Eduardo Pacheco’s Post

Ultra realistic character joint system. Easy-peasy.

This #FunPhysicsFriday, we're showing you how to levitate a lightbulb - with no magic involved! Using a popular desk toy, this article explains how electrodynamic suspension creates this surreal object as well as examining its stability: https://ow.ly/EYKz50Sr3kj

Axis-Aligned Bounding Box (AABB) collision detection is a simple way to check if two rectangles overlap in 2D space. Physics engines, such as Box2D for 2D games, rely heavily on AABBs for collision detection and response. This method is straightforward and efficient, making it popular in game development for detecting collisions between rectangular objects. Do Watch The Video below for better understanding on how the algorithm works 👇👇

Surface light scattering and ray splitting In our last post, we discussed ray-splitting vs. Monte-Carlo mode. In RayJack ONE®, when a ray hits a light-scattering surface in ray-splitting mode, scattered rays are emitted randomly across the hemisphere with their directions following a homogenous distribution, and their fluxes are weighted by the BSDF (ray-flux weighting). Alternatively, targets (“aiming directions”) can be assigned to the scattering object, restricting ray emission to specific directions—this is known as "importance sampling”. This technique is essential for stray light analysis, as it can reduce simulation times by orders of magnitude, and it is ideal for analyzing single scattering events. The picture shows scattering from a surface without and with targets assigned to it. In this example, closed curves are used as targets, but there are more options (directions, physical objects, spheres, etc.). Two questions remain to be answered in subsequent posts: 1.      How can importance sampling be used for multiple scattering calculations?   2.      How can targets be determined efficiently? Learn all about #RayJackONE and its upcoming major release 5.0 by staying updated with us on linkedIn or reaching out via https://lnkd.in/dJfMUa3

We feel blessed to shoot in an era of technological marvels. A glance at your magnified optic choices in 2024 reveals an embarrassment of riches with seemingly endless options and features. While not exactly "cutting-edge" (virtually all modern scopes do this), the ability to adjust parallax to correct the phenomenon that occurs when the reticle and the target do not appear on the same focal plane within a rifle scope continues to be incredibly valuable. Even in a modern world of parallax-adjustable optics, "keep your face on the gun" continues to be a helpful cue for many shooters. Are there any other tried-and-true cues that continue to serve you well today?

In the next two parts, we’ll discuss grating lobes and beam squint. Grating lobes can be hard to visualize, so we’ll draw on their similarity with signal aliasing in digital converters, then use that to think of a grating lobe as a spatial alias. https://bit.ly/3ygnsTD

A clip of STK, Sensor object called “AC_Camera” which has a Rectangular 100x100 deg field of view and attach it to "CertAircraft".

On the stage of accomplishment... Learning solid modeling and progressing each day is truly a journey. Rack & Pinion Type Steering Mechanism...

The first simulation of purely optical odometry using ROS2, Gazebo and NAV2. The positional accuracy is very precise, the orientation needs to be improved for sure. https://lnkd.in/d_zdDgqF

character movement with rotation according to the direction that you have moved your mouse as well as rotation from pressing W,A,S,D.