Blender 2.80.74 beta
I have spent hours trying to figure this out. Watched videos that show how to round (using Bevel) the edges or edge of a uniform mesh cube. Works great.
But my mesh cube is rectangular 10x1x0.2 shape. And I can't get it to work. The edge seems to be beveled proportionally based on the size of the adjoining faces. I want non-proportional beveling. I know this is probably something easy I am missing, but I have spent hours and can't find the answer. I just want to evenly round this edge when looking at the cube.
+-----------+ (this edge)
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+-----------+
Related
I have a camera at a known fixed location and orientation.
I also have a plane at a known location whose z position changes.
I want to turn the image from the camera into a top down view of the plane.
I can do this without knowing any positions by using the 4 points of the plane for a homography matrix and warping the image but each time the plane moves in Z I have to repeat this process.
After searching around online most methods seem to center on finding features of the image (using SIFT or something like it) then computing a homography matrix.
With the problem so constrained I thought there may be a simple linear algebra based approach.
I have 2 overlapping squares which I've rounded the corners on (so no longer squares :) ) by dragging the handle which rounds the corners. I want to overlap the shapes and divide them with the pathfinder. When I do this I get strange effects/artifacts "added" on the square beneath the top one. The artifact is not selectable and does not have any paths, nor does it show if I choose to save for web.
Any clues on how to solve this? My precision for pathfinder is set to 0.001
before divide operation
after divide operation
Seems this is a known problem which can be solved by turning off GPU Performance under illustrator performance preferences.
https://community.adobe.com/t5/illustrator-discussions/gpu-glitch-in-illustrator-25-3-1-weird-corners-jagged-lines-weird-artifacts/m-p/12162860
However, for me that introduced another issue which makes the entire work area go gray when zooming in past 708% (in my case).
https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/43779408-artwork-disappears-when-zoomed-in
Using the latest MBP (updated with latest OS) and most recent version of Illustrator 26.0.3
I made a mesh from a Digital Elevation Map that spanned 1x1 degree box of geography, but when I scale the mesh up to 11139m in blender I get these visible jagged shadows on the peaks of the mesh. I'd prefer to not scale everything down but I suppose I can, it just seems like a strange issue I want to better understand.
My goal is to use the landscape in a WebVR application, but when I put this mesh into an Aframe scene it also has this issue. Thanks for any tips!
Quick answer:
I think this may be caused by the clipping start/end values. Also called near/far clipping planes. Adjusting them may fix the issue but also limit the rendering distance.
Longer explanation:
Take a look at this:
It's a simple grayscale, but imagine it is scaled across your entire scene depth (Z depth buffer). The range of this buffer is set by the start/stop clipping (near/far) camera setting.
By default Blender has its start/stop (near/far) clipping set to 0.01 - 1000.
While A-Frame has it like 0.005 - 10000. You may find more information here: A-Frame camera #properties
That means the renderer has to somehow fit every single point in that range somewhere on the grayscale. That may cause overlapping or Z-fighting because it is simply lacking precision to distinguish the details. And that is mainly visible at edges/peaks because the polygons are connected there at acute angles and the program has to round up the Z-values. That causes overlapping visible as darker shadows (most likely the backside of the polygon behind).
You may also want to read more about Z-fighting because it is somewhat related.
Example
I'm beginner at 3D modelling and I'm making an office chair. Now I'm stuck at wheel area as I need a sloped edge cylinder for the base of the wheel.
Concept: The wheel is attached to a cylindrical base which is attached to the foot of the chair.
Current Situation: I draw foot of chair, made a circle on it and transformed into a cylinder. The end edge of the cylinder has no Face and I want to extrude the cylinder along one edge which will make a sloped area on the open side of area. That should look like this :
But I tried manythings to do, but failed. It's obvious as I said I'm beginner. Please help me do to this.
Note: I'm using blender 2.78
The shear tool will move your mesh the way you want. It doesn't create the geometry so first extrude E and then shear ⎈ Ctrl⎇ Alt⇧ ShiftS the extruded section. Also note that the shear tool always uses the viewport axis, so switch to front or side view to keep the movement in line with your object.
You could also extrude past the point you want and use the knife or bisect tool to cut the geometry at the angle you want.
I found the answer. This doesn't need complex techniques. I just did
Extrude > Merge > At the First.
That's it. Now I got the shape I wanted.
I'm attempting to calculate vertex normals for various game assets. The normals I calculate are used for "inflating" the model (to draw behind the real model producing a thick outline).
I currently compute the normal for each face and average all of them (several other questions on Stack Overflow suggest this approach). However, this doesn't work for sharp corners like this one (adjacent faces' normals marked in orange, the normal I'm trying to calculate is outlined in green).
The object looks like a small pedestal and we're looking at the front-left corner. There are three adjoining faces (the bottom face isn't visible; its normal points straight down).
Blender computes an excellent normal that lies squarely in the middle of the three faces' normals; it seems like it somehow calculates a normal that has minimum rotation to each of the three face normals. Blender's normal also doesn't change when the quads are triangulated differently.
Averaging the faces' normals gives me a different normal that points slightly upward in the Z-axis (-0.45, -0.89, +0.08). Inflating my model this way doesn't produce a good outline because the bottom face of the outline is shifted up and doesn't enclose the original model.
I attempted to look at the Blender source code but couldn't find what I was looking for. If anyone can point me to the algorithm in the Blender source, I'd accept that also.
Weight the surface normals by the angle of the faces where they join. It is a common practice in surface rendering (see discussion here: http://www.bytehazard.com/code/vertnorm.html), and will ensure that your bottom face is weighted stronger than the two slanted side faces. I don't know if Blender does it differently, but you should give it a try.