Cosa | An Object-Oriented Platform for Arduino/AVR

I have a table where every record has two arrows one pointing to up and another one pointing to down, so

For example, if you click the up arrow in the third row that row must change position with the second one or if you click the down arrow it must change position with the fourth row

Right now what I have accomplished is to swap with the up arrow between rows but it's not working with the first row, if you click the up arrow in the first row it will take you down and that's an error, also the down arrow is not currently working on any row

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I am creating a raycasting game from scratch using JavaScript canvas.

Part of the challenge (for me) is to decorate walls with random images (pictures). I already implemented drawing of walls, floor an ceiling and sprites. While drawing walls, I store for each x (depicting screen coordinate) the distance to the wall (Z-BUFFER), the height of the wall (H-BUFFER) and actual coordinates of the pixel in the underlying 2D grid (GRID_BUFFER).

My approach for painting the decals (pictures) on the wall is then the following (after identifying a list of decals that could theoretically be visible):

• distance to the decal's position is calculated (position is defined as being in the middle of the grid vertice facing the observer)
• screen coordinate decalScreenX is calculated based on the transformation matrix from grid coordinates to screen coordinates. This works correctly:

let decalScreenX = Math.floor((RAYCAST.SCREEN_WIDTH / 2) * (1 + CAMERA.transformX /CAMERA.transformDepth));

• Then I retrieve image data for the decal in question and get it's width and height
• And based on the distance and the observed angle, I calculate the percieved width of the decal. This is where the real issue lies, as I see that I don't calculate this width completely accurate.
• with all this information, it is then easy to calculate left and right screen coordinates - where to begin and and where to end drawing the decal, use H-BUFFER to calculate height factor and use GRID_BUFFER to draw only on grid belonging to this decal.

I saw the width calculation in terms that decal is rotated from the player direction vector by an angle, if the player direction is not opposite of the direction with which decal faces the space (example):

or if player direction is directly opposite to the direction of decal, this angle is 0° (example):

My first approach was to use dot product of the reversed player direction and decal facing direction, thus getting cosine of the angle between vectors and use this as a factor to reduce perceived width:

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Im trying to change the image on my button on hover, however, all I find online uses background image in css, I don't want that and that uses all of the space in the button. I want it to just swap the initial image with the final image, this is because, in the mobile version of my webpage I want it to change the background color of the button and change the image with the same image but in a different color.. So far, I have got this:

HTML and CSS

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here my code of head:

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I would like to drag and drop element to the mouse position. For this I need to "sync" THREE.js space to the canvas size ({0,0} coordinates are at the middle of the screen). so let's say my element has a width of 500px if I drop an element with a mouse coordinates x = 500 then object x coordinates should be x = 250. At this point I am using PerspectiveCamera.

I relied on the explanation of this tutorial and made calculation in order to have the fov(field of view) boundaries intersect the boundaries of the green line (in the example circle height, in my case canvas width)

here is what I've done so far to calculate fov base on z position of the camera (mainly using Pythagore).

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I've been trying to add a (code pen) animation on my website and I'm honestly not sure what I'm missing on this one. I have tried running it in jsfiddle as well and it tells me that delaunay is not defined. https://codepen.io/hduffin1/pen/QOMZJg I'm not too sure what I'm doing wrong since the code works inside of code pen and I have been able to replicate other ones that I've tried using from code pen but for whatever reason, I can't seem to get this one to work.

Html

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I have a list of parts that have a part code. I need to align columns B-E to match the list of numbers in column A, leaving blanks where the data has moved down. The number in column B should match the number in column A.

A simple sort will not do because ColumnB,D,E has fewer entries than ColumnA and some numbers in ColumnB are not in ColumnA.

A B C D E '005023 5025 oil-filler-level-plug-genuine-005025 GENUINE PIAGGIO, OIL FILLER PLUG. 1.5 '005024 5027 rear-hub-cone-shim-lambretta-005027 LAMBRETTA REAR HUB CONE SHIM. 1.25 '005025 5031 piston-s2-s3-524mm-125cc-gol-005031 ITALIAN MADE BY GOL 46.5 '005027 5032 exhaust-simonini-px-125-black-005032 135 '005029 5036 floor-runner-kit-vespa-px-125-200-005036 GOOD QUALITY, ITALIAN MADE, COMLETE FLOOR RUNNER KIT 25 '005031 5037 rear-light-grey-top-for-vespa-rally-005037 5 '005032 5038 front-hub-back-plate-chrome-005038 Suitable for all Lambretta S1 S2 S3 models 45 '005033 5041 clutch-plates-surflex-cosa-vespa-px-005041 TOP QUALITY ITALIAN COSA CLUTCH PLATES MADE BY SURFLEX. 16 '005036 5044 points-ducati-style-lambretta-005044 TOP QUALITY,CONTACT BREAKER POINT FOR LAMBRETTA 10 '005037 5045 condensor-ducati-dansi-li-sx-tv-gp-005045 DUCATI TYPE CONDENSOR FOR MOST LAMBRETTAS. 9 '005038 5047 panel-handle-lock-mechanisms-s1-s2-005047 TOP QUALITY, LAMBRETTA SERIES 1 & 2 SIDE PANEL HANDLE MECHANISM KIT. 41 '005040 5049 fork-push-rods-pistons-s1-2-3-005049 TOP QUALITY LAMBRETTA FORK PUSH ROD PISTON SET. 12 '005041 5050 fuel-tank-vespa-gs-160-180ss-rally-005050 100 '005044 5051 wheel-rim-chrome-10-inch-vespa-005051 TOP QUALITY, CHROMED WHEEL RIMS ( 1 X WHEEL ) 38 '005045 5052 carb-box-top-carbon-look-pe-px-efl-005052 VBB SPRINT GT PX 22 '005047 5054 input-shaft-needle-rollers-px-21-005054 ITALIAN MADE SET OF 23 INPUT SHAFT NEEDLE ROLLER BEARINGS 5 '005049 5055 air-hose-clips-19mm-series-2-carb-005055 LAMBRETTA SERIES1 AND 2 AIR HOSE CLIPS FOR STANDARD 5 '005050 5056 air-hose-vespa-vna-005056 6.5 ...

I want the eyes in the image to be horizontal

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I'm trying to iterate a v-divider based on how many answers i have, so that i have a divider for each answer (4). Taking a cue from an example on the official documentation i'm trying something like this but i can't get to the head, someone can explain to me where am i wrong?

This is the code:

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