plots (7 3d plots and one 2d plot)
I want to position them in 4 x 2 format. Here is my code for it:
...ANSWER
Answered 2022-Feb-15 at 12:19There is something wrong with how you use rows, columns and index in add_subplot. I hope this here helps:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install accel
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
